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1.
Braz. j. biol ; 84: e249169, 2024. tab, graf
Article in English | MEDLINE, LILACS, VETINDEX | ID: biblio-1345546

ABSTRACT

Abstract The American Barn Owl (Tyto furcata) lives in urban, periurban and wild environments and feeds mainly on small rodents, meaning it has great importance in the biological control of pests. The aim of this work was to describe the reproductive, parental and eating habits of a pair of American barn owls naturally living outside a residence in the urban area of the municipality of Campos dos Goytacazes, Rio de Janeiro state, Brazil. A wood box was installed on an outside wall of the home, monitored by a video camera. A spreadsheet was created to keep track of the observations recorded. The female laid four eggs, and after an incubation period of 30-32 days all the eggs hatched, but only two chicks survived after cannibalism among the chicks. Initially, the male provided the food to the chicks and the female remained in the nest caring for the brood. After approximately a month, the female also began to leave the nest and return with prey, which was offered to the chicks, with the male also continuing this behavior. The chicks left the nest in September, 2017. The data obtained show the existence of cooperation and division of tasks between male and female owls during the reproductive period.


Resumo A coruja-das-torres americana (Tyto furcata) vive em ambientes urbanos e se alimenta principalmente de pequenos roedores, sendo de grande importância no controle biológico de pragas. O objetivo deste trabalho foi descrever os hábitos alimentares, parentais e reprodutivos de um casal de corujas-das-torres americanas, naturalmente vivendo fora de uma residência na zona urbana do município de Campos dos Goytacazes, estado do Rio de Janeiro, Brasil. Uma caixa de madeira foi instalada em uma parede externa da casa, monitorada por uma câmera de vídeo. Uma planilha foi criada para manter o controle das observações registradas. A fêmea pôs quatro ovos, e após período de incubação de 30-32 dias todos os ovos eclodiram, mas apenas dois filhotes sobreviveram após o canibalismo entre os filhotes. Inicialmente, o macho fornecia a comida aos filhotes e a fêmea permanecia no ninho cuidando da ninhada. Depois de cerca de um mês, a fêmea também começou a sair do ninho e voltar com a presa, que era oferecida aos filhotes, com o macho também continuando com esse comportamento. Os filhotes deixaram o ninho em setembro de 2017. Os dados obtidos mostram a existência de cooperação e divisão de tarefas entre corujas machos e fêmeas durante o período reprodutivo.


Subject(s)
Animals , Male , Female , Strigiformes , Reproduction , Brazil , Feeding Behavior
2.
Braz. j. biol ; 82: e243114, 2022. tab, graf
Article in English | MEDLINE, LILACS, VETINDEX | ID: biblio-1278478

ABSTRACT

Abstract Littoraria angulifera (Lamarck, 1822) is an estuarine gastropod of tropical occurrence, which lives mainly on trunks of mangrove tree species. This study aimed to evaluate the population attributes of this species, such as abundance, space-time distribution, sex ratio and recruitment in mangroves in Bahia State, northeastern Brazil. The specimens were collected monthly throughout 2018, on trunks of the red mangrove Rhizophora mangle L. at two heights and on two horizontal levels. Specimens that were on the marine grass Spartina alterniflora Loisel were also collected. After counting, biometrics and sexing, the specimens were returned alive to the environment. The average size and weight of L. angulifera was higher (p<0.05) in places with taller and less sparse trees and the vertical distribution on the trunks showed a preference for strata close to the soil. Both results are related to shading and protection against desiccation. Females were more abundant than males, at an approximate sex ratio F: M of 1.4: 1. Recruits were observed throughout the period, showing continuous reproduction of the species with a recruitment peak in spring (September to November). The study revealed the importance of keep the mangroves intact to allow the maintenance of the natural stocks of the species.


Resumo Littoraria angulifera (Lamarck, 1822) é um gastrópode estuarino, de ocorrência tropical, que vive principalmente sobre troncos de espécies arbóreas de mangue. Este estudo teve como objetivo avaliar os atributos populacionais dessa espécie, como abundância, distribuição espaço-temporal, razão sexual e recrutamento em manguezais do estado da Bahia, nordeste do Brasil. Os espécimes foram coletados mensalmente ao longo de 2018, em troncos do mangue vermelho Rhizophora mangle L. em duas alturas e em dois níveis horizontais. Também foram coletados espécimes que estavam na grama marinha Spartina alterniflora Loisel. Após contagem, biometria e sexagem, os espécimes foram devolvidos vivos ao ambiente. O tamanho e peso médios de L. angulifera foram maiores (p<0,05) em locais com árvores mais altas e menos esparsas e a distribuição vertical nos troncos mostrou preferência por estratos próximos ao solo. Ambos os resultados estão relacionados ao sombreamento e proteção contra a dessecação. As fêmeas foram mais abundantes que os machos, em uma proporção sexual aproximada F: M de 1,4: 1. Recrutas foram observados ao longo do período, mostrando reprodução contínua da espécie, com um pico de recrutamento na primavera (setembro a novembro). O estudo revelou a importância de manter os manguezais intactos para permitir a manutenção dos estoques naturais da espécie.


Subject(s)
Animals , Male , Female , Rhizophoraceae , Gastropoda , Trees , Brazil , Population Density
3.
Braz. j. biol ; 82: e240724, 2022. tab, graf
Article in English | LILACS | ID: biblio-1249270

ABSTRACT

Abstract Developing a captive breeding system for the widely hunted Caribbean species of opossum Didelphis marsupialis insularis can greatly aide in the management and conservation of this species in the neo-tropics. Although this species possesses ideal traits for captive breeding in this region (tolerance to high heat and humidity, high reproductive rate, and resistance to disease), challenges due to its aggressive behaviour and limited information on its breeding behaviour have prevented a system from being developed for this species. The present study describes a breeding system, and the reproductive behaviour of this species under captive conditions. Six (1 male; 5 females) adult opossums were maintained and managed for breeding over a ten (10) month period. Pouch litter sizes averaged 5±2.5 with a range of 2 to 8. Gestation length was found to be 13.25±0.96 days and 4 litters (n=23) were successfully weaned at 11-13 weeks. It was found that the male D. m. insularis exhibits behaviours of interest that can serve as indicators for receptivity of the female, and overall, that this species can be successfully reared and bred under captive conditions in the neo-tropics.


Resumo O desenvolvimento de um sistema de criação em cativeiro para as espécies de gambá do Caribe amplamente caçadas, Didelphis marsupialis insularis, pode auxiliar bastante no manejo e conservação dessa espécie nos neotrópicos. Embora essa espécie possua características ideais para a criação em cativeiro nessa região (tolerância a altas temperaturas e umidade, alta taxa de reprodução e resistência a doenças), alguns fatores, como o seu comportamento agressivo e informações limitadas sobre seu comportamento reprodutivo, impediram o desenvolvimento de um sistema para D. m. insularis. O presente estudo descreve um sistema de criação e o comportamento reprodutivo dessa espécie em condições de cativeiro. Seis gambás adultos (1 macho e 5 fêmeas) foram mantidos para reprodução durante um período de 10 meses. O tamanho da ninhada em bolsa foi em média de 5 ± 2,5 com um intervalo de 2 a 8. A duração da gestação foi de 13,25 ± 0,96 dias, e 4 ninhadas (n = 23) foram desmamadas com sucesso de 11 a 13 semanas. Verificou-se que o macho D. m. insularis exibe comportamentos de interesse que podem servir como indicadores de receptividade da fêmea, e, em geral, essa espécie pode ser criada com sucesso em condições de cativeiro nos neotrópicos.


Subject(s)
Animals , Male , Female , Pregnancy , Reproductive Behavior , Didelphis , Opossums , Reproduction , Caribbean Region , Litter Size
4.
Arq. bras. med. vet. zootec. (Online) ; 73(6): 1269-1277, Nov.-Dec. 2021. tab, ilus
Article in English | LILACS, VETINDEX | ID: biblio-1355673

ABSTRACT

The objective of this study was to quantify the number and frequency of monocyte (MnOF) and multi-oocyte (MtOF) follicles in ovaries of bitches subjected to ovary salpingohysterectomy (OSH). Right and left ovaries of 38 bitches were collected after OSH, prepared, and a histological analysis was carried out. The ovaries were subjected to surface and deep histological cuts; the follicles were classified, and the number of follicles and cumulus oophorus complexes (COC) per follicle were quantified for each histological cut. MnOF and MtOF were found in all ovaries, at different developmental stages; primary follicles were grouped in the ovarian cortex, and follicles at other follicular stages presented a random distribution. MtOF containing two, three, four, or more COC were found in the ovaries of bitches, with a decreasing frequency trend, according to the number of COC in the MtOF. The effect of the age, number of estrus, estrus interval, and number of progenies per delivery was not significant for the number and frequency of MtOF in the ovaries of the bitches, whereas the size, number of pregnancies, use and number of contraceptive applications had some effect on the number and frequency of MtOF in the ovaries of the bitches.(AU)


Objetivou-se, com este estudo, quantificar o número e a frequência de folículos monocitários (MOF) e polioocitários (POF) provenientes de ovários de cadelas submetidas à ovariossalpingo-histerectomia (OSH). Para tanto, coletaram-se os ovários (direito e esquerdo) de 38 cadelas após OSH, com posterior preparação e análise histológica. Cada ovário foi submetido a dois cortes histológicos (superficial e profundo) onde se quantificou o número e a classificação dos folículos, bem como o número de complexos cumulus oophorus (COCs) por folículo em cada corte histológico. Observaram-se MOF e POF em todos os ovários estudados, em diferentes estádios de desenvolvimento, sendo os folículos primários agrupados no córtex ovariano, frente a uma distribuição aleatória dos outros estádios foliculares. FOPs contendo dois, três, quatro ou mais COCs foram observados nos ovários de todas as fêmeas estudadas, e sua frequência tendeu a diminuir de acordo com o número de COC presente no POF. Não se observou influência da idade, do número e do intervalo de estros, assim como do número de filhotes por gestação sobre o número/frequência de FOP nos ovários das cadelas estudadas, enquanto o porte, o número de gestações, o uso e o número de contraceptivo apresentaram algum grau de influência sobre o número/frequência de FOP nos ovários das cadelas estudadas.(AU)


Subject(s)
Animals , Female , Cats , Oocytes/classification , Cumulus Cells/classification , Ovarian Follicle , Periodicity , Ovariectomy/veterinary , Hysterectomy/veterinary
5.
Rev. colomb. biotecnol ; 23(2): 25-35, jul.-dic. 2021. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1360961

ABSTRACT

RESUMEN Bocachico Prochilodus magdalenae es una especie endémica y la más importante de la pesquería continental colombiana. No obstante, sus capturas han disminuido aproximadamente el 67% en los últimos cuarenta años, por tanto ha sido categorizada como vulnerable a la extinción. La criopreservación de semen, es una herramienta biotecnológica de conservación por tanto el objetivo del presente estudio fue evaluar la criopreservación de semen de bocachico con etilenglicol (EG) y leche en polvo descremada (LP). La solución crioprotectora estuvo compuesta por EG (6, 8 o 10%), LP (3, 5 o 7%) y glucosa 6%. La calidad del semen descongelado se evaluó con un software tipo CASA (computer assisted semen analysis). El porcentaje de inclusión de EG, no afectó significativamente ninguno de los parámetros de calidad seminal evaluados (p>0,05), a excepción de la tasa de eclosión (p<0,05); mientras que, la LP afectó significativamente el porcentaje de espermatozoides estáticos (p<0,05) y las tasas de fertilización y eclosión (p<0,01). La mayor movilidad total se obtuvo cuando EG se incluyó a 10% y la LP a 7% (38,4±18,4%) (p<0,05); pero las mayores tasas de fertilización (54,3-64,2%) y eclosión (47,7-57,5%) se obtuvieron cuando EG se incluyó a 6 u 8% y la LP se incluyó a la menor concentración evaluada (3%), sin observarse diferencia significativa entre estos tratamientos (p>0,05). Los resultados permiten concluir que la combinación EG 6% con LP 3% permiten la criopreservación de semen de Prochilodus magdalenae de buena calidad y capacidad fecundante.


ABSTRACT Bocachico Prochilodus magdalenae is an endemic species and the most important of the Colombian continental fishery. Its catches have decreased by approximately 67% in the last forty years and, it has been categorized as extinction vulnerable. Semen cryopreservation is a biotechnological conservation tool; therefore, the aim of this study was to evaluate bocachico semen's cryopreservation with ethylene glycol (EG) and skimmed milk powder (LP). The cryoprotective solution was composed of EG (6, 8 or 10%), LP (3, 5 or 7%) and glucose at 6%. The quality of the thawed semen was evaluated with CASA software (computer assisted semen analysis). The inclusion percentage of EG did not significantly affect any of the evaluated semen quality parameters (p>0,05), except for the hatching rate (p <0.05). In contrast, LP presented significant effects on the percentage of static sperm (p <0,05) and on fertilization and hatching rates (p<0,01). The highest total motility was achieved with EG included at 10% and the LP 7% (38,4±18,4%) (p<0,05); but the highest fertility rates (54,3-64,2%) and hatching (47,7-57,5%) were registered when EG included at 6 or 8% and LP included at the lowest rate evaluated (3%), no significant difference was observed between these treatments (p>0,05). The results allow us to conclude that the combination EG 6% with LP 3% allows the cryopreservation of Prochilodus magdalenae semen of good quality and fertilizing capacity.

6.
Av. psicol. latinoam ; 39(3): 1-16, sep.-dic. 2021. graf, ilus
Article in Spanish | LILACS, COLNAL | ID: biblio-1367023

ABSTRACT

El presente artículo propone un enfoque empírico de la ética derivado de la teoría psicológica del juicio humano propuesta por Norman Anderson. Muestra cómo la metodología de esta teoría ­denominada medición funcional­ puede utilizarse para caracterizar las diversas posiciones personales que existen en todas las sociedades respecto a los problemas de salud pública. Los principales resultados de tres estudios realizados en tres países diferentes (Guinea, Francia y Colombia) se presentan como ilustración de lo que puede aportar este enfoque. Dichos análisis se centraron en tres problemas deliberadamente muy diferentes: (a) el deber de atender a los pacientes infectados, en caso de una epidemia que ponga en peligro la vida de los cuidadores; (b) la aceptabilidad de la reproducción postmortem, en el caso de los soldados que mueren en combate, y (c) la aceptabilidad del suicidio asistido por un médico


This paper presents the proposal of an empirical ap-proach to ethics derived from a psychological theory of human judgment proposed by Norman Anderson. It shows how the methodology specific to this theory ­functional measurement­ makes it possible to char-acterize the various personal positions that exist in all societies regarding public health problems. The main results of three studies carried out in three different countries (Guinea, France, and Colombia) on various problems are presented as an illustration of what this approach can offer. These analyses focused on three deliberately very different problems: (a) the duty to care for infected patients in the event of a pandemic that puts at risk the lives of the health professionals, (b) the acceptability of postmortem reproduction in the specific context of fallen soldiers, and (c) the accept-ability of physicianassisted suicide


Este artigo propõe uma abordagem empírica da ética derivada da teoria psicológica do julgamento humano proposta por Norman Anderson. Mostra como a metodo-logia dessa teoria ­ denominada medição funcional­ pode ser utilizada para caracterizar as diversas posições pessoais que existem em todas as sociedades em relação aos problemas de saúde pública. Os principais resulta-dos de três estudos, realizados em três países diferentes (Guiné, França e Colômbia), são apresentados como uma ilustração do que esta abordagem pode contribuir. Esses estudos se concentraram em três problemas de-liberadamente muito diferentes: (a) o dever de cuidar de pacientes infectados no caso de uma epidemia que ponha em risco a vida dos cuidadores, (b) a aceitabilida-de da reprodução postmortem no caso de soldados que morrem em combate, e (c) a aceitabilidade do suicídio assistido por médicos


Subject(s)
Humans , Ethics , Psychological Theory , Public Health , Suicide, Assisted , Judgment
7.
Arq. Ciênc. Vet. Zool. UNIPAR (Online) ; 24(2, cont.): e2408, jul-dez. 2021. ilus, graf
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1352315

ABSTRACT

A inseminação artificial em tempo fixo (IATF) é uma biotécnica com inúmeras vantagens para a produção de bovinos. Para a realização da IATF, as fêmeas bovinas devem receber um protocolo farmacológico que induz a ovulação de forma sincronizada. Esse protocolo inicia com a inserção de um dispositivo impregnado com progesterona que deve permanecer no fundo vaginal da fêmea por tempo determinado. O presente relato tem por objetivo descrever a remoção de um implante impregnado com progesterona que foi encontrado na cavidade abdominal de uma novilha. Durante um atendimento reprodutivo de rotina em uma propriedade rural, uma novilha da raça Jersey, recém-adquirida, com histórico de ter sido submetida à IATF, foi avaliada para diagnóstico de gestação. No exame a novilha não estava gestante e apresentava um cisto folicular ovariano. A novilha foi submetida novamente à IATF em que foi inserido e removido um implante, com isso o cisto regrediu e ao inseminar a novilha não foi possível passar a cérvix com o aplicador. Vinte dias após a inseminação a novilha manifestou estro e ao ser avaliada para nova inseminação, foi identificado um implante solto na cavidade abdominal da novilha. Foi realizada uma laparotomia pelo flanco esquerdo e o implante foi removido. Após a recuperação da cirurgia a novilha foi inseminada e novamente e ficou gestante. Os protocolos de IATF devem ser realizados por profissionais capacitados para evitar problemas como a presente situação em que um implante foi encontrado na cavidade abdominal de uma novilha.(AU)


The fixed-time artificial insemination (FTAI) is a biotechnique with numerous advantages for cattle production. In order to perform the FTAI, the cows must receive a pharmacological protocol to induce ovulation in a synchronized way. This protocol begins with the insertion of a device impregnated with progesterone that must remain in the vaginal fundus of the cow for a specific period of time. This report aims at describing the removal of a progesterone impregnated implant that was found in the abdominal cavity of a heifer. During a routine reproductive service in a rural property, a recently acquired Jersey heifer, with history of having been submitted to FTAI, was evaluated for pregnancy diagnosis. At the exam, it was observed that the heifer was not pregnant and presented an ovarian follicular cyst. The heifer was then submitted to FTAI again, where an implant was inserted and removed. This made the cyst to recede, and upon subsequent insemination, the applicator was not able to pass the cervix. Twenty days after insemination, the heifer was in estrus and when it was evaluated for insemination, a loose implant was identified in the abdominal cavity of the heifer. A laparotomy was performed through the left flank and the implant was removed. After recovery from the surgery, the heifer was inseminated again and became pregnant. The FTAI protocols should only be carried out by trained professionals to avoid problems such as the one presented herein, where an implant was found in the abdominal cavity of a heifer.(AU)


La inseminación artificial a tiempo fijo (FTAI) es una biotécnica con numerosas ventajas para la producción de ganado. Para realizar FTAI, las hembras bovinas deben recibir un protocolo farmacológico que induzca la ovulación de forma sincronizada. Este protocolo comienza con la inserción de un dispositivo impregnado con progesterona que debe permanecer en el fondo vaginal de la hembra durante un tiempo específico. Este informe tiene como objetivo describir la extracción de un implante impregnado de progesterona que se encontró en la cavidad abdominal de una novilla. Durante la atención reproductiva de rutina en una propiedad rural, se evaluó el diagnóstico de preñez de una novilla de Jersey recién adquirida con antecedentes de someterse a FTAI. En el examen, la novilla no estaba embarazada y tenía un quiste folicular ovárico. La novilla fue nuevamente sometida a FTAI, en la cual se insertó y removió un implante, con esto el quiste retrocedió y al inseminar a la novilla no fue posible pasar el cérvix con el aplicador. Veinte días después de la inseminación, la vaquilla manifestó estro y cuando se evaluó para una nueva inseminación, se identificó un implante suelto en la cavidad abdominal de la vaquilla. Se realizó una laparotomía a través del flanco izquierdo y se extrajo el implante. Después de recuperarse de la cirugía, la novilla fue inseminada y nuevamente quedó embarazada. Los protocolos FTAI deben ser realizados por profesionales capacitados para evitar problemas como la situación actual donde se encontró un implante en la cavidad abdominal de una novilla.(AU)


Subject(s)
Animals , Cattle , Ovulation , Progesterone , Pregnancy, Animal , Insemination, Artificial , Cervix Uteri , Foreign Bodies , Estrus
8.
urol. colomb. (Bogotá. En línea) ; 30(3): 194-198, 15/09/2021.
Article in English | LILACS-Express | LILACS | ID: biblio-1369429

ABSTRACT

Introduction Glyphosate is an herbicide used to eradicate illicit crops; however, its use is controversial due to different health problems associated with it. The present study aims to evaluate the effects of glyphosate on human sperm in vitro. Methods Twenty-two semen samples from healthy normozoospermic men were included; 11 semen samples were incubated with Panzer (INVESA S.A., Antiquia, Colombia) and 11 with Roundup (Monsanto Company, MO, USA). The changes in motility and viability were observed. Functional seminal parameters were evaluated as well. Results The samples exposed to glyphosate showed less motility and viability; a decrease in the potential of the mitochondrial membrane was observed, and an increase in the lipoperoxidation of the membrane was evidenced. Conclusion Based on the present results, we concluded that

9.
Rev. peru. ginecol. obstet. (En línea) ; 67(3): 00005, jul.-sep 2021.
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1361089

ABSTRACT

RESUMEN Se describe la historia de los pioneros de la reproducción humana en el Perú -el Centro Peruano de Fertilidad Matrimonial y el Consultorio de Infertilidad Matrimonial del Pabellón 5, Sala 3 del Servicio de Ginecología de Hospital Loayzay cómo evolucionaron los estudios en este campo, así como, la vida académica de la Sociedad Peruana de Fertilidad, su fundación, sus presidentes y la gran influencia que tuvo en la reproducción latinoamericana. Observamos la evolución de los diagnósticos y tratamientos desde 1950 hasta el nacimiento del primer bebe concebido por fertilización in vitro y trasferencia embrionaria en Inglaterra, en 1978, y la posterior implementación de este procedimiento y sus variantes en el Perú y el mundo.


ABSTRACT We describe the history of the pioneers of human reproduction in Peru -the Peruvian Center of Marital Fertility and the Marital Infertility Clinic of Pavilion 5, Room 3 of the Gynecology Service of the Loayza Hospitaland how studies in this field evolved, as well as the academic life of the Peruvian Fertility Society, its foundation, its presidents and the great influence it had on Latin American reproduction. We observe the evolution of diagnoses and treatments from 1950 to the birth of the first baby conceived by in vitro fertilization and embryo transfer in England in 1978, and the subsequent implementation of this procedure and its variants in Peru and the world.

10.
Acta biol. colomb ; 26(1): 54-61, ene.-abr. 2021. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1152668

ABSTRACT

RESUMEN Se estudió la biología reproductiva del Bocachico, Prochilodus magdalenae, en el río San Jorge, Colombia. La especie es un pez con proporción sexual hembra: macho de 1,2:1, diferente a lo esperado. Presenta desarrollo ovocitario sincrónico en dos grupos, un desove anual que se extiende de abril a septiembre asociado al ciclo hidrológico del río San Jorge, talla media de madurez sexual estimada en 30,2 cm LT, ovocitos grandes de 950 μm y fecundidad promedio de 109 972 ovocitos, cuya ecuación fue F =7271,6 WO0,60, r =0,93, n =14.


ABSTRACT The reproductive biology of the Bocachico, Prochilodus magdalenae, in the San Jorge River, Colombia, was studied. The species is a fish with sexual proportion female: male of 1.2:1, different than expected. It presents synchronous ovocitary development in two groups, an annual spawning that extends from April to September associated to the hydrological cycle of the San Jorge River, length at first maturity estimated in 30.2 cm TL, large oocytes of 950 μm, and average fecundity of 109 972 oocytes, whose equation was F = 7271,6 OW0,60, r = 0,93, n = 14.

11.
Arq. bras. med. vet. zootec. (Online) ; 73(2): 451-459, Mar.-Apr. 2021. tab, graf
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1248940

ABSTRACT

O objetivo deste estudo foi avaliar os efeitos das estações do parto e da inseminação, da retenção de placenta, da natimortalidade e da ordem de parto sobre o desempenho reprodutivo de vacas leiteiras. Utilizou-se a regressão logística, em que as variáveis dependentes foram concepção à primeira inseminação pós-parto e percentual de vacas prenhes no rebanho aos 100, 150 ou 200 DEL e as variáveis independentes foram a estação do parto e a estação da inseminação, a retenção de placenta, a natimortalidade e a ordem de parto. A estação do parto e a estação da inseminação influenciaram o desempenho reprodutivo, reduzindo a fertilidade das vacas nas estações quentes do ano. O atraso na primeira inseminação aumentou a concepção na primeira inseminação, mas reduziu o percentual de vacas prenhes ao longo da lactação. O desempenho reprodutivo da vaca leiteira foi afetado por vários fatores, relacionados à vaca, ao ambiente e ao manejo a ela imposto.(AU)


The objective of this study was to evaluate the effects of the calving season, insemination, placenta retention, stillbirth and birth order on the reproductive performance of dairy cows. Logistic regression was used, where the dependent variables were conception at the first postpartum insemination and the percentage of cows pregnant in the herd at 100, 150 and 200 DEL. The independent variables were delivery season and insemination season, placenta retention, stillbirth and delivery order. The calving season and the insemination season influenced reproductive performance, and in the hot seasons of the year the fertility of the cows was reduced. The delay in the first insemination increased conception in the first insemination but reduced the percentage of pregnant cows during lactation. The reproductive performance of the dairy cow was affected by several factors, related to the cow, the environment and the management imposed on it.(AU)


Subject(s)
Animals , Female , Cattle , Reproduction/physiology , Pregnancy, Animal , Abiotic Factors , Logistic Models
13.
Arq. bras. med. vet. zootec. (Online) ; 73(1): 115-122, Jan.-Feb. 2021. tab, ilus
Article in English | LILACS, VETINDEX | ID: biblio-1153053

ABSTRACT

The objective of this study was to quantify the superovulatory response and embryo production of Brazilian Bergamasca sheep and to evaluate the link to the follicular condition before superovulatory treatment, as a reference for selection of donors with potential for superovulation. Follicular population of twenty-three sheep was evaluated by ultrasound during metestrus phase of the estrous cycle and divided into groups of low, medium and high follicular population. Subsequently, they were synchronized, superovulated with 133mg of pFSH, mated and subjected to embryo collection. The superovulatory response (9.0±3.3 vs 10.7±6.2 vs 13.8±7.1) and embryo production (4.0±3.8 vs 2.6±2.0 vs 1,8±4.0) were similar between groups (P>0.05). There was a positive correlation between the number of follicles during the metestrus phase and the number of corpus luteum with premature regression (PLR) (0.52) and a negative correlation between the recovery rate and PLR (-0.44) (P<0.05). The sheep that presented PLR had more follicles during metestrus (16.9±7.8 vs 12.7±3.2) and lower embryo recovery rate (38.8±29.3 vs 72.2±29.9) than those with functional CLs (P<0.05). Follicular quantification during metestrus phases was unable to identify donors with high embryo production. Animals with PLR had a larger follicular population during metestrus and lower embryo recovery rate.(AU)


O objetivo deste trabalho foi quantificar a resposta superovulatória e a produção embrionária de ovelhas Bergamácia Brasileira e relacioná-las com a condição folicular antes do tratamento superovulatório, como referência para seleção de doadoras com potencial para superovulação. Vinte e três ovelhas foram avaliadas quanto à população folicular por ultrassonografia na fase de metaestro do ciclo estral e divididas em grupos com baixa, média e alta população folicular. Posteriormente foram sincronizadas, superovuladas com 133mg de pFSH, acasaladas e submetidas à coleta de embriões. A resposta superovulatória (9,0±3,3 vs. 10,7±6,2 vs. 13,8±7,1) e a produção embrionária (4,0±3,8 vs. 2,6±2,0 vs. 1,8±4,0) foram semelhantes entre os grupos (P>0,05). Houve correlação positiva entre o número de folículos no metaestro e o número de corpos lúteos com regressão prematura (RPCL) (0,52) e correlação negativa entre a taxa de recuperação e RPCL (-0,44) (P <0,05). As ovelhas que apresentaram RPCL tiveram mais folículos no metaestro (16,9±7,8 vs. 12,7±3,2) e menor taxa de recuperação embrionária (38,8±29,3 vs. 72,2±29,9) do que as que apresentaram CLs funcionais (P<0,05). A quantificação folicular nas fases de metaestro não foi capaz de identificar doadoras com alto potencial de produção embrionária. Animais com RPCL tiveram maior população folicular no metaestro e menor recuperação de embriões.(AU)


Subject(s)
Animals , Female , Superovulation/drug effects , Sheep , Luteolysis , Embryonic Structures , Ovarian Follicle , Ultrasonography/veterinary
14.
Arq. bras. med. vet. zootec. (Online) ; 73(1): 123-131, Jan.-Feb. 2021. tab
Article in English | LILACS, VETINDEX | ID: biblio-1153058

ABSTRACT

The aim of this study was to evaluate the reproductive performance of sows in individual stalls (Stall) or group-housed into groups on days 3 to 5 (Pen5) or 38 to 42 (Pen42) after breeding. The reproductive data was collected from the operating system of the farm establishing the average of the weekly performances of the sows that gave birth, for four years, except for the Pen5 system, which was evaluated for three years. Statistical analyses were performed using SAS®, using MIXED (for quantitative traits), NPAR1WAY (for categorical traits) and LOGISTIC (binomial traits) procedures, using sows as a repeated measure. Sows in Stall system had piglets with higher birth weight them sows in the group-housed system (P<0.05), however the piglets born alive, total piglets weaned, average litter weight, and duration of farrowing were lower in this system than in the group-housed (P<0.0001). There was no difference between Pen5 and Stall systems for gestation period and mummified piglets. The Pen42 system had a higher percentage of mummified piglets and a shorter gestation period, when compared Pen5 and Stall systems (P<0.0001), and similar results to the Pen5 system for duration of farrowing, piglets born alive, stillbirths, total piglets weaned, average litter weight and birth weight (P<0.0001).(AU)


O objetivo deste estudo foi avaliar a performance reprodutiva de matrizes suínas alojadas individualmente (Individual) ou em grupos, nos dias 3 a 5 (Grupo 5) ou 38 a 42 (Grupo 42) após a inseminação. Os dados reprodutivos foram coletados do sistema operacional da granja, estabelecendo-se a média dos desempenhos semanais das matrizes que pariram por semana, durante quatro anos, exceto para o sistema Grupo 5, que foi avaliado por três anos. A análise estatística foi realizada com SAS®, usando-se os procedimentos MIXED (para variáveis quantitativas), NPAR1WAY (para variáveis categóricas) e LOGISTIC (para variáveis binomiais), tendo a matriz como uma medida repetida. As matrizes no sistema Individual tiveram leitões com maior média de peso ao nascer do que as matrizes nos sistemas de alojamento em grupo (P<0,05), porém os leitões nascidos vivos, o total de leitões nascidos, o peso médio da leitegada e a duração do parto foram menores no sistema Individual do que nos sistemas de alojamento em grupo (P<0,0001). Não houve diferença entre os sistemas Grupo 5 e Individual para o tempo de duração da gestação e o número de leitões mumificados. O sistema Grupo 42 apresentou maior porcentagem de leitões mumificados e menor período de gestação, quando comparado aos sistemas Grupo 5 e Individual (P<0,0001), e resultados semelhantes ao sistema Grupo 5 para duração do parto, leitões nascidos vivos, natimortos, total de leitões desmamados, peso médio da leitegada e peso ao nascer (P<0,0001).(AU)


Subject(s)
Animals , Female , Reproduction , Swine/physiology , Animal Welfare , Birth Rate , Parturition
15.
Acta cir. bras ; 36(2): e360201, 2021. tab
Article in English | LILACS-Express | LILACS | ID: biblio-1152703

ABSTRACT

ABSTRACT Purpose The spleen is relevant in blood purification, hematopoiesis, metabolism, and immune response to antigens, in addition to the storage and control on the release of metals and amino acids. Its functions concerning reproduction characteristics are still unknown. The objective was to study the influence of splenectomies on reproduction. Methods This study analyzed 25 mice couples, distributed into five groups: group 1 - control, no surgery: group 2 - control, submitted to laparotomy and laparorrhaphy only; group 3 - splenectomy in male mice; group 4 - splenectomy in female mice; group 5 - splenectomy in male and female mice. The animals were studied as regards the number of gestations and offspring generated in each gestation. Results A decrease in both the number of gestations and the number of offspring was verified in the male mice that had received a splenectomy when coupled with normal female mice. It is important to emphasize lower reproduction level when paired asplenic males with normal females, otherwise, the couples in which both mice had been splenectomized did not present change in the reproduction pattern. Conclusions A reduction in the number of pregnancies and litters occurs in mice couples when the male mice were previously splenectomized.

16.
Ciênc. rural (Online) ; 51(7): e20190222, 2021. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1153925

ABSTRACT

ABSTRACT: The purpose of this research was to study the histology and describe the microscopy findings of the epididymis epithelium of greater Rhea americana at three time periods: November 2005 (n=14), December 2006 (n= 20), and May 2007 (n= 20), to observe and compare the differences that occurred. We studied the epididymis from 54 rheas, bred in Santa Maria, Rio Grande do Sul, Brazil. The epididymis were collected during commercial slaughter and fixed in bouin. Optical microscopy was used to measure the cellular structure, types of cells, tubules, and stereological values like the epididymis epithelium diameters, lumen, thickness, and relative volume of the tissue structure. Additionally, electron microscopy was studied. In December 2006 and May 2007, the means of the epididymis tubular diameter were: 79.1 and 58.1 µm, epithelium thickness: 24.0 and 52.2 µm, and lumen diameter: 55.0 and 5.8 µm, respectively. Regarding the volumetric proportion, we reported the following values: epithelium volume 36.2 and 80.4%, lumen without spermatozoon 19.6 and 3.0%, lumen with spermatozoon 5.4 and 0.0%, interstitium 35.4 and 12.0%, blood vessels 3.5 and 4.6%, structures in cellular superficies 1.4 and 0%, lamina 1.4 and 3.2%, and artifacts 0.3 and 1.3%, respectively. The epididymis ducts had a circular form in transverse sections with spermatozoon only in November 2005 and December 2006. The Rhea's epididymis morphology was found to be similar to ostriches, roosters, and Japanese quail. Here, we present data from stereological microscopy (tubular diameter, epithelium thickness, and lumen diameter), volumetric proportion (epithelium, lumen without spermatozoon, lumen with spermatozoon, interstitium, blood vessels, structures in cellular superficies; cilium, estereocilium, and lamina) in this species during the repose and sexual activity period (reproductive season).


RESUMO: O objetivo desta pesquisa foi estudar a histologia e descrever os achados microscópicos do epitélio epidídimo de ema em três períodos: novembro/2005 (n = 14), dezembro/2006 (n = 20) e maio/2007 (n = 20), para observação e comparação das diferenças que ocorreram nesses tempos distintos. Estudamos o epidídimo de 54 animais, criados em Santa Maria, RS. Durante o abate comercial, os epidídimos foram coletados e fixados em Bouin. A microscopia óptica mede a estrutura celular, tipos de células, túbulos e valores estereológicos, como os diâmetros do epitélio do epidídimo, lúmen, espessura, volume relativo da estrutura do tecido. Em dezembro/2006 e maio/2007, as médias do diâmetro tubular do epidídimo foram: 79,1 e 58,1µm, espessura do epitélio: 24,0 e 52,2µm, diâmetro do lúmen: 55,0 e 5,8µm, respectivamente. Em relação à proporção volumétrica, encontramos os seguintes valores: volume epitelial 36,2 e 80,4%, lúmen sem espermatozoide 19,6 e 3,0%, lúmen com espermatozoide 5,4 e 0,0%, intestínio 35,4 e 12,0%, vasos sanguíneos 3,5 e 4,6%, estruturas celulares superfícies 1,4 e 0%, lâmina 1,4 e 3,2%, artefatos 0,3 e 1,3%, respectivamente. Os ductos do epidídimo apresentaram forma circular em cortes transversais com espermatozoide apenas em novembro/2005 e dezembro/2006. A morfologia do epidídimo de Rhea foi semelhante ao avestruz, galo e codornas japonesas. Apresentamos dados de microscopia estereológica (diâmetro tubular, espessura do epitélio, diâmetro do lúmen), proporção volumétrica, em porcentagem (epitélio, lúmen sem espermatozóide, lúmen com espermatozoide, intestório, vasos sanguíneos, estruturas em superfícies celulares - cílio - estereocílio, lâmina e artefatos) nesta espécie nos períodos de repouso e atividade sexual (estação reprodutiva).

17.
Ciênc. rural (Online) ; 51(2): e20200237, 2021. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1142757

ABSTRACT

ABSTRACT: The objectives of this study were to evaluate the correlation of fetal sex and plasma testosterone concentrations between the 5th and 8th months of pregnancy in mares and to verify the applicability of this test to predict fetal sex. Blood samples were collected from 21 mares at 30-day intervals of between 150 and 240 days of pregnancy. Plasma testosterone was determined by radioimmunoassay and the sex of the foals confirmed at birth. The levels of maternal testosterone were higher in mares carrying female fetuses at months 5 and 8 (P < 0.05). Limit values were determined by analyzing the receiver operating characteristic (ROC) estimates: 35.5 pg/mL and 40 pg/mL for the 5th and 8th month, respectively. For the mares with plasma testosterone values equal to or above the threshold, gestation of female foals was predicted, and for those with plasma testosterone below the threshold values pregnancy of male foals was predicted. In the 5th month, the predictive values for male and female fetuses were 70% and 88.9%, respectively; the detection rates were 87.5% and 72.7%, and the total accuracy of the examination was 78.9%. In the 8th month, the predictive values for male and female fetuses were 80% and 90%, respectively; the detection rates were 88.9% and 81.8%, and the total accuracy of the examination was 85%. It was concluded that there was a correlation between fetal sex and plasma testosterone concentrations in pregnant mares. Prediction of fetal sex based on plasma concentrations of maternal testosterone can be performed in months 5 and 8 with 78.9% and 85% accuracy, respectively.


RESUMO: Os objetivos do estudo foram avaliar a correlação do sexo fetal com as concentrações plasmáticas de testosterona entre o 5° e o 8º mês de gestação na égua e verificar a aplicabilidade deste exame para a predição do sexo fetal. Amostras de sangue foram coletadas de 21 éguas, com intervalos de 30 dias, entre 150 e 240 dias de gestação. A testosterona plasmática foi determinada por radioimunoensaio e o sexo dos potros foi confirmado ao nascimento. Os valores de testosterona materna foram superiores nas éguas gestando fetos fêmeas aos cinco e oito meses (P< 0.05). Através da análise da curva ROC (receiver operating characteristic) foram determinados valores limites de 35,5 pg/mL e 40 pg/mL para o 5º e o 8° mês, respectivamente. Éguas com testosterona plasmática igual ou acima dos valores limites foram preditas como gestando fêmeas e éguas com testosterona plasmática abaixo dos valores limites foram preditas como gestando machos. Aos cinco meses, os valores preditivos para fetos machos e fêmeas foram 70% e 88,9%, respectivamente; as taxas de detecção foram 87,5% e 72,7% e a acurácia total do exame foi de 78,9%. Aos oito meses, os valores preditivos para fetos machos e fêmeas foram 80% e 90%, respectivamente; as taxas de detecção foram 88,9% e 81,8% e a acurácia total do exame foi de 85%. Conclui-se que houve correlação entre o sexo fetal e as concentrações de testosterona plasmática em éguas prenhes. A predição do sexo fetal baseada nas concentrações plasmáticas de testosterona materna pode ser realizada aos cinco e oito meses de gestação com 78,9% e 85% de acurácia, respectivamente.

18.
Article in Chinese | WPRIM | ID: wpr-873564

ABSTRACT

Objective To study the effect of metabolic syndrome on the fertility and reproduction in model animals. Methods The model of"high fat diet for spontaneously hypertensive rats(SHR)"was adopted to construct the model of metabolic syndrome in rats. The metabolic syndrome model rats were used to mate with male and female 1 : 1 cage, and the mating cycle was 2 weeks. Results After the SHR rats were fed a high-fat diet for 10 weeks, 16 males and 15 females met the screening criteria for metabolic syndrome, with the modeling rates of 40% and 37.5%, respectively. In addition to the abnormal metabolism-related indicators(such as blood glucose, blood lipid and blood pressure), the male rats with metabolic syndrome mainly had decreased sperm motility(P < 0.05), increased sperm malformation rate(P < 0.01), and decreased mating rate(P < 0.05). In addition to abnormal metabolism-related indicators, the conception rate and the live fetal rate of the female rats with metabolic syndrome were slightly lower than that of the control group; however, there was no statistical difference. The mean birth weight of the litter was significantly lower than that of the control group(P < 0.05). Conclusion According to the whole process from mating to natural production, metabolic syndrome is determined to have a significant effect on the fertility and reproductive ability of rats.

19.
Article in Chinese | WPRIM | ID: wpr-911374

ABSTRACT

Parathyroid hormone plays an important role in maintaining the homeostasis of calcium and phosphorus metabolism via acting on bone, kidney, and intestine. However, little is known about the effects of parathyroid diseases on the reproductive system. This article describes the association of parathyroid diseases with reproductive function and health.

20.
Article in Chinese | WPRIM | ID: wpr-907978

ABSTRACT

Objective:To investigate the effect of reproduction on maternal and infant outcomes in female patients with systemic lupus erythematosus (SLE).Methods:Clinical data of SLE patients complicated with pregnancy admitted in the Peking University People′s Hospital from July 2015 to December 2019 were analyzed retrospectively.According to the history of live birth, SLE patients complicated with pregnancy were divided into primiparity group (94 cases) and reproduction group (32 cases). Maternal and infant outcomes of the 2 groups were analyzed.Results:A total of 126 SLE patients complicated with pregnancy were included in the present study.The proportion of using immunosuppressants was significantly lower in reproduction group than that of primiparity group [3 cases (9.38%) vs.27 cases (28.72%)] ( χ2=4.927, P=0.026). Complications like lupus nephritis, thyroid disease and postpartum hemorrhage significantly increased in the reproduction group (all P<0.05), and the adverse neonatal outcomes like preterm infants, low birth weight infants and small for gestational age infants in the reproduction group were lower than those in primiparity group, but no significant differences were detected(all P>0.05). There were no significant diffe-rences in the results of the first blood routine examination of newborns and the incidence of neonatal pathological jaundice between the 2 groups (all P>0.05). Conclusions:For SLE patients complicated with reproductive pregnancy, although the incidence of some pregnancy complications increases, the incidence of adverse neonatal outcomes decreases.In addition, reducing the use of immunosuppressants may have positive implications on neonatal outcomes.

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