External morphology and biometry of newborn agouti (Dasyprocta prymnolopha, Wagler 1831) / Morfologia externa e biometria de neonates de cutias (Dasyprocta prymnolopha, Wagler 1831)

Morphological features are essential to assess neonates' viability. In order to characterize the morphology and biometry of newborn agouti, 36 animals born at 103 days of gestation under human care in Teresina-PI, Brazil were evaluated. After birth, the newborns were weighed on digital precision scales, measured with a flexible tape measure and their external morphology was assessed. The animals observed had coat color trait of adults, open eyes, hairs in the nasal region and four incisor teeth. The forelimbs had developed four digits and the hind limbs three digits, with white edged claws and a short hairless tail. The following were observed: weight of 144.58 ± 33.39g and lengths: crown-rump 14.73 ± 1.82cm, total 19.88 ± 1.52cm, head to tail 16.95 ± 1.55cm, head 7.33 ± 0.59cm, thoracic girth 11.78 ± 1.36cm, abdominal girth 10.73 ± 1.21cm, tail length 1.18 ± 0.25cm, eye diameter 1.27 ± 0.27cm and ear length 0.21 ± 0.35cm. The agoutis presented morphological maturity at birth with external morphology very similar to that of the adult animals. Most of the births in this species are the double type and newborns that weigh more than 90g have better chances of survival in captivity.

As características morfológicas são essenciais para avaliar a viabilidade dos neonatos. Para caracterizar a morfologia e biometria de cutias recém-nascidas, foram avaliados 36 animais nascidos aos 103 dias de gestação sob cuidados em Teresina-PI, Brasil. Após o nascimento, os recém-nascidos foram pesados em balança digital de precisão, medidos com fita métrica flexível e avaliada sua morfologia externa. Os animais observados apresentavam traço de pelagem de adultos, olhos abertos, pelos na região nasal e quatro dentes incisivos. Os membros anteriores desenvolveram quatro dedos e os membros posteriores três, com garras brancas afiadas e uma cauda curta e sem pêlos. Foram observados: peso de 144,58 ± 33,39g e comprimentos: garupa 14,73 ± 1,82cm, total 19,88 ± 1,52cm, cabeça a cauda 16,95 ± 1,55cm, cabeça 7,33 ± 0,59cm, perímetro torácico 11,78 ± 1,36cm, abdominal perímetro 10,73 ± 1,21 cm, comprimento da cauda 1,18 ± 0,25 cm, diâmetro do olho 1,27 ± 0,27 cm e comprimento da orelha 0,21 ± 0,35 cm. As cutias apresentaram maturidade morfológica ao nascimento com morfologia externa muito semelhante à dos animais adultos. A maioria dos nascimentos nesta espécie são do tipo duplo e recém-nascidos que pesam mais de 90g têm melhores chances de sobrevivência sob cuidados humanos.

Are recaptures of banded birds efficient at detecting altitudinal migrations in the Atlantic Forest?

Altitudinal migration in birds comprises seasonal movements between breeding and non-breeding areas in mountainous regions, attributed to biotic and abiotic factors. Different authors have suggested the existence of altitudinal migration between high and low areas of the mountains of the Atlantic Forest, with movement from high to low during the winter when birds would be fleeing the cold and in search of food, but there is no documented evidence. Through recaptures of understory birds, we investigated possible altitudinal migration in a region of the Atlantic Forest in Southeast Brazil. Twenty mist-nets were set at four locations between 15 and 729 m a.s.l. during 143 days of field work, distributed over 54 months and covering all seasons of the year. A total of 1946 birds (98 species) were captured/banded with 558 being recaptured (28.6%; 45 species). However, only 42 of the recaptures were at a different elevation. Most of the movements were of short distances and performed only once by birds, showing no seasonal pattern. These movements may be better interpreted as daily movements undertaken by birds of mixed-species flocks looking for food or moving around their respective home-ranges. Our results show that mist-nets may not be an effective tool in detecting altitudinal movements of birds and that other methods should be evaluated for this purpose.

New genus and new species in American Apomecynini (Coleoptera, Cerambycidae, Lamiinae)

Three new species and one new genus are described in Apomecynini: Adetaptera setigera sp. nov., from Mexico; Osckayia obrieni sp. nov., from Mexico; and Capaciphrynidius extensus, gen. nov., sp. nov., from Honduras.(AU)

Innovative use and efficiency test of subcutaneous transponders for electronic identification of water buffaloes.

The objective of this study was to evaluate the viability of using transponders for the electronic identification of water buffaloes and compare their efficiency when used in animals of different age groups. Electronic transponders with RFID technology (2.1 × 12.2 mm) were implanted subcutaneously (D0) in the scutiform cartilage. The animals consisted of four groups: CLF-I (17 calves; 2.1 ± 1.9 months), CLF-II (20 calves; 5.1 ± 3.2 months), HFR (20 heifers; 22 ± 4.7 months) and STR (19 steers; 26.6 ± 6.7 months). The animals were kept under pasture grazing, a part of the year in the dryland and a part in the floodplain, and were monitored for up to 350 days. The average time required for individual transponder implant was 49.46 s, while the time required for reading the code was 3.76 s. The older calves required higher time for individual implant (P = 0.0001) and closer approximation of the reader in the D150 (P = 0.0001). The mean read distance was 2.98 cm in D0 and 1.94 cm in D150. The magnitude of the subcutaneous transponder migration was minimal, and was within an area of 17.2 mm2. A slight bleeding was observed in 15.79% of the animals during the implant. A decreasing incidence of edema was observed until D21, with the heifers being more sensitive until that time (P = 0.0099). Considering the results, it is preferred to implant electronic transponders in calves up to two months of age. The physical rate of transponder loss was 1.3% and the loss of functionality was 9.2%. High reading rate was achieved when animals were raised both in dryland (93.9%) and floodplain (97.2%). Thus, the electronic identification of water buffaloes is a technique capable of replacing traditional and rudimentary methods to identify buffaloes and can provide safe identification of animals.

Margay (Leopardus wiedii) in the southernmost Atlantic Forest: Density and activity patterns under different levels of anthropogenic disturbance.

The margay (Leopardus wiedii) is a small Neotropical arboreal wild cat. This species is thought to be forest-dependent, although few studies so far have directly evaluated the relationships between spatiotemporal aspects of its ecology and landscape characteristics. The aim of this study was to estimate margay population density and activity patterns in six areas with different habitat types and levels of anthropogenic disturbance in the southernmost Atlantic Forest of Brazil. Our working hypothesis was that density and activity patterns differed between areas in response to differences in forest cover and anthropogenic disturbance. Margay records were obtained using camera trapping, during spring and summer from 2017 to 2019. In all areas, the sampling scheme consisted of 20 un-baited stations, set 1km apart, each containing two paired cameras. We assessed the potential effects of environmental variables, including anthropogenic factors, on margay density, rate of detection and space use by comparing nine spatial capture-recapture (SCR) models. Activity patterns of the margay, its potential prey, and competitors were described and compared using the date and time of the records. We obtained 66 records of margay. Two of the six sampled areas were excluded from subsequent analyses due to the small number of records. The density estimated by the top-ranked model varied from 9.6±6.4 individuals/100km2 in the area with the highest human disturbance to 37.4±15.1 individuals/100km2 in a less disturbed area. Margay densities responded positively to vegetation cover, supporting the hypothesis of forest dependence by the species. Both the margay and their potential prey (small rodents and marsupials) were found to be mostly nocturnal. Margay activity also overlapped with that of the ocelot, Leopardus pardalis, and with mammals associated with human presence (wild boar, cattle, domestic dogs and cats). This is the first multi-area study on patterns of density and activity of the margay in the Brazilian Atlantic Forest. We concluded that the margay is mostly nocturnal, and while its densities are positively influenced by forest cover and negatively influenced by human disturbance, the activity pattern of the species does not seem to change across landscapes with distinct levels of human modification. Margay populations seem to be able to persist under moderate levels of habitat modification, highlighting the importance of preserving even small native forest remnants in the highly fragmented Atlantic Forest.

Adoption of beef cattle traceability at farm level in São Paulo State, Brazil / Adoção da rastreabilidade de bovinos de corte no estado de São Paulo, Brasil

This paper aimed to identify the determinants of beef traceability adoption at farm level in São Paulo State, Brazil. A sample survey of 32 farmers who adopted the European Union certified traceability and 52 other farmers who did not adopt traceability provided data to test hypotheses on determinant factors. Three binomial logit models were used in the analysis. Results suggested that capital-intensive livestock production system, high scale production, access to specialized information and high level of human and social capital play significant role in the adoption decision.(AU)

O artigo tem como objetivo identificar os determinantes da adoção da rastreabilidade por pecuaristas no estado de São Paulo, Brasil. Uma amostra de 32 produtores que adotaram a certificação da rastreabilidade para a União Europeia e 52 que não adotaram a rastreabilidade forneceu dados para testar hipóteses a respeito de fatores determinantes. Três modelos logit binomial foram utilizados na análise. Os resultados sugerem que o sistema de produção pecuária intensiva, a elevada escala de produção, o acesso a informação especializada e a rede de relacionamentos desempenham papel significativo na decisão de adoção.(AU)

Ocurrence and identification of Istiophoridae larvae and Xiphiidae eggs off the Southeastern Brazilian coast / Ocorrência e identificação de larvas de Istiophoridae e ovos de Xiphiidae na costa sudeste brasileira

This study had the aim to identify and relat the occurrence of billfish larvae and eggs in the Southeastern coast of Brazil. During the summer in two seasons (2012/2013 and 2013/2014) 74 surface trawls were done using an ichthyoplankton net off the coast of Vitória-ES, Rio de Janeiro-RJ and Ilhabela-SP and 391 fish larvae were collected. The identification of the billfish larvae was done by molecular biology using the DNA barcode (COI gene). During the 2012/2013 season, five sailfish and two white marlin larvae were identified and in the 2013/2014 season, two sailfishes, two white marlin larvae and two swordfish eggs were identified. The occurrence of billfish larvae shall be further studied, so that inferences about the area and period of spawning and development of early life stages of these fish can be made more accurately.(AU)

O presente estudo teve como objetivo identificar e relatar a ocorrência de larvas e ovos de peixes-de-bico na costa sudeste do Brasil. Durante duas temporadas no verão (2012/2013 e 2013/2014) 74 arrastos de superfície foram feitos utilizando uma rede de ictioplâncton na costa de Vitória-ES, Rio de Janeiro-RJ e Ilhabela-SP, de modo que 391 larvas de peixes foram coletadas. A identificação das larvas de peixes-de-bico foi feita por biologia molecular utilizando o método do DNA barcode (gene COI). Durante a temporada de 2012/2013, foram identificados cinco larvas de agulhões-vela e duas de agulhão-branco. Na temporada 2013/2014, duas larvas de agulhões-branco e duas de agulhões-vela, além de dois ovos de espadarte foram identificados. A ocorrência de larvas de peixes-de-bico deve ser detalhadamente estudada, para que inferências sobre a área e período de desova e desenvolvimento das fases iniciais de vida destes peixes possam ser feitas com mais precisão.(AU)

Ocurrence and identification of Istiophoridae larvae and Xiphiidae eggs off the Southeastern Brazilian coast / Ocorrência e identificação de larvas de Istiophoridae e ovos de Xiphiidae na costa sudeste brasileira

This study had the aim to identify and relat the occurrence of billfish larvae and eggs in the Southeastern coast of Brazil. During the summer in two seasons (2012/2013 and 2013/2014) 74 surface trawls were done using an ichthyoplankton net off the coast of Vitória-ES, Rio de Janeiro-RJ and Ilhabela-SP and 391 fish larvae were collected. The identification of the billfish larvae was done by molecular biology using the DNA barcode (COI gene). During the 2012/2013 season, five sailfish and two white marlin larvae were identified and in the 2013/2014 season, two sailfishes, two white marlin larvae and two swordfish eggs were identified. The occurrence of billfish larvae shall be further studied, so that inferences about the area and period of spawning and development of early life stages of these fish can be made more accurately.

O presente estudo teve como objetivo identificar e relatar a ocorrência de larvas e ovos de peixes-de-bico na costa sudeste do Brasil. Durante duas temporadas no verão (2012/2013 e 2013/2014) 74 arrastos de superfície foram feitos utilizando uma rede de ictioplâncton na costa de Vitória-ES, Rio de Janeiro-RJ e Ilhabela-SP, de modo que 391 larvas de peixes foram coletadas. A identificação das larvas de peixes-de-bico foi feita por biologia molecular utilizando o método do DNA barcode (gene COI). Durante a temporada de 2012/2013, foram identificados cinco larvas de agulhões-vela e duas de agulhão-branco. Na temporada 2013/2014, duas larvas de agulhões-branco e duas de agulhões-vela, além de dois ovos de espadarte foram identificados. A ocorrência de larvas de peixes-de-bico deve ser detalhadamente estudada, para que inferências sobre a área e período de desova e desenvolvimento das fases iniciais de vida destes peixes possam ser feitas com mais precisão.

Technical efficiency and economic viability of different cattle identification methods allowed by the Brazilian traceability system / Eficiência técnica e viabilidade econômica de diferentes métodos de identificação de bovinos permitidos pelo sistema de rastreabilidade brasileiro

We aimed to evaluate the technical efficiency and economic viability of the implementation and use of four cattle identification methods allowed by the Brazilian traceability system. The study was conducted in a beef cattle production system located in the State of Mato Grosso, from January to June 2012. Four identification methods (treatments) were compared: T1: ear tag in one ear and ear button in the other ear (eabu); T2: ear tag and iron brand on the right leg (eaib); T3: ear tag in one ear and tattoo on the other ear (eata); and T4: ear tag in one ear and electronic ear tag (eael) on the other. Each treatment was applied to 60 Nelore animals, totaling 240 animals, divided equally into three life stages (calves, young cattle, adult cattle). The study had two phases: implementation (phase 1) and reading and transfer of identification numbers to an electronic database (phase 2). All operating expenses related to the two phases of the study were determined. The database was constructed, and the statistical analyses were performed using SPSS® 17.0 software. Regarding the time spent on implementation (phase 1), conventional ear tags and electronic ear tags produced similar results, which were lower than those of hot iron and tattoo methods, which differed from each other. Regarding the time required for reading the numbers on animals and their transcription into a database (phase 2), electronic ear-tagging was the fastest method, followed by conventional ear tag, hot iron and tattoo. Among the methods analyzed, the electronic ear tag had the highest technical efficiency because it required less time to implement identifiers and to complete the process of reading and transcription to an electronic database and because it did not exhibit any errors. However, the cost of using the electronic ear-tagging method was higher primarily due to the cost of the device.(AU)

Objetivou-se avaliar a eficiência técnica e a viabilidade econômica da implantação e utilização de quatro métodos de identificação de bovinos, permitidos pelo sistema de rastreabilidade brasileiro. A pesquisa foi realizada em um sistema de produção de gado de corte, localizado no Estado de Mato Grosso, de janeiro a junho de 2012. Foram comparados quatro métodos de identificação (tratamentos): T 1: brinco auricular em uma orelha e botton auricular na outra (brbo); T 2: brinco auricular e marca a fogo na perna direita (brmf); T 3: brinco auricular em uma orelha e tatuagem na outra (brta); T 4: brinco auricular em uma orelha e brinco eletrônico (arruela eletrônica auricular) (brde) na outra. Cada tratamento foi aplicado em 60 animais da raça Nelore, totalizando 240 animais, igualmente divididos em três categorias animais (bezerros, novilhos e vacas adultas). A pesquisa teve duas fases: implantação (fase 1) e leitura dos números de identificação e sua transferência para um banco de dados eletrônico (fase 2). Foram levantadas todas as despesas operacionais referentes às duas fases da pesquisa. A construção do banco de dados e as análises estatísticas foram realizadas utilizando o software SPSS® 17.0. Quanto ao tempo gasto na implantação (fase 1), o brinco convencional e a arruela eletrônica auricular apresentaram resultados semelhantes, e menores que o ferro quente e tatuagem, que apresentaram tempos diferentes entre si. No que diz respeito ao tempo necessário para leitura dos números dos animais, bem como a sua transcrição para um banco de dados (fase 2), foi verificado que a arruela auricular eletrônica foi o mais rápido, seguido pelo brinco convencional, ferro quente e tatuagem...(AU)

Technical efficiency and economic viability of different cattle identification methods allowed by the Brazilian traceability system / Eficiência técnica e viabilidade econômica de diferentes métodos de identificação de bovinos permitidos pelo sistema de rastreabilidade brasileiro

We aimed to evaluate the technical efficiency and economic viability of the implementation and use of four cattle identification methods allowed by the Brazilian traceability system. The study was conducted in a beef cattle production system located in the State of Mato Grosso, from January to June 2012. Four identification methods (treatments) were compared: T1: ear tag in one ear and ear button in the other ear (eabu); T2: ear tag and iron brand on the right leg (eaib); T3: ear tag in one ear and tattoo on the other ear (eata); and T4: ear tag in one ear and electronic ear tag (eael) on the other. Each treatment was applied to 60 Nelore animals, totaling 240 animals, divided equally into three life stages (calves, young cattle, adult cattle). The study had two phases: implementation (phase 1) and reading and transfer of identification numbers to an electronic database (phase 2). All operating expenses related to the two phases of the study were determined. The database was constructed, and the statistical analyses were performed using SPSS® 17.0 software. Regarding the time spent on implementation (phase 1), conventional ear tags and electronic ear tags produced similar results, which were lower than those of hot iron and tattoo methods, which differed from each other. Regarding the time required for reading the numbers on animals and their transcription into a database (phase 2), electronic ear-tagging was the fastest method, followed by conventional ear tag, hot iron and tattoo. Among the methods analyzed, the electronic ear tag had the highest technical efficiency because it required less time to implement identifiers and to complete the process of reading and transcription to an electronic database and because it did not exhibit any errors. However, the cost of using the electronic ear-tagging method was higher primarily due to the cost of the device.

Objetivou-se avaliar a eficiência técnica e a viabilidade econômica da implantação e utilização de quatro métodos de identificação de bovinos, permitidos pelo sistema de rastreabilidade brasileiro. A pesquisa foi realizada em um sistema de produção de gado de corte, localizado no Estado de Mato Grosso, de janeiro a junho de 2012. Foram comparados quatro métodos de identificação (tratamentos): T 1: brinco auricular em uma orelha e botton auricular na outra (brbo); T 2: brinco auricular e marca a fogo na perna direita (brmf); T 3: brinco auricular em uma orelha e tatuagem na outra (brta); T 4: brinco auricular em uma orelha e brinco eletrônico (arruela eletrônica auricular) (brde) na outra. Cada tratamento foi aplicado em 60 animais da raça Nelore, totalizando 240 animais, igualmente divididos em três categorias animais (bezerros, novilhos e vacas adultas). A pesquisa teve duas fases: implantação (fase 1) e leitura dos números de identificação e sua transferência para um banco de dados eletrônico (fase 2). Foram levantadas todas as despesas operacionais referentes às duas fases da pesquisa. A construção do banco de dados e as análises estatísticas foram realizadas utilizando o software SPSS® 17.0. Quanto ao tempo gasto na implantação (fase 1), o brinco convencional e a arruela eletrônica auricular apresentaram resultados semelhantes, e menores que o ferro quente e tatuagem, que apresentaram tempos diferentes entre si. No que diz respeito ao tempo necessário para leitura dos números dos animais, bem como a sua transcrição para um banco de dados (fase 2), foi verificado que a arruela auricular eletrônica foi o mais rápido, seguido pelo brinco convencional, ferro quente e tatuagem...

Adoption of beef cattle traceability at farm level in São Paulo State, Brazil / Adoção da rastreabilidade de bovinos de corte no estado de São Paulo, Brasil

This paper aimed to identify the determinants of beef traceability adoption at farm level in São Paulo State, Brazil. A sample survey of 32 farmers who adopted the European Union certified traceability and 52 other farmers who did not adopt traceability provided data to test hypotheses on determinant factors. Three binomial logit models were used in the analysis. Results suggested that capital-intensive livestock production system, high scale production, access to specialized information and high level of human and social capital play significant role in the adoption decision.

O artigo tem como objetivo identificar os determinantes da adoção da rastreabilidade por pecuaristas no estado de São Paulo, Brasil. Uma amostra de 32 produtores que adotaram a certificação da rastreabilidade para a União Europeia e 52 que não adotaram a rastreabilidade forneceu dados para testar hipóteses a respeito de fatores determinantes. Três modelos logit binomial foram utilizados na análise. Os resultados sugerem que o sistema de produção pecuária intensiva, a elevada escala de produção, o acesso a informação especializada e a rede de relacionamentos desempenham papel significativo na decisão de adoção.