ABSTRACT
Abstract The Australian red-claw crayfish, Cherax quadricarinatus, has been introduced for aquaculture purposes worldwide and consequently colonized natural environments, where it might cause ecosystem services losses or adversely affect native species and the local environment. This species was first found in Pequenos Libombos Reservoir in Maputo Province, Southern Mozambique in the late 2009 and is linked to reduction in tilapia fisheries. This study, conducted in 2015 under controlled conditions, aimed to assess the interspecific relationships between the Mozambique tilapia (Oreochromis mossambicus) and the alien crayfish. For both species, no significant differences in growth and survival rates were found between animals reared in the presence versus the absence of heterospecifics, indicating no direct deleterious interspecific effects. Behavioural observations revealed that fish and crayfish competed for shelter and food. Both species reduced the foraging in the presence of heterospecifics during feeding period, in the daytime. Crayfish seemed to have an advantage in competition for shelter, suggesting that they may interfere with tilapia sheltering activity and make tilapia vulnerable to predators in natural habitats.
Resumo O lagostim australiano, Cherax quadricarinatus, tem sido introduzido para fins de aquicultura em todo o mundo e, consequentemente, colonizado ambientes naturais, onde pode coexistir com a biota local sem causar perdas nos serviços dos ecossistemas ou afetar negativamente as espécies nativas e o meio ambiente local. Esta espécie foi encontrada pela primeira vez na Albufeira dos Pequenos Libombos, na Província de Maputo, sul de Moçambique, no final de 2009 e foi relacionada à redução da pesca de tilápias registrada na mesma localidade. Este estudo, conduzido em 2015 sob condições controladas, teve como objetivo avaliar as relações interespecíficas entre a tilápia de Moçambique (Oreochromis mossambicus) e o lagostim invasor (C. quadricarinatus). Para ambas espécies, não foram encontradas diferenças significativas nas taxas de crescimento e sobrevivência entre animais criados na presença versus ausência de heteroespecíficos, indicando ausência de efeitos deletérios interespecíficos diretos. Observações comportamentais revelaram que peixes e lagostins competiam por abrigo e comida. Ambas espécies reduziram o forrageamento na presença de heteroespecíficos durante o período de alimentação, no período diurno. O lagostim parece ter uma vantagem na competição por abrigos, sugerindo que, em habitats naturais eles podem provocar o deslocamento de tilápias de seus abrigos, e deste modo tornar as tilápias vulneráveis aos predadores.
Subject(s)
Animals , Tilapia , Astacoidea , Australia , Ecosystem , AquacultureABSTRACT
Abstract The Australian red-claw crayfish, Cherax quadricarinatus, has been introduced for aquaculture purposes worldwide and consequently colonized natural environments, where it might cause ecosystem services losses or adversely affect native species and the local environment. This species was first found in Pequenos Libombos Reservoir in Maputo Province, Southern Mozambique in the late 2009 and is linked to reduction in tilapia fisheries. This study, conducted in 2015 under controlled conditions, aimed to assess the interspecific relationships between the Mozambique tilapia (Oreochromis mossambicus) and the alien crayfish. For both species, no significant differences in growth and survival rates were found between animals reared in the presence versus the absence of heterospecifics, indicating no direct deleterious interspecific effects. Behavioural observations revealed that fish and crayfish competed for shelter and food. Both species reduced the foraging in the presence of heterospecifics during feeding period, in the daytime. Crayfish seemed to have an advantage in competition for shelter, suggesting that they may interfere with tilapia sheltering activity and make tilapia vulnerable to predators in natural habitats.
Resumo O lagostim australiano, Cherax quadricarinatus, tem sido introduzido para fins de aquicultura em todo o mundo e, consequentemente, colonizado ambientes naturais, onde pode coexistir com a biota local sem causar perdas nos serviços dos ecossistemas ou afetar negativamente as espécies nativas e o meio ambiente local. Esta espécie foi encontrada pela primeira vez na Albufeira dos Pequenos Libombos, na Província de Maputo, sul de Moçambique, no final de 2009 e foi relacionada à redução da pesca de tilápias registrada na mesma localidade. Este estudo, conduzido em 2015 sob condições controladas, teve como objetivo avaliar as relações interespecíficas entre a tilápia de Moçambique (Oreochromis mossambicus) e o lagostim invasor (C. quadricarinatus). Para ambas espécies, não foram encontradas diferenças significativas nas taxas de crescimento e sobrevivência entre animais criados na presença versus ausência de heteroespecíficos, indicando ausência de efeitos deletérios interespecíficos diretos. Observações comportamentais revelaram que peixes e lagostins competiam por abrigo e comida. Ambas espécies reduziram o forrageamento na presença de heteroespecíficos durante o período de alimentação, no período diurno. O lagostim parece ter uma vantagem na competição por abrigos, sugerindo que, em habitats naturais eles podem provocar o deslocamento de tilápias de seus abrigos, e deste modo tornar as tilápias vulneráveis aos predadores.
ABSTRACT
"Continent cutaneous reservoirs after cystectomy remain an invaluable treatment option for a well-defined subset of indications. The continence mechanism largely determines the treatment success in terms of patient satisfaction and quality of life. Any dysfunction is considered a failure by both patients and surgeons. A retrospective study was made from 2003 to 2013 (13 years) with the aim to characterize the hydraulic valve dysfunction in patients who underwent a cystectomy with continent urinary pouch. A total of ten patients were included in this study. The main age was 44 years. The indications of cystectomy were pelvic tumors (62%); vesico-vaginal fistulas (20%); bladder extrophy (10%); hypospadias (4%) and complicated uretral strictures (4%). An hydraulic continent valve according the Benchekroun process was made for all our patients. After a median follow-up of 36 months; the main related efferent segment complications were fistulas in the top of the valve or ""pinhole fistula"" in 25% of cases; the externalized prolapse of disinserted valve in 25% of cases; and the progressive desinvagination with urinary incontinence in 50% of cases Continent catheterizable urinary diversion remains a treatment option for a well-defined subset of indications. There is little consensus regarding the different options for the efferent segment; which has the greatest influence on patient satisfaction."
Subject(s)
Cystectomy , Quality of Life , Retrospective Studies , Urinary Diversion/physiopathologyABSTRACT
Le seminome spermatocytaire est une tumeur rare; representant moins de 2des cancers du testicule; survenant essentiellement chez le sujet age. Nous rapportons une nouvelle observation d'un patient age de 48 ans. La tumeur se presentait comme une proliferation de cellules en nappes compactes; avec 3 types cellulaires; des cellules de petite taille; des cellules intermediaires et des grandes cellules. Il n'a ete retrouve ni contingent sarcomateux; ni seminome classique. L'analyse en immun histochimie n'a retrouve aucune expression des cellules tumorales pour les anticorps classiques testes; notamment l'Ac anti PLAP et les marqueurs lymphoides. Le seminome spermatocytaire doit etre reconnu; car son evolution est tres favorable et ne necessite qu'une simple orchidectomie; en l'absence d'un exceptionnel contingent sarcomateux ou de metastase ou une chimiotherapie s'impose
Subject(s)
Middle Aged , Seminoma , Testicular NeoplasmsABSTRACT
La migration intravesicale du dispositif intra-uterin (DIU) par perforation uterine est une complication rare. Dans cette etude retrospective monocentrique; nous presentons notre experience de 5 cas colliges au sein de notre etablissement entre 2004 et 2009. L'age moyen de nos patientes est de 39 ans (32-48 ans). La symptomatologie clinique revelatrice etait dominee par le syndrome irritatif vesical. Le diagnostic a ete evoque sur le couple echo/AUSP; puis confirme par la cystoscopie. Le traitement a consiste en une lithotritie balistique du calcul avec extraction du sterilet par voie endoscopique chez 4 patientes et extraction chirurgicale chez une seule