Data/hora: 10/06/2024 10:14:37

Provedor de dados: | 2
País: | Brazil
Título: | Ammonia excretion at different life stages of silver catfish - 10.4025/actascianimsci.v34i1.11898
Autores: | Garcia, Luciano de Oliveira; Universidade Federal do Rio Grande; Braun, Neiva; Universidade Federal de Santa Catarina; Becker, Alexssandro Geferson; Universidade Federal de Santa Maria; Loro, Vania Lúcia; Universidade Federal de Santa Maria; Baldisserotto, Bernardo; Universidade Federal de Santa Maria.
Data: | 2011-11-01
Ano: | 2011
Palavras-chave: | 5.06.03.04-3 eggs; Fasting time; Nitrogenous compound; Larvae.
Resumo: | This study examined ammonia excretion at different life stages (eggs, larvae and juveniles) in silver catfish (Rhamdia quelen) and determined the influence of fasting time on ammonia excretion. Eggs and larvae were collected from incubators at different times after fecundation and placed in chambers. Juveniles were separated into two weight classes (2–50 g and 150-320 g) and placed in individual chambers after feeding. Water was collected from each chamber to determine ammonia excretion. Ammonia excretion by the eggs was low, but when hatching began approximately 28h after fecundation, excretion increased until 48h after fecundation. In fasting silver catfish juveniles, there was a significant negative correlation between ammonia excretion and weight. Moreover, ammonia excretion decreased significantly after 12 and 48h of fasting (compared to 6h fasting) in the smallest and largest specimens, respectively. Consequently, during incubation of silver catfish eggs, water renovation must be increased at hatching time to avoid a build-up in the concentration of ammonia. In addition, as ammonia excretion in this species increases after feeding, feed must be discontinued when ammonia levels in the tanks are high to avoid a further increase of this metabolite and consequent mortality of silver catfish.
Tipo: | Análise laboratorial
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/11898

10.4025/actascianimsci.v34i1.11898

Editor: | Editora da Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/downloadSuppFile/11898/44605

Formato:

application/pdf

application/pdf

Fonte:

Acta Scientiarum. Animal Sciences; v. 34, n. 1 (2012); 15-19

Acta Scientiarum. Animal Sciences; v. 34, n. 1 (2012); 15-19

Fonte:

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DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS  Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Animal Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).