Resumo
The total protein and ammonia contents in the hemolymph of Bradybaena similaris (Fèrussac, 1821) during the starvation were determined from August, 1996 to March, 1998. The results revealed a significant variation in the total protein content throughout the period of starvation analized, there being a negative relation between the total protein content and the time of starvation. But the same result was not observed in the ammonia content. After 30 days of starvation there was a reduction of 2,8% of the content of ammonia in the hemolymph. A negative relation between the ammonia content and the time of starvation was observed, but this relation was not significative. It is probable that the degradation of the proteins don't lead to an increase of the ammonia in the hemolymph of the snail. It indicates that the increase on the nitrogenous products of degradation, caused by the degradation of the proteins, is detoxified as urea or uric acid.
Bradybaena similaris; ammonium; nitrogenous products; starvation; total proteins
Bradybaena similaris; ammonium; nitrogenous products; starvation; total proteins
Influência do jejum severo sobre o conteúdo de proteínas totais e de amônio na hemolinfa de Bradybaena similaris (Fèrussac) (Mollusca, Gastropoda, Xanthonychidae)
Influence of the starvation on the total proteins and ammonia contents in the hemolymph of Bradybaena similaris (Fèrussac) (Gastropoda)
Claudia R.S. de LiraI; Edna M. GomesII; Generoso M. ChagasII; Jairo PinheiroII
ICurso de Pós-graduação em Ciências Biológicas, Universidade Federal Rural do Rio de Janeiro
IIDepartamento de Ciências Fisiológicas, Instituto de Biologia, Universidade Federal Rural do Rio Janeiro. BR 465, Km 7, 23890-000 Seropédica, Rio de Janeiro, Brasil. E-mail: jpinheirosilva@bol.com.br ou jps@ufrrj.br
ABSTRACT
The total protein and ammonia contents in the hemolymph of Bradybaena similaris (Fèrussac, 1821) during the starvation were determined from August, 1996 to March, 1998. The results revealed a significant variation in the total protein content throughout the period of starvation analized, there being a negative relation between the total protein content and the time of starvation. But the same result was not observed in the ammonia content. After 30 days of starvation there was a reduction of 2,8% of the content of ammonia in the hemolymph. A negative relation between the ammonia content and the time of starvation was observed, but this relation was not significative. It is probable that the degradation of the proteins don't lead to an increase of the ammonia in the hemolymph of the snail. It indicates that the increase on the nitrogenous products of degradation, caused by the degradation of the proteins, is detoxified as urea or uric acid.
Key words:Bradybaena similaris, ammonium, nitrogenous products, starvation, total proteins
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AGRADECIMENTO. À Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), pelo suporte financeiro (Processo E-26/150.122/99).
Recebido em 09.IX.1999; aceito em 26.IX.2000.
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Datas de Publicação
-
Publicação nesta coleção
30 Abr 2009 -
Data do Fascículo
Dez 2000
Histórico
-
Recebido
09 Set 1999 -
Aceito
26 Set 2000