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Título: Effects of experimental anemia on intraerythrocytic phosphate levels in rainbow trout, Oncorhynchus mykiss (Walbaum)
Autor(es): Adalberto Luis Val
Carl F Mazur
Roberto Huet de Salvo Souza
George Iwama
Assunto: Anemia
Fosfatos Eritrocitários
ISSN: 0022-1112
Revista: Journal of Fish Biology
Volume: 45
Resumo: The concentrations of intra-erythrocytic adenylates (ATP, ADP and AMP) and guanylates (GTP, GDP and GMP) were determined in rainbow trout subjected to 10% blood removal every 12 h for 96 h. Haemoglobin concentration, [Hb], decreased from 6·043±0·617 to 0·957 ± 0·195 g dl−1. This decrease in [Hb] was followed by a continuous increase in total organic phosphates, e.g. adenylates plus guanylates. Intra-erythrocytic NTP (ATP plus GTP) levels increased significantly after 48 h when haemoglobin concentration was 2·427 ± 0·256 g dl−1. Although a significant increase in GDP levels in animals with [Hb] less than 1·677 ± 0·235 g dl−1 was observed, the general increase in guanylate level was mainly due to the GMP which increased about 85-fold during the experimental period. It is suggested that the erythrocytes of anaemic rainbow trout have the capacity to increase NTP/Hb4 ratios which may represent an advantage for anaemic fish.
ISSN: 0022-1112
Local de publicação: Inglaterra
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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