Body condition indices for Brycon amazonicus (Spix & Agassiz, 1829) e Colossomoma macropomum (Cuvier, 1818) in Amazon
Keywords:
Brycon amazonicus, Colossoma macropomum, condition factor, hepatosomatic index, splenosomatic indexAbstract
A study comparing the relative condition factor (Kn), splenosomatic index (SSI) and hepatosomatic index (HSI) was carried out in juveniles of Brycon amazonicus (matrinxã) and Colossomoma macropomum (tambaqui). Individuals of both B. amazonicus and C. macropomum, ranging from 18.0 to 38.0 g and 14.0 to 79.0 g respectively, were provided by the Department of Aquaculture, National Research Institute of the Amazon (INPA, Manaus, Brazil). The Kn was very similar and varied from 0.90 to 1.10 for B. amazonicus and from 0.79 to 1.25 for C. macropomum. The splenosomatic index was higher (p<0.05) in C. macropomum than in B. amazonicus, while for the HSI no significant difference (p>0.05) was found between the two fish species. Positive relationship regarding spleen and liver weight to body mass was observed for C. macropomum. However, this relationship was not found for spleen weight to body mass of B. amazonicus, indicating a species-specific pattern. The Kn, SSI and HSI of C. macropomum and B. amazonicus suggest that both species presented good health condition. Therefore, it is recommended the use of these indices as indicators of the health condition for other fish species that have not been studied.
References
DALMO, R.A.;IGEBREGSTSEN, K.; BOGWALD, J.1997 Non-specific defence mechanisms in fish, with particular reference to the reticuloendothelial system (RES). Journal of Fish Diseases, Stirling 20:241-273.
FROESE, R. 2006 Cube law, condition factor and weight-length relationship: history, metaanalysis and recommendations. Journal Applied of Ichthyology, Berlin, 22: 241-253.
GALLAUGHER, P. e FARREL, A. P. 1998 Hematocrit e blood oxygen-carrying capacity In: PERY, S.F; TUFTS, B. Fish respiratory. New York: Academic Press. Cap. 6p, p. 185-227.
GERMAM, A.V. e KOZLOVSKAYA, V.I. 2001 Hepatosomatic index e the biochemical composition of the liver in Abramis brama in the Sheksna Stretch of the Rybinsk reservoir at different levels of toxicant accumulation. Journal of Ichthyology, New
Yok, 41:160-163.
GOMIERO, L. M. e BRAGA, F.M.S. 2003 Relação pesocomprimento e fator de condição para Cichla cf. ocellaris e Cichla monoculus (Perciformes, Cichlidae)no reservatório de Volta Grande, Rio Grande- MG/SP. Acta Scientiarum, Maringá, 25: 79-86.
ITUASSíÅ¡, D.R.; SANTOS, G.R.S; ROUBACH, R.;PEREIRA-FILHO, M. 2004 Desenvolvimento de tambaqui submetido a períodos de privação alimentar. Pesquisa Agropecuária Brasileira, Brasília,39: 1199-1203.
LE CREN, E.D. 1951 The length-weight relationship and seasonal cycle in gonadal weight and condition in the perch (Perca fluviatilis). Journal of Animal Ecology, New York, 20: 201-219.
LIZAMA, M.A.P. e AMBRÓSIO, A.M. 2002 Condition factor in nine species of fish of the Characidae Family in the upper Paraná River floodplain,Brazil. Brazilian Journal of Biology, São Carlos,62: 113-124.
RANZANI-PAIVA, M.J.T. e TAVARES-DIAS, M.2002 Eritrograma, relação viscerosomática, hepatosomática e esplenosomática em tainhas Mugil
platanus (Osteichthyes: Mugilidae) parasitadas.Revista Brasileira de Zoologia, Curitiba, 19: 807-818.
TAVARES-DIAS, M. 2004 Características biométricas de Brycon amazonicus e Brycon orbignyanus (Characidae) oriundos de cultivo intensivo no Brasil. CIVA 2004 (http://civa2004.org), 286-289. Disponível em: http://www. civa2004.org/poncencias. Acesso em 19 dez. 2004.
TAVARES-DIAS, M. e MORAES, F.R. 2004 Hematologia de peixes teleósteos. 1ª ed. Ribeirão Preto, São Paulo.144p.
TAVARES-DIAS, M. e MATAQUEIRO, M.I. 2004 Características hematológicas, bioquímicas e biométricas de Piaractus mesopotamicus Holmberg, 1887 (Osteichthyes: Characidae) oriundos de cultivo intensivo. Acta Scientiarum, Maringá, 26:157-162.
TAVARES-DIAS, M.; MARTINS, M.L.; MORAES, F.R. 2000a Relação hepatosomática e esplenosomática em peixes teleósteos de cultivo intensivo. Revista Brasileira de Zoologia, Curitiba, 17: 273-281.
TAVARES-DIAS, M.; MARTINS, M.L.; MORAES, F.R.;KRONKA, S.N. 2000b Fator de condição e relação hepato e esplenossomática em teleósteos de água doce naturalmente parasitados. Acta Scientiarum,Maringá, 22:533-537.
VAINIKKA, A.; JOKINEN, E.I.; KORTET, R.; PAUKKU,S.; PIRHONEN, J.; RANTALA, M. J.; TASKINEN, J. 2005 Effects of testosterone e β -glucan on immune functions in tench. Journal of Fish Biology, London,66: 348í 361.
VILLACORTA-CORREA, M.A. e SAINT-PAUL, U.1999 Structural indexes e sexual maturity of tambaqui Colossoma macropomum (Cuvier, 1818) (Characiformes: Characidae), in central Amazon, Brazil. Brazilian Journal of Biology, São Carlos, 59:
637-652.
YAMAMOTO, K.I. e SHIMA, T. 1990 Relationship of spleen to body weight before and after contraction in a teleost fish Oreochomis niloticus. Comparative Biochemistry and Physiology, New York, 96A:107-108.
