Perfil metabólico de Aegla platensis Schmitt, (Crustacea, Aeglidae, Anomura) submetida a dietas ricas em carboidratos ou proteínas

Abstract

O objetivo desse estudo foi avaliar o efeito de uma dieta rica em carboidratos e uma dieta rica em proteínas sobre o metabolismo de Aegla platensis, um caranguejo anomuro de água doce. Os animais foram coletados no Arroio do Mineiro, município de Taquara, Rio Grande do Sul, em agosto/2002 e janeiro/2003, e foram alimentados durante 15 dias com carne bovina crua e arroz branco, em aquários aerados. O fotoperíodo foi controlado: 12 horas claro - 12 horas escuro. Glicose, proteínas, lipídios e triglicerídios foram dosados na hemolinfa; glicogênio e lipídios foram dosados no hepatopâncreas, brânquias e músculo. Em Aegla platensis, mantida em condições de laboratório, em todos os tecidos estudados pode ser observado que o aporte regular de alimento, bem como o tipo de dieta administrada determinaram um perfil diferenciado de resposta metabólica entre os sexos e o período de realização dos experimentos (inverno e verão).

Biochemical composition, lipoperoxidation, Na+/K+ATPase activity and reproduction of Hyalella castroi (amphipoda, dogielinotidae) fed with different diets

“…The levels of glycogen and total lipids observed in these amphipods on both diets were similar to the levels observed in other crustaceans fed protein-rich diets (Kucharski and Da Silva, '91a;Ferreira et al, 2005). The results may suggest that amphipods have a higher protein content in their natural diets, and that this diet is more generalized.…”

“…Diet 1 contained 43.19 g/100 g of carbohydrates and Diet 2 contained 28.99 g/100 g. Studies on other crustaceans, such as C. granulata (Kucharski and Da Silva, '91a), A. platensis (Ferreira et al, 2005) and P. brasiliensis (Dutra et al, 2008d), have shown that increased carbohydrate in the diet changes the homeostasis of glycogen compared with animals that receive a high-protein diet, causing an increase in the levels of this polysaccharide.…”

Seasonal variations in the intermediate metabolism of the crayfish Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae) in the natural environment and experimental culture

“…Comparing glycogen and glucose in all tissues examined, for the animals both in the stream and the tank, we observed levels up to 10 times lower than those found in other species of crustaceans (KUCHARSKI & DA SILVA, 1991a, 1991bOLIVEIRA et al, 2001OLIVEIRA et al, , 2003FERREIRA et al, 2005). However, the levels of total lipids and triglycerides remained high similar to other crayfishes, which may suggest that in these animals, lipids are a very important energy reserve.…”

Characterization of oxidative stress biomarkers in a freshwater anomuran crab

“…Aegla genus presents habitat variety and important role in energy transfer in the food chain (Ferreira et al, 2005;Oliveira et al, 2007). Thus, this genus may function as a good bioindicator of environmental quality (Bond-Buckup and Buckup, 1994;Trevisan et al, 2009).…”

“…Aegla genus have been studied in relation to several aspects, including seasonal variations in intermediate metabolism (Oliveira et al, 2007), sexual maturity and mating behavior (Oliveira and Santos, 2011;Almerão et al, 2010), metabolic (Ferreira et al, 2005;Oliveira et al, 2003) and intracellular osmoregulatory profile (Faria et al, 2011). Besides, speciation and intraspecific morphological variation (Hepp et al, 2012;Marchiori et al, 2014), behavior (Palaoro et al, 2014), cardiac morphology (Castro and Bond-Buckup, 2003) and embryonic development (Lizardo-Daudt and Bond- were also evaluated in this genus.…”