Functional response of Ameca splendens (Family Goodeidae) fed cladocerans during the early larval stage
Por:
Pena-Aguado, F, Nandini, S, Sarma, SSS
Publicada:
30 sep 2009
Categoría:
Aquatic Science
Resumen:
We studied the functional response of the goodeid Ameca splendens, an endangered species from rivers Ameca and Teuchitlan (Jalisco, Mexico), from birth until 8 weeks old. The cladocerans, Alona glabra adults, Simocephalus vetulus neonates, Ceriodaphnia dubia adults, Daphnia pulex juveniles and Moina macrocopa adults were used as prey. The prey densities, depending on the species, ranged between 0.25, 0.5, 1.0, 2.0, 4.0, 6.0, 8.0, 16.0 and 32 ind. mL-1, with four replicates at each density. We found that all functional responses were Type II. During the feeding period of 30 min, the fish larvae consumed about 600 individuals of the smallest prey A. glabra (450 mu m). The consumption of larger prey (< 1.0 mm) such as S. vetulus, C. dubia, D. pulex and M. macrocopa ranged between 150 and 200 prey larva-1 during the feeding trials. Our study shows that A. splendens reached maximal prey consumption at around 4 weeks of age, after which there was no increase in prey consumption during the fe
Filiaciones:
Pena-Aguado, F:
Univ Nacl Autonoma Mexico, Postgrad Studies Marine Sci & Limnol PCMyL, Mexico City 04510, DF, Mexico
Nandini, S:
Univ Nacl Autonoma Mexico, Div Invest & Postgrad Studies, Lab Aquat Zool, Tlalnepantla 54090, Edo De Mex, Mexico
Sarma, SSS:
Univ Nacl Autonoma Mexico, Div Invest & Postgrad Studies, Lab Aquat Zool, Tlalnepantla 54090, Edo De Mex, Mexico
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