Feed preferences of Salminus brasiliensis (Pisces, Characidae) larvae in fish ponds |
| |
| Authors: | Daniela Flávia Orísia Ribeiro |
| |
| Institution: | Laboratório de Biologia e Cultivo de Peixes de Água Doce, Universidade Federal de Santa Catarina, Departamento de Aqüicultura, Rodovia SC 406, 3532, Florianópolis, Santa Catarina, CEP 88066-000, Brazil |
| |
| Abstract: | Feed preferences of dorado, Salminus brasiliensis, in the early stages of life was studied in larvae, stocked 5 days after hatching in three earthen commercial ponds (810 m2, 900 m2 and 1480 m2) at a density of 30 m− 2. Larvae were fed on natural food from ponds supplemented with a commercial ration (40% crude protein), and for 12 days fish samples were taken daily in the morning and in the afternoon from each pond to analyze the food items present in the diet. Zooplankton available in the environment was also analyzed. Feeding was intensive since 94% of the larvae guts examined contained food. Since the commercial diet was not found in the dorado guts, the natural diet dominated the artificial food, but the cannibalistic behavior typically found in laboratory conditions was not observed. Insect larvae and cladocerans were the main prey items found in the gut of the larvae. In fish ponds dorado larvae can be considered a generalist feeder, since small amounts of different food items were consumed, but they tend to specialize in some items, according to their developmental stage. |
| |
| Keywords: | Salminus brasiliensis Larvae Natural food Fish ponds Dorado |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
