کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2424897 1105328 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feed preferences of Salminus brasiliensis (Pisces, Characidae) larvae in fish ponds
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Feed preferences of Salminus brasiliensis (Pisces, Characidae) larvae in fish ponds
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 274, Issue 1, 31 January 2008, Pages 65–71
نویسندگان
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