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- W2105609917 abstract "Two-day-old post hatch Heterobranchus longifilis larvae (4.06 ± 0.1 mm, 2.75 ± 0.06 mg and 0.35 ± 0.03 mm average standard length, weight and mouth width, respectively) were introduced into glasswares and exposed to a wide range of live zooplankton (prey size range: 42 to 876 µm) at a density of 2,944 individual/larva/day for 14 days. The 180 guts examined showed that food intake changed markedly with age and size. Larger preys were preferred as larvae increased in age and size. Chilodonella uncinata and Lepadella ovalis (size range: 42 - 125 µm) dominated the larval gut from day 2 - 4 post hatch. Brachionus quadridentatus, Alona monachanta and Chydorus sphaericus (225 - 346 µm) were predominant at days 5 and 6, while Asplanchna priodonta, Bosmina longirostrisand Daphnia ambigua (485 - 876 µm) dominated from day 7 - 14 post hatch. Results from another 146 stomachs batch revealed that 2 to 4 day old post hatch fry preyed on larger prey (225 - 876 µm) at disproportionate mouth-width to prey ratio from 1: 1.2 to 2 when solely introduced and adequate. Initial recognition of prey by 2 - 4 day old larvae was longer but thereafter feeding became more voracious and intermittent with shorter resting periods compared with older larvae. Active feeding in H. longifilis larvae decreased with age while the length of feeding and rest period increased with age. Key words: Prey selection, behaviour, Heterobranchus longiflis, exogenous." @default.
- W2105609917 created "2016-06-24" @default.
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- W2105609917 date "2010-03-31" @default.
- W2105609917 modified "2023-09-28" @default.
- W2105609917 title "Prey selection and predation behaviour of Heterobranchus longifilis Val. (1840) larvae during first exogenous feeding" @default.
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- W2105609917 doi "https://doi.org/10.5897/ajfs.9000241" @default.
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