Food composition and selectivity in ide (Leuciscus idus) fry in pond culture
2000
Adamek, Z. (Jihoceska Univ., Pohorelice (Czech Republic). Vyzkumny Ustav Rybarsky a Hydrobiologicky) | Sukop, I.
Food biology of ide (Leuciscus idus) fry was studied under pond farming conditions during summer 1997. Ide sac fry was stocked in biculture with 1+ common carp (Cyprinus carpio) in densities corresponding to 1.23 - 1.6 million larvae per hectar. Crushed wheat mixed with blood meal was the main food item of ide fry, amounting to 87 % of the whole gut content. Among natural food items, periphyton (4.6 %), detritus (2.8 %) and macrophyte debris (2.4 %) were the most frequent. Animal food was represented particularly by crustaceoplankton (1.4 %), chironomid larvae (1.6 %) and terrestrial insects (0.3 %). Phytophilous larvae prevailed among chironomids but the large benthic species Chironomus plumosus was ingested up to size corresponding to 25-31 fish TL.
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