Некоторые аспекты питания личинок балтийских рыб
Comparisons have been made between the food compositions and feeding peculiarities of larval sprat, cod, flounder, hake, sand eel, and sand goby of a length of 4 to 22 mm in spring and summer. According to the body shape, structure of digestive tract, size of mouth opening, and feeding and movement patterns, the larvae fall into 2 groups: the larvae of group I (sprat, sand eel) differ from those of group II by a stretched body, narrow alimentary tract, small mouth opening, and they are less mobile. The larvae of group II are smaller when they begin to feed upon large food items, and percentage of feeding individuals in this group is higher. Food diversity of sprat is low, and this species is highly sensitive to the food deficiency. Feeding intensity differ between the seasons. The food spectrum of fishes is wider in July than in May and June. The food-selective indices have been calculated for larval fish.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
1989
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| Subjects: | Larval sprat, Larval cod, Larval flounder, Larval hake, Larval sand eel, Larval sand goby, ASFA_2015::F::Fish larvae, ASFA_2015::F::Fish food organisms, ASFA_2015::S::Selective feeding, |
| Online Access: | http://hdl.handle.net/1834/9809 |
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| Summary: | Comparisons have been made between the food compositions and feeding peculiarities of larval sprat, cod, flounder, hake, sand eel, and sand goby of a length of 4 to 22 mm in spring and summer. According to the body shape, structure of digestive tract, size of mouth opening, and feeding and movement patterns, the larvae fall into 2 groups: the larvae of group I (sprat, sand eel) differ from those of group II by a stretched body, narrow alimentary tract, small mouth opening, and they are less mobile. The larvae of group II are smaller when they begin to feed upon large food items, and percentage of feeding individuals in this group is higher. Food diversity of sprat is low, and this species is highly sensitive to the food deficiency. Feeding intensity differ between the seasons. The food spectrum of fishes is wider in July than in May and June. The food-selective indices have been calculated for larval fish. |
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