Food consumption and energy transformations by fish populations in two small lowland rivers in Poland
✍ Scribed by T. Penczak; E. Kusto; D. Krzyżanowska; M. Moliński; E. Suszycka
- Book ID
- 104613754
- Publisher
- Springer
- Year
- 1984
- Tongue
- English
- Weight
- 564 KB
- Volume
- 108
- Category
- Article
- ISSN
- 1573-5141
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✦ Synopsis
The food consumption of all fish species was estimated at nine sites in two lowland rivers . The fish populations, whose diet consisted chiefly of invertebrates (88%), used on the average 9 .88 (7 .14-13 .3) kg of invertebrates for the production of 1 kg of fish flesh . This number of invertebrates corresponds to 39 .35 ± 7 .34 MJ (x ± S .D .) . In estimating the effective use of consumed (K 1 ) and assimilated (K 2 ) food for growth, it was found that the predominance of food of animal origin over plant of detrital food resulted in a decrease in the living cost (maintenance ration) of fish .