Ecological fish production in the inland delta of the Middle Danube, a floodplain river

Ecological fish production in one parapotamal arm of the Middle Danube inland delta in Slovakia was studied. Results of 10 samplings over 5 consecutive years showed total production (P sub(T)) to range from 349 kg ha super(-1) to 3,272 kg ha super(-1) and available production to range from 39 kg ha...

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Published in:Environmental biology of fishes 1996-06, Vol.46 (2), p.151-165
Main Author: HOLCIK, J
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
Pisces
Synecology
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description Ecological fish production in one parapotamal arm of the Middle Danube inland delta in Slovakia was studied. Results of 10 samplings over 5 consecutive years showed total production (P sub(T)) to range from 349 kg ha super(-1) to 3,272 kg ha super(-1) and available production to range from 39 kg ha super(-1) to 662 kg ha super(-1). Young-of-the-year fish accounted for an estimated 49-62% of total fish produced. The food production/food consumption budget was calculated and showed less than half of P sub(T) to be of autochthonous origin; most derives from other sources. Conclusions included that ecological fish production in rivers fluctuates considerably; the hydrological regime is the primary factor influencing such production in floodplain rivers; and sampling must occur in different seasons and years if results are to be representative.
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subjects Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
Pisces
Synecology
title Ecological fish production in the inland delta of the Middle Danube, a floodplain river
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