The ways for increasing of fish productivity of the Gulf of Riga
The aim of the measures for increasing the abundance of food-fish in the Gulf of Riga (Baltic Sea) and for amelioration of exploitation of their food reserves should be a reduction of the tension in the food base of the plankton-eating fish and an increase in the abundance of benthos-eating species. It is beneficial to suppress the abundance of planktivorous stickleback and gobies. Also, it is important to: (1) increase (by artificial reproduction) the abundance of valuable species of local ichthyofauna - vimba bream, pike-perch and whitefish; (2) improve the conditions of natural reproduction of migratory cyprinids by ameliration of their natural spawning grounds and creation of artificial spawning places in the lower reaches of rivers, first of all in the Daugava River; (3) plant young rainbow trout (it has high growth rate in brackish water) for fattening into the Gulf of Riga; (4) acclimatize valuable commercial fish species from other water bodies. As a result of the measures listed the share of food reserves utilized by valuable fish species in the Gulf of Riga would increase and the commercial productivity of the gulf would improve.
| Main Authors: | , , , , , |
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| Format: | Book/Monograph/Conference Proceedings biblioteca |
| Language: | Russian |
| Published: |
Baltijskij Nauchno-issledovatelskij Institut Rybnogo Khozyajstva; "Zvaigzne"
1966
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| Subjects: | Bream, Pike-perch, Whitefish, ASFA_2015::F::Fishery resources, ASFA_2015::I::Ichthyofauna, ASFA_2015::C::Commercial species, |
| Online Access: | http://hdl.handle.net/1834/43190 |
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