К методике определения абсолютного запаса балтийского шпрота.
The attempt was made to determine total stock of sprat in the Baltic Sea without use of fishery statistics and data on age composition. Total eggs abundance in subdivision 26 was determined according to the results of ichthyoplankton survey. The total sprat stock of this area was determined according to total eggs abundance, sprat fecundity, the ratio of males and females, and the ratio of spawning females. The relative sprat stock in the Baltic Sea subdivisions was determined from the materials of trawl counting survey made in May. Total absolute stock of Baltic sprat for subdivisions 25, 26, 28, 29, 32, that made up 6.0 million centners for the beginning of 1977 was calculated from the correlation of relative sprat stock in subdivisions and absolute stock in subdivision 26.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
1980
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| Subjects: | Baltic sprat, Ichthyoplankton surveys, Total eggs abundance, Relative sprat stock, Absolute sprat stock, ASFA_2015::F::Fish stocks, ASFA_2015::F::Fish eggs, |
| Online Access: | http://hdl.handle.net/1834/15839 |
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