ВПЛИВ ТЕМПЕРАТУРИ ВОДИ НА ВИЖИВАННЯ МОЛОДІ І ФОРМУВАННЯ ПРОМИСЛОВОГО ЗАПАСУ ЧОРНОМОРСЬКОГО ШПРОТУ SPRATTUS SPRATTUS PHALERICUS (RISSO) (PISCES: CLUPEIDAE)
The influence of water temperature on survival rate of early age groups of the Black Sea sprat and formation of its fishing stocks was studied. The relative number of yearlings in the population was used to estimate the survival rate of juveniles in different generations (annual classes). The exampl...
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| Date: | 2023 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Marine Ecological Journal
2023
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| Subjects: | |
| Online Access: | https://mej.od.ua/index.php/mej/article/view/657 |
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| Journal Title: | Marine Ecological Journal |
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Marine Ecological Journal| Summary: | The influence of water temperature on survival rate of early age groups of the Black Sea sprat and formation of its fishing stocks was studied. The relative number of yearlings in the population was used to estimate the survival rate of juveniles in different generations (annual classes). The example taken for four generations (1998 – 1999, 1999 – 2000, 2000 – 2001, 2001 – 2002) revealed close correlation between relative number of yearlings and mean surface water temperature in February of previous year (r2 = +0,98). The correlation between size of sprat stocks, which mainly constitute from representatives of two-year class, and water temperature in the period of their early ontogenesis was not found. The yield of the generations is the main determinative factor forming sprat stock and catches, correspondingly. |
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