Dynamics of Production Characteristics of Polar Cod Boreogadus saida (Gadidae) in the Barents Sea
| Autor: | O. V. Karamushko, E. V. Raskhozheva |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Boreogadus saida 010604 marine biology & hydrobiology Aquatic Science Biology Gadidae biology.organism_classification 01 natural sciences Animal science Age groups Fish Polar General Agricultural and Biological Sciences 0105 earth and related environmental sciences |
| Zdroj: | Journal of Ichthyology. 58:732-740 |
| ISSN: | 1555-6425 0032-9452 |
| DOI: | 10.1134/s0032945218050181 |
| Popis: | The somatic and generative production and the P/B-coefficient of polar cod Boreogadus saida of the Barents Sea were calculated using a long-term dataset (1969–2013). It has been found that the main contribution to the production in 1969–1978 was made by the individuals aged 1+–4+, while that in a later period was by the fish aged 1+–2+; the share of somatic production varied from 54 to 94%. In 1986–2013, a decrease in generative production was observed in all age groups. The intensity of production processes increased in 1969–2004 and declined in 2005–2008 and in 2013. The average annual P/B-coefficient of the polar cod varied from 0.62–1.10, which was significantly lower than the hypothetical expert value (1.5). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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