On the Reasons of Correlation Between Recruitment Dynamics of Some Commercial Fish Populations in the Northwestern Atlantic Ocean (NAFO Subareas 2-4) and Probability of Forecasting the Trends in Dynamics of Their Biomass for Several Years Ahead
The comparative analysis of recruitment dynamics of nine commercial fish populations (stock units) and water temperature in the Northwestern Atlantic (NAFO Subareas 2-4) has been carried out. It was found that the occurrence of weak generations in seven populations (2J+3KL, 3NO, 4VxW cod, 3LNO Ameri...
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| Format: | Text |
| Language: | English |
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2002
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.523.6975 http://archive.nafo.int/open/sc/2002/scr02-001.pdf |
| Summary: | The comparative analysis of recruitment dynamics of nine commercial fish populations (stock units) and water temperature in the Northwestern Atlantic (NAFO Subareas 2-4) has been carried out. It was found that the occurrence of weak generations in seven populations (2J+3KL, 3NO, 4VxW cod, 3LNO American plaice, 4TVW haddock, 4VWX+5Zc pollock, 4VWX silver hake) coincided with the periods of strong and rather long fall of temperatures, while in two populations (2J+3KLMNO Greenland halibut, 3LNO yellowtail flounder) the inverse process was observed. The assumption was made, that the reason of reliable correlation between recruitment dynamics of stock units under consideration was the identical (or opposite) reaction to interannual fluctuations of water temperature. The attempt was made to obtain the general idea on the trends of fishing and spawning biomass dynamics of respective populations during the first decade of the new century. |
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