Recruitment and distribution of North-East Arctic saithe in relation to changes in the environment
Conference object
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http://hdl.handle.net/11250/107505Utgivelsesdato
1987Metadata
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- Symposium proceedings [168]
Sammendrag
The stocks of North-East Arctic saithe and Arctic cod have responded in a
similar way to the period of cold climate in the Barents Sea 1976 - 1982. Since
a relationship with the climate has been established for Arctic cod, a
relationship with the climate als0 for North-East Arctic saithe is indicated.
Time series of recruitment, landings, and catch per unit of effort were
compared with historic data on the climate. The results showed little evidence
of relationships. A concurrence of poor recruitment in all North-East Atlantic
saithe stocks 1974-1977 coincided with a period of extreme low salinities in the
Faroe-Shetland Channel, indicating that the recruitment may suffer in years
with reduced inflow of Atlantic water. Although little other evidence of a
relationship with the climate is found, the lack of a close stock-recruitment
relationship reveals that environmental factors affect the recruitment of the
North-East Arctic saithe, but the nature of these factors are mostly unknown.
The feeding area and therefore probably als0 the availability of food appears
to be more stable for saithe than for cod. It is suggested that this may be
the evolutionary basis for the relatively small variation in year class
abundance for saithe compared to cod.
Beskrivelse
The effect of oceanographic conditiond on disrtibution and population dynamics of commerical fish stocks in the Barents Sea. Proceedings of the third Soviet-Norwegian Symposium. Murmansk, 26-28 May 1986.
Serie
PINRO-IMR Symposium3