A method to estimate the annual larval production of the Norwegian spring-spawning herring (Clupea harengus L.)
Working paper
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http://hdl.handle.net/11250/105683Utgivelsesdato
1997Metadata
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This report is not to be cited without prior reference to the authorsSammendrag
A comprehensive survey in the larval distribution area of Norwegian spring-spawning
herring along the Norwegian west coast was carried out annually by
the Institute of Marine Research, Bergen in the years 1986-1990. Moreover, two
small subareas were sampled repeatedly (usually twice a week) off Sunnmøre
and at Buagrunnen throughout the hatching period each year. The daily larval
production was worked out with the data obtained from the comprehensive
survey covering the entire larval distribution area. Data obtained in the subareas
had been used to construction the hatching curve so as to get the daily larval
production percentage in the hatching period. Then, the annual larval
productions were estimated.