dc.contributor.author | Wiborg, Kristian Fredrik | |
dc.date.accessioned | 2008-11-19T10:04:21Z | |
dc.date.issued | 1957 | |
dc.identifier.uri | http://hdl.handle.net/11250/114564 | |
dc.description.abstract | 1. The quantitative occurrence of eggs and larvae of the Arcto-Norwegian
cod in the coastal and bank areas of northern Norway during
the years 1948-1956 has been studied.
2. There is no correlation between the abundance of eggs and larvae
and the relative strength of the corresponding year classes of cod in the
commercial catches.
3. There is no increased mortality at any stage in the early life
history of the cod.
4. The following conditions seem to be of importance for establishing
a rich year class: a) a long spawning period, b) a proloilged hatching or
spawning late in season, c) an extention or northward displacement of
the spawning centre, d) a successful transport of the eggs and larvae
from the spawning area to the nursery grounds by currents.
These conditions seem more or less to be fullfilled for the year
classes 1948-1950, which now dominate the commercial catches in the
Barents Sea and adjacent areas. | |
dc.format.extent | 974495 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | en |
dc.publisher | [Fiskeridirektoratets havforskningsinstitutt] | en |
dc.relation.ispartofseries | Fiskeridirektoratets skrifter, Serie Havundersøkelser | en |
dc.relation.ispartofseries | vol 11 no 8 | en |
dc.title | Factors influencing the Size of the Year Classes in the Arcto-Norwegian Tribe of Cod | en |
dc.type | Research report | en |
dc.source.pagenumber | 24 s. | en |