dc.contributor.author | Gjøsæter, Jakob | |
dc.date.accessioned | 2009-01-08T12:49:46Z | |
dc.date.issued | 1981 | |
dc.identifier.uri | http://hdl.handle.net/11250/114508 | |
dc.description.abstract | Age, growth, mortality, production and reproduction were studied on material of Benthosema
glaciale from some fjords of western Norway and from the adjacent ocean. Samples were collected
using pelagic trawls and Icaacs-Kidd midwater trawls.
Age was studied by means of otoliths although the seasonal cycle of zone formation was
variable. Growth was highly variable within the material, L∞ of the von Bertalanffy's growth
equation ranging from 70 to 87 mm and K from 0.19 to 0.46.
The instantaneous natural mortality was about 0.7. The maximum sustainable yield per recruit
can be obtained with a first age of capture of about 2 years and a fishing mortality of 1.5 or higher.
B. glaciale reaches maturity at an age of 2 or 3 years and spawn mainly during summer. The
development of the ovaries is briefly described. Its mean fecundity is 700 eggs/female. | |
dc.format.extent | 1177547 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 17 no 3 | en |
dc.title | Growth, production and reproduction of the myctophid fish Benthosema glaciale from western Norway and adjacent seas | en |
dc.type | Research report | en |
dc.source.pagenumber | s. 79-108 | en |