Indication of high natural mortality for juvenile herring from acoustic and tagging data.

Natural mortality for juvenile herring (Norwegian Spring spawners) is discussed on the basis of following data: 1. Acoustic estimates of the 1975 and 1976 yearclasses of herring as 0-group and estimates from tagging data of these yearclasses as 4 year old fish. 2. Acoustic abundance estimates of the...

Full description

Bibliographic Details
Main Author: Røttingen, Ingolf
Format: Report
Language:English
Published: ICES 1980
Subjects:
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922
Lavangen
Norway
Northern Norway
Online Access:http://hdl.handle.net/11250/103617
Description
Summary:Natural mortality for juvenile herring (Norwegian Spring spawners) is discussed on the basis of following data: 1. Acoustic estimates of the 1975 and 1976 yearclasses of herring as 0-group and estimates from tagging data of these yearclasses as 4 year old fish. 2. Acoustic abundance estimates of the 1978 herring yearclass in Lavangen fjord, Northern Norway. These data indicate a high natural mortality for juvenile herring.

Similar Items