Environment: the key to understanding the South African chokka squid (Loligo vulgaris reynaudii) life cycle and fishery?

This paper explores effects of environmental variability on the life cycle of the chokka squid, Loligo vulgaris reynaudii in South Africa, particularly the effect of physical and chemical influences on adult distribution, and the availability of spawning aggregations to the local jig fishery. The fo...

Full description

Saved in:
Bibliographic Details
Published in:Antarctic science 1994-06, Vol.6 (2), p.249-258
Main Authors: Roberts, M.J., Sauer, W.H.H.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Biological and medical sciences
Demecology
Fundamental and applied biological sciences. Psychology
Loligo vulgaris reynaudii
Marine
Protozoa. Invertebrata
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper explores effects of environmental variability on the life cycle of the chokka squid, Loligo vulgaris reynaudii in South Africa, particularly the effect of physical and chemical influences on adult distribution, and the availability of spawning aggregations to the local jig fishery. The following hypotheses are presented: 1) temperature, dissolved oxygen and currents have a direct effect on the demersal distribution of adult chokka on the feeding grounds, but this is restricted to the west coast where environmental conditions are more extreme relative to the south coast, 2) chokka catches increase in proportion to the extent of coastal upwelling, 3) spawning behavior along the inshore regions (
ISSN:0954-1020
1365-2079
DOI:10.1017/S0954102094000386