| Title | South Coast Demersal Biomass Survey on the Africana Voyage 135, April 1996 |
|---|---|
| Authors |
Japp, D Sims, P |
| Publisher | Department of Forestry, Fisheries and the Environment (2026) |
| Contributors |
Contact Person: Tutt, Gavin Project Leader: Lamont, Tarron |
| Abstract | The South Coast Demersal Biomass Survey was conducted on the Africana Voyage 135 from 10 April to 2 May 1996. The primary objective of the cruise was to conduct a stratified bottom trawl survey to assess the biomass, abundance and distribution of hake, sole, horse mackerel, squid and other trawl species on the Agulhas Bank; to investigate the hydrology and current profiles of the South Coast and to relate this to the distribution of the major demersal trawl species, including five transects extending from specified areas on the South Coast approximately perpendicular to the coastline out towards the main stream of the Agulhas Current, as well as a mini-CTD transect grid in the Cape St Francis area; to conduct routine biological and length frequency sampling of the catch (specifically hake, squid, panga, sole, sharks and rays); to sample the catches for hake sex ratios, gonad stages and frequency of frill on gill; to sample hake from trawls in specific areas for histological evaluation of gonads state (Merluccius paradoxus and M. capensis); to sample for squid and other fish eggs and larvae using oblique bongo nets and to conduct gut evacuation experiments; to sample for fish larvae in the Tsitsikamma Reserve area; and to sample the substrate and trawls for the collection of molluscs. |
| Data | |
| Temporal extent | 10 Apr 1996 – 02 May 1996 |
| Geographic extent |
Agulhas Current Large Marine Ecosystem
North: -33.5 |
| Keywords | Africana , INDIAN OCEAN , OCEANS , South Coast Demersal Biomass Survey |
| Related resources |
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