Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Composition and abundance of deep-water crustaceans in the Southwest Indian Ocean: enough to support trawl fisheries?
Everett, B.I.; Groeneveld, J.C.; Fennessy, S.T.; Dias, N.; Filipe, O.; Zacarias, L.; Igulu, M.; Kuguru, B.; Kimani, E.; Munga, C.N.; Rabarison, G.A.; Razafindrakoto, H.; Yemane, D. (2015). Composition and abundance of deep-water crustaceans in the Southwest Indian Ocean: enough to support trawl fisheries? Ocean Coast. Manag. 111: 50-61. https://dx.doi.org/10.1016/j.ocecoaman.2015.04.003
In: Ocean & Coastal Management. Elsevier Science: Barking. ISSN 0964-5691; e-ISSN 1873-524X, meer
|  |
| Trefwoorden |
|
| Author keywords |
Abundance index, Standardized CPUE, Crustaceans, Teleosts, Catch composition, Southwest Indian Ocean, Nominal biomass, Fisheries management, Shared resources, Trawl surveys |
| Auteurs | | Top |
- Everett, B.I.
- Groeneveld, J.C.
- Fennessy, S.T.
- Dias, N.
- Filipe, O.
|
- Zacarias, L.
- Igulu, M.
- Kuguru, B.
- Kimani, E.
|
- Munga, C.N.
- Rabarison, G.A.
- Razafindrakoto, H.
- Yemane, D.
|
| Abstract |
Expanding coastal fisheries into deeper waters is frequently tabled as an option to increase harvests from the sea in the Southwest Indian Ocean. In this region, only Mozambique and South Africa have established deep-water trawl fisheries for mixed crustaceans. To investigate the fishery potential of deep shelf waters over a broader geographical extent, four bottom trawl surveys were undertaken, in Madagascar, Mozambique, Tanzania and Kenya, respectively, in 2011–2012. Teleosts dominated catches in all surveys (59–74% of total catches) and depths. Crustaceans made up 15% of the catch in Mozambique and Madagascar, but only 6% in Kenya and Tanzania, where elasmobranchs (18%) and other invertebrates (11–15%) were more abundant. A generalized linear model was constructed to quantify the effects of country, depth and day/night on the abundance of four common crustacean species. Abundance of Haliporoides triarthrus and Metanephrops mozambicus declined from south (Madagascar, Mozambique) to north (Kenya, Tanzania), but Heterocarpus woodmasoni was more abundant in Madagascar, Tanzania and Kenya. Chaceon macphersoni and H. triarthrus abundance increased up to 600 m depth, whereas M. mozambicus and H. woodmasoni peaked shallower, at 350–500 m. Crustacean catch composition in Mozambique was strikingly similar to commercial landings in eastern South Africa, supporting a distinct sub-region for fisheries management, but differed markedly across the Mozambique Channel. Deep-water crustaceans were less abundant in Kenya and Tanzania, with limited commercial appeal. New deep-water trawl fisheries will have to contend with significant teleost bycatch. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
