MIGRATIONS OF THE CAPE HAKE OR STOCKFISH (<i>MERLUCCIUS CAPENSIS</i>CAST.) ON THE WEST COAST OF SOUTH AFRICA

Roux, E. R.

doi:10.1080/00359194909519860

Cited by 7 publications

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“…Inshore migrations by the Cape hakes in Namibian waters have been described by several workers (see review by Gordoa et al, 1995), whereby in spring and summer mature hake move shorewards to spawn. A similar seasonal migratory pattern was reported for hake populations off the west coast of South Africa (Roux, 1949), but that theory was based on an incorrect premise that a one-species hake stock existed (Payne and Punt, 1995). Seasonal inshore/offshore migrations have not been clearly established locally for M. capensis (Botha, 1973), although it is thought likely that M. paradoxus move offshore in winter and inshore in summer.…”

Section: Discussionmentioning

confidence: 72%

Diel variability in bottom trawl catches and feeding activity of the Cape hakes off the west coast of South Africa

Barangé¹

1997

ICES Journal of Marine Science

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Pillar, S. C., and Barange, M. 1997. Diel variability in bottom trawl catches and feeding activity of the Cape hakes off the west coast of South Africa. -ICES Journal of Marine Science, 54: 485-499.The diel variability in bottom trawl catches and the feeding patterns of the Cape hakes Merluccius capensis and M. paradoxus were investigated during thirteen 28-h experiments in winter and summer between 1984 and 1990 within the same locality off the west coast of South Africa. Considerable variation was found in the diel differences in the catches, but day-time numbers and mass were generally greater than at night. Catch rates of M. capensis were significantly different in nine experiments whereas five experiments yielded significant differences in M. paradoxus. For small hake, especially M. paradoxus, euphausiids were eaten more frequently in summer and mesopelagic fish were of more dietary importance in winter. Hake-on-hake predation was a prominent feature in M. capensis, especially in summer when larger fish were caught at the study site. In the majority of cases, the size composition of M. capensis was not significantly different between the day and night catches. By contrast, diel size differences were generally found in M. paradoxus, but with no consistent pattern. There was little indication of any diel feeding periodicity in either hake species, with up to one-third of the hake examined with food in their stomachs having recently fed, regardless of time of day or night. The diet composition indicated that hake move into midwater at night in response to similar movement of their prey. International Council for the Exploration of the Sea

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Section: Discussionmentioning

confidence: 72%