The trouble with estuarine fisheries in temperate South Africa, illustrated by a case study on the Sundays Estuary

摘要: This study provides empirical data on the exploitation of fishery resources Sundays Estuary south-east coast South Africa. Total annual effort was estimated at 63 785 angler-hours, which accounted for an yield 16 214 fish (8.0 t). Effort and mean catch per unit exhibited seasonal trends were highest during summer. Dusky kob Argyrosomus japonicus spotted grunter Pomadasys commersonnii most commonly targeted species bulk catch: 3.4 t (43% gravimetrically, 22% numerically) 1.9 (24% gravimetrically respectively. The smaller-bodied Cape stumpnose Rhabdosargus holubi contributed only 0.2 (0.03%); however, it 30.1% numerically important to minority subsistence sector. Overall, sustainability estuarine is questionable due high proportions juvenile in angler catches, retention rates juveniles, targeting towards ...