A Social Cost-benefit Analysis of a Small-scale Clam Fishery in the Eastern Cape, South Africa

Sims-Castley, Rebecca; Hosking, Stephen

doi:10.2989/18142320309504006

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…There are seven licensed, small-scale commercial fisheries operating in the Western Cape that harvest the white mussel Donax serra. However, this species is probably underutilised, because there is only a very small South African market for beach clams (Sims-Castley and Hosking 2003). Broadly speaking, surf zones are well protected from exploitation because of the improved regulation of launch sites, reduced access because of a ban on beach driving, and a fairly well-enforced MPA network.…”

Section: Sandy Shoresmentioning

confidence: 99%

Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa

Mead

Griffiths

Branch

et al. 2013

African Journal of Marine Science

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The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden.

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Section: Sandy Shoresmentioning

confidence: 99%

Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa

Mead

Griffiths

Branch

et al. 2013

African Journal of Marine Science

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“…Murray-Jones and Steffe (2000) estimated that for a commercially exploited species on a 32-km-long beach in Australia (Caraguatatuba is 16 km long and the study area where the activity is concentrated was 4 km long), 46.5 tons/year was taken by recreational harvesters. On the Eastern Cape of South Africa, the sustainable amount of the clam Donax serra harvested for commercial exploitation was estimated at 100 tons/year (Sims-Castley and Hosking 2003).…”

Section: Estimate Of the Amount Of Clams Harvestedmentioning

confidence: 99%

Population Structure, Growth, and Production of the Wedge ClamDonax hanleyanus(Bivalvia: Donacidae) from Northern Argentinean Beaches

Herrmann

Carstensen

Fischer

et al. 2009

Journal of Shellfish Research

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“…Clams are exploited for bait and food and might be a valuable aquaculture species with their unique and delicate taste showing rapid growth and high densities (Donn, 1987;McLachlan, 1996). Based on an economic evaluation Sims-Castley and Hosking (2003) calculated a possible price range between US$6.50-60.00/kg for export markets. Morphological studies on Donacidae indicated high interspecific (Ansell, 1985;Nelson et al, 1993;McLachlan et al, 1995) and intraspecific (Wade, 1967;Nelson et al, 1993) variation.…”

Section: Introductionmentioning

confidence: 99%

Genetic and morphological variation in four populations of the surf clam Donax serra (Röding) from southern African sandy beaches

Laudien

Flint²,

Bank³

et al. 2003

Biochemical Systematics and Ecology

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The surf clam Donax serra (Bivalvia, Donacidae) dominates sandy-beach communities of two southern African biogeographical regions, a cold (Benguela current) and warm province (Agulhas current). Morphometric and behavioural differences led to a controversial discussion of whether or not populations from the two provinces belong to the same species. Shell size measurements confirmed morphological differences: clams from the cold province were significantly rounder, flatter and less wedge-shaped than clams from the warm province. In this study a genetic approach was used to relate phenotypic differences to genetic variability of four populations of D. serra separated by up to 2500 km of shoreline. Genetic analysis of 22 protein-coding loci was carried out by starch-gel electrophoresis. Populations studied are conspecific (genetic distances range from 0.003 to 0.044) and possess genetic variation (alleles per locus: 1.73-1.91; mean heterozygosity: 18-22%; percentage polymorphism: 45.5-59.1%) in the range of most other marine bivalves, which allows for potential adaptation to environmental changes. Wright's fixation indices show little to moderate genetic divergence among the subpopulations relative to the limiting amount under complete fixation (F ST = 0.016-0.089), moderate divergence of individuals relative to the total population (F IS = 0.265-0.452), and comparably high divergence of individuals relative to the compound population (F IT = 0.300-0.473). The effective number of individuals exchanged between populations in each generation is high enough (1. 44-8.65) to counteract genetic drift. We propose that the observed differences represent phenotypic plasticity enabling this species to inhabit * Corresponding author.

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A Social Cost-benefit Analysis of a Small-scale Clam Fishery in the Eastern Cape, South Africa

Cited by 7 publications

References 20 publications

Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa

Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa

Population Structure, Growth, and Production of the Wedge ClamDonax hanleyanus(Bivalvia: Donacidae) from Northern Argentinean Beaches

Genetic and morphological variation in four populations of the surf clam Donax serra (Röding) from southern African sandy beaches

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