An evaluation of participation in and management of the South African spearfishery

Mann, BQ; Scott, Gabe; Mann, Judy; Brouwer, S. L.; Lamberth, Stephen J.; Sauer, W. H. H.; Erasmus, Colette

doi:10.2989/025776197784161144

Cited by 33 publications

(30 citation statements)

References 4 publications

(6 reference statements)

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“…Nowadays, spearfishing generally involves the use of a rubber propelled or airgun spear, as well as associated diving gear such as mask, snorkel and fins (Frisch et al 2008). In South Africa the recreative spearfishing has grown at an annual rate of 6.14% (Mann et al 1997). Spear fishing is an activity that frequently overlaps with fishing areas of the commercial and artisanal fleets (Coll et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Reef fishes captured by recreational spearfishing on reefs of Bahia State, northeast Brazil

et al. 2012

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Reef fishes captured by recreational spearfishing on reefs of Bahia State, northeast Brazil. Biota Neotrop. 12(1): http:// www.biotaneotropica.org.br/v12n1/en/abstract?article+bn02012012012Abstract: Although recreational spearfishing is a growing activity, its impacts are poorly understood. This paper aims to present data on reef fishes captured by recreational spearfishing in the Bahia State, Northeastern Brazil. We analyzed 168 photos of spearfishing conducted in the reefs of this region between 2006 and 2008. A total of 1.121 fish belonging to 48 species were captured in three sub-regions of the Bahia coastline: Litoral Norte (LN), Salvador (SSA) and Baixo Sul (BS). The main species caught were: Scomberomorus brasiliensis (n = 191), Sphyraena barracuda (n = 153), Lutjanus jocu (n = 150) and Caranx bartholomaei (n = 141); these four species represented 56.5% of total captures. Over the sampling period, the highest values of catch rates per day were observed at BS, followed by SSA and LN. There were significant between-sites differences in the number of fish in the number of species caught. However, there were no significant between-years differences in the number of fish and numbers of species caught. The trophic classification of fish showed that carnivores (n = 623) were more frequently captured, followed by piscivores (n = 371), herbivores (n = 101) and invertivores (n = 26). The results showed that high sized, top predatory fishes, were the main targets, although other trophic levels were also captured. e Caranx bartholomaei (n = 141); estas quatro espécies representaram 56,5% do total de peixes capturados. Ao longo dos anos amostrados, foram registradas taxas mais elevadas de captura por dia em BS, seguido pelo SSA e LN. Foram encontradas diferenças significativas entre os locais estudados para a quantidade de peixes e o número de espécies capturadas. Entretanto, não foram encontradas diferenças significativas entre os anos para a quantidade de peixes e número de espécies capturadas. A classificação trófica de peixes mostrou que os carnívoros (n = 623) foram mais frequentemente capturados, seguidos de piscívoros (n = 371), herbívoros (n = 101) e invertívoros (n = 26). Os dados apresentados demonstram que grandes peixes predadores de topo são o alvo principal, no entanto outros níveis tróficos também são capturados. Palavras-chave: sobrepesca, recifes de coral, Salvador, Litoral Norte, Baixo Sul. Data AnalysisEach photograph corresponded to one fishery, and was considered as an independent sample. Spatial and temporal variations in total capture and richness (total number of species) were evaluated with nonparametric analysis of variance (Kruskall-Wallis test). Whenever differences were detected in the parameters, the Dunn's test was applied to the data in order to quantify and establish those differences.

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Section: Introductionmentioning

confidence: 99%

Reef fishes captured by recreational spearfishing on reefs of Bahia State, northeast Brazil

et al. 2012

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“…The available popular literature on boat-based marine recreational fishing in South Africa (Mara 1986, Schoeman 1982, van der Elst 1988, 1989, Whibley and Garratt 1989, Crous 2000 make no mention of paddle-ski fishing, and neither does the formal scientific literature (Smale and Buxton 1985, van der Elst and Adkin 1991, Penney 1993, Guastella and Nellmapius 1993, Mann et al 1997a, 1997b, McGrath et al 1997, Penney 1997, Beckley and Pradervand 1999, Pradervand and Govender 1999, Penney et al 1999, Mann 2000, Fennessy et al 2003. The available popular literature on boat-based marine recreational fishing in South Africa (Mara 1986, Schoeman 1982, van der Elst 1988, 1989, Whibley and Garratt 1989, Crous 2000 make no mention of paddle-ski fishing, and neither does the formal scientific literature (Smale and Buxton 1985, van der Elst and Adkin 1991, Penney 1993, Guastella and Nellmapius 1993, Mann et al 1997a, 1997b, McGrath et al 1997, Penney 1997, Beckley and Pradervand 1999, Pradervand and Govender 1999, Penney et al 1999, Mann 2000, F...…”

Section: Discussionmentioning

confidence: 99%

A characterisation of the paddle-ski fishery in KwaZulu-Natal, South Africa

Mann

Pradervand

Maggs

et al. 2012

African Journal of Marine Science

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The KwaZulu-Natal (KZN) paddle-ski fishery in South Africa consists mainly of light-weight fishing kayaks operated by a single fisher in the marine nearshore environment. The social, economic, management and fisheries parameters of this sector were investigated during the period December 2006-February 2008. Socio-economic data were obtained by means of online and telephone surveys. Effort data were collected from three sources: launch site registers, daily counts conducted during shark-meshing operations of the KZN Shark Board, and from a bimonthly aerial survey. Catch data were collected primarily during compliance inspections undertaken by the provincial fisheries management authority. Because there are no formal data on the paddle-ski fishery, this study serves as a baseline assessment. It was estimated that there was a minimum of 650 participants in the fishery who annually undertook 6 685 outings, accounting for a total retained catch of 17 462 fish from 57 different species. This total estimated catch accounted for approximately 2% of the total cumulative catch of the two main provincial recreational fisheries (i.e. the shore-fishery and skiboat fishery). The catch comprised primarily of gamefish species (65%). On average, paddle-ski fishers had investments of around R12 000 in craft and fishing equipment, and an annual expenditure on tackle of R6 000 that equates to a total fishery investment of R7.8 million, with a total annual operating expenditure of at least R3.9 million. Respondents were satisfied with current fisheries regulations, but many were confused by the safety requirements for paddle-skis. The future management of this fishery is discussed in light of its comparatively low impact on coastal resources.

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“…Recreational spearfishing data were collected during the NLS and augmented by additional, site-specific data from Mann et al (1997b) and Lechanteur (2000).…”

Section: Present Catchmentioning

confidence: 99%

“…It has commercial, recreational and subsistence components that catch approximately 25 000 t of fish comprising 200 species, and contribute about US$270 million to the economy annually (McGrath et al 1997;Lamberth and Turpie 2003). The recreational component may be divided into shore-(450 000 participants), boat-(12 800 participants) and spearfishing (7 000 participants) Mann et al 1997aMann et al , 1997bSauer et al 1997). The commercial sector comprises about 3 000 line boats and 12 000 fishers as well as 7 000 fishers from the gillnet and beach-seine fishery Sauer et al 1997;Hutchings 2000).…”

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confidence: 99%

Prioritising species for research, conservation and management: a case study of exploited fish species

Lamberth

Joubert

2014

African Journal of Marine Science

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Studies that categorise species according to their conservation status often fall short in their implementation by not having taken into account the impacts on, or the response from, those that either benefit from, or exploit, the resource under consideration. This is especially true in multispecies fisheries where personnel and funding limitations often create the dilemma over which species should be the first to receive management and research attention. This study uses a multicriteria decision analysis approach to prioritise 176 South African linefish species on the basis of a number of criteria indicating conservation and socio-economic, including fishery sector, importance. For each species, conservation criteria were: abundance trend, level of knowledge, vulnerability, range, and relative exploitation throughout that range. Sectoral criteria were: total catch, degree of targeting, the number of participants and the economic value of each species. The scores given to each species on the basis of each of these criteria were summed to allow an examination of each fish's importance from the points of view of (i) conservation, (ii) each fishery sector separately and combined, and (iii) the overall combined conservation and sectoral importance. Different weight sets were used in the weighted summation of the scores, and results were examined for sensitivity. The results were reasonably insensitive to these changes in weights. Relative scores within each of the fishery sectors were dominated by two or three species. Consequently, the scores separating the remaining species from each other were small. This meant that, in many cases, even when the rank of species changed by a number of places with a different weight set, the differences in score were slight. On the whole, the top fish included the most important species in each sector and biogeographical region and in terms of conservation. The separate and overall rankings should assist in the development of broadly acceptable management strategies for different fish species.

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An evaluation of participation in and management of the South African spearfishery

Cited by 33 publications

References 4 publications

Reef fishes captured by recreational spearfishing on reefs of Bahia State, northeast Brazil

Reef fishes captured by recreational spearfishing on reefs of Bahia State, northeast Brazil

A characterisation of the paddle-ski fishery in KwaZulu-Natal, South Africa

Prioritising species for research, conservation and management: a case study of exploited fish species

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