The Port Alfred fishery: a description and preliminary evaluation of a commercial linefishery on the South African east coast

Hecht, T.; Tilney, R. L.

doi:10.2989/02577618909504554

Cited by 17 publications

(5 citation statements)

References 7 publications

(11 reference statements)

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“…In order to assess the accuracy of the reported catch from a single landing site, a specific comparison of catches for the Port Alfred commercial skiboat fishery in the Eastern Cape was conducted. This site was chosen because the linefishery in this region was evaluated fairly recently (Hecht and Tilney 1989), and the commercial and recreational boat fishermen in the area have had regular contact with local marine scientists explaining the value of the submitted catch records. Only the most common species in the catch, kob Argyrosomuss sp., was evaluated.…”

Section: Validation Of Commercial Catch Returnsmentioning

confidence: 99%

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An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

Sauer¹,

Penney²,

Erasmus³

et al. 1997

South African Journal of Marine Science

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Section: Validation Of Commercial Catch Returnsmentioning

confidence: 99%

“…Dealer and harbour returns were introduced in an effort to obtain total catch indices in the absence of complete return coverage, and a number of research projects (e.g. Hecht and Tilney 1989) have compared NMLS data with independent data sources.…”

Section: Monitoring Of the South African Linefisherymentioning

confidence: 99%

An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

Sauer¹,

Penney²,

Erasmus³

et al. 1997

South African Journal of Marine Science

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“…Prior assessments available for commercial fisheries were insufficient to justify proposed closures within Algoa Bay because they lacked the spatial resolution required to conduct systematic conservation planning over small areas. Previous studies on the commercial linefishery have been undertaken over large (Griffiths 1999(Griffiths , 2000Brouwer and Buxton 2002) or small, local scales (Hecht and Tilney 1989;Donovan 2010), but there is no detailed information available for Algoa Bay. Similarly, trends in the chokka-squid fishery (Roel and Payne 1998;Roel and Butterworth 2000), demersal and pelagic trawl fisheries (Hecht 1977;Badenhorst and Smale 1991;Barange et al 1998;Walmsley et al 2007;Attwood et al 2011), and the shark longline fishery (Da Silva and Bürgener 2007), have all been presented on a national level.…”

Section: Discussionmentioning

confidence: 98%

Assessing the suitability of commercial fisheries data for local-scale marine spatial planning in South Africa

Chalmers

Oosthuizen

Götz

et al. 2014

African Journal of Marine Science

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This study integrates fisheries logbook data with observer and vessel monitoring system (VMS) data in order to assess the accuracy of reported data and to develop high-resolution spatial data suitable for use in local-scale marine spatial planning analyses. Spatial assessments were conducted on five nearshore commercial fisheries to provide baseline information to inform spatial management and conservation planning in Algoa Bay, South Africa. Clear spatial patterns in the distribution of fishing effort were apparent for the linefishery, chokka-squid and inshore demersal trawl sectors. Observer and VMS data confirmed the broad spatial distribution of resource-use patterns of logbook data. Combining these data sources allowed higher-resolution spatial indices of fishing effort to be developed, which are suitable for systematic spatial planning on a local scale and can be used for future spatial management and conservation.

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“…Marais andBaird 1980, Modde 1980, Lenanton ]982, Ross et at. ]987, Hecht and Tilney 1989, Tilmant 1989, Bennett and Attwood 1993. Summer peaks in fish abundance have been reported by most studies on surf-zone and nearshore ichthyofaunas, seasonal change in physical conditions, notably water temperature, being cited as the major determining factor (e.g.…”

mentioning

confidence: 98%

Seasonality of beach-seine catches in False Bay, South Africa, and implications for management

Lamberth¹,

Clark²,

Bennett³

1995

South African Journal of Marine Science

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Commercial beach-seine catches and effort in False Bay are strongly seasonal, 93% of the to~al catch being taken in spring, summer and autumn. Catch per haul of the target species Liza richardsonii in May (autumn) and October (spring) was double that recorded in summer, even though effort was only half of that during summer. Effort was largely dependent on the frequency of occurrence of patches of the surf-zone diatom Anaulus birostratus, on which L. richardsonii feed and around which the nets were set. Species important in recreational anglers' catches, namely Lithognathus lithognathus, Diplodus sargus capensis, Rhabdosargus globiceps, Seriola lalandi, Dichistius capensis, Pomatomus saltatrix, Umbrina canariensis and Argyrosomus hololepidotus, were also more abundant in spring, summer and autumn. It is concluded that the present winter closed season, during which "angling" fish have to be released, is not having the desired effect of reducing the total catch of these species because they are more abundant in summer. A possible alternative to the present partially closed season would be to disallow seine-netting on weekends and public holidays. This may reduce the total catch of "angling" species by 30%.Handelsvangste en -poging met strandseens in Valsbaai wissel seisoensgewys sterk en 93% van die algehele vangs word in die lente, somer en herfs ingebring. Vangs per trek van die teikenspesie Liza richardsonii was in Mei (herfs) en Oktober (Iente) dubbel wat dit in die somer was, selfs ofskoon die poging maar die helfte was van wat dit in die somer was. Poging hang graotliks af van die voorkomsfrekwensie van kolle van die brandingsonediatoom Anaulus birostratus wat L. richardsonii bewei en waar random die nette gegooi is. Spesies wat belangrik in die vangste van ontspanningshengelaars is, te wete Lithognathus lithognathus, Diplodus sargus capensis, Rhabdosargus globiceps, Seriola lalandi, Dichistius eapensis, Pomatomus saltatrix, Umbrina eanariensis en Argyrosomus hololepidotus, was ook in die lente, somer en herfs volopper. Die gevolgtrekking word gemaaak dat die huidige geslote winterseisoen waartydens "hengel"-vis vrygelaat moet word, nie die gewenste uitwerking het om die totale vangs van hierdie spesies te verminder nie omdat hulle in die somer vol opper is. 'n Moontlike altematief vir die huidige dee Is geslote seisoen sou wees om seennetvangs oor naweke en openbare vakansiedae te belet. Dit kan die totale vangs van "hengel"-spesies met 30% verminder.

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The Port Alfred fishery: a description and preliminary evaluation of a commercial linefishery on the South African east coast

Cited by 17 publications

References 7 publications

An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

Assessing the suitability of commercial fisheries data for local-scale marine spatial planning in South Africa

Seasonality of beach-seine catches in False Bay, South Africa, and implications for management

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