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2011 | 41 | 3 |
Tytuł artykułu

Catches of the sport fishing competitions along the Algarve Coast (Portugal): species, sizes, catch rates, and trends

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Background. Stocks of many marine fishes are in decline and a number of studies suggest that for some species the impact of recreational angling may be important. To date, only recreational (leisure) fishing surveys have been conducted in Portugal, with no studies on beach angling competitions, dynamically increasing in number over the past 10 to 20 years. In view of the above, we decided to evaluate the impact of such events on the Algarve coast (southern Portugal) in terms of the abundance, diversity, and respective weight of fish species caught and outline some conservation measures and recommendations for the management of the targeted species. Materials and methods. Participants of 22 angling competitions taking place between February and June 2007 were surveyed. In each competition a random sample of anglers was interviewed, and the specimens caught by each participant were identified, weighed, and measured. Results. Thirteen taxa belonging to eight families were identified, and the most common were: garfish, Belone belone (Linnaeus, 1761); mullets,Mugilidae (not identified); and mackerels, Scomber spp. A total of 563 specimens were sampled, totalling 75.4 kg of weight, with the average catch per angler weighing 0.5 ± 0.05 SE (n = 153) kg. Differences were also observed between the length at first maturity (L50) of the specimens caught and their respective Minimum Landing Size (MLS) and Allowed Minimum Size (AMS), most particularly in the case of the European seabass, Dicentrarchus labrax (L.), with almost all individuals caught measuring below the speciesspecific L50. Analysis of time series of competition results (1996–2009) showed no evidence of a decrease in catches or in mean weight. Conclusion. Based on the results we propose that the AMS for beach angling competitions should be increased to the MLS in order to prevent the capture of juvenile fishes, especially the sea bass. Future studies should address the size selectivity of the hooks used in beach competitions, with a view to the implementation of a minimum hook size for competitions.
Wydawca
-
Rocznik
Tom
41
Numer
3
Opis fizyczny
p.165-169,fig.,ref.
Twórcy
  • Universidade do Algarve, F.C.T., Campus de Gambelas, 8005-139 Faro, Portugal
autor
autor
Bibliografia
  • Anonymous 2000. Decreto-lei n°246/2000 de 29 de Setembro. Diário da República Electrónico http://www.dre.pt/ [In Portuguese.]
  • Anonymous 2007a. Calendário regional de 2007, competições de pesca desportiva [Regional calendar of 2007 sport fishing competitions.] Associação Regional de Pesca Desportiva do Algarve. [In Portuguese.]
  • Anonymous 2007b. Espécies sujeitas a tamanho ou peso mínimo de captura. [Species subject to minimum weight or size of catch.] Direcção Geral das Pescas e Aquicultura. [Fishing and Aquaculture General Direction.] http://www.picapeixe. web.pt/Portaria_27_de_2001.pdf [In Portuguese.]
  • Brouwer S.L., Buxton C.D. 2002. Catch and effort of the shore and skiboat line fisheries along the South African Eastern Cape coast. South African Journal of Marine Science 24 (1): 341–354. DOI: 10.2989/025776102784528286
  • Collares Pereira M.J., Cowx I.G., Ribeiro F., Rodrigues J.A., Rogado L. 2000. Threats imposed by water resource development schemes on the conservation of endangered fish species in the Guadiana River basin in Portugal. Fisheries Management and Ecology 7 (1–2): 167–178. DOI: 10.1046/j.1365-2400.2000.00202.x
  • Pawson M.G., Pickett G.D. 1996. The annual pattern of condition and maturity in bass (Dicentrarchus labrax L.) in waters around England and Wales. Journal of the Marine Biological Association of the United Kingdom 76 (1): 107–125. DOI: 10.1017/S0025315400029040
  • Anonymous 1986.Monografias hidrológicas dos principais cursos de água de Portugal Continental. [Hydrological monographs of the major water streams of mainland Portugal.] Direcção Geral dos Recursos e Aproveitamentos Hidráulicos. Ministério do Plano e da administração do Território, Secretaria de Estado do Ambiente e Recursos Naturais, Portugal. [Directorate General for Resources and Hydraulic Works, Ministry of Planning and Territorial Administration, Secretary of State for Environment and Natural Resources, Portugal.] [In Portuguese.]
  • Post J.R., Sullivan M., Cox S., Lester N.P., Walters C.J., Parkinson E.A., Paul A.J., Jackson L., Shuter B.J. 2002. Canada’s recreational fishery: The invisible collapse? Fisheries 27 (2): 6–17. DOI: 10.1577/1548-8446(2002)027<0006:CRF>2.0.CO;2
  • Pradervand P., Baird D. 2002. Assessment of the recreational line fishery in selected Eastern Cape estuaries: trends in catches and effort. African Journal of Marine Science 24 (1): 87–101. DOI: 10.2989/025776102784528592
  • Pradervand P., Govender R.D. 2003. Assessment of catches in shore angling competitions from the border region of the Eastern Cape, South Africa. African Zoology 38 (1): 1–14.
  • Rangel M.O., Erzini K. 2007. An assessment of catches and harvest of recreational shore angling in north of Portugal. Fisheries Management and Ecology 14 (5): 343–352. DOI: 10.1111/j.1365-2400.2007.00560.x
  • Richardson E.A., Kaiser M.J., Edwards-Jones G., Ramsay K. 2006. Trends in sea anglers’ catches of trophy fish in relation to stock size. Fisheries Research 82 (1–3): 253–262. DOI: 10.1016/J.FISHRES.2006.05.014
  • Smith A.K., Pollard D.A. 1996. The best available information—some case studies from NSW, Australia, of conservation-related management responses, which impact on recreational fishers. Marine Policy 20 (3): 261–267. DOI: 10.1016/0308-597X(96)00011-5
  • Anonymous 2011. The IUCN Red List of Threatened species. Conservation status. www.iucnredlist.org
  • Veiga P., Ribeiro J., Gonçalves J.M.S., Erzini K. 2010. Quantifying recreational shore angling catch and harvest in the south of Portugal (north-east Atlantic Ocean): implications for conservation and integrated fisheries management. Journal of Fish Biology 76 (9): 2216–2237. DOI: 10.1111/j.1095-8649.2010.02665.x
Typ dokumentu
Bibliografia
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Identyfikator YADDA
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