Artisanal fishing of spiny lobsters with gillnets — A significant anthropic impact on tropical reef ecosystem

Giraldes, Bruno Welter; Silva, Angela Zacaron; Corrêa, Fábio Mathias; Smyth, David

doi:10.1016/j.gecco.2015.10.008

Cited by 15 publications

(10 citation statements)

References 31 publications

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“…Our results underscore the threats that lobster gillnets can pose to non-target species, which is particularly troubling given their prevalent use in smallscale fisheries throughout Latin America. In the western Atlantic, artisanal fishers include nonselective gillnets in the wide array of main gear used to target lobsters in coastal waters, including traps, aggregation devices, and diving (Ehrhardt, 2005;FAO, 2006;Salas et al, 2011;Giraldes et al, 2015). Indeed, Aucoin & León (2007) reported the capture of three juvenile hawksbills in a 640 m lobster gillnet used in experimental bycatch trials during 24-h periods over four days in the Dominican Republic, and encountered a lobster gillnet with an additional seven dead juvenile hawksbills.…”

Section: Discussionmentioning

confidence: 99%

Survival on the rocks: high bycatch in lobster gillnet fisheries threatens hawksbill turtles on rocky reefs along the Eastern Pacific coast of Central America

Liles¹,

Gaos

Bolaños³

et al. 2017

lajar

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ABSTRACT. Small-scale coastal fisheries can cause detrimental impacts to non-target megafauna through bycatch. This can be particularly true when high-use areas for such species overlap with fishing grounds, as is the case with hawksbill turtle (Eretmochelys imbricata) aggregations at lobster gillnet fishing sites in El Salvador and Nicaragua. We quantified hawksbill bycatch by partnering with local fishers to record data for 690 gillnet sets on rocky reefs at Los Cóbanos Reef Marine Protected Area ) and Punta Amapala (2012 in El Salvador, and La Salvia (2012)(2013)(2014) in Nicaragua. Based on 31 observed hawksbill captures, the mean bycatch-per-unit-effort (0.0022; individuals per set = 0.0450) and mortality (0.74) are among the highest reported for the species across fishing gear types and oceanic regions worldwide, and we conservatively estimate that at least 227 juvenile hawksbill captures occurred in lobster gillnet fishing fleets at our sites during the study. Estimated mortality for the 227 hawksbills -which could approach the 74% observed mortality of total capturesfrom interactions with lobster gillnet fisheries at these sites during the study period may constitute the greatest single source of human-induced in-water mortality for juvenile, sub-adult, and adult hawksbills in the eastern Pacific, and is of grave concern to the population. Based on our findings, we discuss neritic habitat use by hawksbills during their 'lost years' and offer recommendations for bycatch reduction strategies, including community-based efforts to enhance sustainable self-governance via the establishment of locally crafted conservationist norms and marine protected areas at important developmental habitat.

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Section: Discussionmentioning

confidence: 99%

Survival on the rocks: high bycatch in lobster gillnet fisheries threatens hawksbill turtles on rocky reefs along the Eastern Pacific coast of Central America

Liles¹,

Gaos

Bolaños³

et al. 2017

lajar

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“…O recrutamento de novos indivíduos para a pesca, com comprimento suficiente para serem selecionados nos aparelhos de pesca, e o aumento da disponibilidade de fêmeas adultas para a pesca, as quais estariam menos ativas, abrigadas ou em áreas fora de alcance da frota comercial no período de defeso, são dois fatores a serem considerados. De fato, P. meripurpuratus e P. laevicauda têm maior intensidade de desova entre janeiro e abril e fevereiro e maio, respectivamente, sendo que nesta época de reprodução ocorre migração de adultos, especialmente fêmeas, para áreas mais profundas (SILVA e FONTELES-FILHO, 2011;GIRALDES et al, 2015), desfavoráveis à pesca. Há também evidências de que a proporção de fêmeas aumentou nos meses posteriores ao período principal de desova na década de 1960, fato este evidenciado pelos dados dos desembarques de lagosta em Fortaleza-CE (PAIVA e SILVA, 1962;PAIVA e COSTA, 1963;PAIVA e COSTA, 1964;PAIVA, 1965;PAIVA, 1966;PAIVA, 1967;PAIVA e COSTA, 1968;PAIVA e COSTA, 1969).…”

Section: Discussionunclassified

Variações nas capturas das lagostas vermelha (Panulirus meripurpuratus), verde (Panulirus laevicauda Latreille, 1817) e sapata (Scyllarides brasiliensis Rathbun, 1906) na costa de Pernambuco

Lima

Andrade

2017

Bol. Inst. Pesca

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Lobsters are valuable fisheries resources in the northeast coast of Brazil. In the Pernambuco state the catches of the red (Panulirus meripurpuratus) and the green (Panulirus laevicauda) spiny lobsters are high, while the catches of the slipper lobster (Scyllarides brasiliensis) is low. In this study the variability of the monthly and annual catches of those three species were analyzed with data obtained between 1999 and 2006. Overall the red lobster predominates in the catches. Catch of the red and the green lobsters decrease quickly starting from the beginning of the fishery after the closed season, but this do not occur for slipper lobster. Total annual catches of small or intermediate length boats were higher than summed catches of large boats. São José da Coroa Grande, followed by Recife, is the city with highest catches. There was spatial zonation concerning the proportions of the three species in the annual catches. The red lobster is largely dominant in the catches of the south coast, where the slipper lobster is not uncommon. In the north coast catches the slipper lobster are rare and the proportion of green lobster is high and similar to the proportion of the red lobster. RESUMOLagostas são valiosos recursos pesqueiros na costa nordeste do Brasil. No estado de Pernambuco, as capturas das lagostas vermelha (Panulirus meripurpuratus) e verde (Panulirus laevicauda) foram elevadas, enquanto as da lagosta sapata (Scyllarides brasiliensis), reduzidas. Neste artigo, as variações mensais e anuais das capturas foram analisadas nos desembarques das três espécies entre 1999 e 2006. De maneira geral, a lagosta vermelha foi predominante. As capturas das lagostas vermelha e da verde decresceram rapidamente a partir do início da temporada de pesca, logo após o defeso, padrão esse não observado para a lagosta sapata. As capturas anuais provenientes das embarcações de comprimento pequeno ou intermediário foram maiores que as das embarcações de maior porte. São José da Coroa Grande, seguida do Recife, foi a cidade em que se verificaram as maiores quantidades desembarcadas. Houve zonação espacial no que diz respeito às proporções das três espécies nas capturas anuais. A lagosta vermelha foi amplamente dominante nas capturas da costa sul, onde a sapata não foi incomum. Na costa norte, a lagosta sapata foi rara, e a proporção de lagosta verde foi alta e similar à da lagosta vermelha.Palavras-chave: lagostas espinhosas; lagosta sapata; zonação.

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“…The implementation of a low impact monitoring methodology such as nocturnal Underwater Visual Censuses suggested by Giraldes et al (2015a, b) is urgently required to obtain the necessary ecological data about these large lobsters in coastal areas. The use of Underwater Visual Censuses has proved successful in obtaining ecological indexes for decapod species including spiny lobsters (Faria Júnior et al 2007;Lozano-Álvarez et al 2007;Rios-Lara et al 2007;Bertelsen et al 2009;Teschima et al 2012;Giraldes et al 2012Giraldes et al , 2015aGiraldes et al , 2015b. These in-situ studies can provide important ecological information which will aid the protection of threatened lobster species such as; intensity and seasonality of recruitment, differences in populations between sites, foraging habits, feeding behaviour, seasonal changes, spatial distribution, lunar influence, anthropogenic influence, niche differentiations, among others.…”

Section: Discussionmentioning

confidence: 99%

“…Fishing history. (Based on Ivo & Pereira 1996;Rocha et al 1997;Silva & Fonteles-Filho 2011;Giraldes et al 2015b; as P. argus in Brazil).…”

Section: Introductionmentioning

confidence: 99%

“…Clearly the management and oversight strategies to control and limit the capture of this species by the Brazilian government have not been rigorous enough to address the overfishing scenario. A major concern about the management of this species was highlighted by Giraldes et al (2015b) when particular emphasis was focused on the importance of protecting the natural nursery regions of the shallow coastal reef ecosystem (<15m).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recognizing Panulirus meripurpuratus sp. nov. (Decapoda: Palinuridae) in Brazil—Systematic and biogeographic overview of Panulirus species in the Atlantic Ocean

Giraldes

Smyth

2016

Zootaxa

Self Cite

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Genetic analysis divides Panulirus argus into two different species, physically separated by the Amazon-Orinoco plume since the Last Glacial Maximum. Panulirus argus sensu stricto is distributed north of this biogeographic barrier and the second species to the south, occurring in Brazil. The Panulirus species in the Atlantic Ocean are being overfished and the standing stocks are unknown and still not considered endangered or threatened due to a deficiency of precise abundance data. The lack of data makes it impossible to undertake an effective conservation and management policy. In order to assist in the future management and conservation of the Spiny Lobster in the Atlantic Ocean and particularly for the indigenous species from Brazilian waters, this study formally recognizes and describes a new species, Panulirus meripurpuratus sp. nov., for what was previously known as P. argus in Brazilian waters, and differentiates it from Panulirus argus from North American waters and the Caribbean Sea. The work also presents an overview of the biogeographic distribution of the species and presents two identification keys to Atlantic species, one based on morphology and the other on live colouration.

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Artisanal fishing of spiny lobsters with gillnets — A significant anthropic impact on tropical reef ecosystem

Cited by 15 publications

References 31 publications

Survival on the rocks: high bycatch in lobster gillnet fisheries threatens hawksbill turtles on rocky reefs along the Eastern Pacific coast of Central America

Survival on the rocks: high bycatch in lobster gillnet fisheries threatens hawksbill turtles on rocky reefs along the Eastern Pacific coast of Central America

Variações nas capturas das lagostas vermelha (Panulirus meripurpuratus), verde (Panulirus laevicauda Latreille, 1817) e sapata (Scyllarides brasiliensis Rathbun, 1906) na costa de Pernambuco

Recognizing Panulirus meripurpuratus sp. nov. (Decapoda: Palinuridae) in Brazil—Systematic and biogeographic overview of Panulirus species in the Atlantic Ocean

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