Potential bycatch of seabirds and turtles in hook-and-line fisheries of the Itaipava Fleet, Brazil

Bugoni, Leandro; Neves, Tatiana; Leite, N. O.; Carvalho, Demetrio M. R.; Sales, Gilberto; Furness, Robert W.; Stein, Carlos Eduardo; Peppes, Fabiano V.; Giffoni, Bruno; Monteiro, Danielle

doi:10.1016/j.fishres.2007.10.013

Cited by 69 publications

(54 citation statements)

References 12 publications

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“…In the present study, fishing activities followed by marine pollution were found to be the main threats to turtles on the Paraíba coast. The predominance of entanglement with fishing apparatus as the main human interaction registered in the stranded turtles corroborates other studies where fishing activity appears to be one of the most important anthropogenic-related sources of sea turtle mortality in the world (Marcovaldi et al, 2006;Bugoni et al, 2008;Casale et al, 2010). In Paraíba State, fishing is mainly artisanal, comprising sailboats and small motorboats fishing in shallow waters near the coast and in estuaries, deploying gillnets, hook-and-lines and fishing by manual collection (IBAMA, 2008).…”

Section: Discussionsupporting

confidence: 88%

“…Sea turtles face a wide variety of stressors, mainly anthropogenic (Lutcavage et al, 1997). In Brazil, a major cause of sea turtle mortality is linked to incidental capture in fishing artifacts (Mascarenhas et al, 2005;Marcovaldi et al, 2006;Bugoni et al, 2008). Marine pollution is another serious threat that causes habitat degradation and turtle death through debris ingestion or entanglement (Bjorndal et al, 1994;Ivar do Sul and Costa, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Patterns and inferred processes associated with sea turtle strandings in Paraíba State, Northeast Brazil

et al. 2014

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This study analysed sea turtle strandings on the coast of Paraíba State, Northeastern Brazil, from August 2009 to July 2010. A total of 124 strandings were recorded in this period: green turtle Chelonia mydas (n = 106), hawksbill Eretmochelys imbricata (n = 15), olive ridley Lepidochelys olivacea (n = 2) and loggerhead Caretta caretta (n = 1). Of all turtles for which the Curved Carapace Length (CCL) was measured (n = 122), only 12 individuals (9.7%) were adults. Twenty individuals had synthetic anthropogenic debris in the gastrointestinal tract. Other traces of human interactions were observed in 43 individuals, such as injuries caused by entanglement in fishing lines or nets, collisions with vessels, direct contact with oil spills and lesions caused by sharp or spiked objects. Moreover, in 28.5% of the stranded turtles, the presence of external tumors was noticed, suggestive of fibropapillomatosis and in 9.7%, shark bite marks were observed. Of the 107 individuals that were sexed, 76 were females and 31 were males. Most turtles (72.6%) became stranded during the spring/summer (between October and March). We found evidence of human interactions (injuries) in half of the strandings, but in most cases it was not possible to determine if such interactions were the cause of death. A logistic regression found a significant relationship between CCL, ingestion of debris and lesions caused by sharks or spiked objects. Systematic data collection from stranded sea turtles can provide useful biological information, such as seasonal and spatial patterns in their occurrence and mortality, age structure, sex ratio and diet, as well as possible mortality causes.Keywords: threatened species, human impact, beach strandings, green sea turtle. Padrões e inferências associadas com encalhes de tartarugas marinhas no Estado da Paraíba, Nordeste do Brasil ResumoEste estudo analisou encalhes de tartarugas marinhas na costa do Estado da Paraíba, Nordeste do Brasil, de agosto de 2009 a julho de 2010. Neste período, 124 encalhes foram registrados: tartaruga-verde Chelonia mydas (n = 106), tartaruga-de-pente Eretmochelys imbricata (n = 15), tartaruga-oliva Lepidochelys olivacea (n = 2) e cabeçuda Caretta caretta (n = 1). Dentre todas as tartarugas que tiveram o Comprimento Curvilíneo da Carapaça (CCC) medido (n = 122), apenas 12 indivíduos (9,7%) foram considerados adultos. Vinte indivíduos tinham detritos antropogênicos sintéticos no trato gastrointestinal. Em 43 indivíduos, outros vestígios de interações humanas foram observados, tais como lesões causadas por emaranhamento em linhas ou redes de pesca, colisões com embarcações, contato direto com derramamentos de óleo e lesões causadas por objetos perfurocortantes. Além disso, em 28,5% das tartarugas encalhadas, foi observada a presença de tumores externos sugestivos de fibropapilomatose e em 9,7%, foram observadas marcas de mordidas de tubarão. Dos 107 indivíduos sexados, 76 eram fêmeas e 31 eram machos. A maioria das tartarugas (72,6%) encalhou durante a primavera/verão (entre ...

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Patterns and inferred processes associated with sea turtle strandings in Paraíba State, Northeast Brazil

et al. 2014

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“…Because the fishing grounds of Group 4 (dolphinfish) are closer to the coast (DALLAGNOLO; ANDRADE, 2008;DOXSEY, 2006) and the vessels used are smaller , there is a smaller effort in days at sea. However, the total number of hooks used was similar to the other groups', which is certainly related to the strategy adopted -that of using more than one set on a single day (DALLAGNOLO; ANDRADE, 2008;BUGONI et al, 2008).…”

Section: Discussionmentioning

confidence: 57%

Spatio-temporal distribution and target species of longline fisheries off Southeastern/Southern Brazil between 2000 and 2011

Fiedler

Sales

Giffoni³

et al. 2015

Braz. j. oceanogr.

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In the presente study, cluster analysis was performed to classify 1080 interviews with captains of national pelagic longline fleet (2000 to 2011), and 38 trips of the chartered fleet (2003 to 2008), in relation to the composition of species landed. For the national fleet 4 groups were identified: 1 - Albacores, 2 - Blue shark, 3 - Swordfish, and 4 - Dolphinfish. For the chartered fleet 3 groups were identified: 1 - Swordfish, 2 - Blue shark, and 3 - Albacores. The results indicated that part of the national fleet change their strategies according to the availability of the target species and market demand (internal and external). A part of the fleet from Espírito Santo state operates in the region between December and March, exclusively to capture dolphinfish. The chartered fleet differed from the national one as regards the fishing areas of each target species, mainly as regards swordfish and blue shark. Despite the great difference in the data sets, it is evident that both the national and the chartered fleets operated in accordance with their peculiarities and technological development, adopting strategies that optimize catches and net profits per trip.

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“…Debris collected from other North Sea coastlines such as Germany, the Netherlands, Belgium, France, Norway and Denmark, has been largely attributed to shipping and fishing activity (Galgani et al, 2000;van Franecker et al, 2005;Vauck and Schrey, 1987). Furthermore, fishing gear, operational as well as floating fragments, has been shown to cause entangling and mortality of marine animals (Derraik, 2002) including seabirds (Bugoni et al, 2008;Simeone et al, 1999;Stempniewicz, 1994;Votier et al, 2011;Zador et al, 2008), cetaceans (Johnson et al, 2005;Neilson et al, 2009;Ramos et al, 2011;Robbins and Matilla, 2004), turtles (Carr, 1987), sharks (Sazima et al, 2002) and seals (Hanni and Pyle, 2000;Hofmeyr et al, 2006;Page et al, 2004).…”

Section: The Fishing Industry As a Source Of Marine Debris On Beachesmentioning

confidence: 99%

Fisheries as a source of marine debris on beaches in the United Kingdom

Unger

Harrison

2016

Marine Pollution Bulletin

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Marine debris from ships has persisted and remains a concern despite international agreements such as MARPOL. We report on an analysis of beach litter based on a data set established by the Marine Conservation Society (MSC) Beachwatch weekends. Debris collected around the UK was divided into three main types of debris: (1) plastic (2) fishing, (3) fishing related plastic and rubber. Correspondence analysis (CA) was used to examine patterns in the occurrence of debris types on a total of 1023 beaches and debris attributable to fishing was identified on clusters of beaches mainly located on the coasts of Scotland and along the English Channel. General Linear model (GLM) identified fishing as the highest explanatory factor when testing for relationships between litter and proximity to fishing ports and grounds. The results add to the growing body of evidence that the fishing industry is largely responsible for marine debris.

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Potential bycatch of seabirds and turtles in hook-and-line fisheries of the Itaipava Fleet, Brazil

Cited by 69 publications

References 12 publications

Patterns and inferred processes associated with sea turtle strandings in Paraíba State, Northeast Brazil

Patterns and inferred processes associated with sea turtle strandings in Paraíba State, Northeast Brazil

Spatio-temporal distribution and target species of longline fisheries off Southeastern/Southern Brazil between 2000 and 2011

Fisheries as a source of marine debris on beaches in the United Kingdom

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