Impact of commercial fishing on Trindade Island and Martin Vaz Archipelago, Brazil: characteristics, conservation status of the species involved and prospects for preservation

Pinheiro, Hudson T.; Martins, Agnaldo Silva; Gasparini, João Luiz

doi:10.1590/s1516-89132010000600018

Cited by 24 publications

(22 citation statements)

References 6 publications

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“…Because of this great effort, cluster analysis separated a group for this species. The region of the Vitória-Trindade Chain is an important area for longline fishing, the presence of foreign vessels, both legalized and clandestine, being constantly reported there (WU; YEH, 2001;PINHEIRO et al, 2010). In Group 2 (blue shark), there was an overlap in the area used by the national fleet, but effort was more concentrated in the region of the shelf break off Santa Catarina and Rio Grande do Sul states.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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 fact, the coney has been shown to be more abundant in oceanic banks and islands (Atol das Rocas, Fernando de Noronha and Trindade Island) than in the continental coastal regions (Floeter et al, 2007;Krajewski & Floeter, 2011;Pinheiro et al, 2011). Thirdly, fisheries at Trindade Island are mostly focused on larger fish species such as Carcharhinus perezii, Xiphias gladius, Mycteroperca venenosa, Ephinephelus adscensionis (Pinheiro et al, 2010), which may also contribute to reduced competition and predation over C. fulva. It has been shown that in highly fished waters of the Caribbean, small non-targeted species such as C. fulva and C. cruentatus have become locally dominant (Chiappone et al, 2000;Stallings, 2008;Mumby et al, 2012) .…”

Section: Discussionmentioning

confidence: 99%

“…These reef environments comprise areas with diverse structural complexity regarding the presence and size of holes and rocks representing optimal habitats for fish. Despite this island has been declared an ecological reserve, fishing is still allowed, and pelagic longline, trolling bottom line and handline have been reported around the island (Pinheiro et al, 2010). Moreover, signs of top predators overfishing have been recently observed (Pinheiro et al, 2010Pereira-Filho et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution and diet of Cephalopholis fulva (Ephinephelidae) at Trindade Island, Brazil

et al. 2012

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In this study we analyze the population structure and diet of the coney Cephalopholis fulva at Trindade Island, Brazil, through direct observation with SCUBA diving in 11 reef sites around the Island, up to 50 m deep. Diet was based on 77 individuals collected with speargun. Mean population density and biomass were estimated at 29 individuals/100 m 2 and 13 kg/100 m 2 , respectively. This species is regularly distributed along the costal environments of the Trindade Island, with no significant differences in densities and biomass detected among the different collection habitats (reef crest, reef slope, and reef plateau). However, significantly higher densities were observed micro-habitats with greater structural complexity, which may offer more shelter and food to C. fulva. Four food item groups were identified from the gut contents of C. fulva: Annelida, Crustacea, Teleostei, and Testudinata. It is the first record of predation of the green turtle Chelonia mydas hatchlings by the coney. Trindade Island seems to present the densest concentration of C. fulva in all Brazilian and Caribbean ecosystems inhabited by this species. Scarcity of competitors, predators, and fishing pressure may explain the high densities observed in the Island.Foram analisadas a estrutura populacional e a dieta do catuá Cephalopholis fulva na Ilha da Trindade, Brasil. Os dados foram obtidos através de censos visuais com mergulho autônomo em 11 locais no entorno da ilha, em profundidades de até 50 m. A dieta e a proporção sexual foram baseadas na análise de 77 indivíduos coletados com arpão. A densidade populacional e biomassa foram estimados em 29 indivíduos/m² e 13 kg/100 m², respectivamente. A espécie apresentou distribuição uniforme nos ambientes costeiros da ilha, não tendo sido registradas diferenças significativa em sua densidade e biomassa entre os diferentes habitats estudados (crista, talude e platô recifal). Entretanto, foi observado preferência por micro-habitats de alta complexidade estrutural. Foram registrados quatro grupos de itens alimentares no conteúdo estomacal de C. fulva: Annelida, Crustacea, Teleostei e Testudinata. É feito aqui o primeiro registro de predação de juvenis da tartaruga-verde (Chelonia mydas) por C. fulva. Trindade parece apresentar os maiores valores de densidade para o catuá, quando comparada a outras localidades do Brasil e Caribe. A escassez de competidores, predadores e a pressão pesqueira são possíveis fatores que podem explicar as altas densidades observadas para C. fulva na Ilha da Trindade.

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“…In Trindade, as in Fernando de Noronha, the biomass of macro‐carnivores is made up of medium‐sized epinephelids, such as C. fulva, E. adscensionis and, to a lesser degree, Mycteroperca interstitialis (Poey 1860), while large epinephelids are rare. Pinheiro et al (2010 b ) reported the presence of a longline fishing fleet operating in the shallow waters of Trindade. Similar activities have been reported to occur around the Trindade and Martin Vaz insular complex and the Vitória–Trindade submarine chain for the last 15 years (Martins et al , 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Although most Brazilian oceanic islands ( i.e. Noronha, Atol da Rocas and St Paul's Rocks, but not Trindade nor Martin Vaz) have some degree of legal protection established by the national conservation unit programme (SNUC) (ICMBio, 2007), commercial and recreational fishing is often permitted and negative fishing effects have been detected (Ferreira et al , 2009; Pinheiro et al , 2010 b ).…”

Section: Introductionmentioning

confidence: 99%

Reef fish structure and distribution in a south-western Atlantic Ocean tropical island

Pinheiro¹,

Ferreira²,

Joyeux³

et al. 2011

Journal of Fish Biology

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The community structure of the reef fish fauna of Trindade Island, a volcanic oceanic island located 1160 km off the coast of Brazil, is described based on intensive visual censuses. Seventy-six species were encountered in 252 censuses, with mean ± S.E. of 99 ± 3 individuals and 15.7 ± 0.3 species 40 m(-2) transect. The average fish biomass, calculated from length-class estimation, was 22.1 kg 40 m(-2) transect. The species contributing most to biomass were, in decreasing order, Melichthys niger, Cephalopholis fulva, Kyphosus spp., Holocentrus adscensionis, Sparisoma amplum, Sparisoma axillare, Acanthurus bahianus and Epinephelus adscensionis. Carnivorous fishes were the largest trophic group in terms of biomass, followed by omnivores and roving herbivores. The two predominant types of reef habitat, fringing reefs built by coralline algae and rocky reefs made of volcanic boulders, showed significant differences in the biomass and the abundance of the trophic guilds. Within each habitat type, significant differences in species richness, density and biomass were detected among crest, slope and interface zones. Although similar in overall species composition to coastal reefs in Brazil, the fish fauna of Trindade Island shares certain characteristics, such as a high abundance of planktivores, with other Brazilian oceanic islands. Despite comparatively high fish biomass, including the macro-carnivorous species habitually targeted by fisheries, signs of overfishing were evident. These findings highlight the urgency for a conservation initiative for this isolated, unique and vulnerable reef system.

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Impact of commercial fishing on Trindade Island and Martin Vaz Archipelago, Brazil: characteristics, conservation status of the species involved and prospects for preservation

Abstract: Visual records, radio interviews and onboard observations of the fishing activities during a 58 days scientific expedition to Trindade Island

Cited by 24 publications

References 6 publications

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

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

Spatial distribution and diet of Cephalopholis fulva (Ephinephelidae) at Trindade Island, Brazil

Reef fish structure and distribution in a south-western Atlantic Ocean tropical island

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