O conhecimento ecológico local dos pescadores artesanais de Fernando de Noronha (PE) sobre as espécies de peixes utilizadas como iscas

Artisanal fishing on Fernando de Noronha is directly related to fishing for bait, since commercial fishing depends on these baits. This work aimed to analyze the local ecological knowledge of fishermen about the biology and ecology of the fish species used as bait on Fernando de Noronha (state of Pernambuco - PE) to support the planning of the local activity. Data collection was carried out through interviews with semi-structured scripts containing questions about the socio-economic profile of the fishermen and the biological and ecological aspects of the species used as bait. The data were analyzed qualitatively and quantitatively, seeking to represent a consensus among the informants and to compare the local ecological knowledge with the scientific literature through the method of comparative cognition and the hypothesis test. Sixty-nine fishermen were interviewed, using false herrings (Harengula clupeola) and mackerel scads (Decapterus macarellus) as their main bait fish, in still fishing and fishing using boats. The hypothesis test, applied to the mentioned results by more than 30% of the fishermen, showed a high degree of agreement between local ecological knowledge and the scientific literature, revealing detailed knowledge of the fishermen on the biological and ecological aspects of false herrings and mackerel scads. Catching bait fish on Fernando de Noronha proved to be extremely important, both for the relationship with artisanal fishing and for the maintenance of local knowledge and culture. The results obtained in this research should foster a very much-needed dialogue between fishermen and those responsible for managing conservation units to create legal and effective mechanisms to meet the demand for bait fish used in commercial fishing and to maintain a sustainable artisanal fishing model for Fernando de Noronha.A pesca artesanal em Fernando de Noronha está diretamente relacionada com a pesca de iscas, pois delas dependem as capturas dos peixes comerciais. Este trabalho objetivou analisar o conhecimento ecológico local dos pescadores sobre a biologia e a ecologia das espécies de peixes utilizadas como iscas em Fernando de Noronha (PE), a fim de subsidiar o ordenamento da atividade local. A coleta de dados foi realizada por meio de entrevistas com roteiros semiestruturados que continham questões sobre o perfil socioeconômico dos pescadores e aspectos biológicos e ecológicos das espécies utilizadas como iscas. Os dados foram analisados qualitativamente e quantitativamente, buscando representar o consenso entre os informantes e comparar o conhecimento ecológico local com a literatura cientifica pelo método de cognição comparada e o teste de hipóteses. Foram entrevistados 69 pescadores, que utilizam a sardinha (Harengula clupeola) e o garapau (Decapterus macarellus) como principais iscas, em pescarias embarcadas ou desembarcadas. O teste de hipótese, aplicado em resultados citados por mais de 30% dos pescadores, demonstrou elevado grau de concordância entre o conhecimento ecológico local e a literatura científica, revelando o conhecimento detalhado que os pescadores possuem sobre os aspectos biológicos e ecológicos da sardinha e garapau. A captura de iscas em Fernando de Noronha mostrou-se de extrema importância, tanto para a relação com a pesca artesanal quanto para a manutenção dos saberes e da cultura local. Os resultados obtidos nesta pesquisa devem fomentar o diálogo necessário entre os pescadores e a gestão das unidades de conservação, a fim de criar mecanismos legais e efetivos para atender à demanda de iscas necessárias à atividade comercial e, ainda, à manutenção de um modelo de pesca artesanal sustentável para Fernando de Noronha

Fishers’ knowledge about fish trophic interactions in the southeastern Brazilian coast

Data derived from studies of fishers' local ecological knowledge (LEK) can be invaluable to the proposal of new studies and more appropriate management strategies. This study analyzed the fisher's LEK about trophic relationships of fishes in the southeastern Brazilian coast, comparing fishers' LEK with scientific knowledge to provide new hypotheses. The initial contacts with fishers were made through informal visits in their residences, to explain the research goals, meet fishers and their families, check the number of resident fishers and ask for fishers' consent to participate in the research. After this initial contact, fishers were selected to be included in the interviews through the technique of snowball sampling. The fishers indicated by others who attended the criteria to be included in the research were interviewed by using a semi-structured standard questionnaire. There were interviewed 26 artisanal fishers from three communities of the Ilhabela: Jabaquara, Fome and Serraria. The interviewed fishers showed a detailed knowledge about the trophic interactions of the studied coastal fishes, as fishers mentioned 17 food items for these fishes and six fish and three mammals as fish predators. The most mentioned food items were small fish, shrimps and crabs, while the most mentioned predators were large reef fishes. Fishers also mentioned some predators, such as sea otters, that have not been reported by the biological literature and are poorly known. The LEK of the studied fishers showed a high degree of concordance with the scientific literature regarding fish diet. This study evidenced the value of fishers' LEK to improve fisheries research and management, as well as the needy to increase the collaboration among managers, biologists and fishers

Aspectos biológicos e socioeconômicos da pesca esportiva no "Deck do Pescador" de Santos (SP, Brasil)

Sport fishing is one of the fastest growing leisure categories in today's world. In Brazil it is also practiced as a sport or leisure, noncommercial purposes. However, few studies are conducted in order to manage this activity in a sustainable manner. This study aimed to analyze sport fishing, practiced the "Fisherman’s Deck" (Santos, SP, Brazil), describing their biological characteristics and the socioeconomic profile of its participants. We interviewed 150 fishermen, aged between 12 and 82 years, 85% male. The majority (56%) has a college degree and resides near the fishing spot. The target species are swordfish (Trichiurus lepturus), bass (Centropomus spp.), Hake (Cynoscion spp.), betara (Menticirrhus americanus), corvina (Micropogonias furnieri) and hake-yellow (Macrodon atricauda). Three types of fishing, bottom fishing, surface and crab were identified. Fishermen indicated that fish stocks have declined due to increased commercial fishing and pollution. Each fishery lasted on average 5.0 (S.D.=2.1) hours and captured 850,8g (S.D.=962.5) g / angler / day. The estimated catch for the study period was 1314.8 (S.D.=1919.1) kg, representing less than 3% of fish landed by commercial fishing. Therefore, sport fishing from "Fisherman’s Deck" causes low impact to regional fish stocks

Recreational fishing in the Barra do Una Sustainable Development Reserve: subsidies for the integrated management of the Mosaic of Conservation Units Juréia-Itatins, São Paulo, Brazil

A pesca amadora é uma das atividades de lazer mais praticadas em todo o mundo e, no Brasil, é uma atividade socioeconômica relevante em diversas populações costeiras. A gestão desta prática deve conciliar o conhecimento tradicional, a pesquisa científica e as demandas envolvidas no uso do espaço e dos recursos pesqueiros para a geração de emprego e renda, sem prejuízos à biodiversidade. Este artigo apresenta uma análise da pesca amadora na Reserva de Desenvolvimento Sustentávelda Barra do Una por meio de dados primários, bibliográficos e resultados de oficinas participativas, visando gerar informações e discussões pertinentes à gestão pesqueira integrada no Mosaico de Unidades de Conservação Juréia-Itatins, litoral sul de São Paulo, sudeste do Brasil. Os principais serviços prestados à pesca amadora e estruturados no território são as atividades de guias de pesca ou piloteiros, comércio de iscas vivas e aluguel de barcos, enquanto a hospedagem e alimentação ainda requerem organização. Centropomus parallelus e C. undecimalissão espécies-alvo, e o perfil dos praticantes –sistematizado a partir da literatura científica – demonstra certos padrões relacionados a idade, tempo de pescaria e local de origem. Quanto ao uso do espaço, dos 40 pontos de pesca identificados, apenas nove utilizados por amadores se sobrepõem aos utilizados por pescadores artesanais, o que pode indicar pouca disputa pelos recursos entre as categorias de pescadores. A pesquisa científica, o engajamento dos gestores e a participação da comunidade local contribuíram para o ordenamento da pesca amadora na Reserva de Desenvolvimento Sustentável Barra do Una, demonstrando que a gestão participativa promoveu a interação entre os diferentes usuários dos recursos pesqueiros, favorecendo o desenvolvimento da pesca amadora e atendendo às expectativas socioeconômicas e culturais da comunidade local.Recreational fishing is one of the most popular leisure activities in the world and, in Brazil, it is a relevant socioeconomic activity in several coastal populations. The management of this practice must conciliate traditional knowledge, scientific research, and the demands involved in using space and fishing resources to generate employment and income, without harming biodiversity. This article presents an analysis of recreational fishing in the Barra do Una Sustainable Development Reserve by primary and bibliographic data and results of participatory workshops, aiming to generate information and discussions relevant to fisheries management integrated in the Juréia-Itatins Mosaic of Conservation Units, in the south coast of São Paulo, southeastern Brazil. The main services provided to recreational fishing and structured in the territory are the activities of fishing guides or pilots, trading live baits, and renting boats, while, accommodation and food still require organization. Centropomus parallelus and C. undecimalis are target species, and the profile of practitioners – systematized by the scientific literature – demonstrates certain patterns related to age, fishing time, and place of origin. As for the use of space, of the 40 identified fishing spots, only nine used by recreational fishermen overlap with the fishing grounds used by artisanal fishermen, which may indicate little competition for resources between the fishing categories. Scientific research, the engagement of managers, and the participation of the local community contributed to the organization of recreational fishing in the Barra do Una Sustainable Development Reserve, demonstrating that participatory management promoted interaction between the different users of fishing resources, favoring the development of recreational fishing, and meeting the socioeconomic and cultural expectations of the local community

Evolutionary history, biogeography, and a new species of Sphoeroides (Tetraodontiformes: Tetraodontidae): how the major biogeographic barriers of the Atlantic Ocean shaped the evolution of a pufferfish genus

ABSTRACT: Tetraodontidae is the most speciose family of Tetraodontiformes and is represented by fish popularly known as pufferfishes. They are characterized by modified jaws with four dental plates and the ability to inflate their bodies. Tetraodontids are distributed throughout the world and have a wide range of habitat use. One of its genera, Sphoeroides, shows a biogeographical pattern, with 19 of its 21 species restricted to coastal regions of the Americas. Although represented in large-scale phylogenies, the evolutionary history and biogeography of the genus have not been explored in detail. The present study aims to understand the historical and biogeographic processes that shaped the evolutionary history of Sphoeroides. Including samples from all biogeographic regions of its occurrence, we reconstruct a phylogenetic/biogeographic history hypothesis for the genus. Our results show that Sphoeroides is a paraphyletic group comprising Colomesus; indicate a central role of the biogeographic barriers of the Atlantic Ocean in the diversification of the genus; and identified a cryptic species in Brazilian waters, formally known as S. spengleri, described here through integrative taxonomy. We also propose nomenclatural changes given the position of Colomesus deeply nested within Sphoeroides.info:eu-repo/semantics/publishedVersio

Seascape genomics and phylogeography of the sailfish (Istiophorus platypterus)

Permeable phylogeographic barriers characterize the vast open ocean, boosting gene flow and counteracting population differentiation and speciation of widely distributed and migratory species. However, many widely distributed species consists of distinct populations throughout their distribution, evidencing that our understanding of how the marine environment triggers population and species divergence are insufficient. The sailfish is a circumtropical and highly migratory billfish that inhabits warm and productive areas. Despite its ecological and socioeconomic importance as a predator and fishery resource, the species is threatened by overfishing, requiring innovative approaches to improve their management and conservation status. Thus, we presented a novel high-quality reference genome for the species and applied a seascape genomics approach to understand how marine environmental features may promote local adaptation and how it affects gene flow between populations. We delimit two populations between the Atlantic and Indo-Western Pacific oceans and detect outlier loci correlated with sea surface temperature, salinity, oxygen, and chlorophyll concentrations. However, the most significant explanatory factor that explains the differences between populations was isolation by distance. Despite recent population drops, the sailfish populations are not inbred. For billfishes in general, genome-wide heterozygosity was found to be relatively low compared to other marine fishes, evidencing the need to counteract overfishing effects. In addition, in a climate change scenario, management agencies must implement state-of-the-art sequencing methods, consider our findings in their management plans, and monitor genome-wide heterozygosity over time to improve sustainable fisheries and the long-term viability of its populations.LA/P/0101/2020info:eu-repo/semantics/publishedVersio

Recreational fishing in the Barra do Una Sustainable Development Reserve: subsidies for the integrated management of the Mosaic of Conservation Units Juréia-Itatins, São Paulo, Brazil

A pesca amadora é uma das atividades de lazer mais praticadas em todo o mundo e, no Brasil, é uma atividade socioeconômica relevante em diversas populações costeiras. A gestão desta prática deve conciliar o conhecimento tradicional, a pesquisa científica e as demandas envolvidas no uso do espaço e dos recursos pesqueiros para a geração de emprego e renda, sem prejuízos à biodiversidade. Este artigo apresenta uma análise da pesca amadora na Reserva de Desenvolvimento Sustentávelda Barra do Una por meio de dados primários, bibliográficos e resultados de oficinas participativas, visando gerar informações e discussões pertinentes à gestão pesqueira integrada no Mosaico de Unidades de Conservação Juréia-Itatins, litoral sul de São Paulo, sudeste do Brasil. Os principais serviços prestados à pesca amadora e estruturados no território são as atividades de guias de pesca ou piloteiros, comércio de iscas vivas e aluguel de barcos, enquanto a hospedagem e alimentação ainda requerem organização. Centropomus parallelus e C. undecimalissão espécies-alvo, e o perfil dos praticantes –sistematizado a partir da literatura científica – demonstra certos padrões relacionados a idade, tempo de pescaria e local de origem. Quanto ao uso do espaço, dos 40 pontos de pesca identificados, apenas nove utilizados por amadores se sobrepõem aos utilizados por pescadores artesanais, o que pode indicar pouca disputa pelos recursos entre as categorias de pescadores. A pesquisa científica, o engajamento dos gestores e a participação da comunidade local contribuíram para o ordenamento da pesca amadora na Reserva de Desenvolvimento Sustentável Barra do Una, demonstrando que a gestão participativa promoveu a interação entre os diferentes usuários dos recursos pesqueiros, favorecendo o desenvolvimento da pesca amadora e atendendo às expectativas socioeconômicas e culturais da comunidade local

Cytogenotoxicity biomarkers in fat snook Centropomus parallelus from Cananéia and São Vicente estuaries, SP, Brazil

The aquatic environment receives many contaminants that can induce damages at the molecular, biochemical, cellular and physiological levels. Centropomus parallelus, an important food resource for local populations, is a predator fish that feeds on small fishes and benthic invertebrates, thus being vulnerable to the bioconcentration and biomagnification processes. This study aimed to evaluate cytogenotoxic responses in erythrocytes from C. parallelus juveniles collected in the Cananéia and São Vicente estuaries, both in winter and in summer. After anesthesia, blood samples were collected by caudal puncture. Blood smears were prepared on glass slides and stained with May-Grünwald-Giemsa dye. Two thousand cells were analyzed per slide (1000x), and nuclear abnormalities (NA) and micronuclei (MN) were scored. The São Vicente sample showed MN and NA frequencies (%/1000 cells) of 0.325 and 3.575, in winter, and of 0.125 and 2.935 in summer respectively; the Cananéia sample showed frequencies of 0.0325 and 0.03, in winter, and of 0.065 and 0.355 in summer, respectively. The rates found in São Vicente were significantly higher than those found in Cananéia, evidencing that the levels of pollution in that estuary were high enough to induce genetic damages

Genetic diversity in two threatened species of guitarfish (Elasmobranchii: Rhinobatidae) from the Brazilian and Argentinian coasts: an alert for conservation

The guitarfishes Pseudobatos horkelii and Pseudobatos percellens meet the criteria for threatened status as Critically Endangered (CR) and Endangered (EN), respectively. Both species occur in the Southern Atlantic Ocean. Considering the lack of data on the genetic structure of these species, the present study evaluated the genetic variability and population structure of the P. horkelii and P. percellens in the southern region of Brazil and the northern coast of Argentina, based on sequences of mitochondrial DNA, Control Region (D-loop). Samples of P. horkelii (n = 135) were analyzed in six localities situated in Northern Argentina, along the Brazilian states’ coast. The mean of nucleotide diversity was 0.0053, the ΦST was 0.4277 and demographic analysis of P. horkelii suggests the existence of stability of the populations, with D = 0.9929, FS = 2.0155, SSD = 0.0817, R = 0.2153. In P. percellens (n = 101) were analyzed from six Brazilian localities along the coast of Santa Catarina, Paraná, and São Paulo. The mean nucleotide diversity was 0.0014 and ΦST value of 0.2921, the demographic analysis indicates a high migration rate of P. percellens among the localities evaluated, with D = 0.5222, FS = 0.3528, SSD = 0.01785, R = 0.3890.As raias violas Pseudobatos horkelii e Pseudobatos percellens, são listados como “Criticamente em Perigo” (CR) e “Em Perigo” (EN), respectivamente. Ambas as espécies ocorrem no Sul do Oceano Atlântico. Considerando a falta de dados sobre a estrutura genética dessas espécies, o presente estudo avaliou a variabilidade genética e a estrutura populacional de P. horkelii e P. percellens na região sudeste do Brasil e litoral norte da Argentina, com base em sequências de DNA mitocondrial, região de controle (D-loop). Amostras de 135 indivíduos de P. horkelii analisados em seis localidades, situadas no norte da Argentina e ao longo da costa dos estados brasileiros. A média da diversidade nucleotídica foi de 0.0053, o índice ΦST foi de 0.4277 e a análise demográfica de P. horkelii, indicou a existência de estabilidade das populações, com D = 0.9929, Fus = 2.0155, SSD = 0.0817, R = 0.2153. Em 101 exemplares de P. percellens, foram analisados em seis localidades brasileiras ao longo do litoral de Santa Catarina, Paraná e São Paulo. A diversidade nucleotídica média foi de 0.0014 e o valor ΦST de 0.2921, a análise demográfica indicou uma alta taxa de migração de P. percellens entre as localidades analisadas, com D = 0.5222, FS = 0.3528, SSD = 0.01785, R = 0.3890.Fil: Cruz, Vanessa P.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Adachi, Aisni M. C. L.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Oliveira, Pablo H.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Ribeiro, Giovana S.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Paim, Fabilene G.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Souza, Bruno C.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Rodrigues, Alexandre S. F.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Vianna, Marcelo. Universidade Federal do Rio de Janeiro; BrasilFil: Delpiani, Sergio Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Díaz de Astarloa, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Rotundo, Matheus M.. Universidade Santa Cecília; BrasilFil: Mendonça, Fernando F.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Oliveira, Claudio. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Lessa, Rosangela P.. Universidad Federal Rural Pernambuco; BrasilFil: Foresti, Fausto. Universidade Estadual Paulista Julio de Mesquita Filho; Brasi