Fishers and groupers (Epinephelus marginatus and E. morio) in the coast of Brazil: integrating information for conservation.

BACKGROUND: Groupers are a vulnerable but economically important group of fish, especially for small-scale fisheries. We investigated catches and local ecological knowledge (LEK) of diet, habitat, and past fishing experiences. METHODS: Landings, prices, interviews, and restaurants demand for two species, Epinephelus marginatus (dusky grouper) and Epinephelus morio (red grouper), were registered. RESULTS: We visited 74 markets and 79 sites on the coast of Brazil in 2017-2018, and we interviewed 71 fishers: Bahia (NE), Rio de Janeiro and São Paulo (SE), and Santa Catarina (S). The landings sampled of dusky grouper (2016-2017) in Rio de Janeiro were: n = 222, size 38-109 cm, weight 1-24 kg, average 3.84 kg; in São Paulo, São Sebastião were: n = 47, size 39-106 cm, weight 2-8 kg, average of 2.77 kg; and at Santos: n = 80, 26-120 cm, weight 0.36-15 kg, average 2.72 kg. Red grouper was observed in markets in the northeastern Brazil. We did not observe Epinephelus marginatus from Bahia northward; a maximum size of 200 cm was reported south of the Bahia, besides Rio de Janeiro and São Paulo coasts, 20 years ago (or longer) by 12 fishers. Local knowledge of fishers was important for grouper data of habitat and diet; the reproduction period was identified by fishers as September to March. CONCLUSIONS: Groupers can be considered as a cultural and ecological keystone species. We suggest protective measures: 1) fishing zoning, 2) islands (MPAs) with the surveillance of fishers, 3) late Spring and early Summer as key periods for management (grouper reproduction), 4) studies on grouper larvae, 5) mapping of fishing spots, 6) studies on local knowledge. Collaboration with small-scale fishers and local knowledge could contribute to low-conflict management measures. In that regard, integrative models of management from Latin America, by using local knowledge and citizen science, could produce successful grouper management for Brazilian data-poor fisheries, a contrasting reality to the Mediterranean areas. Finally, the distribution of E. marginatus in Brazil leave us with questions: a) Have dusky groupers disappeared from Bahia because of a decline in the population? b) Was it uncommon in Northeast Brazil? c) Did changes in water temperatures forced a movement southward?

Checklist of marine demersal fishes captured by the pair trawl fisheries in Southern (RJ-SC) Brazil / Lista de peixes demersais marinhos capturados pela pesca de parelha no Sul (RJ-SC) do Brasil

Abstract: Demersal fishery resources are abundant on continental shelves, on the tropical and subtropical coasts, making up a significant part of the marine environment. Marine demersal fishery resources are captured by various fishing methods, often unsustainably, which has led to the depletion of their stocks. In order to inventory the marine demersal ichthyofauna on the Southern Brazilian coast, as well as their conservation status and distribution, this study analyzed the composition and frequency of occurrence of fish captured by pair trawling in 117 fishery fleet landings based in the State of São Paulo between 2005 and 2012. The ichthyofauna consisted of 245 species (81 families, 32 orders and 2 classes). Among the species, 50 species were classified as constant, 38 accessory and 157 accidental. Still, 13.47% of the species were listed as endangered; 35.29% of the Chondrichthyes and 11.85% of the Actinopterygii (15.1% of the total species) belong to the endemic fauna of the Biogeographic Province of Argentina. The richness was directly related to the oceanographic features of the study area, which determined the southern boundary of occurrence of several tropical species and the northern boundary of occurrence for temperate species. This is the region with the highest abundance of fishery resources in Brazil.

Resumo: Nas costas tropicais e subtropicais, sobre as plataformas continentais, os recursos pesqueiros demersais são abundantes e considerados uma parcela importante do ambiente marinho. Os recursos pesqueiros demersais marinhos são capturados por diversas modalidades de pesca, muitas vezes de forma insustentável, o que vem provocando o esgotamento de seus estoques. Com o objetivo de inventariar a ictiofauna demersal marinha da costa sudeste-sul do Brasil, assim como seu status de conservação e distribuição, foram analisadas a composição e frequência de peixes capturados em 117 cruzeiros de pesca entre 2005 e 2012 pela frota de arrasto de parelha sediada no Estado de São Paulo. A ictiofauna foi composta por 245 espécies (81 famílias, 32 ordens e 02 classes), sendo 50 consideradas como constantes, 38 acessórias e 157 acidentais; 13.47% apresentam algum grau de ameaça; 35.29% dos Chondrichthyes e 11.85% dos Actinopterygii (15.1% do total) pertencem à fauna endêmica da Província Zoogeográfica da Argentina. A riqueza observada está diretamente vinculada às características oceanográficas da área de estudo, sendo estas responsáveis pelo limite meridional de ocorrência de várias espécies tropicais e o limite setentrional de espécies de regiões temperadas. Esta é a região com maior abundância de recursos pesqueiros do Brasil.

Fishers' knowledge about fish trophic interactions in the southeastern Brazilian coast.

BACKGROUND: 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. METHODS: 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. RESULTS: 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. CONCLUSIONS: 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.

Folk taxonomy of fishes of artisanal fishermen of Ilhabela (São Paulo/Brazil) / Etnotaxonomia de peixes dos pescadores artesanais de Ilhabela (São Paulo/Brasil)

This article investigates the folk taxonomy of four artisanal fisheries communities in Ilhabela/SP. The local folk taxonomy shows how these fishermen identify, name and classify fish resources in the environment exploited by them. Forty-two fishermen from four different local communities of Ilhabela were interviewed through a structured questionnaire and photographs of fish species with occurrence for the southeast region of Brazil. Respondents identified the 24 species listed as 50 generic names and 27 binominal specific names, mainly related to aspects of fish species morphology such as color, shape and size. These fish were classified into eight groups according to local criteria related to the morphology, ecology and fishing forms associated with the capture of species. The morphological aspect was identified as the most used feature by respondents to name and classify local fish, followed by ecological aspects such as behavior, diet and habitat. The comparison of local criteria used for the groups was similar to the scientific taxonomy criteria, showing a detailed local ecological knowledge by this group of fishers.

Este artigo investiga a etnotaxonomia de quatro comunidades de pescadores artesanais de Ilhabela/SP. A etnotaxonomia mostra como esses pescadores, identificam, nomeam e classificam os recursos pesqueiros no ambiente explorado por eles. Quarenta e dois pescadores de quatro diferentes comunidades locais de Ilhabela foram entrevistados através de um questionário estruturado e fotografias de espécies de peixes de ocorrência para a região sudeste do Brasil. Os entrevistados identificaram as 24 espécies listadas através de 50 nomes genéricos e 27 nomes específicos binomiais, principalmente relacionados com aspectos morfológicos como forma, cor e tamanho. Estes peixes foram classificados em oito grupos de acordo com critérios locais relacionados com a morfologia, ecologia e técnicas de pesca associados à captura de tais espécies. O aspecto morfológico foi identificado como o fator mais utilizado pelos entrevistados para nomear e classificar as espécies de peixes, seguidos por critérios relacionados à ecologia das espécies tais como, dieta, comportamento e habitat. A comparação dos critérios locais utilizados para os grupos foi semelhante aos critérios científicos de taxonomia, mostrando um detalhado conhecimento ecológico local deste grupo de pescadores.

The use of fish in Ilhabela (São Paulo/Brazil): preferences, food taboos and medicinal indications / O uso de peixes em Ilhabela (São Paulo, Brasil): preferências, tabus alimentares e indicações medicinais

This study was conducted in three communities of artisanal fishermen from Ilhabela, located on the northern coast of São Paulo, Brazil. The objective was to analyze the preferences, taboos and medicinal indications of fish and thus representing one of the interactions of fishermen with fish stocks. Data collection was conducted through interviews with the aid of semi-structured questionnaires. We interviewed 25 families, 29 residents in three communities studied during our fieldwork for data collection. Five interviews were done in Jabaquara Beach, 6 in Fome Beach and 14 Serraria Beach. During the interviews, 18 species were cited as preferred for consumption, 11 species considered to be taboo (food prohibited), 5 species were cited as avoided as food, and 4 species indicated in case of illness. The families of fishermen prefer to consume finfish and do not consume puffer fish, the latter probably due to its toxic characteristic. Fish such as little tunny, largehead hairtail, shark, serra mackerel and king mackerel are avoided by unhealthy people and in cases of wounds, inflammation, pregnancy and postpartum. Other fish, such as sea chubs, silver porgy, bluefish and grouper are reported as medicinal in these situations. Aspects related to fish consumption are part of the knowledge of fishermen and their families and provide a wealth of information that combined to biological information is useful for the conservation of fishery resources. Data such as those presented in this study, regarding the use of aquatic animals for treatment of diseases, could serve as a basis for future studies on substances that contain active elements in curing diseases.

Este trabalho foi realizado em três comunidades de pescadores artesanais de Ilhabela, localizadas no litoral norte do Estado de São Paulo, Brasil. O objetivo foi analisar as preferências, os tabus e as indicações medicinais dos peixes e, desta forma, representar as interações dos pescadores com os recursos pesqueiros, visando entender os aspectos biológicos e culturais envolvidos. A coleta dos dados foi realizada através de entrevistas com o auxílio de questionários semi-estruturados. Foram entrevistadas 25 famílias, das 29 residentes nas três comunidades estudadas durante a coleta de dados, sendo que 5 delas foram realizadas na Praia do Jabaquara, 6 na Praia da Fome e 14 na Praia da Serraria. Foram citadas 18 consideradas preferidas para o consumo, 11 espécies consideradas como tabus, 5 espécies evitadas e 4 indicadas no caso de doenças. As famílias de pescadores preferem consumir peixes de escama e não consomem o baiacu, este último provavelmente devido a sua característica tóxica. Peixes como bonito, espada, cação, sororoca e cavala são evitados em casos como feridas, inflamações, gravidez e pós parto e outros como pirajica, marimba, anchova e garoupa são indicados como peixes medicinais nestas situações. Aspectos relativos ao consumo de pescado fazem parte do corpo de conhecimento dos pescadores e suas famílias e constituem um acervo rico de informações que somadas as informações biológicas são úteis para a conservação dos recursos pesqueiros. Dados como os apresentados nesse estudo, com relação ao uso de animais aquáticos para tratamento de doenças, podem servir de base para estudos futuros sobre substâncias que contenham elementos ativos na cura de doenças.