Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 32
Filtrar
1.
J Fish Biol ; 2024 Apr 02.
Artigo em Inglês | MEDLINE | ID: mdl-38566266

RESUMO

This study aimed to understand the reproductive biology and migrative behavior of the largehead hairtail Trichiurus lepturus in a tropical area, specifically off Pernambuco coast, northeastern Brazil. Commercial catches from fish corrals provided samples for analysis, including measurements, weight recording, and examination of gonads to determine its maturation stage. Reproductive analyses were performed, such as sex ratio, gonado-somatic index, and sizes at first maturity. There was a slightly higher proportion of females among the 141 largehead hairtail specimens analysed. No significant differences were observed in length distributions between males and females. However, during the winter, significant differences were observed in length distributions for grouped sexes. The species exhibited a seasonal migratory pattern, with a higher presence on the continental shelf during the winter. The study identified strategic allocation of energy in feeding activities and temporal spacing of reproductive cycles, as indicated by the sex ratio and abundance of individuals during different seasons. Fish corrals probably do not harm largehead hairtail population off the southwestern Atlantic tropical coast, with minimal capture of individuals below the size of first maturity. The insights of the study into reproductive and migration patterns contribute to future assessments and management strategies for this species and corral fisheries.

2.
Mar Environ Res ; 192: 106211, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37801780

RESUMO

Artisanal fisheries, although considered less harmful, can still endanger marine ecosystems, especially in areas with long-standing tradition. In Cap de Creus, where artisanal fisheries has likely occurred for centuries, the status of benthic communities in fishing grounds was poorly understood. Through collaboration with local fishers, the benthic assemblages in three artisanal fishing grounds within Cap de Creus Marine Protected Area (MPA) were studied. Using video transects recorded by a remotely operated vehicle (ROV), the diversity and distribution of species were analysed in relation to substrate type, slope, and depth. The study also assessed the impacts on these communities by examining marine litter, lost fishing gear, and the condition of gorgonian populations. The findings identified three megabenthic assemblages and revealed higher fishing pressure and impact in the Maça d'Oros area, likely due to multiple fishing guilds converging. However, the study demonstrated lower impact in MPAs compared to unprotected Mediterranean areas, highlighting the importance of coastal management.


Assuntos
Ecossistema , Pesqueiros , Mar Mediterrâneo , Conservação dos Recursos Naturais
3.
Mar Environ Res ; 190: 106126, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37556886

RESUMO

The present study investigated the distribution and diversity of stationary fishing gears in Songkhla Lake and assessed the effects of the most abundant gear in the lake, the standing trap, on sedimentation and the abundance of benthic macroinvertebrates. Our survey revealed that six types of fishing gear were used: standing traps, fyke nets, fish aggregating devices, seabass net cages, small traps and stationary lift nets. The type of fishing gear used depended on the depth of water. The density of installed standing traps reached a maximum of 357 traps/km2, which was the highest density of any fishing gear installed on the lake. They were mainly set in the middle part of the lake, where the water was less than 2 m deep. Sedimentation was examined inside and outside the areas influenced by standing traps. Sediment samples were collected with sediment traps in the northeast and southwest monsoon seasons. Sedimentation rates inside and outside the areas influenced by standing traps differed at some sites but the pattern was not consistent across seasons. Sedimentation rates were higher in the northeast monsoon season with the average rate 1132.32 ± 43.73 (mean ± SE) g m-2day-1 when precipitation and run-off were higher and 323.98 ± 10.68 g m-2day-1 in the southwest monsoon or dry season. Moreover, the proportion of finer clay particles was greater in the sediment from the areas influenced by traps. Benthic macroinvertebrate communities between the two areas were different. A bivalve, Potamocorbula sp., which dominated benthic macroinvertebrate assemblages, had a higher abundance in areas influenced by traps. The effects of stationary fishing gears on sedimentation and benthic macroinvertebrates highlighted in this study suggest that the long-term deployment of these gears may affect food chain dynamics in this lagoon system. Ultimately, a proper regulation of the use of these gears may be needed.


Assuntos
Caça , Lagos , Animais , Tailândia , Cadeia Alimentar , Água
4.
Heliyon ; 9(7): e17858, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37456017

RESUMO

The extractive context of artisanal fishing in Ecuador is very broad and diverse considering the different fishing equipment that is used to capture a very varied set of species. As part of this broad sector, there is a small pelagic fishery, which is in the Crucita parish of the Portoviejo canton and is a long-standing and economically very relevant resource for the community. The objective of this article is to analyze the environmental and management aspects of this fishery as aspects relevant to achieving sustainable exploitation. To this end, information was collected from the beneficiaries of the purse-seine fishing fleet with the use of a structured questionnaire. The results revealed that there is widespread ignorance of the environmental aspects that affect the conservation of ecosystems and marine bioresources. On the other hand, the fishermen are aware of a general need to implement management measures that guarantee the sustainability of their fishing. However, they consider that the current regulations are not adapted to the current local context. Finally, from the perspective of those involved, the implementation of minimum capture sizes as a management measure could guarantee the sustainable capture of the species.

5.
Rev Fish Biol Fish ; : 1-18, 2023 Jan 03.
Artigo em Inglês | MEDLINE | ID: mdl-36620376

RESUMO

The growing focus on the blue economy is accelerating industrial fishing in many parts of the world. This intensification is affecting the livelihoods of small-scale fishers, processors, and traders by depleting local fishery resources, damaging fishing gears, putting fishers' lives at risk, and compromising market systems and value chain positions. In this article, we outline the experiences, perspectives, and narratives of the small-scale fishing actors in Ghana. Drawing on qualitative interview data, we examine the relationship between small-scale and industrial fisheries in Ghana using political ecology and sustainable livelihood approaches. We demonstrate how industrialised, capital-intensive fishing has disrupted the economic and social organisation of local fishing communities, affecting incomes, causing conflicts, social exclusion and disconnection, and compromising the social identity of women. These cumulative impacts and disruptions in Ghana's coastal communities have threatened the viability of small-scale fisheries, yet coastal fishing actors have few capabilities to adapt. We conclude by supporting recommendations to reduce the number and capacity of industrial vessels, strictly enforce spatial regulations, and ensure "blue justice" against marginalisation.

6.
Chemosphere ; 316: 137842, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36640983

RESUMO

This study assessed the effect of tourism and other recreational activities on microplastic (MP) levels and their characteristics in the sand and surf zone of the seawater. Six sites were chosen belonging to three sandy beaches with similar geomorphologic and morphodynamic characteristics but with different tourism activities. On average, a concentration of 1133.3 ± 811.3 items/kg dry weight (d.w.) and 12.7 ± 14.9 items/m3 were found in the sand and seawater samples, respectively. Fibers and films predominated and were less than 1 mm in length. In the sand, the films mainly matched the PE polymer spectra and the fibers matched PET polymer, cotton, and indigo blue dye; in the seawater samples, PP films and PET fibers prevailed. At the Pehuén-Co - Monte Hermoso Coastal Marine MPA where the flow of tourists is low, the MP levels were the lowest and the largest particles were found, mainly blue or black fibers, with less polymer diversity, cotton and PET being the most prevalent suggesting a recent input of textile fibers to this site. Moreover, the highest concentration of MPs was found on the southern site of a beach considered to be more pristine due to negligible human activity, including the smallest size pattern, mostly composed of white films or fibers with a greater diversity of polymers, predominantly PE > PET > PP. A great occurrence of PVC white films was also found in the surf zone at this site. Proximity to the mouth of a river, littoral drift, and other point sources were identified as the main sources, indicating that, apart from the local tourism and recreational activities, other sources might play a major role in the input of MPs to sandy beaches, such as extensive/intensive agricultural land use and irrigation areas.


Assuntos
Esportes , Poluentes Químicos da Água , Humanos , Microplásticos , Plásticos , Turismo , Areia , Monitoramento Ambiental , Poluentes Químicos da Água/análise , Praias
7.
Mali Med ; 37(1): 8-11, 2022.
Artigo em Francês | MEDLINE | ID: mdl-38196253

RESUMO

OBJECTIVES: to determine the mechanisms, lesions and hospital management of work-related accidentduringtraditional fishing,an activity subject to vital occupational risks. MATERIALS AND METHODS: Descriptive retrospective study on occupational injury files in artisanal fishing professions, registered at the Saint-Louis Regional Hospital (Senegal), from January 2014 to December 2019. All complete records of trauma during any activity related to artisanal fishingwereincluded. Data on accident mechanisms, injuries observed, and hospital management were collected. RESULTS: 47 male workers were on average 28.4 years old. Direct shock from a pirogue was most frequent (68.10%), followed by sharp or blunt objects (16.27%). The lesions were characterized by bone fractures in 63.83% of cases (n=30); chest-abdominal-pelvic and limb contusions and wounds represented 12.67% and 21.27% of cases, respectively. Medical management was done in 21 cases (44.7%). Surgery was dominated by intramedullary nailing in 15 cases (31.9%). Two laparotomies were performed with intestinal sutures. A chest contusion death was reported. CONCLUSION: Traumatic occupational risks in traditional fishing are life threatening. A better understanding of these risks and their consequencesmakes it possible to ensure good prevention.


OBJECTIFS: déterminer les mécanismes, les lésions et la prise en charge hospitalière des accidents de travail maritimes au cours de la pêche artisanale. MATÉRIEL ET MÉTHODES: Etude rétrospective descriptive sur les dossiers de traumatismes par accident de travail de la pêche artisanale, recensés au niveau du Centre Hospitalier Régional de Saint-Louis (Sénégal), de janvier 2014 à décembre 2019. Etaient inclus tous les dossiers complets de traumatisme au cours de toute activité liée à la pêche artisanale. Les données sur le mécanisme des accidents, les lésions constatées et la prise en charge hospitalière étaient recueillies. RÉSULTATS: il s'agissait de 47 travailleurs masculins âgés en moyenne de 28,4 ans.Les chocs directs par une pirogue étaient les plus fréquents (68,10%), suivis des objets tranchants ou contondants (16,27%). Les fractures étaient prédominantes dans 63,83% des cas (n=30) ; les contusions thoraco-abdomino-pelviennes et de membres ainsi que les plaies représentaient respectivement 12,67% et 21,27% des cas. Le traitement était médical dans 21 cas (44,7%). La chirurgie était dominée par l'enclouage centro-médullaire dans 15 cas (31,9%). Deux laparotomiesétaient effectuées avec sutures intestinales. Un décès par contusion thoracique était noté. CONCLUSION: les risques professionnels traumatiques dans la pêche artisanale engagent le pronostic vital. Une meilleure connaissance de ces risques par les travailleurs permet d'en assurer une bonne prévention.

8.
Mar Pollut Bull ; 172: 112905, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34523430

RESUMO

Although shark meat is consumed worldwide, elevated arsenic (As) concentrations have been increasingly reported. The Caribbean sharpnose shark (Rhizoprionodon porosus) is a widely consumed fishing resource in Brazil, with scarce information on As burdens to date. Herein, commercial-sized juvenile Caribbean sharpnose sharks from Rio de Janeiro (Brazil) were assessed in this regard, presenting significantly higher hepatic As concentrations in males (8.24 ± 1.20 mg kg-1 wet weight; n = 12) compared to females (6.59 ± 1.87 mg kg-1 w.w.; n = 8), and a positive correlation (r = 0.74) was noted between female muscle and liver As concentrations, indicating systemic inter-tissue transport not evidenced in males. Arsenic concentrations were over the maximum permissible As limit established in Brazilian legislation for seafood and calculated Target Hazard Quotients suggest consumption risks, although cancer risks were not evidenced. Therefore, Public Health concerns with regard to Caribbean sharpnose shark As burdens deserve careful attention.


Assuntos
Arsênio , Tubarões , Animais , Brasil , Feminino , Pesqueiros , Masculino , Alimentos Marinhos
9.
J Food Sci ; 86(7): 2939-2948, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34146418

RESUMO

Catfish (Sciades herzbergii) are widely captured in Brazilian Northeast but have low commercial value. The processing of catfish into an innovative product with longer shelf life can add value to the fish and improve sustainability. The objective of this study was to investigate the stability during 60 days of refrigerated storage smoked sausages produced by two different smoking processes (traditional smoking [TS] and liquid smoking [LS]). The smoking processes affected fat and ash contents, hardness, and CIE (Commission Internationale de L'Eclairage) color (L* and b* values). TS sausages had higher fat content and yellowness (b* value). LS sausages had higher ash content (15 days of storage) and lightness (L* value). The sausage's hardness was higher at 45 days of storage for TS and at 60 days for LS sausages. During refrigerated storage, there were decreases in crude protein (309.12-263.49 g/kg, 1-30 days, respectively), water holding capacity (89.77%-87.39%, 1-45 days, respectively), and redness (a* value) (10.35-6.09, 1-30 days, respectively), and increases in hardness (TS = 31.92-55.92 N, 1-45 days, respectively; LS = 32.88-61.18N, 160 days, respectively) and TBARS values (1.56-2.38 mg malonaldehyde/kg, 1-60 days, respectively). The microbial quality was kept within Brazilian legislation limits. Therefore, liquid smoked catfish sausage consists of a convenient innovative product, which is easier to process and control and provides a product with good physicochemical, microbial, and biochemical characteristics for up to 60 days of storage. PRACTICAL APPLICATION: Catfish, a low commercial value fish (by catch from shrimp operations), can be processed into a high value smoked sausage. Liquid smoking was easier to process, environment friendly, and easier to control compared to traditional smoking. It provided a nutritional, easy to prepare at home, and microbial safe product with a shelf life under refrigeration up to 60 days. It can be successfully used to warrant sustainability in the fish chain.


Assuntos
Produtos Pesqueiros/análise , Manipulação de Alimentos/métodos , Animais , Brasil , Peixes-Gato , Proteínas de Peixes/química , Manipulação de Alimentos/instrumentação , Armazenamento de Alimentos , Dureza , Refrigeração , Fumaça
10.
Environ Biol Fishes ; 104(3): 375-382, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33551541

RESUMO

Billfishes are considered important fishery resources and the identification of aggregation sites is imperative for proper management. Here we present evidence of a seasonal aggregation site for juvenile istiophorid billfishes in southern Brazil. We discuss the results as they relate with the need for management at a local scale and participatory monitoring with artisanal fishing communities as a way to ensure access to data on the occurrence and population status in the long term.

11.
Environ Monit Assess ; 193(2): 64, 2021 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-33447942

RESUMO

This work seeks to perform a baseline study to determine the implementation area for a management system of oily waste generated by artisanal fishing boats within the Peruvian context. This explanatory study, conducted based on quantitative and cross-sectional considerations, includes a regulatory review; content analysis of polynuclear aromatic hydrocarbons (PAH) and total petroleum hydrocarbons (TPH) both in seawater and sediments; and metal assessment in sediments and waste oil, with the corresponding result correlations. In this study, the results reveal that while regulations are adequate, their implementation is not evident. In addition, no evidence of contamination by PAH and TPH was found. However, traces of metal contamination were found in sediments, and, after being correlated with the metal values from waste oil, a Spearman's Rho correlation coefficient of 0.619480 was reported. Hence, we can conclude that the regulations to prevent marine pollution from oily waste contained in the International Convention for the Prevention of Pollution from Ships MARPOL agreement have been accepted and approved for implementation. In fact, they can even be applied to different activities that fall out of the scope of the agreement. Finally, the baseline study reveals oily waste generation indicators, as well as a correlation between waste oil metals and marine sediment metals that merits the implementation of an oily waste management system within the study area.


Assuntos
Petróleo , Hidrocarbonetos Policíclicos Aromáticos , Gerenciamento de Resíduos , Estudos Transversais , Monitoramento Ambiental , Sedimentos Geológicos , Petróleo/análise , Hidrocarbonetos Policíclicos Aromáticos/análise
12.
Mar Pollut Bull ; 164: 111984, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33517088

RESUMO

In August 2019, a major oil spill hit nine Brazilian coastal states, affecting marine ecosystems and fishing communities. In this study, we assess the immediate social and economic impacts of this oil spill on fishing communities of the northeast coast. We conducted semi-structured interviews and focal meetings with 381 fishers and shellfish gatherers to understand the perceived socioeconomic impacts on different types of fishing. We also obtained information on fish consumption after the oil spill, which we compared with data prior to the oil spill from the same communities. Sales decreased by more than 50% for all types of fishing, strongly impacting local income generation. These communities, which are already social-ecologically vulnerable, have had their subsistence, food security and cultural maintenance strongly compromised. We argue that there is a clear need for coordinated state interventions to mitigation the impacts, considering it's environmental, social, economic, human health and political dimensions.


Assuntos
Poluição por Petróleo , Animais , Brasil , Ecossistema , Pesqueiros , Humanos , Alimentos Marinhos
13.
rev. udca actual. divulg. cient ; 23(2): e1200, jul.-dic. 2020. graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1157029

RESUMO

RESUMEN La pesquería artesanal avanzada de lanchas "pargueras" que opera en el área norte del mar Caribe de Colombia ha experimentado grandes dificultades relacionadas con el volumen de los desembarcos, que han llevado al colapso económico de la flota. La disminución de la abundancia de los recursos ícticos ha ocasionado la expansión del área de pesca, el aumento en la duración del viaje de pesca, la disminución de los ingresos y el incremento de los gastos de operación. Existen vacíos en el conocimiento de la distribución espacial actual e histórica del esfuerzo pesquero de la flota, que no permiten asociarlos a los cambios en las abundancias, la composición de las capturas y la disminución de tamaños de las especies capturadas. Mediante entrevistas a pescadores y con la ayuda del conocimiento ecológico tradicional, el conocimiento local y el uso de sistemas de información geográfica, se mapeó la distribución espacial del esfuerzo pesquero y su comportamiento desde los años 70 hasta la actualidad. Como principal resultado, se evidenció un aumento promedio de 134,5km en la distancia del viaje de pesca en casi 50 años y cambios en el área y profundidades de pesca, que variaron desde los 27,8 a 1117,8km2 y de los 93,8 a 41,1m, respectivamente. Los resultados obtenidos constituyen insumos valiosos para la implementación de estrategias de manejo, orientadas a asegurar la sostenibilidad ecológica y la viabilidad económica de esta importante pesquería.


ABSTRACT The advanced artisanal fishery of fishing boats called "pargueras" that operates in the northern area of the Colombian Caribbean has experienced great difficulties related to the volume of landings that have led to the economic collapse of the fleet. The decrease in the abundance of fish resources has caused an expansion of the fishing area, increased duration of the fishing trip, decreased incomes and the increase in operating expenses. Existing knowledge gaps with respect to current and historical spatial distribution of the fleet's fishing effort prevent an association to changes in resource abundances, composition of catches and decreased species catch sizes. Through interviews with fishermen and based in traditional ecological knowledge, local knowledge and the use of geographic information systems, we mapped the spatial distribution of fishing effort and its inter-decadal behavior, from the 70s to present. The main result was a 134.5km increase in the distance of an average fishing trip in almost 50 years and changes in the surface area and fishing depths which varied from 27.8 to 1117.8km2 and 93.8 to 41.1m, respectively. The results obtained constitute valuable inputs for the implementation of management strategies aimed at ensuring the ecological sustainability and economic viability of this important fishery.

14.
Food Nutr Bull ; 41(4): 459-473, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-33078618

RESUMO

BACKGROUND: Families living from artisanal fisheries are vulnerable to food insecurity. OBJECTIVE: This research aimed to assess the determinants and consequences of food insecurity in artisanal fishing families from the coastal community of Sonora, Mexico, and to understand how these families face food insecurity. METHODS: This was a cross-sectional study with 116 mothers. A socioeconomic, demographic, and nutritional knowledge survey was applied to assess determinants. A survey about food in the community and food security scale were collected to evaluate food insecurity and two 24-hour dietary recalls and anthropometric measures to assess consequences. Field notes about facing food insecurity were collected. RESULTS: Sixty-eight percent of families have food insecurity. Being above the poverty line, higher father education, knowing how many glasses of water should be drunk per day, and how many minutes of physical activity should be done per day were associated with lower food insecurity. Not having medical service and lower mother education were associated with higher food insecurity. Higher food insecurity was associated with buying in a convenience store; higher food insecurity and higher mother education were associated with lower dietary score; and higher father education was associated with higher dietary score. Being below the extreme poverty line by income and number of children were associated with lower waist circumference; lower father education was associated with higher waist circumference of mothers. CONCLUSIONS: Artisanal fishing families residing in the coastal community of Sonora, Mexico, experience high food insecurity associated with social and economic determinants and their dietary quality.


Assuntos
Aquicultura , Dieta/estatística & dados numéricos , Insegurança Alimentar , Abastecimento de Alimentos/estatística & dados numéricos , Mães/estatística & dados numéricos , Adulto , Criança , Estudos Transversais , Características da Família , Feminino , Humanos , Renda/estatística & dados numéricos , Masculino , México/epidemiologia , Inquéritos Nutricionais , Valor Nutritivo , Pobreza/estatística & dados numéricos , Determinantes Sociais da Saúde/estatística & dados numéricos , Fatores Socioeconômicos
15.
Rev. MVZ Córdoba ; 25(2): 27-34, mayo-ago. 2020. graf
Artigo em Espanhol | LILACS | ID: biblio-1340770

RESUMO

RESUMEN Objetivo. Identificar nematodos de la familia Anisakidae en el pez de consumo Mugil curema. Materiales y métodos. Para este estudio, se recolectaron 16 peces Lisa (M. curema) del puerto de Tumaco, una ciudad en la costa colombiana del Pacífico. La identificación morfológica de las larvas se realizó mediante taxonomía clásica y se calculó el porcentaje de infestación de larvas. Para la identificación molecular, se realizó una PCR múltiple con cebadores para las especies Anisakis physeteris, Pseudoterranova decipiens, Anisakis simplex sensu stricto, Contracaecum osculatum, Hysterothylacium aduncum y Anisakis pegreffii. Resultados. La revisión taxonómica permitió la identificación de larvas de tipo II del género Anisakis y larvas del género Pseudoterranova. Las larvas se aislaron principalmente del intestino, donde se encontró que el 94% de los peces estaban parasitados por nematodos anisakidos. La PCR multiplex permitió la identificación de la especie A. physeteris (Larva tipo II) y P. decipiens. Conclusiones. Este estudio es el primer reporte de nematodo Anisakidae en Tumaco, Colombia. Estos resultados proporcionan una justificación convincente para un estudio adicional sobre la familia Anisakidae en Colombia, como un problema de salud pública.


ABSTRACT Objective: Identification nematodes Anisakidae family in Mugil curema fish. Materials and methods: For this study, 16 Lisa fish (Mugil curema) were obtained from the port of Tumaco, a city on the Colombian Pacific coast. Morphological identification of larvae was made by classical taxonomy and the percentage of larval infestation was calculated. For molecular identification, a multiplex PCR was carried out with primers for six species, Anisakis physeteris, Pseudoterranova decipiens, Anisakis simplex sensu stricto, Contracaecum osculatum, Hysterothylacium aduncum and Anisakis pegreffii. Results: The taxonomic revision enabled the identification of type II larvae of the genus Anisakis and larvae of the genus Pseudoterranova. The larvae were isolated mainly from the intestine, where it was found that 94% of the fish were parasitized by anisakid nematodes. The multiplex PCR enabled the identification of the species A. physeteris (Larva type II), and P. decipiens. Conclusions: This study is the first report of nematode Anisakidae on Tumaco, Colombia. These results provide a compelling justification for further study into the Anisakidae family in Colombia, as a public health problem.


Assuntos
Humanos , Animais , Parasitos , Zoonoses , Anisakis , Peixes , Pesqueiros
16.
J Fish Biol ; 97(3): 914-918, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32506649

RESUMO

This study describes a recreational fishing method focused on marine catfish, Genidens barbus (Endangered-EN), through the adoption of its eggs as a natural bait during its reproductive period in southern Brazilian ecosystems. Male G. barbus perform parental care, collecting eggs released by females after the fertilization process. Owing to this male behavioural pattern during the reproductive period, these individuals are easily caught in recreational fisheries that use eggs of the same species as a natural bait. The current adoption of G. barbus eggs as bait may intensify the fishing pressure on its populations.


Assuntos
Peixes-Gato/fisiologia , Pesqueiros , Óvulo , Animais , Brasil , Conservação dos Recursos Naturais , Ecossistema , Feminino , Pesqueiros/normas , Masculino , Reprodução/fisiologia , Comportamento Sexual Animal
17.
Neotrop. ichthyol ; 18(4): e200037, 2020. tab, graf
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1143344

RESUMO

In Brazil, the use and diversity of the common names of fish species, coupled with taxonomic uncertainties, hinder the reliability of fishing statistical data. In this scenario, there are the so-called pilombetas of the São Francisco River, an important fishing resource in region. Despite its importance, the real diversity of species identified in the area remains obscure. In order to properly identify and delimit the species popularly known as pilombetas, an integrative approach involving traditional taxonomy, geometric morphometrics and molecular systematics was applied. Results from geometric morphometrics and molecular analyses were consistent with the results of the traditional morphological analysis, also indicating the delimitation of six taxa belonging to Engraulidae in the lower São Francisco River. In addition, species delimitation methods revealed an intrapopulation genetic divergence of 1.7% for Lycengraulis grossidens. The results revealed that the currently known richness species of Engraulidae in the studied area has been underestimated. Thus, an updated taxonomic key is herein proposed for the Engraulidae species from the lower São Francisco River and estuary. The integrative analysis approach revealed to be effective to address taxonomic questions and help the management of stocks, ensuring the maintenance of local diversity of fishes in the Neotropical region.(AU)


No Brasil, o uso e a diversidade dos nomes comuns para espécies de peixes, associado a incertezas taxonômicas, dificultam a confiabilidade dos dados estatísticos da pesca. Nesse cenário, existem as chamadas pilombetas do rio São Francisco, um importante recurso pesqueiro da região. Apesar de sua importância, a real diversidade de espécies identificadas na área permanece obscura. Para identificar adequadamente as espécies conhecidas como pilombetas, uma abordagem integrativa envolvendo taxonomia tradicional, morfometria geométrica e sistemática molecular foi aplicada. Os resultados das análises moleculares e de morfometria geométrica foram consistentes com os resultados da análise morfológica tradicional, indicando também a delimitação de seis táxons pertencentes a Engraulidae no baixo São Francisco. Além disso, os métodos de delimitação de espécies revelaram divergência genética intrapopulacional de 1,7% em Lycengraulis grossidens. Nossos dados revelaram que a riqueza de espécies atualmente conhecida de Engraulidae na área estudada é subestimada. Assim, uma chave taxonômica atualizada é aqui proposta para as espécies de Engraulidae do baixo rio São Francisco e seu estuário. A abordagem de análise integrativa revelou ser efetiva para tratar de questões taxonômicas e ajudar no gerenciamento de estoques, garantindo a manutenção da diversidade local de peixes na região Neotropical.(AU)


Assuntos
Animais , Programas de Rastreamento , Pesqueiros , Peixes , Estuários , Rios
18.
J Ethnobiol Ethnomed ; 15(1): 70, 2019 Dec 23.
Artigo em Inglês | MEDLINE | ID: mdl-31870386

RESUMO

BACKGROUND: Historically, aquatic environments are linked to the worldview of many local people, where there is an interconnection between the natural world, the supernatural, and the social organization. In this study, we provided a discussion on how the supernatural beings that inhabit the freshwater systems interact with artisanal fishers and fishing resources in the riverine community of Parnaíba River middle course, in Mid North of Northeast Brazil. We also provided the implications of these interactions on the fisher's behaviors and how the acculturation process (e.g., introduction of new religions) can affect the fishers' worldview. METHOD: The selection of participants was done through intentional sampling. The content qualitative analysis was carried out to interpret the data from semi-structured interviews with 29 artisanal fishers. RESULTS: The mythical representations that inhabit the aquatic environments in the surveyed area were as follows: Mãe d' água, Cabeça de cuia, Muleque d'água, Visage, Piratinga, Sucuiuiu, and Luz e Arco-íris. These beings have distinctions regarding the form and attributions and can be associated with seasonality (temporal markers) and specific habitats (spatial markers). The respect and fear feeling of the mythical beings were striking among the fishers interviewed. For instance, we have record offering practices in order to obtain protection and success during the fisheries. These practices suggest that there may be local conservationist habits in fisheries management. However, the advancement of urbanization and the introduction of new religions that deny the existence of mythical entities are factors that can generate the acculturation process among the fishers. CONCLUSIONS: It is therefore necessary to carry out more studies in the surveyed area in order to evaluate the existence of possible patterns in the relationship between fisher and mythical beings. This information could confirm the role of mythical beings as environmental regulators. Consequently, it could be considered in the conservationist policies of fishery resources, reinforcing the importance of local knowledge and cultural factors for fishing management approaches.


Assuntos
Pesqueiros , Povos Indígenas , Criaturas Lendárias , Rios , Adulto , Idoso , Idoso de 80 Anos ou mais , Brasil , Conservação dos Recursos Naturais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
19.
Fractal rev. psicol ; 31(spe): 276-281, set.-dez. 2019. tab
Artigo em Português | LILACS, Index Psicologia - Periódicos | ID: biblio-1056220

RESUMO

Diante do cenário de crises e mudanças socioambientais, o objetivo é: (a) indicar a uma epistemologia ancorada na lente ecofeminista para entender as relações humanas e as relações com o ambiente em certo contexto social; (b) propor uma cosmovisão segundo a abordagem aqui denominada ecopsicossocial com base na compatibilidade e na complementaridade. A partir de uma pesquisa em andamento, cujo estudo de caso são as mulheres nas comunidades de pesca na região de Arraial do Cabo/RJ, o artigo apresenta uma revisão de documentos relativos à atividade, e análise qualitativa de depoimentos das mulheres da pesca no documentário Ardentia. Considerados os sentimentos e as ações das pescadoras - que, paulatinamente ultrapassam suas limitações na ação cotidiana e na reflexão constante sobre seu papel - conclui-se que o fazer feminino se articula na superação, na renovação e na reapropriação de um sentido que está sendo reinventado por elas: o lugar da mulher na pesca.(AU)


In view of the current scenery of crises and socioenvironmental changes, the goal is: (a) to indicate an epistemology anchored in the ecofeminist lens to understand human relationships and relationships with the environment in a certain social context; (b) to propose a worldview according to the approach here called na ecopsychosocial based on compatibility and complementarity. Based on an ongoing research, whose case studies are women in artisanal fishing communities in the region of "Arraial do Cabo/RJ", the article presents a review of documents related to the activity, and qualitative analysis of the documentary "Ardentia". Taken into account the feelings and actions of the fisherwomen - who gradually overcome their limitations through daily action and constant reflection about their role - the conclusion is that this feminine activity is overcoming, renewing, reappropriating and completely redefining women´s place in the fishing scenario. (AU)


Assuntos
Humanos , Feminino , Mulheres Trabalhadoras , Meio Ambiente , Pesqueiros
20.
Biota Neotrop. (Online, Ed. ingl.) ; 19(2): e20180620, 2019. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1001405

RESUMO

Abstract: The objective of this study is to describe the ethnoecological aspects, valorization, and commercialization of target species caught by artisanal fishers on the northern coast of Rio de Janeiro, southeastern Brazil. The data were obtained through semi-structured interviews conducted with 60 fishers from the fishing community of Guaxindiba (21°29'S, 41°00'W), which is associated with the Z-1 fishers' colony. Eighty-nine species were cited by the fishers and 44.1% are important commercial fish in the region. The fishers cited five distinct zones used to fish: border zone (68 species), estuary (41 spp.), artificial reef (27 spp.), "malacacheta" (24 spp.), and open ocean (10 spp.). The fishery resources were classified according to their gastronomic and economic characteristics: primary fish (35 spp.), secondary fish (32 spp.), mixed fish (10 spp.), discarded fish (7 spp.), and fish used as bait (5 spp.). The price of the target species increases along the production chain due to the greater number of people involved, processing costs, and improvement of the product. The data from this study can contribute to local fisheries management and point out to the use of artificial reefs in the maintenance of fishery resources in northern Rio de Janeiro.


Resumo: O objetivo desse estudo é descrever os aspectos etnoecológicos, a valoração e a forma de comercialização das espécies-alvo capturadas na pesca artesanal praticada na costa norte do Rio de Janeiro, sudeste do Brasil. Os dados foram obtidos a partir de entrevistas semiestruturadas realizadas com 60 pescadores da comunidade pesqueira Guaxindiba (21°29'S, 41°00'O), vinculados à colônia de pescadores Z-1. Oitenta e nove espécies foram citadas pelos pescadores e 44,1% desse total são importantes para o comércio da região. Os pescadores citaram cinco zonas distintas que são utilizadas para a pesca: zona da "borda" (68 espécies), estuário (41 spp.), recife artificial (27 spp.), "malacacheta" (24 spp.) e mar aberto (10 spp,). Os recursos pesqueiros foram classificados de acordo com suas características gastronômicas e econômicas: pescado-de-primeira (35 spp.), pescado-de-segunda (32 spp.), pescado-mistura (10 spp.), pescado-de-descarte (7 spp.) e pescado-isca (5 spp.). O preço das espécies-alvo aumenta ao longo da cadeia produtiva em decorrência do maior número de pessoas envolvidas, dos gastos com insumos e do processo de beneficiamento do pescado. Os dados desse estudo podem contribuir para o manejo da pesca local e apontam para o uso de recifes artificiais na manutenção dos recursos pesqueiros no norte do Rio de Janeiro.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...