Marine and Fishery Sciences (MAFIS)最新文献

{"title":"Side effects for batoids’ conservation in the vacuum of fishery management","authors":"Paulo Tarso Cunha Chaves, N. Wosnick","doi":"10.47193/mafis.3622023010501","DOIUrl":"https://doi.org/10.47193/mafis.3622023010501","url":null,"abstract":"A shift verified in batoid landings by artisanal fisheries during 2017-2021 is interpreted as a potential consequence of legal measures set by the Brazilian government in 2014. In this five-year period, the increasing landings of stingrays concomitant with a decrease in the landings of guitarfish might be a result of fishing bans established for the Brazilian guitarfish Pseudobatos horkelii and the Shortnose guitarfish Zapteryx brevirostris, which are both endemic to the coasts of Southern Brazil, Uruguay, and Argentina and listed as threatened at national and global levels. In 2022, more batoids became protected, so it is expected that shifts in captures will continue, reaching species whose stocks have not yet been evaluated and for which conservation measures are not foreseen. Considering the sociocultural and economic relevance of artisanal fisheries in the country, the observed shift is discussed here as it relates to batoids’ effective conservation and adherence to legal measures by the fishery sector in Southern Brazil.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114291969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoreo de contaminantes y detección de genes alkb en la Zona Común de Pesca Argentino-Uruguaya","authors":"S. R. Peressutti, P. A. Zorzoli","doi":"10.47193/mafis.3612023010109","DOIUrl":"https://doi.org/10.47193/mafis.3612023010109","url":null,"abstract":"En este estudio se determinó la presencia de diversos contaminantes en muestras de sedimentos en el Río de la Plata y la Zona Común de Pesca Argentino-Uruguaya (ZCPAU, 35° S-38° S). Además, se analizó la ocurrencia de genes alkB microbianos, utilizados como biomarcadores funcionales para determinar el potencial de degradación de hidrocarburos a lo largo de este ambiente marino. Se detectaron metales pesados en las estaciones UY1, RdP4 y AR2. El Cr se encontró en un rango entre < 5,0 y 20,7 mg kg-1, y el Pb entre no detectable (ND) y 26,0 mg kg-1. Tanto el Cd como el Hg mostraron valores por debajo de los límites de detección (< 0,2 mg kg-1 y < 0,01 mg kg-1, respectivamente). El Cu varió entre ND y 24,6 mg kg-1, y fue el único metal que sobrepasó los valores recomendados por la ISQG (Interim Sediment Quality Guideline), en los niveles guía en sedimentos para la protección de la biota (CCME, Canadian Council of Ministers of the Environment). Los valores de hidrocarburos, atrazina, glifosato + AMPA (ácido aminometil fosfónico) y pesticidas estuvieron por debajo del límite de cuantificación, mientras que los PCBs (desde < 20,0 a 77,7 µg kg-1) excedieron el nivel de acción A de las “Recomendaciones para la Gestión del Material de Dragado en los Puertos Españoles”. Se obtuvo ADN genómico microbiano purificado en ocho de las nueve muestras analizadas y se logró la amplificación del gen catabólico alkB en las estaciones UY2, UY1, RdP4, AR2 y AR1. Es necesario realizar estudios adicionales para evaluar el potencial de biodegradación microbiana en esta área. Estas investigaciones representan un valioso aporte para evaluar el impacto de las alteraciones antropogénicas sobre los ecosistemas marinos y para comprender los mecanismos de la atenuación natural.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124302385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphology of sagitta, lapillus and asteriscus of Patagonian Genidens barbus","authors":"María D. González Dubox, S. Córdoba Gironde, L. L. López Greco, A. Tombari","doi":"10.47193/mafis.3612023010107","DOIUrl":"https://doi.org/10.47193/mafis.3612023010107","url":null,"abstract":"Otoliths are calcium carbonate structures, deposited as aragonite, located in the inner ear of bony fish. In recent years, they have become a useful tool for the determination of fish species, trophic content, age studies, and the identification of fish stocks. The objective of this work was to describe the morphology of the three pairs of otoliths of the marine catfish Genidens barbus of Patagonian distribution. Otoliths of specimens obtained at four sampling points in the Negro River were analyzed. It was observed that otoliths presented the general morphological pattern proposed for Siluriforms, where lapilli are the largest and most robust of the three. Lapillus presented a rounded shape, a pronounced elevation in the central position, a delimited sulcus, but not very evident, without evidence of a minor sulcus. The sagitta is claviform, with an elongated conical posterior region, dorsal wings that continue as lateral expansions called basal wings, and the presence of a fissure. The asteriscus has an ear shape, a median opening, a short pointed rostrum, a poorly developed anti-rostrum and a slightly curved acoustic fossa. In this work, sagitta and asteriscus otoliths were described for the first time for G. barbus, thus completing the description of the three pairs.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122446131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversity of gastropods in Kapas Island, Indonesia","authors":"S. Laheng, Dwi Utami Putri, Ika Wahyui Putri, Miranti","doi":"10.47193/mafis.3612023010106","DOIUrl":"https://doi.org/10.47193/mafis.3612023010106","url":null,"abstract":"Gastropods are one of the constituents of benthic communities in waters and are found throughout the world, ranging from shallow, sandy, coral reefs to deep seas. Gastropods have several advantages, one of the most relevant is that they can be used as bioindicators of pollution. The purpose of this study was to determine the diversity and abundance of gastropods in Kapas Island, Indonesia. This research was conducted for two months on the coast of Kapas Island, Indonesia. Gastropod collection was carried out at 10 observation stations using three transect lines toward the sea and divided into three parts, namely upper intertidal, middle intertidal, and lower intertidal on each transect line. The distance between stations was ~ 150 m. Ninety plots of 1 m2 were set. Abundance and diversity were analyzed qualitatively. Results showed that gastropods consisted of 9 genera and 14 species. Among them, Cerithium sp. had the highest individual abundance (40.15%). The diversity index of gastropods in Kapas Island was 2.07 (medium diversity).","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127103763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparación de la estructura poblacional de abadejo (Genypterus blacodes) en la plataforma norpatagónica entre las estaciones de invierno y verano","authors":"Marina Sammarone","doi":"10.47193/mafis.3612023010105","DOIUrl":"https://doi.org/10.47193/mafis.3612023010105","url":null,"abstract":"En este estudio, se investigaron posibles diferencias en la estructura poblacional y rendimientos de abadejo (Genypterus blacodes) entre invierno y verano. Los datos fueron colectados durante campañas de investigación realizadas en el Atlantico sudoccidental durante el periodo 2000-2012. Se analizó la estructura de longitudes, proporción de juveniles, condición reproductiva y rendimientos medios de la población en ambas estaciones. En invierno la población estuvo caracterizada por juveniles, no fueron evidentes áreas de agregación para ninguna clase de longitud, y la condición reproductiva dominante fue el estadio inmaduro. Fue evidente cierto grado de segregación por tamaño en función de la profundidad, con los individuos más pequeños en aguas someras y los de mayor tamaño a mayor profundidad. En verano se observó una mayor proporción de adultos, fuertemente agregados entre 45°-48°S, en su mayoría reproductivamente activos y con una proporción importante de hembras en puesta en el sector 45°30’ y 47°30’ indicando la presencia de un área de desove. En ambas estaciones hubo una merma en los rendimientos medios, aunque esta fue más acentuada en los meses de invierno y estuvo acompañada de una marcada reducción en la longitud máxima. Esto podría deberse a cambios ambientales o ser consecuencia de la actividad pesquera.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125214504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Migration of artisanal fishers targeting small pelagics in West Africa: current trends and development","authors":"E. Dème, Yayo Amalatchy, Raul Thomas Jumpe, A. Fall, Waly Bocoum, M. Dème, P. Failler, Mohamed Amin Soumah, M. Sidibeh, Idrissa Diédhiou, S. Ahouansou Montcho, A. March, G. Touron-Gardic","doi":"10.47193/mafis.3612023010104","DOIUrl":"https://doi.org/10.47193/mafis.3612023010104","url":null,"abstract":"This study sought to present the evolutions and new trends of migrant fishing targeting small pelagics in West Africa from fishing to consumption stage. The work involved the characterization of migrant fishers targeting small pelagics in West Africa (country of origin, fishing gear and target species), modalities of access to resources, estimation of their catches and finally the assessment of the impact in the host countries. This work was useful to analyse changes in terms of the actors involved, the volumes and values of catches, and forms of valorisation and marketing of products from the migrant sectors over the period 2008-2018. Overall, the quantities of pelagic fish caught by migrant fishermen were increasing. The production of small pelagic by migrant fisheries has almost doubled over a decade, from an estimated of 180,000 t over the period 2008-2012, to a current estimated production of almost 324,500 t. More than 50% of this production was sold on the market in fresh or frozen form. More than 75,000 t (22%) and 94,000 t (28%) were destined for artisanal and industrial processing, respectively. Migrant fisheries thus supply more to industrial processing than to artisanal processing. Indeed, migrant fisheries have contributed over the last ten years to the emergence of fishmeal factories in West Africa. However, despite their significant evolution in terms of catch volumes and values, migrant fisheries still operate outside of legislative frameworks and without being explicitly accounted for in national statistics. Moreover, conflicts are increasingly important given the current tensions and issues surrounding the exploitation of small pelagic fish in West Africa. This work recommends the development of a common management plan for migrant fishers in the countries of the Sub-Regional Fisheries Commission (SRFC) and the West Central Gulf of Guinea Fisheries Committees (WCGC).","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"24 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131688207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age and growth of the red flounder Paralichthys orbignyanus (Teleostei: Pleuronectiformes) in southern Brazil","authors":"M. Haimovici, E. Kikuchi, C. Gonçalves Oliveira","doi":"10.47193/mafis.3612023010103","DOIUrl":"https://doi.org/10.47193/mafis.3612023010103","url":null,"abstract":"The red flounder Paralichthys orbignyanus is a large pleuronectiform fish endemic in coastal waters, coastal lagoons and estuaries in the southwestern Atlantic. Although less abundant than other Paralichthys spp, its high price makes it a valuable resource for small-scale fishers that have been intensely fished in the last decades. To study its growth and lifespan in southern Brazil, we examined thin otolith sections collected for age determinations of both young-of-the-year (YOY) and older fishes. Opaque bands form mainly in spring and summer, coincident with the reproductive season. Larger and older males reached 601 mm and eight years, while females reached 985 mm and 11 years. The assumed daily microincrements counts ranged from 127 to 196 for YOY of 135 to 184 mm TL. The common weight-length equation for grouped sexes was TW♀♂=0.000015TL2.93 (mm, g). The von Bertalanffy growth equations were: TL♀=1076(1–e–0.15 (t+0.78)); TL♂=652(1–e–0.28 (t+0.48)); and TL♀♂=839(1–e–0.20 (t+0.67)). Therefore, P. orbignyanus is a fast-growing and relatively short-living species for which females attain larger length and older ages than males, characteristics that have to be taken into account for its stock assessment and management.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132318977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beyond fishing: loggerhead turtle impalement by swordfish","authors":"F. N. Fiedler, G. Sales, R. Barreto, C. Nascimento, Bruno B. Giffoni","doi":"10.47193/mafis.3612023010102","DOIUrl":"https://doi.org/10.47193/mafis.3612023010102","url":null,"abstract":"Sea turtles are susceptible to a wide range of impacts. In Brazil, the loggerhead turtle Caretta caretta (Linnaeus, 1758) is the main sea turtle species caught incidentally by longline fishing fleets that target the blue shark Prionace glauca (Linnaeus, 1758) and swordfish Xiphias gladius (Linnaeus, 1758). The latter is well known for its predation strategy, which consists of using the rostrum to injure and catch prey. In this study, we recorded for the first time the impalement of a juvenile loggerhead sea turtle by a swordfish during a fishing operation of a Brazilian longline vessel in 2018. Two videos of this interaction were recorded by the shipmaster around 260 km from the Brazilian coast. The sea turtle was incidentally caught with a hook and subsequently attacked by the swordfish. The rostrum initially pierced the anterior left shoulder of the turtle and passed through the body, exiting from the right posterior carapace. Given the position of the attack, considerable internal damage was most certainly done to the turtle. Although the turtle was hauled aboard to remove the hook and then returned to the sea alive, it probably died due to the extent of the injuries caused by the rostrum having passed through the center of the body. Since both swordfish and turtle are pelagic and these interactions are poorly recorded, such encounters may be relatively common. Therefore, this type of information should be included in the data collection protocols of fishery monitoring programs to better understand and scale the bill-stab phenomenon, not only for sea turtles but also in relation to other groups of fauna.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128057333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Updates on putative bull shark (Carcharhinus leucas) occurrences in the upper Mississippi River Basin of North America","authors":"R. Shell, Nicholas Gardner, R. Hrabik","doi":"10.47193/mafis.3612023010101","DOIUrl":"https://doi.org/10.47193/mafis.3612023010101","url":null,"abstract":"A previous paper in this journal by Shell and Gardner assessed various factors around the exploration of the Mississippi River by bull sharks (Carcharhinus leucas Müller and Henle, 1839) based on two twentieth-century occurrences. Recent evidence has suggested one of these occurrences is a probable hoax. Here, we provide a correction to our earlier paper, as well as additional comments on extralimital euryhaline vertebrates in the Mississippi River system, the environmental and historical contexts for their exploration into riverine systems, and suggest steps for any future effort to detect the usage of these river systems by bull sharks.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132184184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microplastics found in the World Heritage Site Cocos Island National Park, Costa Rica","authors":"Angelica Astorga, Andrea Montero-Cordero, Geiner Golfín-Duarte, A. García-Rojas, Hannia Vega-Bolaños, Fausto Arias-Zumbado, Daniela Solís-Adolio, Karol Ulate","doi":"10.47193/mafis.3532022010907","DOIUrl":"https://doi.org/10.47193/mafis.3532022010907","url":null,"abstract":"Microplastics (MPs) defined as ‘small’ pieces of plastic < 5 mm have been found in almost every marine habitat around the world, and studies have shown that we can find them in the ocean surface, the water column, the seafloor, the shoreline, in biota and in the atmosphere-ocean interface. This study aimed to assess both marine and freshwater environments of Cocos Island, Costa Rica, in the Pacific Ocean, by sampling sediments and biota to determine the presence and abundance of this pollutant. Sediment samples were superficial and weighed one kilogram each. For the sampling of freshwater fish and shrimps, nonselective capture with small nets was made in rivers with access by land, while fishing rods were used for the marine fish sampling, and cage and scuba diving for lobsters. Plastics were found in all types of samples: 93% of marine sediments, 32% of freshwater sediments, 20% of freshwater fish, 15% of freshwater shrimps, 27% of marine fish, and 51% of marine lobsters. Like many reports around the world, it was expected to find MPs at marine samples, and it was concluded that ocean currents, tourism activities, and discarded fishing gear from illegal fishing activities could be the sources of marine pollutants. In contrast, the amount of MPs found in freshwater environments was not expected. Their possible sources are unclear at this moment.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116155280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}