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  • Fisheries  (14,491)
  • 2020-2022  (14,417)
  • 2010-2014  (74)
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  • 1
    Publication Date: 2022-05-26
    Description: Author Posting. © John Wiley & Sons, 2010. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Aquatic Conservation: Marine and Freshwater Ecosystems 21 (2011): 17-27, doi:10.1002/aqc.1158
    Description: 1. Interactions between cetaceans and fishing activity in the Archipelago of the Azores were examined using information contained in grey literature and previously unpublished data collected by observer programmes and research projects from 1998 to 2006. Together with a brief description of the economics, gear, fishing effort, and past and ongoing monitoring projects, levels of cetacean bycatch and interference were reported for each major fishery. 2. Cetaceans were present in 7% (n=973) and interfered in 3% (n=452) of the fishing events monitored by observers aboard tuna-fishing vessels. Interference resulted in a significantly higher proportion of events with zero catches but it was also associated with higher tuna catches. 3. There was a decreasing trend in the proportion of tuna-fishing events with cetacean presence or interference throughout this study, as well as a reduction in the estimates of dolphins captured annually by the whole fleet. 4. Observers reported cetacean depredation in 16% of the sets for demersal species and in 2% of the sets for swordfish. Cetacean presence and depredation were associated with higher overall catches and higher catches per unit effort in demersal fisheries. Bottlenose dolphins (Tursiops truncatus) were responsible for most depredation events in demersal fisheries, whereas in the swordfish fishery, depredation was associated with the presence of killer whales (Orcinus orca). There were no reports of cetacean bycatch in these fisheries. There were also no reports of cetaceans interacting in the experimental deep-sea fisheries that were examined. 5. Available data suggests that levels of interaction between cetaceans and Azorean fisheries are generally low and that the economic impact of cetacean interference is probably small. However, for several traditional fisheries there are no accurate data to determine levels of cetacean interaction. We recommend that existing observer programmes be expanded to increase observer coverage of the demersal and swordfish fisheries and allow monitoring of other existing and emerging fisheries.
    Description: M.A.S. was supported by an FCT postdoctoral (SFRH/BPD/29841/2006) grant, and R.P. was supported by an FCT doctoral grant (SFRH/BD/32520/2006).
    Keywords: Cetacean–fisheries interactions ; Depredation ; Bycatch ; Fisheries ; Atlantic Ocean ; Azores
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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  • 2
    Publication Date: 2022-05-26
    Description: Author Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 310 (2006): 263-270, doi:10.3354/meps310263.
    Description: The longfin squid Loligo pealeii is distributed widely in the NW Atlantic and is the target of a major fishery. A previous electrophoretic study of L. pealeii was unable to prove genetic differentiation, and the fishery has been managed as a single unit stock. We tested for population structure using 5 microsatellite loci. In early summer (June), when the squids had migrated inshore to spawn, we distinguished 4 genetically distinct stocks between Delaware and Cape Cod (ca. 490 km); a 5th genetic stock occurred in Nova Scotia and a 6th in the northern Gulf of Mexico. One of the summer inshore stocks did not show genetic differentiation from 2 of the winter offshore populations. We suggest that squids from summer locations overwinter in offshore canyons and that winter offshore fishing may affect multiple stocks of the inshore fishery. In spring, squids may segregate by genetic stock as they undertake their inshore migration, indicating an underlying mechanism of subpopulation recognition.
    Description: We acknowledge funding from WHOI Sea Grant NA16RG2273, the Massachusetts Environmental Trust (#98-04), and the Sholley Foundation.
    Keywords: Fisheries ; Spawning migration ; Microsatellites ; Population structure ; Population recognition ; Null alleles
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 3
    Publication Date: 2022-05-26
    Description: Author Posting. © Foundation for Environmental Conservation, 2009. This article is posted here by permission of Cambridge University Press for personal use, not for redistribution. The definitive version was published in Environmental Conservation 36 (2009): 268-276, doi:10.1017/S0376892910000032.
    Description: No-take marine reserves are widely recognized as an effective conservation tool for protecting marine resources. Despite considerable empirical evidence that abundance and biomass of fished species increase within marine reserve boundaries, the potential for reserves to provide fisheries and conservation benefits to adjacent waters remains heavily debated. This paper uses statistical and population models to evaluate published empirical data on adult spillover from marine reserves and shows that spillover is a common phenomenon for species that respond positively to reserve protection, but at relatively small scales, detectable on average up to 800 m from reserve boundaries. At these small scales, local fisheries around reserves were likely unsustainable in 12 of 14 cases without the reserve, and spillover partially or fully offsets losses in catch due to reserve closure in the other two cases. For reserves to play a role in sustaining and replenishing larger-scale fished stocks, networks of reserves may be necessary, but as few exist this is difficult to evaluate. The results suggest reserves can simultaneously meet conservation objectives and benefit local fisheries adjacent to their boundaries.
    Description: Support was provided by a grant from the David and Lucille Packard Foundation to NCEAS for ecosystem-based management ofmarine systems, the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) funded by the David and Lucile Packard Foundation and the Gordon and Betty Moore Foundation (contribution number 348), the Sustainable Fisheries Group supported by the Paul G. Allen Family Foundation and the Bahamas Biocomplexity Project (US NSF Biocomplexity grantOCE-0119976) andUS EPA Science to Achieve Results (R832223).
    Keywords: Adult fish movement ; Fisheries ; Global ; Marine protected areas ; No-take reserves ; Spillover effect ; Synthesis
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 4
    Publication Date: 2022-05-25
    Description: Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Taylor & Francis for personal use, not for redistribution. The definitive version was published in Aquaculture Economics & Management 16 (2012): 167-181, doi:10.1080/13657305.2012.678551.
    Description: This study presents a framework for analyzing the interactions between aquaculture and capture fisheries in the context of ecosystem-based management. We extend a model of the economic and ecological systems in coastal New England by incorporating an aquaculture sector in a computable general equilibrium (CGE) model and by examining the forage fish and aquaculture link in a marine food web. We show that aquaculture and commercial fisheries interact in a complex way throughout the economic and ecological systems.
    Description: This work was supported by the NOAA Saltonstall-Kennedy Grant Program (Award No. NA09NMF4270097), the MIT Sea Grant College Program (NOAA Award No. NA10OAR4170086, Subaward No. 5710002974), and the Johnson Endowment of the WHOI Marine Policy Center.
    Description: 2013-06-08
    Keywords: Aquaculture ; Fisheries ; Ecosystem-based management ; CGE model ; Food web model ; Forage fish
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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  • 5
    Publication Date: 2022-05-25
    Description: Author Posting. © Ecological Society of America, 2013. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 23 (2013): 959–971, doi:10.1890/12-0447.1.
    Description: The biological benefits of marine reserves have garnered favor in the conservation community, but “no-take” reserve implementation is complicated by the economic interests of fishery stakeholders. There are now a number of studies examining the conditions under which marine reserves can provide both economic and ecological benefits. A potentially important reality of fishing that these studies overlook is that fishing can damage the habitat of the target stock. Here, we construct an equilibrium bioeconomic model that incorporates this habitat damage and show that the designation of marine reserves, coupled with the implementation of a tax on fishing effort, becomes both biologically and economically favorable as habitat sensitivity increases. We also study the effects of varied degrees of spatial control on fisheries management. Together, our results provide further evidence for the potential monetary and biological value of spatial management, and the possibility of a mutually beneficial resolution to the fisherman–conservationist marine reserve designation dilemma.
    Description: M. G. Neubert acknowledges the support of the National Science Foundation (DMS-0532378, OCE-1031256) and a Thomas B. Wheeler Award for Ocean Science and Society. H. V. Moeller acknowledges support from a National Science Foundation Graduate Research Fellowship. This research is based in part on work supported by Award No. USA 00002 made by King Abdullah University of Science and Technology (KAUST).
    Keywords: Bioeconomics ; Destructive fishing practices ; Fisheries ; Habitat damage ; Marine protected areas ; Marine reserves ; Optimal control ; Optimal harvesting ; Spatial management
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 6
    Publication Date: 2021-11-05
    Description: Los giros ciclónicos son lugares donde se concentra una gran cantidad de partículas suspendidas en la columna de agua, entre ellas el fitoplancton que es una parte importante de la cadena trófica. En el sur del golfo de México (GoM) la mayoría de la flota pesquera de altamar suele moverse entre sitios conocidos, debido a la concentración de organismos. Algunos de estos sitios se encuentran ubicados en el área de influencia del giro ciclónico de la bahía de Campeche. Usando datos de satélite de las corrientes geostróficas, se analizó la variación geográfica de la posición del giro de Campeche, con respecto a las zonas de pesca, para los meses de noviembre a febrero del 2014 al 2017. En el golfo de México el pez sierra (Scomberomorus maculatus o Spanish mackerel), que por su captura se localiza en el treceavo lugar a nivel nacional en México, reporta la mayor captura en la zona de Campeche. Esta especie, al igual que otros organismos marinos del sur del GoM, aprovechan de manera indirecta los nutrientes aportados por el giro de Campeche, el cual se desplaza de acuerdo con las condiciones oceánicas y atmosféricas de mesoescala, de ahí la importancia de conocer su ubicación para las pesquerías, tanto de altamar como artesanales. Por tal motivo en este trabajo se pretende describir la relación que existe entre el giro de Campeche, el cual aporta una gran cantidad de nutrientes y la captura del pez sierra.
    Description: Cyclonic gyres are places where a large amount of suspended particles are concentrated, among them the phytoplankton, an important piece of the trophic chain. In the southern Gulf of Mexico (GoM) most of the fishing fleet usually goes to well-known sites. Those are sites where the organisms use to concentrate. Some of these sites are located in the area of influence of the cyclonic gyre of the Bay of Campeche. Using satellite data of the geostrophic currents, we analyzed the geographical variation of the position of the Campeche gyre, with respect to the fishing areas, for the months of November to February 2014 to 2017. In the Gulf of Mexico, the sawfish (Scomberomorus maculatus or Spanish mackerel), which due to its capture is located in the thirteenth place at a national level in Mexico, reports the highest capture in the Campeche area. This species, as well as other marine organisms from the south of GoM, indirectly take advantage of the nutrients provided by the Campeche gyre, which moves according to the oceanic and atmospheric conditions of the mesoscale, hence the importance of knowing its location for fisheries, both offshore and artisanal. For this reason, this paper aims to describe the relationship between the Campeche gyre, which provides a large amount of nutrients, and the capture of sawfish.
    Description: Published
    Description: Refereed
    Keywords: Golfo de México ; Pesquerías ; Fitoplancton ; Variabilidad anual del giro de Campeche ; Gulf of Mexico ; Fisheries ; Phytoplankton ; Annual variability of the Campeche gyre
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.32-37
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  • 7
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    In:  http://aquaticcommons.org/id/eprint/7347 | 424 | 2011-12-09 14:37:33 | 7347 | Centre de Recherches Océanographiques, Côte d'Ivoire
    Publication Date: 2021-09-24
    Description: In the line of the Chalci campaigns 78-01 and 78-02, the aim of this campaign too was the trawl exploration of the Ivoirian continental shelf at the depth of 10 to 120 metres.
    Keywords: Fisheries ; Management ; Côte d'Ivoire ; Chalci campaign ; trawl exploration ; Ministère de la Recherche Scientifique de la République de Côte d'Ivoire ; ORSTOM
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
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  • 8
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    In:  http://aquaticcommons.org/id/eprint/7436 | 424 | 2015-05-30 17:30:17 | 7436 | Centre de Recherches Océanographiques, Côte d'Ivoire
    Publication Date: 2021-09-24
    Description: Beach surface temperature is recorded every morning between 7h30 and 8h00 at each coastal station. On figure 2, 3, 4 and 5 it has been plotted daily variation and mean variation computed on 7, 15 and 30 days basis of sea surface temperature. However it seems that variations of dynamic height anomaly are reflecting more accurately the stages of the coastal upwelling than the sea surface temperature.
    Keywords: Atmospheric Sciences ; Fisheries ; Cote d'Ivoire ; sea surface temperature variations ; coastal hydrological stations ; Ministere de la Recherche Scientifique de la Republique de Cote d'Ivoire ; Orstom
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
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  • 9
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    In:  http://aquaticcommons.org/id/eprint/7267 | 424 | 2015-05-30 17:23:40 | 7267 | Centre de Recherches Océanographiques, Côte d'Ivoire
    Publication Date: 2021-09-24
    Description: This publication gives the results of the bottom trawlings made during the cruises Togo 3 and logo 4 by the oceanographic research vessel "Andre NIZERY" on the continental shelf of Togo during the estimation program ofhalieutic resources.The report includes:1 - The report of the cruises Togo 3 and Togo 42 - Some information on the presentation of the results3 - The trawl recording cards for the 2 cruises4 - The length frequency distributions of the measured samples.
    Keywords: Fisheries ; Management ; Togo ; bottom trawl ; length frequencies ; stock assessment ; Centre de Recherches Oceanographiques ; Ministere de la Recherche Scientifique de la Republique de Cote d'Ivoire ; Orstom
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 33-75
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  • 10
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    In:  http://aquaticcommons.org/id/eprint/7434 | 424 | 2011-12-10 13:02:44 | 7434 | Centre de Recherches Océanographiques, Côte d'Ivoire
    Publication Date: 2021-09-24
    Description: One additional Chalci campaign that, in line with the previous Chalci campaigns 78-01, 78-02, and 79/01, has as its major objective the trawl exploration of the Ivoirian continental shelf at the depth of 10 to 120 metres.
    Keywords: Fisheries ; Management ; Côte d'Ivoire ; Chalci campaign ; trawl exploration ; Ministère de la Recherche Scientifique de la République de Côte d'Ivoire ; Orstom
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
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    Format: 1-178
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