خيارات البحث
النتائج 1 - 10 من 1,822
Small scale farmer adaptation to farmer's group development and good shrimp farm management practice | การปรับตัวของเกษตรกรขนาดเล็กในการพัฒนากลุ่มเกษตรกรและการปฏิบัติทางการจัดการฟาร์มกุ้งที่ดี
2015
Urairat Nethan(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Fisheries Management Department) | Jirarpast Adjimangkunl(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fisheries Management)
Community role in coastal resources management participation in Sam Roi Yod bay, Pranburi district, Prachuabkhirikhan province | บทบาทของชุมชนในการจัดการทรัพยากรชายฝั่งแบบมีส่วนร่วมพื้นที่อ่าวสามร้อยยอด อำเภอปราณบุรี จังหวัดประจวบคีรีขันธ์
2015
Monissa Srisomwong(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fisheries Management) | Jirarpast Adjimangkunl(Kasetsart University, Bangkok (Thailand). Faculty of Fisheries. Department of Fisheries Management)
Market Formalization, Governance, and the Integration of Community Fisheries in the Brazilian Amazon النص الكامل
2015
McGrath, David G. | Castello, Leandro | Almeida, Oriana T. | Estupiñán, Guillermo M. B.
Market Formalization, Governance, and the Integration of Community Fisheries in the Brazilian Amazon النص الكامل
2015
McGrath, David G. | Castello, Leandro | Almeida, Oriana T. | Estupiñán, Guillermo M. B.
A major trend in global trade in forest, animal, and agricultural products is the implementation of importation policies and development of private sector standards and certification mechanisms to promote the sustainable management of natural resources in the countries of origin. In many cases, ensuring sustainable origins involves requirements that small-scale rural producers and fishers cannot meet. This article investigates the formalization of community-based floodplain fisheries in the Brazilian Amazon, including (a) the development of federal and state fisheries management policies, (b) the parallel development of community management systems, and (c) the role of these processes in the evolution of fisheries management in the Lower Amazon region. We argue here that market-oriented solutions, such as third-party certification, are insufficient. Government support for and collaboration with producers and industry are essential to creating conditions that enable fishing communities to sustainably manage their fisheries.
اظهر المزيد [+] اقل [-]Market Formalization, Governance, and the Integration of Community Fisheries in the Brazilian Amazon النص الكامل
2015
oriana t. almeida | david g. mcgrath | guillermo m. b. estupiñán | leandro castello
A major trend in global trade in forest, animal, and agricultural products is the implementation of importation policies and development of private sector standards and certification mechanisms to promote the sustainable management of natural resources in the countries of origin. In many cases, ensuring sustainable origins involves requirements that small-scale rural producers and fishers cannot meet. This article investigates the formalization of community-based floodplain fisheries in the Brazilian Amazon, including (a) the development of federal and state fisheries management policies, (b) the parallel development of community management systems, and (c) the role of these processes in the evolution of fisheries management in the Lower Amazon region. We argue here that market-oriented solutions, such as third-party certification, are insufficient. Government support for and collaboration with producers and industry are essential to creating conditions that enable fishing communities to sustainably manage their fisheries | David G. McGrath, Leandro Castello, Oriana T. Almeida, Guillermo M. B. Estupiñán, 'Market Formalization, Governance, and the Integration of Community Fisheries in the Brazilian Amazon', Society & Natural Resources, vol. 28(5), pp.513-529, Informa UK Limited, 2015
اظهر المزيد [+] اقل [-]Market Formalization, Governance, and the Integration of Community Fisheries in the Brazilian Amazon النص الكامل
2015
McGrath, D. | Castello, L. | Almeida, O.T. | Estupiñán, G.M.B.
An Introduction to Free Geographic Information Systems in Fisheries Science النص الكامل
2015
Neely, Ben C. | Eder, Brandon L.
Geographic information systems (GIS) are powerful tools for analysis and interpretation of spatial data commonly encountered in fisheries science. We presented details of GIS use in fisheries management in a prior study and found cost to be a factor limiting GIS use. This article introduces fisheries managers to free or open-source GIS. Free or open-source GIS are readily available, powerful tools capable of performing a variety of spatial analyses. We strongly encourage managers wishing to perform spatial analyses, but who are unable to purchase software, to consider free GIS.
اظهر المزيد [+] اقل [-]Incorporating historical and ecological genetic data for leopard grouper (Mycteroperca rosacea) into marine reserve design in the Gulf of California النص الكامل
2015
Jackson, Alexis M. | Munguía-Vega, Adrian | Beldade, Ricardo | Erisman, Brad E. | Bernardi, Giacomo
Effective design of marine reserves for use in fisheries management and conservation requires a clear understanding of patterns of larval transport and sink-source dynamics between populations, as well as a clear understanding of population demography. Mitochondrial and nuclear markers were analyzed to investigate potential mechanisms impacting connectivity among and the demographic history of subpopulations of a commercially important species in the Gulf of California, the leopard grouper (Mycteroperca rosacea). Demographic history and connectivity analyses included a coalescent analysis, estimating neutrality indices, estimating global and pairwise F’ST, ΦST, or G’’ST, and a priori methodologies to identify genetically distinct units and barriers to dispersal. Average, long-term connectivity between geographic regions in the Gulf was also estimated. Divergence of mitochondrial lineages of leopard grouper dated to the late Pleistocene, with deep-water islands serving as demographically stable populations that may have acted as sources for new populations during periods of climate variability. Additionally, we observed genetically distinct units of leopard grouper in the Gulf, particularly between peninsular and mainland sites, as well as asymmetrical migration between the northern and central Gulf. Observed patterns of genetic differentiation are likely attributed to complex asymmetrical oceanographic currents and local larval retention. Based on our genetic findings and current fishing pressure in certain regions, we recommend implementing small, upstream no-take zones in the areas east of Isla Ángel de la Guarda, around Isla San Lorenzo and Isla San Esteban, and north of Isla Tiburón, that would enhance connectivity among subpopulations, preserve sites with high genetic diversity, and benefit fisheries downstream of these sites.
اظهر المزيد [+] اقل [-]Improving or overturning the ITQ system? Views of stakeholders in Icelandic fisheries النص الكامل
2015
Kokorsch, Matthias | Karlsdóttir, Anna | Benediktsson, Karl
Icelandic fisheries have gone through tremendous changes since the 1980s and the gradual implementation of individual transferable quotas. The paper investigates to what extent the power of different stakeholders in the fisheries management system has changed, and examines whether and in which fields enhanced participation is favoured by relevant stakeholder groups. Strengths and weaknesses of participation within the system are scrutinized and alternatives assessed. The analytical framework stems from the concept of adaptive co-management, whereas the empirical data derives from a survey on Icelandic fisheries management among important stakeholder groups. This survey showed that the critique of individual transferable quotas is not homogeneous. Regional differences are present regarding the evaluation of the current regime, but also of proposed alternative management instruments. Overall, more stakeholder participation, especially in data gathering and decision making, is demanded. This has in fact decreased over time. The authors suggest that the perceived shortcomings of the quota system in general and the lack of stakeholder participation in particular, can be addressed by adopting certain elements of adaptive co-management.
اظهر المزيد [+] اقل [-]Counting pirogues and missing the boat: Reply to Chaboud et al.’s comment on Belhabib et al. “Fisheries catch misreporting and its implications: The case of Senegal” النص الكامل
2015
Belhabib, Dyhia | Koutob, Viviane | Sall, Aliou | Lam, Vicky W.Y. | Zeller, Dirk | Pauly, D. (Daniel)
The job of fisheries scientists is to provide evidence that can be used for fisheries management both in tactical terms (i.e., from one year to the next) and strategically, in term of their broad orientations. Catch reconstructions, which consider all fisheries in a given area, can help with the latter, but they are often contested, as broad assumptions must often be made to reconcile and harmonize divergent data sets. Here, contraChaboud et al. (Comment on “Fisheries catch misreporting and its implications: The case of Senegal”) on Belhabib et al. (2013, 2014b), we justify the assumptions and methods we used, in close collaboration with Senegalese government agencies, to reconstruct the historic and current artisanal catch of Senegal and the illegal catch taken by foreign industrial vessels in Senegalese waters. This done, we argue that such work, rather than haggling about the number of pirogues deployed decades ago, is a current task of fisheries scientists working on Senegalese fisheries, and by extension, elsewhere in West Africa, where the conflict between artisanal and foreign industrial fisheries is most acute.
اظهر المزيد [+] اقل [-]Population dynamics and stock assessment of Colossoma macropomum caught in the Manacapuru Lake system (Amazon Basin, Brazil) النص الكامل
2015
Campos, C. P. | Costa Sousa, R. G. | Catarino, M. F. | Albuquerque Costa, G. | Freitas, C. E. C.
Colossoma macropomum is the second largest scaled fish in the Amazon basin. Reduced harvests in recent decades suggest that populations of this species are already overexploited in some areas. In this study, the population dynamics of C. macropomum was investigated using length and weight data for fish caught in the Manacapuru Lake system, a large ria lake located along the lower reach of the Solimões River. A total of 1270 individuals of C. macropomum with standard lengths varying from 17 to 62 cm and mean length of 31.0 ± 6.7 cm were sampled. Weights varied from 165 to 8195 g, and mean weight was 1148.3 ± 883.8 g. Maximum sustainable yield was estimated at 285.8 g recruit⁻¹, corresponding to a fishing mortality of 0.51 year⁻¹. A scenario analysis based on changes in fishing mortality and age at first capture, two parameters potentially addressed by fishing management strategies, suggested that any improvement in fishing yield depends on increases in age at first capture.
اظهر المزيد [+] اقل [-]Lake Nasser fisheries: recommendations for management, including monitoring and stock assessment النص الكامل
2015
Halls, A.S.
This study sought to improve the baseline knowledge of the fisheries of Lake Nasser and to make recommendations for the improved management of the fisheries, including stock assessment. The study included the review of key literature, visits to fisheries infrastructure and fishing camps, and individual consultations with the key stakeholders by means of semi-structured interviews, as well as a collective stakeholder consultation workshop. A preliminary stock assessment was also undertaken using the most recent time series of catch and effort estimates.
اظهر المزيد [+] اقل [-]Seychelles, a vulnerable or resilient sids? A local perspective النص الكامل
2019 | 2015
Philpot, Dean | Gray, Tim S | Stead, Selina M | Newcastle University | Newcastle University | Newcastle University | Newcastle University
This article analyses perceptions of residents of the Seychelles in the western Indian Ocean in relation to a long-running debate over small island developing states (SIDS) as to whether they are vulnerable or resilient. The results of data obtained from 25 key informant interviews and 70 household surveys conducted in 2013 showed that respondents perceived their country to be both vulnerable and resilient. Moreover, the data revealed that the relationship between vulnerability and resilience was complex, and that five interpretations of that relationship were evident: conflict, compromise, complementarity, symbiosis and transformation. Also, the conceptual distance between the two terms vulnerability and resilience was shown to be closer than may be commonly assumed. Finally, the paper questions whether the debate over vulnerability versus resilience is rightly confined to SIDS or could be equally applied to other states.
اظهر المزيد [+] اقل [-]