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Author: Anne Tessier
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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L’objectif de cette thèse a été d’étudier la nature et les causes de l’évolution spatio-temporelle du peuplement ichtyque des Récifs Artificiels (AR), d’analyser le rendement des captures des AR et de caractériser les usagers des AR, ainsi que leur perception vis-à-vis des AR. Trois localités de la région du Languedoc-Roussillon ont été étudiées. L’analyse de l’évolution spatio-temporelle du peuplement ichtyque montre une augmentation de la richesse spécifique avec l’âge de l’AR. La complexité de l’habitat est aussi un des facteurs agissant sur le peuplement ichtyque. Au niveau régional, le degré d’isolement semble influer sur l’assemblage ichtyque comme d’autres facteurs environnementaux (courant, apport nutritifs, etc.). L’étude des captures près des AR issues de pêches expérimentales indiquent que le rendement est meilleur dans un rayon de 300 m autour des AR pour l’ichtyofaune de roche et que les captures y sont équivalentes, voire supérieure, que sur les zones naturelles rocheuses. Les AR apparaissent donc comme pouvant maintenir la pêche artisanale. Les données issues de la réalisation d’entretiens semi-directifs indiquent une certaine satisfaction des patrons-pêcheurs artisanaux envers les AR pour le maintien de leur activité. D’autres usagers utilisent les AR mais leur fréquentation reste limitée mais cependant une possibilité d’évolution si les AR sont dans l’avenir repensés ou si les zones naturelles continues d’être dégradées. Il est donc essentiel pour l’aménagement des AR de tenir compte de facteurs intrinsèques et extrinsèques aux AR. Les considérations des divers usagers seront également à prendre en compte dans toute future gouvernance des AR.
Author: Anne Tessier
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
L’objectif de cette thèse a été d’étudier la nature et les causes de l’évolution spatio-temporelle du peuplement ichtyque des Récifs Artificiels (AR), d’analyser le rendement des captures des AR et de caractériser les usagers des AR, ainsi que leur perception vis-à-vis des AR. Trois localités de la région du Languedoc-Roussillon ont été étudiées. L’analyse de l’évolution spatio-temporelle du peuplement ichtyque montre une augmentation de la richesse spécifique avec l’âge de l’AR. La complexité de l’habitat est aussi un des facteurs agissant sur le peuplement ichtyque. Au niveau régional, le degré d’isolement semble influer sur l’assemblage ichtyque comme d’autres facteurs environnementaux (courant, apport nutritifs, etc.). L’étude des captures près des AR issues de pêches expérimentales indiquent que le rendement est meilleur dans un rayon de 300 m autour des AR pour l’ichtyofaune de roche et que les captures y sont équivalentes, voire supérieure, que sur les zones naturelles rocheuses. Les AR apparaissent donc comme pouvant maintenir la pêche artisanale. Les données issues de la réalisation d’entretiens semi-directifs indiquent une certaine satisfaction des patrons-pêcheurs artisanaux envers les AR pour le maintien de leur activité. D’autres usagers utilisent les AR mais leur fréquentation reste limitée mais cependant une possibilité d’évolution si les AR sont dans l’avenir repensés ou si les zones naturelles continues d’être dégradées. Il est donc essentiel pour l’aménagement des AR de tenir compte de facteurs intrinsèques et extrinsèques aux AR. Les considérations des divers usagers seront également à prendre en compte dans toute future gouvernance des AR.
Author: Ramos, Jorge H. P.
Publisher: IGI Global
ISBN: 1668423464
Category : Nature
Languages : en
Pages : 304
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Book Description
Among the most important reasons that artificial reefs have been created are the protection of the seabed with macroalgae, the possibility of improving fishing, and meeting the expectations and demands of tourists. Coastal managers have realized that it is important that artificial reefs are useful to people, especially local communities, and that it is therefore important that they are promoted by government entities for various professional and leisure activity use. Coastal managers must take this into consideration when reefs are designed. They must also define the ecosystem services they promote as well as the main uses for which the reefs are created. Impact of Artificial Reefs on the Environment and Communities presents insights on the connection between artificial reefs and the tourism industry in order to encourage the sharing of experiences and development of new innovative possibilities that create value for society. It presents the experiences, testimonies, and innovations of those who work closely with artificial reefs. Covering topics such as computational fluid dynamics, dive tourism, and Industry 4.0, this book is an essential resource for entrepreneurs, researchers, students and educators of higher education, coastal managers, government officials, leaders in tourism, engineers, and academicians.
Author: Jacques Bertrand
Publisher:
ISBN:
Category :
Languages : fr
Pages : 45
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Book Description
Author: General Fisheries Commission for the Mediterranean (Food and Agriculture Organization of the United Nations). Scientific Advisory Committee. Session
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 180
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Book Description
The Scientific Advisory Committee of the GFCM, in its twelfth session reviewed the activities and results obtained by its subsidiary bodies along with the proposals of the Coordinating Meeting of the Sub-Committees, as well as the achievements by the FAO regional projects in support of the GFCM activities. It further discussed several important topics including recreational fisheries, improvement of gear selectivity and reduction of bycatch, the impact of climate change, the impact of alien species on fisheries and other issues such as the exploitation of red corals, the status of elasmobranch species and the follow-up on fisheries-restricted areas. Le comite scientifique consultatif de la CGPM a examine les activites et les resultats obtenus par ses organes subsidiaires, la reunion de coordination des Sous-Comites ainsi que les realisations des projets regionaux de la FAO qui soutiennent les activites de la CGPM. Il a en outre discute de plusieurs sujets importants tels que la peche recreative, l'amelioration de la selectivite des engins et reduction des prises accessoires, l'impact du changement climatique, l'impact des especes non indigenes sur les pecheries et d'autres questions telles que l'exploitation du corail rouge, la situation des especes d'elasmobranches et le suivi des zones de peche a acces reglemente."
Author:
Publisher:
ISBN:
Category : Geology
Languages : fr
Pages : 564
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Author: Jacqueline Ki-Zerbo
Publisher: Univ of California Press
ISBN: 9780520066960
Category : History
Languages : en
Pages : 372
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Book Description
"This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309083400
Category : Science
Languages : en
Pages : 137
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Book Description
Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251337241
Category : Technology & Engineering
Languages : en
Pages : 172
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Book Description
This third edition of the State of Mediterranean and Black Sea Fisheries provides a comprehensive overview of the status of fisheries in the region, looking at their main features and trends, in order to better inform their management and better examine current and future challenges that they will face in the near future. The aim of this report is to produce a document that could provide useful analysis and direction for decision-making and future action. In this respect, this publication also represents a convenient source of information for the FAO Committee on Fisheries and offers a practical complement to the data provided in the State of World Fisheries and Aquaculture published by the FAO Fisheries and Aquaculture Department. This volume includes seven chapters divided into two sections: a first part on the status and trends of different aspects of Mediterranean and Black Sea fisheries, including fleet, catches, socio-economic variables and bycatch, and a second part that focuses on the management of Mediterranean and Black Sea fisheries, including an overview on small-scale fisheries. This report is based to a large extent on the most up-to-date data available submitted by GFCM contracting and cooperating non-contracting parties, including information on stock status, national catches, fleet and socio-economic information up to 2018. It is also complemented with information from other sources.
Author: Daniel Pauly
Publisher: Island Press
ISBN: 1610917693
Category : Nature
Languages : en
Pages : 519
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Book Description
The Global Atlas of Marine Fisheries is the first and only book to provide accurate, country-by-country fishery catch data. This groundbreaking information has been gathered from independent sources by the world's foremost fisheries experts. Edited by Daniel Pauly and Dirk Zeller of the Sea Around Us Project, the Atlas includes one-page reports on 273 countries and their territories, plus fourteen topical global chapters. Each national report describes the current state of the country's fishery; the policies, politics, and social factors affecting it; and potential solutions. The global chapters address cross-cutting issues, from the economics of fisheries to the impacts of mariculture. Extensive maps and graphics offer attractive and accessible visual representations.
Author: Tore S. Kristiansen
Publisher: Springer Nature
ISBN: 3030416755
Category : Science
Languages : en
Pages : 518
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Book Description
This book investigates how fish experience their lives, their amazing senses and abilities, and how human actions impact their quality of life. The authors examine the concept of fish welfare and the scientific knowledge behind the inclusion of fish within the moral circle, and how this knowledge can change the way we treat fish in the future. In many countries fish are already protected by animal welfare legislation in the same way as mammals, but in practice there is still a major gap between how we ethically view these groups and how we actually treat them. The poor treatment of fish represents a massive animal welfare problem in aquaculture and fisheries, both in terms of the number of animals affected and the severity of the welfare issues. Thanks to its interdisciplinary scope, this thought-provoking book appeals to professionals, academics and students in the fields of animal welfare, cognition and physiology, as well as fisheries and aquaculture management.
