Download or read book Age Determination of Elasmobranchs with Special Reference to Mediterranean Species written by Steven E. Campana and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2014 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Age information is an essential component in growth rate, mortality rate and productivity calculations, hence it is classified among the most influential of biological variables. In this manual, the most recognized age determination methods for elasmobranchs have been brought together so as to provide a detailed and hands-on guide to successful and validated methods for ageing sharks, skates and rays. Particular emphasis is given to vertebral sections and image analysis techniques as applied to elasmobranch species from the Mediterranean Sea, suited to both novice and experienced age readers.
Download or read book Handbook on fish age determination a Mediterranean experience written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-05-31 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides guidance on methods for use in fish ageing studies. Fish age, among other biological parameters, is one of the most relevant pieces of data to attain sustainable exploitation levels of fishery resources. Indeed, most analytical methods used in stock assessment require knowledge of demographic structure according to age of stocks, as well as to recruitment, growth, maturity, natural mortality, etc., which are strictly linked to information on age and age structure. The handbook was put together to deal with identified gaps – which affect both the precision and the accuracy of estimations – regarding ageing schemes, criteria and methodologies used in preparing calcified structures. It focuses on the general principles that underpin age analysis (assignment of birth date, preparation methods, aging scheme reading and identification of true and false rings). Crucially, it aims to contribute to the establishment of common analysis methods, which can enable better calibration across the diverse institutes involved, thereby improving the quality and reliability of results.
Download or read book Northeast Pacific Shark Biology Research and Conservation Part A written by and published by Academic Press. This book was released on 2017-09-04 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Northeast Pacific Shark Biology, Research and Conservation, Part A, Volume 77 highlights the biological attributes of, and the conservation efforts targeted at, populations of vulnerable sharks in the Northeastern Pacific Ocean bordering the west coast of the United States, one of the most economically and ecologically important oceanic regions in the world. Updates in this new volume include chapters on Biodiversity, Conservation and Life History of Northeastern Pacific Chondrichthyans, a Review of current genetic analyses of Northeast Pacific sharks and conservation implications, and a section on the Trophodynamics and ecological impacts of eastern North Pacific sharks. - Brings together subject experts on all aspects of shark biology, ecology, fishery management and conservation - Summarizes current knowledge - Focuses scientific attention on key issues embedded in the concept of shark conservation, both from a species and an ecosystem perspective
Download or read book Elasmobranchs of the Mediterranean and Black Sea written by Mohamed Nejmeddine Bradai and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2012 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many fisheries they are, however, often landed and marketed.
Download or read book Studies and Reviews written by and published by . This book was released on 2014 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Management and Conservation written by III, William Hunter and published by CRC Press. This book was released on 2016-04-19 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title includes a number of Open Access chapters.Fisheries management and conservation draws on science in order to find ways to protect fishery resources so sustainable exploitation is possible. Modern fisheries management often involves regulating when, where, how, and how much fishermen are allowed to harvest to ensure that there will be fis
Download or read book Report of the Session written by General Fisheries Commission for the Mediterranean (Food and Agriculture Organization of the United Nations) and published by . This book was released on 2014 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management Techniques for Elasmobranch Fisheries written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2005 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elasmobranch - describes a group of fish without a hard bony skeleton, including sharks, skates, and rays.
Download or read book Elasmobranch Biodiversity Conservation and Management written by Sarah L. Fowler and published by IUCN. This book was released on 2002 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Darwin Elasmobranch Biodiversity Conservation and Management project in Sabah held a three-day international seminar that included a one-day workshop in order to highlight freshwater and coastal elasmobranch conservation issues in the region and worldwide, to disseminate the result of the project to other Malaysian states and countries, and to raise awareness of the importance of considering aspects of elasmobranch biodiversity in the context of nature conservation, commercial fisheries management, and for subsistence fishing communities. These proceedings contain numerous peer-reviewed papers originally presented at the seminar, which cover a wide range of topics, with particular reference to species from freshwater and estuarine habitats. The workshop served to develop recommendations concerning the future prospects of elasmobranch fisheries, biodiversity, conservation and management. This paper records those conclusions, which highlight the importance of elasmobranchs as top marine predators and keystone species, noting that permanent damage to shark and ray populations are likely to have serious and unexpected negative consequences for commercial and subsistence yields of other important fish stocks.
Download or read book Rapport de la Quinzi Session Du Comit Scientifique Consultatif written by General Fisheries Commission for the Mediterranean (Food and Agriculture Organization of the United Nations). Scientific Advisory Committee. Session and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2014 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scientific Advisory Committee (SAC) of the General Fisheries Commission for the Mediterranean (GFCM) held its fifteen session in Rome, from 8 to 11 April 2013. The Committee reviewed the issues addressed at the eight technical meetings, including the four sessions of its subcommittees, and at the workshops held during the 2012-2013 intersession.
Download or read book Field Identification Guide to the Sharks and Rays of the Mediterranean and Black Sea written by Fabrizio Serena and published by Food & Agriculture Org.. This book was released on 2005 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a fully illustrated field guide for the identification of the sharks and rays most relevant to the fisheries of the Mediterranean and Black Sea. An extensive literature review was carried out for the preparation of this document. A total of 49 sharks, 34 batoids and 1 chimaera are fully treated. The presence of 5 sharks and 2 batoids included in this field guide, need, however, to be confirmed. The guide includes sections on technical terms and measurements for sharks and batoids, and fully illustrated keys to those orders and families that occur in the region. Each species account includes: at least one annotated illustration of the species highlighting its relevant identification characters; basic information on nomenclature, synonyms and possible misidentifications; FAO common names; basic information on size, habitat and biology, distribution, importance to fisheries, and conservation and exploitation status.
Download or read book Ecosystem Effects of Fishing in the Mediterranean written by Sergi Tudela and published by Food & Agriculture Org.. This book was released on 2004 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the major impacts of fishing on the ecosystems recorded around the world occur in the Mediterranean. This variety of interactions is due to four main interrelated factors: the wide range of fishing gear and practices; very intensive fishing; a high diversity of exploited habitats, ranging from shallow water to the deep-sea and oceanic domain; and high biological diversity.
Download or read book Fishes of the Cambodian Mekong written by Walter J. Rainboth and published by Food & Agriculture Org.. This book was released on 1996 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This field guide covers the major resource groups likely to be encountered in the fisheries of the Cambodian Mekong. These groups include sharks, batoid fishes and bony fishes. The introduction outlines the geographical, environmental and ecological factors influencing fisheries, and the basic components of the fisheries of the Cambodian Mekong. As an aid to identification to higher taxonomic levels, a pictorial index to families and an illustrated guide to orders and families are included. Each species account provides scientific nomenclature, FAO names in English, local names, sizes, notes on fisheries, habitat and biology, and one or more illustrations. The guide is fully indexed and a list of related literature is appended. Finally, 27 colour plates are presented.
Download or read book The Elasmobranch Husbandry Manual written by Mark F. L. Smith and published by . This book was released on 2004 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlas of the maturity stages of Mediterranean fishery resources written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-04-15 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This atlas aims to present sound approaches to maturity sampling for a wide range of Mediterranean species – including bony fish, cartilaginous fish, both oviparous and viviparous, crustaceans and cephalopods – based on an accurate determination of the different maturity stages. It includes macroscopic photos of gonads belonging to the main species and, for some, a validation-based histological analysis.
Download or read book Marine Flora and Fauna of the Eastern United States written by Michael Vecchione and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cephalopods found in neritic waters of the northeastern United States include myopsid and oegopsid squids, sepiolid squids, and octopods. A key with diagnostic illustrations is provided to aid in identification of the eleven species common in the neritic waters between Cape Hatteras and Nova Scotia; included also is information on two oceanic species that occur over the continental shelf in this area and that can be confused with similar-looking neritic species. Other sections comprise a glossary of taxonomic characters used for identification of these species, an annotated systematic checklist, and checklists of the 89 other oceanic species and 18 Carolinian and subtropical neritic species that might occur occasionally off the northeastern United States.
Download or read book General Fisheries Commission for the Mediterranean Report of the twenty second session of the Scientific Advisory Committee on Fisheries online 22 25 June 2021 written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2021-12-29 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Scientific Advisory Committee on Fisheries (SAC) of the General Fisheries Commission for the Mediterranean (GFCM) held its twenty-second session online, from 22 to 25 June 2021. The session was attended by delegates from 19 Mediterranean contracting parties, 11 observers, as well as representatives of the Food and Agriculture Organization of the United Nations (FAO) Fisheries Division, the GFCM Secretariat and invited experts. The Committee reviewed the work carried out during the 2019–2021 intersession, including within the framework of the mid-term strategy (2017–2020) towards the sustainability of Mediterranean and Black Sea fisheries and in light of the COVID-19 pandemic, and provided advice on status of priority stocks and ecosystems and on potential management measures addressing key fisheries and vulnerable species in the Mediterranean. In line with the subregional approach, the Committee formulated advice focusing on: i) small pelagic and priority demersal fisheries in the Adriatic Sea; ii) common dolphinfish and blackspot seabream fisheries in the western Mediterranean; iii) small pelagic and bottom trawl fisheries exploiting demersal stocks, particularly European hake, in the central Mediterranean; iv) deep-water red shrimp fisheries in the eastern-central Mediterranean, including their interactions with vulnerable marine ecosystems; and v) round sardinella in the eastern Mediterranean. The Committee also agreed on the technical soundness of three FRA proposals for the Bari Canyon, the Ebro Delta margin and the Palmahim Disturbance, to be submitted to the Commission. At the regional level, the Committee provided advice on the following: i) fishing technology and bycatch, including minimal technical specifications for bottom-trawl nets and the need for targeted pilot projects to investigate possible mitigation measures; ii) data call for the database on sensitive benthic habitats and species and other effective area-based conservation measures for the protection of vulnerable marine ecosystems and essential fish habitats; and iii) advances in the adaptation strategy for climate change. Furthermore, the Committee discussed additional work in support of the GFCM, namely the implementation of the Regional Plan of Action for Small-Scale Fisheries in the Mediterranean and the Black Sea, dedicated research programmes as well as other activities to enhance fisheries management in the region. Finally, the Committee agreed upon its work plan for 2021–2023.
