Manual on Estimation of Selectivity for Gillnet and Longline Gears in Abundance Surveys

Manual on Estimation of Selectivity for Gillnet and Longline Gears in Abundance Surveys
Author: Holger Hovgêrd
Publisher: Food & Agriculture Org.
Total Pages: 96
Release: 2008-04-29
Genre: Technology & Engineering
ISBN: 9789250044613

This manual defines methods for estimating selectivity of gillnet and longline gears, with particular reference to the use of these gears in abundance surveys. The manual illustrates how gear design, the basic concepts of size selection and fish morphometric data can be used to model selectivity. Statistical estimation methods are described in detail, and examples given of their application in spreadsheets. The efficient use of these gears in abundance and research surveys is also discussed. Although the manual concentrates on gillnets and longlines, the methods given are general enough to be relevant to any research involving gear selectivity

Fishing with Bottom Gillnets

Fishing with Bottom Gillnets
Author: Ian Rosman MacDonald
Publisher: Food & Agriculture Organization of the UN (FAO)
Total Pages: 48
Release: 1980
Genre: Sports & Recreation
ISBN:

Behavior of Marine Fishes

Behavior of Marine Fishes
Author: Pingguo He
Publisher: John Wiley & Sons
Total Pages: 410
Release: 2011-06-09
Genre: Technology & Engineering
ISBN: 0470961767

BEHAVIOR OF MARINE FISHES BEHAVIOR OF MARINE FISHES: Capture Processes and Conservation Challenges Understanding fish behavior in relation to capture processes in marine fisheries is of fundamental importance to reducing bycatch and discards, and to enhancing marine fisheries conservation efforts. A thorough understanding of this allows commercial fishers to more effectively capture target species while reducing the catch of unwanted species. Behavior of Marine Fishes: Capture Processes and Conservation Challenges provides the reader with principles, patterns, and characteristics on fish behavior and fish capture processes using several types of important commercial fishing gears. The book also highlights conservation challenges facing the marine capture fisheries in efforts to maintain sustainable use of marine resources and to reduce negative impacts to the marine ecosystem. This volume, with contributions from leading applied fish behaviorists and fishing gear technologists from around the world, will be a valuable reference for researchers, fishing gear technologists, fisheries managers, students, and conservationists. SPECIAL FEATURES: Synthesis of current research and valuable knowledge that will help reduce bycatch and discards in commercial fisheries Review of basic fish behavioral principles and patterns and their relation to capture methods and conservation efforts Contributions from leading international applied fish behaviorists and fishing gear technologists

Flatheads and Spooneys

Flatheads and Spooneys
Author: Jens Lund
Publisher: University Press of Kentucky
Total Pages: 304
Release: 2021-10-21
Genre: Social Science
ISBN: 0813184770

Since the early 1800s, people have made a living fishing and harvesting mussels in the lower Ohio Valley. These river folk are conscious of an occupational and social identity separate from those who earn their living from the land. Sustained by a shared love of the river, deriving joy from the beauty of their chosen environment, and feeling great pride in their ability to subsist on its wild resources and to master the skills required to make a living from it, many still identify with the nomadic houseboat-dwelling subculture that flourished on the river from the early nineteenth century to the 1950s. Today's community of fisherfolk is small and economically marginal, but their activities sustain a complex set of traditional skills and a body of verbal folklore associated with river life. In Flatheads and Spoonies, Jens Lund describes the activities, boats, gear, verbal lore, and sense of identity of the fisher folk of the lower Ohio River Valley and provides historical and ethnobiological background for their way of life. Lund connects the importance of river fish in the diet of inhabitants of the valley to local fishing activities and explores the relationship between river people and those whose culture is primarily land-based, painting a colorful portrait of river fishing and river life. This book offers a look—historical and ethnographic—at a little-known aspect of traditional life in the American Midwest, still surviving today despite immense changes in environment, resources, and economic base.

Gillnet Hanging

Gillnet Hanging
Author: Paula Cullenberg
Publisher: University of Alaska Sea Grant
Total Pages: 20
Release: 1997-01-01
Genre: Fisheries
ISBN: 9781566120456

Gillnet Hanging, 1997 edition, is an illustrated, step-by-step guide for fishermen. Hanging a gillnet, which involves tying the web to the corkline and leadline, and customizing the net for a specific fishery, is critical to success in catching fish. Ideal companion to the Hanging a Gillnet video, MAPV-13.

A Gillnet's Drift

A Gillnet's Drift
Author: W.N. Marach
Publisher: Heritage House Publishing Co
Total Pages: 208
Release: 2014
Genre: Biography & Autobiography
ISBN: 1927527716

One Friday morning in the spring of 1972, an ad in the Vancouver Sun caught Nick Marach's eye: GILLNETTER FOR SALE. A young architect who had just returned to the west coast from a yearlong motorcycle trip abroad, Marach was not looking for a change of career-but he was looking for a boat to live on, and the price of the old gillnetter was cheap . A Gillnet's Drift takes the reader back to a time when the salmon runs on the BC coast were strong, and all it took to call oneself a commercial fisher was a boat, a net, and a licence. No experience was required. It was during this era that Nick Marach found himself, quite unexpectedly, with a new vocation and a new lease on life. For the next decade, he spent every salmon season navigating the waters off BC, following his bliss, and many times narrowly escaping with his life. Along the way he befriended a slew of colourful characters, met the love of his life, and somehow in the midst of it all still found the time to be an architect . This book captures the allure of the gillnetter's life in a bygone era, but it is also about the freedom of youth, the desire for self-expression, and the refusal to ever settle down completely, even when you have an office and a family waiting for you on dry land.

Catalogue of fishing gear in the Mediterranean and Black Sea region

Catalogue of fishing gear in the Mediterranean and Black Sea region
Author: Lucchetti, A., Petetta, A., Bdioui, M., Gökçe, G., Saber, M., Sacchi, J., Ozbilgin, H., Carlson, A., Carpentieri, P.
Publisher: Food & Agriculture Org.
Total Pages: 402
Release: 2023-10-30
Genre: Nature
ISBN: 9251380554

The wide variety of marine species of the Mediterranean and the Black Sea, found in different geographical subregions and habitats, has led to the development of a highly diversified fishing sector characterized by a broad range of fishing gear. Over time, harvesting marine resources has become more efficient due to a progressively improving understanding of the habits and behaviours of the various target species. In order to find ways to conserve fish resources and the marine environment, there is a need to further study these different types of fishing gear as well as to develop less impactful techniques. To this end, a comprehensive overview of fishing gear and methods in use in the Mediterranean and the Black Sea can facilitate the mitigation of incidental catch of vulnerable species, the mitigation of adverse impacts of fisheries on juvenile fish and discards, the decarbonization of fishing fleets through more energy efficient gear, the development of innovative gear to remove marine litter, and the reduction of lost, abandoned and otherwise discarded fishing gear, to name a few. This catalogue aims to provide such an overview and to describe the main technical characteristics and modes of use of fishing gear in operation in the region, considering specificities and differences not only at the regional level but also at the country and local levels.