Hugh Smith Lake Sockeye Salmon Stock Assessment, 2021
Hugh Smith Lake Sockeye Salmon Stock Assessment, 2021

Author: Teresa M. Fish

Publisher:

Published: 2022

Total Pages: 0

ISBN-13:

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In 2021, long-term population studies designed to evaluate adult sockeye salmon (Oncorhynchus nerka) abundance and juvenile production at Hugh Smith Lake continued. The smolt weir count of 9,000 sockeye salmon smolt was the lowest count on record. An estimated 75.7% of smolt were freshwater age-1, and 24.3% were freshwater age-2. Escapement was counted through a weir, a mark–recapture study was conducted to confirm the weir count, and biological data were collected to estimate the age, length, and sex composition of adult sockeye salmon returning to Hugh Smith Lake. The 2021 weir count of 3,235 adult sockeye salmon was below the optimal escapement goal range of 8,000–18,000 and was the 7th lowest escapement in the 1980–2021 data series. Age-1.3 fish were the most abundant age class, representing an estimated 73.8% of the total spawning population. Counts of live sockeye salmon in Buschmann Creek (not including mouth estimates) only exceeded 300 fish during 3 of 12 surveys from 20 August to 31 October (including a peak count 510 live fish on 14 September). Counts of live sockeye salmon in Cobb Creek peaked at only 40 fish on 13 September; most other counts were of 10 or less fish. Reported subsistence harvest was 111 fish, which accounted for an estimated 3.3% of the terminal run. The estimated minimum harvest rate in the District 101–108 commercial net fisheries was 79.3% in 2021.

Impacts of climate change on fisheries and aquaculture
Impacts of climate change on fisheries and aquaculture

Author: Food and Agriculture Organization of the United Nations

Publisher: Food & Agriculture Org.

Published: 2019-01-06

Total Pages: 654

ISBN-13: 9251306079

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This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.

Hugh Smith Lake Sockeye Salmon Stock Assessment, 2020
Hugh Smith Lake Sockeye Salmon Stock Assessment, 2020

Author: Teresa M. Fish

Publisher:

Published: 2022

Total Pages: 0

ISBN-13:

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In 2020, long-term population studies designed to evaluate adult sockeye salmon (Oncorhynchus nerka) abundance and juvenile production at Hugh Smith Lake continued. The smolt weir count of 16,000 sockeye salmon smolt was tied for the 2nd lowest count on record. An estimated 48% of smolt were freshwater age-1 and 52% were freshwater age-2. The escapement was counted through a weir, a mark–recapture study was conducted to confirm the weir count, and biological data were collected to estimate the age, length, and sex composition of the adult sockeye salmon escapement. The 2020 weir count of 3,860 adult sockeye salmon was below the optimal escapement goal range of 8,000–18,000 adult sockeye salmon and was the 9th lowest escapement since 1980. Age-2.2 fish were the most abundant age class, representing an estimated 40% of the total spawning population. Counts of live sockeye salmon in Buschmann Creek (not including mouth estimates) only exceeded 250 fish during 4 of 18 surveys from 19 August to 7 November (peak count 556 fish on 27 October). Counts of live sockeye salmon in Cobb Creek peaked at only 27 fish on 30 September and all other counts there were less than 20 fish. Reported subsistence harvest was 70 fish and accounted for an estimated 2% of the terminal run. The estimated minimum harvest rate in the District 101–108 commercial net fisheries was 38% in 2020.

Global Change in Marine Systems
Global Change in Marine Systems

Author: Patrice Guillotreau

Publisher: Routledge

Published: 2017-11-13

Total Pages: 336

ISBN-13: 1351672126

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Global Change in Marine Systems analyses and appraises societal and governing responses to change affecting marine social and ecological systems around the world. Acknowledging the stakes – local societies that depend on marine systems for food, livelihoods and wellbeing can suffer great hardship – this book highlights and explains similarities and distinctions between successful and unsuccessful responses. The book presents an analytical framework (‘I-ADApT’) that enables decision-makers to consider possible responses to global change based on experiences elsewhere. Here an international group of researchers from the natural and social sciences apply the ‘I-ADApT’ framework to twenty enlightening case studies, covering a wide range of marine systems challenged by critical global change issues around the world. The innovative research presented here guides marine system researchers, policymakers, decision-makers and practitioners in responding to global change in a timely and appropriate manner. It will appeal to students and researchers interested in environmental studies, natural resources, marine resources, environmental sociology, sustainability, and climate change.

Changing Tides
Changing Tides

Author: Barbara Neis

Publisher: Fernwood Publishing

Published: 2005

Total Pages: 324

ISBN-13:

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Fisheries are among the most globalized economic sectors in the world. Relying largely on wild resources and employing millions of people and feeding many millions more, fisheries provide a unique vantage point from which to view contemporary globalization, which is co-occurring with a major ecological revolution triggered by resource degradation and associated with the development of intensive aquaculture. Globalization is intensifying the export orientation and use of joint ventures between rich and poor countries in fisheries. International organizations such as the IMF are pressuring many debtor countries to exchange access to their fishery resources for access to foreign exchange, constraining their ability to limit external ownership and the export of resources, and threatening local fishery employment and food self-sufficiency. Changing Tides brings together contributions from researchers and community workers from 13 countries of the world. Juxtaposing academic case studies with accounts from activists and fisheries workers, this book points the ways in which globalization and associated resource degradation, privatization and the concentration of ownership and control in fisheries are jeopardizing the lives and livelihoods of women fish workers and their families.

Ecohydraulics
Ecohydraulics

Author: Ian Maddock

Publisher: John Wiley & Sons

Published: 2013-07-01

Total Pages: 659

ISBN-13: 1118526740

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Ecohydraulics: An Integrated Approachprovides a research level text which highlights recent developments of this emerging and expanding field. With a focus on interdisciplinary research the text examines:- the evolution and scope of ecohydraulics interactions between hydraulics, hydrology, fluvial geomorphology and aquatic ecology the application of habitat modelling in ecohydraulic studies state of the art methodological developments and approaches detailed case studies including fish passage design and the management of environmental flow regimes research needs and the future of ecohydraulics research The contributions offer broad geographic coverage to encapsulate the wide range of approaches, case studies and methods used to conduct ecohydraulics research. The book considers a range of spatial and temporal scales of relevance and aquatic organisms ranging from algae and macrophytes to macroinvertebrates and fish. River management and restoration are also considered in detail, making this volume of direct relevance to those concerned with cutting edge research and its application for water resource management. Aimed at academics and postgraduate researchers in departments of physical geography, earth sciences, environmental science, environmental management, civil engineering, biology, zoology, botany and ecology; Ecohydraulics: An Integrated Approach will be of direct relevance to academics, researchers and professionals working in environmental research organisations, national agencies and consultancies.

Historical Reconstructions of Marine Fisheries Catches: Challenges and Opportunities
Historical Reconstructions of Marine Fisheries Catches: Challenges and Opportunities

Author: Maria Lourdes D. Palomares

Publisher: Frontiers Media SA

Published: 2019-08-16

Total Pages: 175

ISBN-13: 2889459551

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.

Manual of Diagnostic Tests for Aquatic Animals
Manual of Diagnostic Tests for Aquatic Animals

Author:

Publisher:

Published: 2009

Total Pages: 0

ISBN-13: 9789290447580

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The purpose of this Manual of Diagnostic Tests for Aquatic Animals (Aquatic Manual) is to provide a uniform approach to the detection of the diseases listed in the OIE Aquatic Animal Health Code, so that the requirements for health certification in connection with trade in aquatic animals and aquatic animal products can be met. It includes bibliographical references and a list of the OIE Reference Laboratories for amphibian, crustacean, fish and mollusc diseases.