Use Of Video Monitoring To Quantify Spatial And Temporal Patterns In Fishing Activity Across Sectors At Moored Fish Aggregating Devices Off Puerto Rico
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Use Of Video Monitoring To Quantify Spatial And Temporal Patterns In Fishing Activity Across Sectors At Moored Fish Aggregating Devices Off Puerto Rico
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Author : Wessley Merten
language : en
Publisher:
Release Date : 2018
Use Of Video Monitoring To Quantify Spatial And Temporal Patterns In Fishing Activity Across Sectors At Moored Fish Aggregating Devices Off Puerto Rico written by Wessley Merten and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
A key challenge in small-scale fisheries that use moored fish aggregating devices (mFADs) is the ability to accurately quantify multi-sector fishing activity through fishery-independent methods. Here, we present a novel fishery-independent assessment of multi-sector fishing activity associated with a newly developed open access mFAD programme off San Juan, Puerto Rico. We identified three fishing sectors (recreational, charter and commercial) and 158 individual fishing vessels that routinely operated in the vicinity of the mFADs. The results indicate that daytime fishing activity varied by time of day, day of week, location and sector. During fishing tournaments, the data revealed that fishing activity increased threefold; across monitoring periods, for-hire charter vessels were the most consistent day-to-day user segment, and recreational activity peaked on weekends. Our study represents a new technique for rapidly identifying and detecting multi-sector fishing activity near mFADs and highlights the potential to gather comparable data wherever mFADs are deployed. The results are used to discuss how this technique can be used to assess the performance of mFADs to identify sector overlap and guide management in determining deployment patterns and facilitate the design of cost-effective surveys to estimate mFAD vessel activity, and potentially catch, of mFAD-associated species.
Survey Manual For Tropical Marine Resources
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Author : Susan Anne English
language : en
Publisher:
Release Date : 1997
Survey Manual For Tropical Marine Resources written by Susan Anne English and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Ecological assessment (Biology) categories.
The Ecosystem Approach To Fisheries
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Author : Gabriella Bianchi
language : en
Publisher:
Release Date : 2008
The Ecosystem Approach To Fisheries written by Gabriella Bianchi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
The ecosystem approach to fisheries management is high on national, regional and international agendas for sustainable fisheries management. Implementing the Ecosystem Approach to Fisheries covers both theoretical and applied aspects, with a particular emphasis on practical experiences in the form of case studies from around the world, and tools for solutions.
Landscape Ecological Analysis
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Author : Jeffrey M. Klopatek
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Landscape Ecological Analysis written by Jeffrey M. Klopatek and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Studies in landscape ecology focus on the effect of heterogeneity on ecosystem structure and function. Vigorous growth in the field has included the development of methods and results that can be applied to an impressive range of environmental issues. The purpose of this book is to provide the reader with a current perspective on this rapidly developing science. This book features contributions by internationally renowned experts in the field that address a broad spectrum of political, theoretical and applied aspects of the subject. Chapters describe a number of methods and models that are used at landscape and regional scales within the context of ecosystem management, to assess changes in biodiversity, and to evaluate sustainable landscape planning for cultural as well as natural settings. Also included are instructional models to assist in teaching.
The Ocean And Cryosphere In A Changing Climate
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Author : Intergovernmental Panel on Climate Change (IPCC)
language : en
Publisher: Cambridge University Press
Release Date : 2022-05-19
The Ocean And Cryosphere In A Changing Climate written by Intergovernmental Panel on Climate Change (IPCC) and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-19 with Science categories.
The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for assessing the science related to climate change. It provides policymakers with regular assessments of the scientific basis of human-induced climate change, its impacts and future risks, and options for adaptation and mitigation. This IPCC Special Report on the Ocean and Cryosphere in a Changing Climate is the most comprehensive and up-to-date assessment of the observed and projected changes to the ocean and cryosphere and their associated impacts and risks, with a focus on resilience, risk management response options, and adaptation measures, considering both their potential and limitations. It brings together knowledge on physical and biogeochemical changes, the interplay with ecosystem changes, and the implications for human communities. It serves policymakers, decision makers, stakeholders, and all interested parties with unbiased, up-to-date, policy-relevant information. This title is also available as Open Access on Cambridge Core.
The National Action Plan To Conserve Coral Reefs
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Author : United States Coral Reef Task Force
language : en
Publisher:
Release Date : 2000
The National Action Plan To Conserve Coral Reefs written by United States Coral Reef Task Force and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Coral reef conservation categories.
Stock Assessment In Inland Fisheries
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Author : Ian G. Cowx
language : en
Publisher: Wiley-Blackwell
Release Date : 1996-04-11
Stock Assessment In Inland Fisheries written by Ian G. Cowx and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-04-11 with Technology & Engineering categories.
Based on an international symposium and workshop hosted by the University of Hull International Fisheries Institute, this new reference includes expert reviews of the advantages and shortcomings of all current techniques and management strategies used in assessment of freshwater fish stocks worldwide. In addition to the core reports, overview papers present a summary of the current status of our knowledge in each of the major subject areas, with a final chapter appraising present and future perspectives on the concept of stock assessment. All contributions are fully illustrated and referenced. Stock Assessment in Inland Fisheries is likely to become the international, standard reference for all fisheries departments--offering a single source of contemporary and definitive information. Moreover, it is also intended to serve as a course text for students learning about freshwater-fisheries management.
Principles And Methods In Landscape Ecology
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Author : Almo Farina
language : en
Publisher: Springer
Release Date : 2023-05-27
Principles And Methods In Landscape Ecology written by Almo Farina and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-05-27 with Science categories.
This third, thoroughly updated edition of a well received book, presents the most complete collection of theories, paradigms and methods utilized by the landscape sciences. With the introduction of new ecosemiotic concepts and innovative managing procedures, it offers a broad list of ecological, ecosemiotical and cultural tools to investigate, interpret and manage the environmental complexity according to a species-specific individual-based approach. Readers will discover the importance of a landscape perspective to create strategic bridges between science and humanities favored by the holistic sight of sensorial (visual, acoustic, olfactory, tactile, and thermal) “scapes”. Distributed in 10 chapters, the content covers many aspects of the landscape sciences ranging from the description of fundamental theories, principles and models originated by ecological approaches like source-sink models, island biogeography, hierarchical theory and scale. The ecosemiotical approaches like the eco-field model, the ecoscape paradigm, and the general theory of resources are widely described and discussed. A cultural approach to landscape is utilized to focus on the heritage values of territories and their environmental identity. This book, written in an accessible and didactic style, is particularly dedicated to undergraduate and graduate students but also scholars in ecology, agroforestry, urban planning, nature design, conservation and remediation. Land practitioners, farmers and policymakers can use this book as an authoritative guide to better understand the function and role of environmental systems according to a social-economic integrated perspective.
Characterization Of The Spatial And Temporal Dynamics Of Drifting Fish Aggregating Devices Fads Used By The French Fleet Of Purse Seiners In The Atlantic And Indian Oceans
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Author : Alexandra Maufroy
language : en
Publisher:
Release Date : 2012
Characterization Of The Spatial And Temporal Dynamics Of Drifting Fish Aggregating Devices Fads Used By The French Fleet Of Purse Seiners In The Atlantic And Indian Oceans written by Alexandra Maufroy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
We analyzed the spatio-temporal dynamics of drifting Fish Aggregating Devices (FADs) used by the French purse seine fleet targeting tropical tunas in the Indian and Atlantic Oceans. First, GPS buoys positions used between January 2007 and December 2010 were separated into two categories: at sea positions and on board positions. Five classification methods (velocity filter, k nearest neighbors, Multiple Logistic Regression, Artificial Neural Network and Random Forest) were developed and compared using an already classified subset of buoys positions (2.3%). On the basis of several performance indicators (e.g. accuracy and precision), the Random Forest model was selected as the best classification method and used for predicting the class of the remaining buoys positions. Basin-scale spatial patterns of fishing sets on FADs, as derived from the FAD trajectories, were consistent with logbook data. A strong seasonality in the use of FADs was shown in the Indian Ocean, the highest FAD densities being observed in March in the Mozambique Channel and in August off the Somali coast. By contrast, the French purse seiners operating in the Atlantic Ocean use less FADs and in a rather constant way over the year. Finally, we evaluated of two time-closure areas, the Picolo zone and the IOTC-Somali area and the Chagos Archipelago Marine Protected Area (MPA). Although preliminary, our findings tend to indicate that the closure of that the closure of the IOTC-Somali zone may not represent an efficient protection of the tropical tuna species targeted with FADs.
Manual On Anchored Fish Aggregating Devices Fads
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Author : William Sokimi
language : en
Publisher:
Release Date : 2020
Manual On Anchored Fish Aggregating Devices Fads written by William Sokimi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Fish aggregation devices categories.