Fish Population Dynamics, Monitoring, and Management

This book explores how we can solve the urgent problem of optimizing the use of variable, uncertain but finite fisheries resources while maintaining sustainability from a marine-ecosystem conservation perspective. It offers readers a broad understanding of the current methods and theory for sustainable exploitation of fisheries resources, and introduces recent findings and technological developments. The book is divided into three parts: Part I discusses fish stock dynamics, and illustrates how ecological processes affecting life cycles and biological interactions in marine environments lead to fish stock variability in space and time in major fish groups; small pelagic fish, demersal fish and large predatory fish. These insights shed light on the mechanisms underlying the variability in fish stocks and form the essential biological basis for fisheries management. Part II addresses the technologies and systems that monitor changes in fisheries resources and marine ecosystems using two approaches: fishery-dependent and fishery-independent data. It also describes acoustic surveys and biological sampling, as well as stock assessment methods. Part III examines management models for effectively assessing the natural variability in fisheries resources. The authors explore ways of determining the allowable catch in response to changes in stock abundance and how to incorporate ecological processes and monitoring procedures into management models. This book offers readers a broad understanding of sustainable exploitation as well as insights into fisheries management for the next generation.

Presents our current understanding of the theories and mechanisms of population dynamics of major fish species with different life cycles Introduces new technologies and concepts for ecosystem monitoring and modeling for fisheries management Provides essential perspectives on sustainable exploitation of naturally fluctuating fisheries resources

Autorentext

Ichiro Aoki
Emeritus Professor
Graduate School of Agricultural and Life Sciences
The University of Tokyo
Tokyo, Japan

Takashi Yamakawa
Graduate School of Agricultural and Life Sciences
The University of Tokyo
Tokyo, Japan

Akinori Takasuka
National Research Institute of Fisheries Science
Japan Fisheries Research and Education Agency
Kanagawa, Japan

Inhalt

1 Introduction.- Part I Dynamics of fish stocks in marine ecosystems.- 2 Part I Description.- 3 Biological mechanisms underlying climate impacts on population dynamics of small pelagic fish.- 4 Population dynamics of demersal fish focusing on walleye pollock (Gadus chalcogrammus) .- 5 Significance of sex-specific ecological and life history traits on the sustainable exploitation of sharks.- Part II Monitoring systems.- 6 Part II Description.- 7 Biological monitoring: fish eggs, fish larvae and zooplankton.- 8 Acoustic survey.- 9 Fisheries stock assessment.- Part III Management models.- 10. Part III Description.- 11 Harvest control rules.- 12 Ecosystem model in data-poor situations.- 13 Perspectives.