Author: Beatriz Morales-Nin
Publisher: Food & Agriculture Org.
ISBN: 9789251031155
Category : Science
Languages : en
Pages : 64
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Book Description
Fish ageing methods based on growth increments in oroliths are described in detail. A short introduction describes otolith extraction, preparation and viewing techniques, emphasizing the study of microscopic daily growth increments. Light and scanning electron microscope viewing methods and criteria for interpretation are described. The need to test the findings is explained and age validation techniques described.
Author: Beatriz Morales Nin
Publisher: Legare Street Press
ISBN: 9781019414118
Category :
Languages : en
Pages : 0
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Book Description
Fisheries management requires accurate data on fish growth rates, and this book presents the latest techniques for obtaining it. Morales-Nin explains how to use otolith microstructure to determine age and growth patterns of bony fish species, offering detailed examples from a variety of fish types. This book is an invaluable resource for fisheries biologists, as well as anyone interested in the science of fish growth. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Beatriz Morales Nin
Publisher: Nabu Press
ISBN: 9781293513460
Category :
Languages : en
Pages : 62
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Book Description
This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Author: David K. Stevenson
Publisher: McClain Printing Company
ISBN:
Category : Medical
Languages : en
Pages : 422
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Book Description
The field of otolith microstructure research has experienced phenomenal growth since the early 1970s and now forms the basis for hundreds of studies in early life history, age, growth, recruitment, migration, mortality and stock structure. This book represents the first effort to compile and summarize the many techniques and procedures associated with studies of otolith microstructure. The complete sequence of events, from sample collection to data analysis, is covered comprehensively, so as to be applicable to most species and situations. The various chapters include both published and unpublished procedures.
Author: Bridget S. Green
Publisher: Springer Science & Business Media
ISBN: 140205775X
Category : Science
Languages : en
Pages : 313
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Book Description
Techniques and theory for processing otoliths from tropical marine fish have developed only recently due to an historic misconception that these organisms could not be aged. Otoliths are the most commonly used structures from which daily, seasonal or annual records of a fish’s environmental history are inferred, and are also used as indicators of migration patterns, home range, spatial distribution, stock structure and life history events. A large proportion of projects undertaken on tropical marine organisms involve removal and processing of calcified structures such as otoliths, statoliths or vertebrae to retrieve biological, biochemical or genetic information. Current techniques and principles have evolved rapidly and are under constant modification and these differ among laboratories, and more particularly among species and within life history stages. Tropical fish otoliths: Information for assessment, management and ecology is a comprehensive description of the current status of knowledge about otoliths in the tropics. This book has contributions from leading experts in the field, encompassing a tropical perspective on daily and annual ageing in fish and invertebrates, microchemistry, interpreting otolith microstructure and using it to back-calculate life history events, and includes a treatise on the significance of validating periodicity in otoliths.
Author: Danswell Starrs
Publisher:
ISBN:
Category : Evolutionary paleobiology
Languages : en
Pages : 320
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Book Description
Biological and environmental processes that influence the survival and fitness of individuals during their early life history phases can have implications for population structure and function. Historically, tracking early life history phase fishes has been problematic, due to their small size and fragility. Fortuitously, the earstones (otoliths) of bony fishes possess a suite of structural and chemical properties that can be analysed or exploited as a vector for chemical marking, to provide chronologically explicit information on the intrinsic biology and movement history of early life history phase fishes. In this thesis, I explore whether maternal injections of enriched stable barium and strontium isotopes are transmitted from an adult female Eastern rainbowfish Melanotaenia splendida to her offspring's otoliths, to provide a means of mass-marking larvae (transgenerational marking). I found that otoliths from larvae spawned by a female 6 months post-injection are marked. I conclude that transgenerational marking holds great promise for examining natal dispersal of rainbowfish in tropical stream networks. To examine if mixing two enriched stable isotopes can produce a third unique marker and whether transgenerational marking impacts upon larvae growth, survival or morphology, I use the tropical freshwater purple-spotted gudgeon Mogurnda adspersa as a model species. I found that I could produce a third distinguishable batch marker, and that transgenerational marking has no impacts on larvae survival or growth. A meta-analysis combining these results and previously published studies revealed that the impacts of transgenerational marking are non-significant, with the exception of negative growth effects in marine fishes injected with enriched barium isotopes. I conclude that transgenerational marking is rapidly coming of age and awaits wide-scale application. If transgenerational marking can facilitate the fine-scale tracking of individuals through space and time, can otolith microstructure reveal the growth history? I examine if the daily otolith increment widths of larval purple-spotted gudgeon otoliths accurately reflect the growth of larvae reared under variable but controlled environmental conditions. I found that backcalculation of growth using daily otolith increment widths was accurate under all situations except for during periods of food shortage and high temperature. This work suggests that backcalculation of growth using otoliths is a potent source of biological information, but must be applied cautiously. Otolith microstructure and chemistry can reveal the intrinsic biology and habitat use of individuals, respectively, but to what degree have these techniques been applied simultaneously? I performed a systematic review of 476 recent studies (2005-2012) employing otolith-based research to study the early life history ecology of fishes. I found that there is a clear split between studies focussed on biological objectives, which employ otolith microstructure analyses, and those studies exploring spatial objectives, with otolith chemistry analyses. A small number of studies (5%) utilise both the chemical and structural properties of otoliths to explore both biological and spatial objectives simultaneously. I contend that an integrated approach to otolith-based research exploiting both the biological and spatial information within otoliths should be a priority for future studies exploring the early life history mysteries of freshwater fishes.
Author: David H. Secor
Publisher: University of South Carolina Press
ISBN:
Category : Nature
Languages : en
Pages : 778
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Book Description
Author: Hugo Arancibia
Publisher: John Wiley & Sons
ISBN: 1118568354
Category : Technology & Engineering
Languages : en
Pages : 376
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Book Description
The species of hake, making up the genus Merluccius, are commercially important and currently largely over exploited, with many stocks badly depleted and showing only limited signs of recovery. From the end of the 1990s, concepts such as sustainability, ecosystem-based approaches to fisheries management, a code for the responsible conduct for fisheries, governance and others have emerged or have been considered by politicians, stakeholders and society. Moreover, new tools for stock assessment have been developed. But many hake stocks of the genus Merluccius show no sign of restoration. Hakes: Biology and Exploitation brings together a wealth of important information on the biology and exploitation of hake and hoki stocks around the world. Each chapter provides an overview of the fisheries of each species in an ecological and environmental context, looking at stock distribution, characteristics of the environment, life history, reproduction, diet, growth, mortality, pricing and markets of each geographical region and the hake species found there. With chapters written by regional experts on hake species and included within Wiley-Blackwell’s prestigious Fish and Aquatic Resources Series, Hakes: Biology and Exploitation provides up-to-date and comparative information, including new approaches to fisheries management, for all those involved in fisheries management, aquatic ecology and biological sciences.
Author: Gene R. Huntsman
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 238
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Book Description
Proceedings of a workshop on reef fishery management held October 7-10, 1980 at St. Thomas, Virgin Islands of the United States.
Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 628
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Book Description
