Download or read book How to Age Rockfish Sebastes Using S Alutus as an Example the Otolith Burnt Section Technique written by Canada. Department of Fisheries and Oceans and published by Nanaimo, B.C. : Fisheries and Oceans Canada. This book was released on 1997 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age Determination Manual of the Alaska Fisheries Science Center Age and Growth Program written by Mary Elizabeth Matta and published by . This book was released on 2012 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Age and Growth Program at the Alaska Fisheries Science Center is tasked with providing age data in order to improve the basic understanding of the ecology and fisheries dynamics of Alaskan fish species. The primary focus of the Age and Growth Program is to estimate ages from otoliths and other calcified structures for age-structured modeling of commercially exploited stocks; however, the program has recently expanded its interests to include numerous studies on topics ranging from age estimate validation to the growth and life-history of non-target species. Because so many applications rely upon age data and particularly upon assurances as to their accuracy and precision, the Age and Growth Program has developed this practical guide to document the age determination of key groundfish species from Alaskan waters. The main objective of this manual is to describe techniques specific to the age determination of commercially and ecologically important species studied by the Age and Growth Program. The manual also provides general background information on otolith morphology, dissection, and preparation, as well as descriptions of methods used to measure precision and accuracy of age estimates. This manual is intended not only as a reference for age readers at the AFSC and other laboratories, but also to give insight into the quality of age estimates to scientists who routinely use such data.
Download or read book Fishery Bulletin written by and published by . This book was released on 1971 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rockfishes of the Northeast Pacific written by Milton S. Love and published by Univ of California Press. This book was released on 2002 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A major landmark contribution to fisheries science and fish ecology. Rockfish populations are in a severe decline throughout the Northeastern Pacific, and the need for a deep understanding of their biology, ecology, and management has never been more critical. This book addresses all aspects of our current knowledge of this diverse and interesting group of groundfish species, and it is written clearly and with humor. An outstanding work!"--Larry G. Allen, California State University, Northridge "Quite simply the best account ever of the fascinating, diverse, and valuable rockfishes. If you are interested in the marine fishes of the Pacific Coast, you need this book."--Peter B. Moyle, author of Inland Fishes of California
Download or read book California Cooperative Sardine Research Program written by and published by . This book was released on 2007 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Fish and Game written by and published by . This book was released on 2006 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Cooperative Oceanic Fisheries Investigations Progress Report written by and published by . This book was released on 2007 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age Determination Methods for Fishes Studied by the Groundfish Program at the Pacific Biological Station written by D. E. Chilton and published by Government of Canada, Fisheries and Oceans, Scientific Information and Publications Branch. This book was released on 1982 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual describes methods and equipment used to estimate the ages of groundfish species studied by the Pacific Biological Station. Procedures for routine identification of annuli on scales, otoliths, otolith section, fin-ray sections, and spines are described and illustrated. Although the techniques are applied to species found off Canada's west coast, they should be applicable to other marine and freshwater fishes from temperate and arctic waters. Because some of the procedures are experimental and many have not been validated, it is expected that this manual will be revised several times.
Download or read book Tropical Fish Otoliths Information for Assessment Management and Ecology written by Bridget S. Green and published by Springer Science & Business Media. This book was released on 2009-08-07 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Spatial Processes and Management of Marine Populations written by Gordon H. Kruse and published by Alaska Sea Grant College Program. This book was released on 2001 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings represents worldwide expertise in spatial features of marine population dynamics and spatial applications in fisheries management. Thirty-five peer-reviewed articles feature cutting edge spatial research in analytical tools, modeling, life history patterns, distribution, physical environment, species interactions, fisheries patterns, and marine protected areas. Proceedings of the 17th Wakefield Fisheries Symposium, 1999, Anchorage, Alaska.
Download or read book Marine Freshwater Research written by and published by . This book was released on 2007 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alaska Fishery Research Bulletin written by and published by . This book was released on 2003 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Council Studies written by and published by . This book was released on 2005 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2005 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NOAA Technical Report NMFS written by and published by . This book was released on 1984 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Different Otolith Ageing Techniques on Estimates of Growth and Mortality for Two Species of Rockfishes Sebastes Pinniger and Sebastes Diploproa written by Christopher D. Wilson and published by . This book was released on 1984 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of some age determination methods may result in the incorrect age structure of fish populations. This in turn may lead to incorporation of inappropriate data into models used for stock management. Otoliths are commonly used for determining the age of fishes, and ages based on the whole otoliths (surface ages) are often lower than those based on otolith sections of long-lived, slow-growing fishes such as rockfishes (Sebastes spp.). Therefore, significant overestimates in growth and mortality may occur when surface ages are used for these species. This study provides estimates of growth and total instantaneous mortality for Sebastes diploproa and S. pinniger based on ages determined from the otolith surface versus those determined from otolith sections. For both species, estimates of mortality were reduced by more than half when section rather than surface ages were used. Estimates of growth based on surface rather than section ages were nearly identical for S. diploproa but appeared higher for S. pinniger. The inclusion of posterior otolith projections in the surface counts of S. diploproa and not S. pinniger are suspected of producing these differences. Because of these revised estimates of mortality and growth the life history features and response to exploitation of these species must be re-evaluated. Maximum sustainable yields of S. ninniger and S. diploproa based on surface ages are 2 to 5 times greater for either species than yields based on section ages. Mistaken estimates such as these can lead to management errors resulting in overexploitation and may thus explain the depletion of some stocks of Sebastes spp.
Download or read book National Oceanic and Atmospheric Administration Technical Report National Marine Fisheries Service written by and published by . This book was released on 1984 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
