Black Abalone Mortality
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Black Abalone Mortality
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Author : John Brady Richards
language : en
Publisher:
Release Date : 1992
Black Abalone Mortality written by John Brady Richards and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Abalone fisheries categories.
Black Abalone Mortality
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Author : Carrie S Culver
language : en
Publisher:
Release Date : 1992
Black Abalone Mortality written by Carrie S Culver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Abalones categories.
Geographic Variation And Mass Mortality In The Black Abalone
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Author : Brian Nelson Tissot
language : en
Publisher:
Release Date : 1990
Geographic Variation And Mass Mortality In The Black Abalone written by Brian Nelson Tissot and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Abalones categories.
Studies of geographic variation are central to understanding ecological and evolutionary processes. Geographic variation in the shell of the black abalone (Halioth cracherodii), a marine intertidal gastropod, involves both clinal and local variation along the eastern Pacific coast in the number and size of tremata (=respiratory pores) on the shell. The goals of my studies were to determine the ecological causes of this morphological variation and to evaluate the contribution of developmental processes to morphological patterns. My field studies included 22 surveys conducted over three years (1987-1990), during which I monitored 2715 tagged abalone, at two study sites in California: Afio Nuevo Island and Santa Cruz Island. I depicted the ontogeny of trema number and size using multivariate ontogenetic trajectories: a path describing trema development relative to changes in allometric size. Because variation in the slope of ontogenetic trajectories was associated with latitudinal variation in the habitat of intertidal abalone, I proposed that dissociation between size and trema development by heterochrony was responsible for geographic variation. Spatial and temporal variation in the abundance of drift algal foods had strong effects on the intertidal distribution and feeding preferences of abalone, which are largely sedentary. The availability of drift algae was primarily controlled by the abundance of local algal stocks and the extent of water movement. On Santa Cruz Island, marked fluctuations in the abundance of drift algal foods occurring during the 1986-87 El Nino resulted in mass mortality of abalone in 1986-88. Survivorship during mass mortality had strong interactions with abalone shore-level size gradients and seasonal movement patterns, and was an important factor influencing geographic variation in population structure. Variation in trema number along geographic and wave-exposure gradients was an allometric consequence of variation in shell growth rate, which in turn, was largely controlled by the abundance of drift algal foods. In contrast, shore-level gradients in trema number resulted from a combination of growth-induced allometry, differential survivorship, and complex movement patterns. Trema size varied with the extent of water movement as a response to variation in respiratory efficiency. Overall, morphological patterns resulted from environmentally-induced phenotypic plasticity and not heterochrony.
Estimates Of Growth And Natural Mortality Of The Blacklip Abalone Haliotis Rubra In Tasmania
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Author : David Tarbath
language : en
Publisher:
Release Date : 1999
Estimates Of Growth And Natural Mortality Of The Blacklip Abalone Haliotis Rubra In Tasmania written by David Tarbath and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Abalone culture categories.
Status Review Report For Black Abalone
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Author : John Butler
language : en
Publisher:
Release Date : 2009
Status Review Report For Black Abalone written by John Butler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Black abalone categories.
"Black abalone (Haliotis cracherodii Leach, 1814) was added to the Candidate Species list of the National Marine Fisheries Service (NMFS) on 23 June 1999 (64 FR 33466), transferred to the NMFS Species of Concern list on 15 April 2004 (69 FR 19975), and has since been considered for addition to the List of Endangered and Threatened Species as created by the Endangered Species Act of 1973 as amended (ESA; 16 U.S.C. 1531 et seq.). The species is currently listed on the World Conservation Union (IUCN) Red List of Threatened Species (Smith et al. 2003). NMFS initiated an informal ESA status review of black abalone on 15 July 2003, and conducted biological scoping workshops on 29-30 January 2004 and 31 July-1 August 2006. NMFS formally announced initiation of a black abalone status review on 17 October 2006 (71 FR 61021), and solicited information from the public regarding: life history and current status of the species, historic and current distribution and abundance patterns, potential factors for the species= decline (e.g., overharvesting, natural predation, disease, habitat loss, etc.), and ongoing conservation measures being taken to protect the species"--Introduction.
Environmental Assessment For Issuance Of Permit No 14400 For Takes Of Wild Black Abalone During Black Abalone Monitoring And Research Activities In California
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Author :
language : en
Publisher:
Release Date : 2010
Environmental Assessment For Issuance Of Permit No 14400 For Takes Of Wild Black Abalone During Black Abalone Monitoring And Research Activities In California written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Black abalone categories.
"The National Marine Fisheries Service (NMFS) proposes to issue a scientific research permit for takes of black abalone (Haliotis cracherodii) in the wild, pursuant to the Endangered Species Act of 1973, as amended (ESA; 16 U.S.C. 1531 et seq.). The permit would be valid for five years from the date of issuance and would authorize the take of black abalone in the course of research activities to monitor the population status of the endangered black abalone and to identify population trends through population counts and size distribution measurements. Research would consist of non-lethal take in order to count and measure all individuals at established monitoring sites and to tag a subset of individuals with Passive Integrated Transponder (PIT) tags at selected sites. Dead or obviously dying black abalone would also be collected for pathological and histological studies. The purpose of the proposed research activities are to monitor black abalone abundance and size distribution, estimate survival and growth rates, track the spread of disease, and further understand habitat preferences and changes associated with competition and reduced population size following disease mortality in wild black abalone populations. The information generated by the research activities would be used to inform the management and recovery ofthe species. Work would be conducted by the Multi-Agency Rocky Intertidal Network (MARINe), a consortium of federal, state, and local government agencies, universities, and private firms that are cooperatively conducting monitoring of intertidal resources at over 80 sites in California"--Abstract.
Workshop On Rebuilding Abalone Stocks In British Columbia
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Author : Alan Campbell
language : en
Publisher: NRC Research Press
Release Date : 2000
Workshop On Rebuilding Abalone Stocks In British Columbia written by Alan Campbell and has been published by NRC Research Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Business & Economics categories.
An international Workshop on Rebuilding Abalone Stocks in British Columbia was held during February 23-26 , 1999, in Nanaimo, British Columbia, Canada. The main goal of the workshop was to develop a realistic strategy to rehabilitate depleted northern (pinto) abalone, Haliotis kamtschatkana, stocks in British Columbia. The workshop was also meant to clarify the roles, expectations, and shared interests of many of the interest groups in British Columbia,emphasizing the key role in the rebuilding plan of local communities,including First Nations and non-native communities.
Ecological Characteristics Of Abalone Withering Syndrome In The California Channel Islands
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Author : Joan Leidenthal Ruediger
language : en
Publisher:
Release Date : 1999
Ecological Characteristics Of Abalone Withering Syndrome In The California Channel Islands written by Joan Leidenthal Ruediger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Abalones categories.
Black Abalone Haliotis Cracherodii Five Year Status Review
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Author :
language : en
Publisher:
Release Date : 2018
Black Abalone Haliotis Cracherodii Five Year Status Review written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Black abalone categories.
Abalone Of The World
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Author : S. A. Shepard
language : en
Publisher: Wiley-Blackwell
Release Date : 1992-07-27
Abalone Of The World written by S. A. Shepard and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-07-27 with Technology & Engineering categories.
This comprehensive volume contains some sixty papers and reviews presented at the First International Symposium on Abalone Biology, Fisheries and Culture held in La Paz, Mexico. Introductory reviews in the book focus on the evolutionary origin, radiation and modern relationships of the genus Haliotis. Further papers review aspects of the reproductive process, larval energetics, mechanisms of larval settlement, and the ecology of settlement. Feeding deterrents and attractants, and the relation between food and growth are reviewed in a later section of authoritative papers. The natural mortality of abalone and its causes, predators and diseases are thoroughly reviewed. Several papers summarise information on the withering syndrome afflicting black abalone in California. A series of excellent papers and reviews then consider the problems of managing abalone fisheries. The models used are reviewed and examples given of the application of models to specific fisheries. Further papers provide new information on stock enhancement and the book concludes with case studies of the eight major abalone fisheries of the world with a review of the management of each. The book is divided into eight sections as follows: Part I - Evolution and distributuion. Part II - Physiology, genetics, reproduction. Part III - Larval ecology and settlement. Part IV - Feeding, growth. Part V - Marketing, disease and predators. Part VI - Fishery biology, modelling. Part VII - Case studies of fisheries. Part VIII - Culture.