Growth Feeding And Movement In The Black Abalone Haliotis Cracherodii Leach 1817
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Growth Feeding And Movement In The Black Abalone Haliotis Cracherodii Leach 1817
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Author : Mary Bergen
language : en
Publisher:
Release Date : 1971
Growth Feeding And Movement In The Black Abalone Haliotis Cracherodii Leach 1817 written by Mary Bergen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Black abalone 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.
Diet And Its Relation To Growth In The Black Abalone Haliotis Cracherodii Leach
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Author : David Leonhardt Leighton
language : en
Publisher:
Release Date : 1959
Diet And Its Relation To Growth In The Black Abalone Haliotis Cracherodii Leach written by David Leonhardt Leighton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Abalones categories.
Bulletin Of The Southern California Academy Of Sciences
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Author : Southern California Academy of Sciences
language : en
Publisher:
Release Date : 1993
Bulletin Of The Southern California Academy Of Sciences written by Southern California Academy of Sciences and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.
Bulletin
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Author :
language : en
Publisher:
Release Date : 1995
Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Science categories.
Sea Grant Publications Index
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Author :
language : en
Publisher:
Release Date : 1968
Sea Grant Publications Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Marine resources categories.
Sea Grant Publications Index 1968 72
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Author :
language : en
Publisher:
Release Date : 1973
Sea Grant Publications Index 1968 72 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Marine biology categories.
The Structure And Function Of The Alimentary Canal Of The Black Abalone Haliotis Cracherodii Leach
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Author : James Luther Campbell
language : en
Publisher:
Release Date : 1951
The Structure And Function Of The Alimentary Canal Of The Black Abalone Haliotis Cracherodii Leach written by James Luther Campbell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1951 with Abalones 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.
Concentration Of Selected Trace Elements In The Black Abalone Haliotis Cracherodii Leach 1814 Collected Between Pillar Point California And Punta Banda Mexico
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Author : David André VenTresca
language : en
Publisher:
Release Date : 1983
Concentration Of Selected Trace Elements In The Black Abalone Haliotis Cracherodii Leach 1814 Collected Between Pillar Point California And Punta Banda Mexico written by David André VenTresca and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Black abalone categories.