Download or read book Red Abalone Haliotis Rufescens Relative Impacts of Recreational Fisheries and Sea Otter Predation on the Abundance Size Frequency and Microhabitat Distribution of Red Abalone Populations in Central and Northern California written by Samantha Pollard and published by . This book was released on 1992 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology of the Red Abalone Haliotis Rufescens in Northern California written by Robert Thomas Leaf and published by . This book was released on 2005 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Densities and Size Compositions of Red Abalone Haliotis Refuscens at Five Locations on the Mendocino and Sonoma County Coasts September 1986 written by David O. Parker and published by . This book was released on 1988 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Supersaturation and Its Effect on the Red Abalone Haliotis Rufescens Swainson written by Amy Renee Leitman and published by . This book was released on 1989 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Settlement and Postlarval Ecology of the Red Abalone Haliotis Rufescens in Culture Systems written by and published by . This book was released on 1999 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several studies on abiotic and biotic factors that may influence metamorphosis induction and early postlarval survival and growth of the abalone Haliotis rufescens (Mollusca: Gastropoda) in culture systems were conducted. The availability of appropriate cues for metamorphosis induction is crucial. The conventional cue provided in abalone culture (diatom films) is inadequate for this species. This study shows, for the first time, that the gamma-aminobutyric acid (GABA) can be used successfully in massive-scale conditions. Metamorphosis induction by this amino acid was 75-76% (after 24 h) while only 8-12% larvae responded to diatom films. Bacterial interference can be minimized by exposing larvae to GABA in clean tanks and adding diatoms (and associated bacteria), as a postlarval food, after metamorphosis is induced. Alternatively, the conventional GABA concentration (1 micromolar) may be increased within safe limits (up to 2-3 micromolar) to cope with potential degradation of the amino acid by bacteria. Another important factor is the timing of settlement, since a suboptimal induction occurred in precompetent larvae or after a prolonged delayed metamorphosis. However, a maximum response to GABA and increased early postlarval development were observed for larvae settling 1-3 days after the onset of competence. Although GABA is now routinely used to improve settlement in many H. rufescens hatcheries, high mortality or slow postlarval growth are still common. Ecological conditions in the benthic boundary layers above diatom-films of culture systems may play an important role on postlarval fitness. Oxygen microgradients within 1 mm above biofilm surfaces were observed in laboratory studies, with bottom levels higher than 180% or lower than 50% saturation in light and dark conditions, respectively. Reduced postlarval survival and growth can also result from the depletion of biofilms after excessive grazing. Thus, information on grazing rates and the factors controlling them is crucial for the optimal management of culture systems. This contribution provides the first estimates of grazing rates of H. rufescens postlarvae, based on the digital analysis of video-recorded images, ranging from 20 to 724 diatom cells/individual/hour during the first month after settlement.
Download or read book A Combined Telephone and Creel Survey of the Red Abalone Haliotis Rufescens Swainson Sport Fishery in California from Monterey to the Oregon Border April Through November 1989 written by Konstantin A. Karpov and published by . This book was released on 1992 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Decline Without Refuge written by Konstantin A. Karpov and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproduction of Two Populations of the Red Abalone H a l i o t i s R e f e s c e n s Swainson Near Mendocino California written by Albert Giorgi and published by . This book was released on 1974 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Abalone Size Data from Johnsons Lee Santa Rosa Island Collected from 1978 to 1984 written by Peter L. Haaker and published by . This book was released on 1986 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Red Abalone Shell written by Frances Schoonmaker and published by . This book was released on 2018-09-12 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second installment of The Last Crystal Trilogy is even more engaging than the first as grace's son, James, sets out on a journey full of danger, discovery, memory, and maturity.The Red Abalone Shell is one of those books that will keep you up late reading to find out what happens next
Download or read book Biochemical and Histologic Changes in Red Abalone Haliotis Rufescens Subjected to Eight Different Treatment Combinations of Exposure to the Agent of Withering Syndrome Water Temperature and Food Availability written by Beverly Anne Braid and published by . This book was released on 2004 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Combined Telephone and Creel Survey of the Red Abalone Haliotis Rufescens Swainson Sport Fishery in California from Monterey to the Oregon Border April Through November 1988 written by Konstantin A. Karpov and published by . This book was released on 1991 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relative Effects of Diet and Irradiance on the Growth and Survival of Post larval Red Abalone Haliotis Rufescens written by Susan C. McBride and published by . This book was released on 1990 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Queen of the Red Abalone Shell Book and New World Gems written by O. L. Frye and published by . This book was released on 1979 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Behavior and the Central Nervous System of the Red Abalone Haliotis Rufescens written by Linda April Barlow and published by . This book was released on 1991 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iron Levels in Two Populations of Red Abalone H a l i o t i s R u f e s c e n s from Salt Point State Park California written by John Joseph Grant and published by . This book was released on 1979 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Densities and Size Compositions of Red Abalone Haliotis Rufescens at Five Locations on the Mendocino and Sonoma County Coasts September 1986 written by David O. Parker and published by . This book was released on 1988 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
