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 Periphyton written by M. E. Azim and published by CABI. This book was released on 2005-11-18 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive monograph on periphyton, this book contains contributions by scientists fromaround the globe. Multi-disciplinary in nature, it covers both basic and applied aspects of periphyton,and is applicable worldwide in natural, extensive and intensive managed systems.Periphyton, as described in this book, refers to the entire complex of attached aquatic biota on submergedsubstrates, including associated non-attached organisms and detritus. Thus the periphyton communitycomprises bacteria, fungi, protozoa, algae, zooplankton and other invertebrates. Periphyton is importantfor various reasons: as a major contributor to carbon fixation and nutrient cycling in aquatic ecosystems;as an important source of food in aquatic systems; as an indicator of environmental change. It can alsobe managed to improve water quality in lakes and reservoirs; it can greatly increase aquaculture production;it can be used in waste water treatment.The book provides an international review of periphyton ecology, exploitation and management. Theecology part focuses on periphyton structure and function in natural systems. The exploitation part coversits nutritive qualities and utilization by organisms, particularly in aquaculture. The final part considersthe use of periphyton for increasing aquatic production and its effects on water quality and animal healthin culture systems. This book will help scientists and entrepreneurs further understand the ecology andproduction of aquatic systems and venture into new and promising areas.
Download or read book Marine Metapopulations written by Jacob P. Kritzer and published by Elsevier. This book was released on 2010-07-20 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technological improvements have greatly increased the ability of marine scientists to collect and analyze data over large spatial scales, and the resultant insights attainable from interpreting those data vastly increase understanding of poplation dynamics, evolution and biogeography. Marine Metapopulations provides a synthesis of existing information and understanding, and frames the most important future directions and issues. - First book to systematically apply metapopulation theory directly to marine systems - Contributions from leading international ecologists and fisheries biologists - Perspectives on a broad array of marine organisms and ecosystems, from coastal estuaries to shallow reefs to deep-sea hydrothermal vents - Critical science for improved management of marine resources - Paves the way for future research on large-scale spatial ecology of marine systems
Download or read book Reproductive Biology and Phylogeny of Annelida written by Barrie G M Jamieson and published by CRC Press. This book was released on 2006-01-03 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annelida is a diverse group of animals, commonly referred to as segmented worms and currently comprising around 14000 described species. Found in most marine and freshwater areas, annelids have also successfully occupied many subterranean habitats. This volume documents annelid reproduction in the context of their phylogenetic relationships. It pre
Download or read book Fouling Organisms of the Indian Ocean written by Rachakonda Nagabhushanam and published by CRC Press. This book was released on 2020-08-14 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine fouling organisms attach permanently to ship hulls and underwater parts of offshore structures. All maritime nations spend millions, even billions of dollars to get rid of them. Believing that a pooling of knowledge of all aspects of the basic biology of fouling organisms and a re-examination of control technology methods are steps needed for the solution of this problem, the aim of the book is to highlight recent advances in fouling control technology and, at the same time, provide basic information on the biology of fouling organisms found in the Indian Ocean. The book begins by presenting an overview of research done in India on the marine fouling organisms and wood-borers of the Indian Ocean. It them moves through chapters dealing with the seccession of fouling communities, chemical cues in larval settlement, epibiosis, methods of fouling prevention, functional morphology, and distribution of foulers in Indian waters.
Download or read book Endocrinology and Reproduction written by Milton Fingerman and published by CRC Press. This book was released on 1997-01-12 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: While advances in marine biotechnology will certainly enhance our capabilities in the marine realm, what we learn there will doubtless provide new insight into the biology of freshwater and terrestrial organisms. This volume is a compilation of information that covers a wide range of animal groups. This book will be of interest not only to biotechn
Download or read book Marine Chemical Ecology written by James B. McClintock and published by CRC Press. This book was released on 2001-06-13 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interdisciplinary field of marine chemical ecology is an expanding and dynamic science. It is no surprise that the breadth of marine organisms studied expanded in concert with developments in underwater technology. With its up-to-date subject reviews by experts, Marine Chemical Ecology is the most current, comprehensive book on the subject. The
Download or read book Chemical Ecology written by Melany P. Puglisi and published by CRC Press. This book was released on 2018-08-30 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past 20 years, marine chemical ecology has emerged as a respected field of study providing a better understanding of the role natural products play in organisms and their environments. Ample data in this book advocates the conservation of marine environments for future drug discovery efforts while sustaining their overall health. Marine chemical ecology has expanded to include research in the areas of predator–prey interactions, marine microbial chemical ecology, and seasonal and geographical distribution of marine natural products.
Download or read book Journal of Shellfish Research written by and published by . This book was released on 2008 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Veliger written by and published by . This book was released on 2004 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Alabama Academy of Science written by Alabama Academy of Science and published by . This book was released on 1990 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: List of member in each volume.
Download or read book Stock Enhancement and Sea Ranching written by Kenneth M. Leber and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collapse of many of the World’s fisheries continues to be of major concern and the enhancement of fish stocks through techniques such as ranching is of huge importance and interest across the globe. This important book, which contains fully peer reviewed and carefully edited papers from the 2nd International Symposium in Stock Enhancement and Sea Ranching is broadly divided into sections covering the following areas: The present situation of stock enhancement Seed quality and techniques for effective stocking Health management of hatchery stocks Methods for evaluating stocking effectiveness Population management in stock enhancement and sea ranching Management of stocked populations Ecological interactions with wild stocks Genetic management of hatchery and wild stocks Socio-economics of stock enhancement Case studies Stock Enhancement and Sea Ranching has been written and edited by some of the world’s foremost authorities in fisheries science and related areas and is essential reading for all fisheries scientists throughout the World. Fish biologists, marine and aquatic scientists, environmental biologists, ecologists, conservationists, aquaculture personnel and oceanographers will all find much of use and interest within this book. All libraries within universities and research establishments where these subjects are studied and taught should have copies of this book on their shelves.
Download or read book Fishery Bulletin written by and published by . This book was released on 1989 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chinese Journal of Oceanology and Limnology written by and published by . This book was released on 1995 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Malacological Review written by and published by . This book was released on 2004 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book South African Journal of Marine Science written by and published by . This book was released on 2000 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Freshwater Research written by and published by . This book was released on 2012 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
