Download or read book Reproductive Biology of Farmed Purple hinged Rock Scallop Crassadoma Gigantea written by Molly Jackson and published by . This book was released on 2021 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Native species are increasingly chosen for aquaculture expansion to avoid negative environmental impacts associated with the introduction of foreign species. However, the culture of native species is not without risks, as interbreeding with wild populations and can impact naturally occurring genetic diversity and population structure. The risk of adverse impacts depends, among other factors, on the frequency of interbreeding and genetic diversity of hatchery produced animals. Thus, cultured stocks that reach sexual maturity prior to harvest and have reduced genetic diversity because of small effective broodstock size, Nb, are particularly risky. Here, we evaluated both factors, first by establishing age and size at maturity and second, by determining the distribution of reproductive success and Nb in a voluntary mass spawn of purple hinged rock scallop, Crassadoma gigantea. Age and size at first maturation were determined by repeat sampling of a known age cohort grown in Dabob Bay WA for 25 months. To establish the effects of local environment on first maturation additional scallops were deployed in Totten Inlet, Dabob Bay, and Neah Bay for ten months and sampled once at the end of growout. Size and age at first maturation was 55.2 mm shell height and 25.1 months of age, well before the projected harvest size and age for cultured C. gigantea. The additive effect of age and size produced the most accurate prediction of first maturation in C. gigantea, and there was a significant effect of environment on first maturation suggesting that under optimal conditions first maturation could be even earlier than our size and age prediction. To determine the distribution of reproductive success in a mass spawn of cultured C. gigantea, scallops were deployed at the three Washington State sites were sequenced using restriction site-associated DNA sequencing to identify SNPs for parentage assignment in COLONY. Three methods were then used to calculate the Nb from sibship assignments (COLONY), parentage assignment without parents (PwoP) and linkage disequilibrium (LDNe). A total of 408 loci were identified for parentage analysis and offspring were assigned to 74.5% of candidate parents at one or more sites. Survival was family specific, as Nb was significantly different across sites and Nb/N ratios were significantly lower than 1.00 at all sites (Totten Inlet=0.33, Dabob Bay=0.26, Neah Bay=0.15). Low Nb/N ratios suggest a loss of genetic diversity in the hatchery which is worsened by mortality on during growout and are an important consideration when determining the risk of genetic diversity loss in wild populations in the event of interbreeding. Unless wild population Ne/N ratios are orders of magnitude lower than their cultured conspecifics than escapes will reduce the genetic diversity of wild populations. Our study determined that interbreeding between cultured and wild C. gigantea is possible, but the magnitude of this risk is reduced by the likely protandry and skewed sex ratio of young C. gigantea. In addition, increasing the number of broodstock used in each spawn, equalizing parental contributions prior to fertilization and using partial or full factorial spawn designs will help increase the Nb of cultured C. gigantea.

Download or read book Spat Settlement Patterns of the Purple hinge Rock Scallop Crassadoma Gigantea in Humboldt County California written by William P. Osborne and published by . This book was released on 1991 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Reproductive Cycle of the Purple Hinged Rock Scallop Hinnites Multirugosus Gale 1928 Mollusca Bivalvia written by Fritz Robert Jacobsen and published by . This book was released on 1977 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Suitability of the Purple hinge Rock Scallop to Marine Aquaculture written by David Leonhardt Leighton and published by . This book was released on 1981 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An International Compendium of Scallop Biology and Culuture written by Sandra E. Shumway and published by . This book was released on 1991 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scallops written by Sandra E. Shumway and published by Elsevier. This book was released on 2016-06-07 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scallops: Biology, Ecology, Aquaculture and Fisheries, Third Edition, continues its history as the definitive resource on scallops, covering all facets of scallop biology, including anatomy, taxonomy, physiology, ecology, larval biology, and neurobiology. More than thirty extensive chapters explore both fisheries and aquaculture for all species of scallops in all countries where they are fished or cultured. This treatise has been updated to include the most recent advances in research and the newest developments within the industry. As aquaculture remains one of the fastest-growing animal food-producing sectors, this reference becomes even more vital. It has all the available information on scallops needed to equip researchers to deal with the unique global issues in the field. Offers 30 detailed chapters on the development and ecology of scallops Provides chapters on various cultures of scallops in China, Japan, Scandinavia, Europe, Eastern North America, and Western North America Includes details of scallop reproduction, nervous system, and behavior, genetics, diseases, parasites, and much more Completely updated edition with valuable information on one of the most widely distributed shellfish in the world

Download or read book The Effect of Temperature and Food on the Growth of the Purple Hinged Rock Scallop Hinnites Multirugosus in Southern California written by Christopher Glen Foe and published by . This book was released on 1978 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Studies on Growth of the Purple hinge Rock Scallop Hinnites Multirugosus Gale in the Marine Waters of Southern California written by James Bryce Monical and published by . This book was released on 1980 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pearl Oyster Health Management written by Melba G. Bondad-Reantaso and published by Food & Agriculture Org.. This book was released on 2007 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides guidance on the management of pearl oyster health and reviews pearl oyster mortalities and disease problems that will be useful for designing programmes aimed at reducing the risks from diseases. Part one consists of pearl oyster health; part two examines pearl oyster health management; part three contains a general review of pearl oyster mortalities and disease problems.

Download or read book Scallops written by Sandra E. Shumway and published by Elsevier Publishing Company. This book was released on 1991 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determining the Economic Feasibility of Rock Scallop Crassadoma Gigantea Culture in Washington State written by E. Michael Kelly and published by . This book was released on 1997 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Biology of Scallop Farming written by David Hardy and published by . This book was released on 1994 with total page 214 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 1993 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Medical and Applied Malacology written by and published by . This book was released on 1990 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book California s Living Marine Resources written by William S. Leet and published by University Of California, Division of Agriculture and Natural Resources; Califorinia Sea Grant. This book was released on 2001 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 592-page spiral-bound reference provides a baseline of information for all those involved with managing living marine resources in California and chronicles changes that have occurred in many of the state’s fisheries. Organized by marine ecosystems: bays and estuaries, nearshore and offshore. Includes illustrated species descriptions with details of biological knowledge, fishery history, landings data, population status and references. Also includes sections on marine birds and mammals and appendices containing management considerations (by species), a glossary of technical terms and acronyms and fishing gear illustrations. Jointly produced by the California Sea Grant Extension Program and the California Department of Fish and Game following the passage of the Marine Life Protection Act in January 1999.

Download or read book Installation and Operation of a Modular Bivalve Hatchery written by Samia Sarkis and published by Food & Agriculture Org.. This book was released on 2007 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication contains guidance on establishing a bivalve hatchery, covering both the technicalities of setting up and operating a hatchery, as well as some basic scientific background issues. Information is given for each stage of rearing: broodstock conditioning, algal culture, hatchery, nursery and growout of juveniles; including the physical requirements and culture considerations and procedures for each rearing stage. The final chapter on economic considerations provides an insight into the labour involved for each stage of production, along with a list of equipment and supplies, which may be used as a template for a new installation. It includes a CD-ROM with the complete text of the complete publication.

Download or read book Memoirs of the Queensland Museum written by and published by . This book was released on 1994 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: