Download or read book An Atlas of Reproductive Development in Rockfishes Genus Sebastes written by Franklin R. Shaw and published by . This book was released on 2012 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The genus Sebastes consists of over 100 fish species, all of which are viviparous and long-lived. Previous studies have presented schemes on the reproductive biology of a single targeted species of the genus Sebastes, but all appear to possess a similar reproductive biology as evidenced by this and other studies. This atlas stages major events during spermatogenesis, oogenesis, and embryogenesis, including atresia, in six species of Sebastes (S. alutus, S. elongatus, S. helvomaculatus, S. polyspinis, S. proriger, and S. zacentrus). Our study suggests that the male reproductive cycle of Sebastes is characterized by 11 phases of testicular development, with 10 stages of sperm development and 1 stage of spermatozoa atresia. Ovarian development was divided into 12 phases, with 10 stages of oocyte development, 1 stage of embryonic development, and 1 stage of oocyte atresia. Embryonic development up to parturition was divided into 33 stages following the research of Yamada and Kusakari (1991). Reproductive development of all six species examined followed the developmental classifications listed above which may apply to all species of Sebastes regardless of the number of broods produced annually. Multiple brooders vary in that not all ova are fertilized and progress to embryos; a proportion of ova are arrested at the pre-vitellogenic stage. Reproductive stage examples shown in this atlas use S. elongatus for spermatic development, S. proriger for oocyte development, and S. alutus for embryological development, because opportunistic sampling only permitted complete analysis of each respective developmental phase for those species. The results of this study and the proposed reproductive phases complement the recommended scheme submitted by Brown-Peterson et al. (2011), who call for a standardization of terminology for describing reproductive development of fishes.

Download or read book Northwest Training Range Complex written by and published by . This book was released on 2010 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic and Morphological Identification of Pelagic Juvenile Rockfish Collected from the Gulf of Alaska written by Arthur W. Kendall (Jr.) and published by . This book was released on 2007 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resource Inventory of Marine and Estuarine Fishes of the West Coast and Alaska written by and published by . This book was released on 2005 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Essential Fish Habitat Designation and Minimization of Adverse Impacts Pacific Coast Groundfish Fishery Management Plan written by and published by . This book was released on 2005 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fisheries of the United States written by and published by . This book was released on 2002 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alaska Groundfish Harvest Specifications written by and published by . This book was released on 2007 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Draft EIS provides decision-makers and the public with an evaluation of the environmental, social, and economic effects of alternative harvest strategies for the federally managed groundfish fisheries in the Gulf of Alaska (GOA) and the Bering Sea and Aleutian Islands (BSAI). The EIS examines alternative harvest strategies that comply with Federal regulations, the Fishery Management Plans for the GOA and BSAI groundfish fisheries, and the Magnuson-Stevens Act. The harvest strategies are applied to the best available scientific information to derive the total allowable catch for the groundfish fisheries.

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1999 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Land based Surveys of Steller Sea Lions Eumetopias Jubatus in Alaska June and July 1999 and 2000 written by John L. Sease and published by . This book was released on 2001 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alaska Marine Mammal Stock Assessments 1999 written by P. Scott Hill and published by . This book was released on 1999 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: "On April 30, 1994, Public Law 103-238 was enacted allowing significant changes to provisions within the Marine Mammal Protection Act (MMPA). Interactions between marine mammals and commercial fisheries are addressed under three new sections. This new regime replaced the interim exemption that has regulated fisheriesrelated incidental takes since 1988. Section 117, Stock Assessments, required the establishment of three regional scientific review groups to advise and report on the status of marine mammal stocks within Alaska waters, along the Pacific Coast (including Hawaii), and the Atlantic Coast (including the Gulf of Mexico). This report provides information on the marine mammal stocks of Alaska under the jurisdiction of the National Marine Fisheries Service"--Preface. [doi:10.7289/V5/TM-AFSC-110 (https://doi.org/10.7289/V5/TM-AFSC-110)]

Download or read book Journal of Experimental Biology written by and published by . This book was released on 1999 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mobile Fishing Gear Effects on Benthic Habitats written by D. A. Wion and published by . This book was released on 2000 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Constructing Species Frequency Distributions written by Charles Winsor Fowler and published by . This book was released on 1999 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Trawling in the Mist written by Alexey Vaisman and published by Traffic International. This book was released on 2001 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the findings of the study on industrial fisheries in the Russian part of the Bering Sea region, with a focus on activities off the Kamchatka peninsula. The study reveals that Kamchatka's fishing sector is in a crisis situation characterised by a sharp drop in production potential, and a deteriorating financial return that encourages the illegal harvesting of marine biological resources. Based on the findings of this study, strategies and recommendations to address unsustainable and illegal harvest and trade in marine resources were developed.

Download or read book written by and published by . This book was released on 2005 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Biochemistry and Physiology written by and published by . This book was released on 2002 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Rockfishes of the Northeast Pacific written by Milton S. Love and published by Univ of California Press. This book was released on 2002 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A major landmark contribution to fisheries science and fish ecology. Rockfish populations are in a severe decline throughout the Northeastern Pacific, and the need for a deep understanding of their biology, ecology, and management has never been more critical. This book addresses all aspects of our current knowledge of this diverse and interesting group of groundfish species, and it is written clearly and with humor. An outstanding work!"--Larry G. Allen, California State University, Northridge "Quite simply the best account ever of the fascinating, diverse, and valuable rockfishes. If you are interested in the marine fishes of the Pacific Coast, you need this book."--Peter B. Moyle, author of Inland Fishes of California