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Book Atlantic Cod

Download or read book Atlantic Cod written by George A. Rose and published by John Wiley & Sons. This book was released on 2019-02-26 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive handbook, covering all aspects of the Atlantic cod including the biology, ecology, life histories, behaviour, commercial exploitation and conservation Not only is Atlantic cod one of the most valuable food fish in the world’s oceans, it is an important component of North Atlantic ecosystems and has been subject to much research into its biology, ecology and exploitation. After hundreds of years of exploitation, overfishing in the last half of the 20th Century caused many stocks to collapse, most famously the Northern cod stock off Newfoundland and Labrador, Canada. Since then, most cod stocks have been better researched and managed, but remain in a variety of states, from fully recovered to continued decline. This book, written by world experts, describes that research and management, and the importance of cod and its fisheries on North Atlantic cultures and economies, with impacts well beyond the range of the species. Atlantic Cod: Bio-Ecology of the Fish offers insightful chapter coverage of cod nomenclature, taxonomy, phylogeny and morphology; physiology and ecophysiology; reproduction and spawning behavior; early life history and pre-recruitment processes; migrations, movements and stock identity; feeding, growth and energetics; the place of cod in the ecosystem; the exploitation of cod through history and present day commercial fisheries and precautionary management for sustainable fisheries; impacts of climate change on cod biology and ecology; and the future of the species and its fisheries. Discusses the major commercial importance of Atlantic cod through history Provides a comprehensive treatment of the bio-ecology of the most researched and highly exploited fully marine species Examines how the decline (and recovery) of cod stocks is of great political and scientific interest An essential purchase for marine fisheries scientists Atlantic Cod: Bio-Ecology of the Fish is a vital book for all fisheries scientists, managers and fish biologists.

Book An Assessment of the Cod Gadus Morhua Stock in NAFO Subdiv 3Ps in October 2002

Download or read book An Assessment of the Cod Gadus Morhua Stock in NAFO Subdiv 3Ps in October 2002 written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The trends in the 3 yr projection depend heavily on the accuracy of the estimates of the 1997-1999 year classes and their subsequent survival and recruitment to the fishery in 2003-2005. [...] In the current analyses it was assumed that the entire 15,000 t TAC would be taken in the fishing season from 1 April 2002 to 31 March 2003, as outlined in the management plan released by DFO prior to the start of the season. [...] Additionally, part of the offshore branch of the Labrador Current flows around the tail of the Grand Bank, westward along the continental slope (where it may interact with the Gulf Stream and slope waters), to the Laurentian Channel and into the Gulf of St. [...] The other includes the deeper regions of the Laurentian and Hermitage Channels and areas to the west of St. [...] The landings for the 2001 calendar year and the first nine months of 2002 are summarized by month and unit area in Table 3b and for the 2000/2001 management year in Table 3C.

Book Assessment of the Cod Gadus Morhua Stock in NAFO Subdivisions 3Ps in 2009

Download or read book Assessment of the Cod Gadus Morhua Stock in NAFO Subdivisions 3Ps in 2009 written by B. P. Helaey and published by . This book was released on 2011 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An Assessment of the Cod Stock in NAFO Divisions 2J3KL

Download or read book An Assessment of the Cod Stock in NAFO Divisions 2J3KL written by and published by . This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This assessment of the cod stock in area 2J3KL (southern Labrador to northern Grand Banks) begins with a description of the cod fishery, including historical data & its status in 1992, and of environmental conditions relevant to the fishery in 1991. It then provides information on catch & weight at age derived from the commercial catch; summarizes research vessel survey data from trawl surveys & hydroacoustic surveys; analyzes catch rates for potential use as abundance indicators; estimates stock parameters using various indices; and presents stock assessment results with regard to fishing mortality, stock abundance, and recruitment. The final section provides a prognosis for the cod stock.

Book Assessment of the Georges Bank Atlantic Cod Stock for 2005

Download or read book Assessment of the Georges Bank Atlantic Cod Stock for 2005 written by Loretta O'Brien and published by . This book was released on 2006 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an updated analytical assessment of the status of the Georges Bank Atlantic cod Gadus morhua stock (NAFO Division 5Z and Subarea 6) for the period 1978-2004 based on analysis of USA and Canadian commercial landings data and research vessel survey data through 2004. Estimates of 2004 fishing mortality and spawning stock biomass, 2005 beginning year stock size, and the precision of the fishing mortality and spawning stock biomass estimates are presented. Total commercial landings of Georges Bank cod in 2004 were estimated at a record low 4,583 mt, a 42% decrease from the 7,963 mt landed in 2003. The USA fleet landed 76% of the total, and the Canadian fleet landed the remaining 24%. Fishery-independent surveys conducted by the Northeast Fisheries Science Center show similar trends in both biomass and numbers of cod since 1982. The 2004 indices remain below the long term average. Autumn recruitment indices of age 1 cod have been below the time series average since 1989 and among the lowest in the time series. Spawning stock biomass declined from about 93,000 mt in 1980 to a record low of 17,340 mt in 1995, and had increased to 30,000 mt by 2001 primarily due to the growth of the 1996 and 1998 year classes. The 2004 estimate of SSB was 22,564 mt, a decrease of 25% from 2001. Fishing mortality doubled between 1979 and 1985, increased to a record high of 1.5 (72% exploitation rate) in 1994, and has since declined to 0.24 (19% exploitation rate) in 2004. The 2004 year class (10.4 million age 1 fish) was strong, but below the time series average (14.7 million age 1 fish). The 2003 year class (21.2 million age 1 fish), however, is the first above average year class since 1989. This year class, and continued low exploitation with minimal discarding, offer a realistic opportunity for the stock to recover toward the SSBMSY of 217,000 mt.

Book Stock Assessment of Atlantic Cod Gadus Morhua in NAFO Divisions 4X5Y

Download or read book Stock Assessment of Atlantic Cod Gadus Morhua in NAFO Divisions 4X5Y written by Canadian Science Advisory Secretariat and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: