Download or read book Genetic and Morphometric Analyses of Atlantic Herring Clupea Harengus L Stocks to the West of the British Isles with Particular Reference to the North Sea written by D. P. F. King and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic and Morphometric Analyses of Atlantic Herring Clupea Harengus L Stocks to the West of the British Isles with Particular Reference to the North Irish Sea written by David Patrick Francis King and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estuaries and Coastal Waters of the British Isles written by and published by . This book was released on 1984 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Record of Agricultural Research written by Great Britain. Department of Agriculture for Northern Ireland and published by . This book was released on 1982 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book British Reports Translations and Theses written by British Library. Lending Division and published by . This book was released on 1984 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issue for Mar. 1981 contains index for Jan.-Mar. 1981 in microfiche form.
Download or read book Annual Report on Research and Technical Work of the Department of Agriculture for Northern Ireland written by Great Britain. Department of Agriculture for Northern Ireland and published by . This book was released on 1982 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Zoological Record written by and published by . This book was released on 1984 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Herring in Divisions 6 a 7 b and 7 c written by and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was to assess the identity of herring stocks in ICES Divisions 6.a, 7.b and 7.c, through genetic analysis, in order to develop genetic profiles of the northern (ICES Division 6.a North) and southern (ICES Divisions 6.a South, 7.b and 7.c) stocks, which could be used to discriminate the two stocks during times of mixing, such as, in the summer acoustic surveys. In addition, body and otolith morphometric methods were developed to test if morphometric methods were also able to discriminate the stocks in these areas. The study comprised an extensive review of the history of the existing stock delineations, comprehensive sampling for both the genetic and morphometric components of the project, genetic marker development, genetic screening of samples, the establishment of a genetic protocol for large scale sample screening, morphometric analyses and comparative analyses of both methods. Baseline spawning samples were collected over five spawning seasons (2014-2019) and archive samples from the WESTHER project (2003-2004) were also reanalysed. In total c.4,900 individuals from Divisions 6.a, 7.b and 7.c, 1,860 individuals from outgroup populations, 650 individuals from the WESTHER samples and 3,665 individuals from the MSHAS samples were analysed as part of the genetic analysis tasks. A total of 1,815 baseline spawning individuals from Division 6.a were analysed for the morphometric component of the project and data from more than 10,000 individuals from the MSHAS samples were collected. The genetic analyses indicated that herring in ICES Division 6.a comprise at least three distinct populations; 6.a.S herring, 6.a.N autumn spawning herring and 6.a.N spring spawning herring. The 6.a.S herring are primarily a winter spawning population though there is a later spawning component present in the area also. These components are currently inseparable and for the purposes of stock assessment should be combined as 6.a.S herring. No baseline spawning samples could be collected in Divisions 7.b or 7.c therefore the relationship between the herring that spawn in this area and those that spawn in 6.a.S is unknown. Non-spawning herring caught in Division 7.b assigned genetically to the 6.a.S population. There is no historical or contemporary evidence to support the differentiation of 6.a.N autumn spawning herring and North Sea autumn spawning herring. The term 'west of Scotland herring' originally referred to populations of spring spawning herring that spawned in the Minch area. It now refers to autumn spawning herring that occur west of the 4°W boundary during the period of the MSHAS. The Celtic Sea herring and Irish Sea herring are distinct from each other and from the populations in ICES Divisions 6.a however the current genetic marker panel is not optimised for their inclusion in the baseline assignment dataset. This is not considered to be a significant issue as there is no robust evidence that Irish Sea herring are found in large abundance west of the Hebrides during summer. Historical evidence does suggest that they may be found in the Clyde area at this time before returning to spawn in the Irish Sea in autumn. The morphometric methods used in the current study indicated significant differences between the 6.a.S herring and the 6.a.N autumn spawning herring, however they did not show sufficient power to discriminate mixed survey catches in ICES Division 6.a. The genetic markers and assignment methods presented in the current study constitute a tool that can be used for the assignment of herring caught in mixed survey and commercial catches in Division 6.a into their population of origin with a high level of accuracy (>90%). This approach should be used for regular monitoring of MSHAS and commercial catches of herring in this area and further efforts should be made to expand the genetic screening to the North Sea also.
Download or read book The BRITS Index Subject index written by British Theses Service and published by . This book was released on 1989 with total page 1156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stock Specific Growth Patterns of Atlantic Herring Clupea Harengus Surrounding the British Isles written by Stuart Barker and published by . This book was released on 2011 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The BRITS Index Title index written by British Theses Service and published by . This book was released on 1989 with total page 1158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Host Bibliographic Record for Boundwith Item Barcode 30112033097202 and Others written by and published by . This book was released on 2013 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Separation of Atlantic Herring Clupea Harengus Stocks in the Southern Gulf of St Lawrence Using Digitized Otolith Morphometrics and Discriminant Function Analysis written by S. N. Messieh and published by Dartmouth, N.S. : Fisheries and Oceans, Canada. This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The identification of Atlantic herring stocks inhabiting both sides of the northern Atlantic has been the subject of numerous investigations for many years. In more recent years, the discreteness of the spring and autumn herring populations in the Gulf of St. Lawrence was established, a separation important for delineating proper fishery management units. Otolith characteristics, such as shape and first year's growth, were used in both the Gulf and Newfoundland regions, but the method used requires well-trained technicians and was criticized because of its subjectivity. A semi-automated microcomputer-based measuring system was developed for otolith measurements in the Gulf region to eliminate such subjectivity. The method uses a microscope with a drawing tube and a digitizer interfaced to a personal computer which analyzes the digitized otolith measurements using software packages. This report presents results using this system to separate herring spawning groups by otolith morphometrics.
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1991 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morphometric Discrimination of Atlantic Herring Clupea Harengus in the Northwestern Atlantic Ocean written by Karen L. Bolles and published by . This book was released on 2006 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Analysis of Genetic Diversity in Atlantic Herring Clupea Harengus L Off the Irish Coast Using Microsatellite DNA Markers written by Linda Elizabeth Sullivan and published by . This book was released on 2006 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
