Genetic Differentiation and Origin of the Shortjaw Cisco (Coregonus Zenithicus) in the Great Lakes and Other Inland Canadian Lakes
Genetic Differentiation and Origin of the Shortjaw Cisco (Coregonus Zenithicus) in the Great Lakes and Other Inland Canadian Lakes

Author: Julie Turgeon

Publisher:

Published: 2013

Total Pages: 39

ISBN-13:

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Ciscoes display a phenomenal level of ecophenotypic diversity throughout their North American range, leading to taxonomic uncertainty and complicating conservation efforts. Predictions associated with three hypotheses on the origin of this diversity, and in particular of the Shortjaw distinct phenotype, are evaluated. These hypotheses are the 'Plasticity Hypothesis', the 'Good Species Hypothesis', and the 'Parallel Origin Hypothesis'. Patterns of genetic variation at 290 AFLP loci among 1371 individuals from twenty lakes are analysed, including 387 individual fish identified as (or likely representing) Shortjaw Cisco (Coregonus zenithicus) from 10 lakes. Genetic cluster analyses, association between individual genetic characteristics and phenotypic attributes, genetic re-allocation and analyses of molecular variance were performed.--Document.

Advice on Taxonomic Validity and Designatable Units of Shortjaw Cisco (Coregonus Zenithicus) Populations in Canada
Advice on Taxonomic Validity and Designatable Units of Shortjaw Cisco (Coregonus Zenithicus) Populations in Canada

Author:

Publisher:

Published: 2013

Total Pages: 15

ISBN-13:

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In April 1987, the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) designated Shortjaw Cisco (Coregonus zenithicus) as Threatened. The status was re-examined and confirmed in May 2003. These species must be re-assessed under the new criteria of the Act before they can be added to Schedule 1, and thus receive legal protection, or be removed from the list. Typically, products of a pre-COSEWIC assessment are Canadian Science Advisory Secretariat (CSAS) Research Documents and Proceedings summarizing key points of discussion at the meeting. In the case of Shortjaw Cisco, however, a second objective of the meeting (in addition to the peer review) was to provide Science Advice on the taxonomic validity of Shortjaw Cisco outside of the Laurentian Great Lakes and, if deemed to be valid, the designatable units (DUs) that should be recognized within Canada. These intertwined issues have been the subject of ongoing debate in the scientific literature. The resolution of these issues will aid in the accuracy of the COSEWIC assessment.--Document.

Marine Fishes of Arctic Canada
Marine Fishes of Arctic Canada

Author: Brian W. Coad

Publisher: University of Toronto Press

Published: 2018-01-01

Total Pages: 633

ISBN-13: 1442647108

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Marine Fishes of Arctic Canada is an accessible and up-to-date study on the diverse marine fish population existing in Canadian waters.

A Morphological Examination of Sympatric Cisco Forms in Four Lakes with Specific Reference to the Occurrence of Shortjaw Cisco (Coregonus Zenithicus) in Manitoba
A Morphological Examination of Sympatric Cisco Forms in Four Lakes with Specific Reference to the Occurrence of Shortjaw Cisco (Coregonus Zenithicus) in Manitoba

Author: Lee Murray

Publisher:

Published: 2006

Total Pages: 560

ISBN-13:

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The shortjaw cisco (Coregonus zenithicus) is a widespread species ranging from the Great Lakes region, northwest to Great Slave Lake. Beyond the Great Lakes region, the validity of this species has been questioned due to genetic and morphological variability. Ciscoes were collected from four lakes reported to contain putative C. zenithicus (Lake Athapapuskow, George Lake, and Clearwater Lake, MB; and Reindeer Lake, SK). An examination of gillraker count and arrangement, jaw position, body size, and dorsal colouration was used to initially identify cisco forms within each lake. Multivariate analyses including Principal Component Analysis and Discriminant Analysis incorporating additional meristic and morphometric characters were used to examine within-lake and between-lake variation. Sympatric low and high gillraker forms were found within each lake. The low forms were found to conform to populations of C. zenithicus reported in the literature and the high forms were found to be consistent with descriptions of C. artedi.

NWT Shortjaw Cisco
NWT Shortjaw Cisco

Author: Northwest Territories. Department of Resources, Wildlife and Economic Development

Publisher:

Published: 2001

Total Pages: 4

ISBN-13:

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