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

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Published: 2013

Total Pages: 15

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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.

Proceedings of the Regional Pre-COSEWIC Assessment for Shortjaw Cisco (Coregonus Zenithicus) in Canada
Proceedings of the Regional Pre-COSEWIC Assessment for Shortjaw Cisco (Coregonus Zenithicus) in Canada

Author: C. D. Sawatzky

Publisher:

Published: 2013

Total Pages: 20

ISBN-13:

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"A regional science peer-review meeting was held from 30-31 October 2012 in Burlington, Ontario. The objective of this meeting was to peer review existing information held by Fisheries and Oceans Canada (DFO) relevant to the COSEWIC status assessment for Shortjaw Cisco (Coregonus zenithicus) in Canadian waters, particularly with reference to data related to the status and trends of, and threats to, this species inside and outside of Canadian waters, and the strengths and limitations of the information. This information will be available to COSEWIC, the authors of the species' status report, and the co-chairs of the applicable COSEWIC Species Specialist Subcommittee. Meeting participants included experts from DFO, Université Laval, Great Lakes Fishery Commission, and the Ontario Ministry of Natural Resources. This Proceedings report summarizes the relevant discussions from the meeting and presents revisions to be made to the working papers."--Document.

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.