{"id":{"repo_id":"windsor","oai_identifier":"oai:uwindsor.scholaris.ca:20.500.14776/7074"},"canonical_url":"https://search.dev.ndltd.org/etd/windsor/oai:uwindsor.scholaris.ca:20.500.14776/7074","repository":{"repo_id":"windsor","name":"University of Windsor","base_url":"https://uwindsor.scholaris.ca/server/oai/request"},"display":{"title":"Jacking in Chinook salmon (Oncorhynchus tshawytscha ): environmental and genotypic effects on life history strategy","abstract":"Jacking in Chinook salmon (Oncorhynchus tshawytscha), is defined as precocious sexual maturation of males after at least 1 year in sea water, and occurring 1 year prior to females of the same cohort. Substantial evidence supports genetic, environmental, and genetic by environmental effects on precocious maturation in Chinook salmon, however the underlying mechanisms remain unclear. Passive integrated transponder tagged fish were followed through fresh and salt water growth to the sexual maturation of the jacks. Growth data was recorded to examine the relationship between size/growth effects in freshwater rearing on subsequent precocious sexual maturation of the jacks. No effect of size/growth in freshwater was detected. Reanalysis of data from a previous study showed an effect of developmental rate on jacking. Sequencing tested the possibility of a relationship between jacking and Major Histocompatibility (MH) genes at the MH class II β 1 locus. One genotype positively affected the likelihood of jacking.","abstract_html":"Jacking in Chinook salmon (Oncorhynchus tshawytscha), is defined as precocious sexual maturation of males after at least 1 year in sea water, and occurring 1 year prior to females of the same cohort. Substantial evidence supports genetic, environmental, and genetic by environmental effects on precocious maturation in Chinook salmon, however the underlying mechanisms remain unclear. Passive integrated transponder tagged fish were followed through fresh and salt water growth to the sexual maturation of the jacks. Growth data was recorded to examine the relationship between size/growth effects in freshwater rearing on subsequent precocious sexual maturation of the jacks. No effect of size/growth in freshwater was detected. Reanalysis of data from a previous study showed an effect of developmental rate on jacking. Sequencing tested the possibility of a relationship between jacking and Major Histocompatibility (MH) genes at the MH class II β 1 locus. One genotype positively affected the likelihood of jacking.","abstract_has_math":false,"creators":["Young, William Brent"],"institution":"University of Windsor","degree_name":"M.Sc.","degree_level":"Masters","degree_discipline":"Biological Sciences","degree_department":null,"school":null,"contributors":["seren@uwindsor.ca"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009-01-01","date_published":"2009-01-01","updated_at":"2026-07-27T22:04:39Z","subjects":[],"languages":["en_CA"],"rights":[],"rights_urls":["http://creativecommons.org/licenses/by-nc-nd/4.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14776/7074","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["seren@uwindsor.ca"]},{"key":"dc:creator","label":"Author","values":["Young, William Brent"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-07-03 13:59"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2019-12-18 13:37","2025-07-03T17:59:14Z"]},{"key":"dc:date.issued","label":"Date","values":["2009-01-01"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/masterThesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Biological Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.Sc."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Windsor"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_CA"]},{"key":"dc:rights","label":"Dc Rights","values":["http://creativecommons.org/licenses/by-nc-nd/4.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14776/7074"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Jacking in Chinook salmon (Oncorhynchus tshawytscha), is defined as precocious sexual maturation of males after at least 1 year in sea water, and occurring 1 year prior to females of the same cohort. Substantial evidence supports genetic, environmental, and genetic by environmental effects on precocious maturation in Chinook salmon, however the underlying mechanisms remain unclear. Passive integrated transponder tagged fish were followed through fresh and salt water growth to the sexual maturation of the jacks. Growth data was recorded to examine the relationship between size/growth effects in freshwater rearing on subsequent precocious sexual maturation of the jacks. No effect of size/growth in freshwater was detected. Reanalysis of data from a previous study showed an effect of developmental rate on jacking. Sequencing tested the possibility of a relationship between jacking and Major Histocompatibility (MH) genes at the MH class II β 1 locus. One genotype positively affected the likelihood of jacking."]},{"key":"dc:title","label":"Title","values":["Jacking in Chinook salmon (Oncorhynchus tshawytscha ): environmental and genotypic effects on life history strategy"]}]}],"canonical_facts":{"dc:contributor":["seren@uwindsor.ca"],"dc:creator":["Young, William Brent"],"dc:date.accessioned":["2025-07-03 13:59"],"dc:date.available":["2019-12-18 13:37","2025-07-03T17:59:14Z"],"dc:date.issued":["2009-01-01"],"dc:description.abstract":["Jacking in Chinook salmon (Oncorhynchus tshawytscha), is defined as precocious sexual maturation of males after at least 1 year in sea water, and occurring 1 year prior to females of the same cohort. Substantial evidence supports genetic, environmental, and genetic by environmental effects on precocious maturation in Chinook salmon, however the underlying mechanisms remain unclear. Passive integrated transponder tagged fish were followed through fresh and salt water growth to the sexual maturation of the jacks. Growth data was recorded to examine the relationship between size/growth effects in freshwater rearing on subsequent precocious sexual maturation of the jacks. No effect of size/growth in freshwater was detected. Reanalysis of data from a previous study showed an effect of developmental rate on jacking. Sequencing tested the possibility of a relationship between jacking and Major Histocompatibility (MH) genes at the MH class II β 1 locus. One genotype positively affected the likelihood of jacking."],"dc:identifier.uri":["https://hdl.handle.net/20.500.14776/7074"],"dc:language.iso":["en_CA"],"dc:rights":["http://creativecommons.org/licenses/by-nc-nd/4.0/"],"dc:title":["Jacking in Chinook salmon (Oncorhynchus tshawytscha ): environmental and genotypic effects on life history strategy"],"dc:type":["info:eu-repo/semantics/masterThesis"],"thesis:degree_discipline":["Biological Sciences"],"thesis:degree_level":["Masters"],"thesis:degree_name":["M.Sc."],"thesis:institution_name":["University of Windsor"]},"updated_at":"2026-07-27T22:04:39Z"}