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Full-Text Articles in Life Sciences
Phenotypic Integration Of Behavioural And Physiological Traits Is Related To Variation In Growth Among Stocks Of Chinook Salmon, Mitchel G.E. Dender, Pauline M. Capelle, Oliver P. Love, Daniel D. Heath, Christina A. Semeniuk
Phenotypic Integration Of Behavioural And Physiological Traits Is Related To Variation In Growth Among Stocks Of Chinook Salmon, Mitchel G.E. Dender, Pauline M. Capelle, Oliver P. Love, Daniel D. Heath, Christina A. Semeniuk
Biological Sciences Publications
The selection for a single organismal trait like growth in breeding programs of farmed aquaculture species can counter-intuitively lead to lowered harvestable biomass. We outbred a domesticated aquaculture stock of Chinook salmon (Oncorhynchus tshawytscha) with 7 wild stocks from British Columbia, Canada. We then examined how functionally related traits underlying energy management - diel variation in cortisol; foraging, social, and movement behaviours - predicted stock-level variation in growth during the freshwater life history stage, a performance metric under aquaculture selection. Outbreeding generated significant variation in diel cortisol secretion and behaviours across stocks, and these traits covaried, suggesting tight integration despite …
Phenotypic Integration Of Behavioural And Physiological Traits Is Related To Variation In Growth Among Stocks Of Chinook Salmon, Mitchel G.E. Dender, Pauline M. Capelle, Oliver P. Love, Daniel D. Heath
Phenotypic Integration Of Behavioural And Physiological Traits Is Related To Variation In Growth Among Stocks Of Chinook Salmon, Mitchel G.E. Dender, Pauline M. Capelle, Oliver P. Love, Daniel D. Heath
Biological Sciences Publications
The selection for a single organismal trait like growth in breeding programs of farmed aquaculture species can counter-intuitively lead to lowered harvestable biomass. We outbred a domesticated aquaculture stock of Chinook salmon (Oncorhynchus tshawytscha) with 7 wild stocks from British Columbia, Canada. We then examined how functionally related traits underlying energy management - diel variation in cortisol; foraging, social, and movement behaviours - predicted stock-level variation in growth during the freshwater life history stage, a performance metric under aquaculture selection. Outbreeding generated significant variation in diel cortisol secretion and behaviours across stocks, and these traits covaried, suggesting tight integration despite …
Multigenerational Outbreeding Effects In Chinook Salmon (Oncorhynchus Tshawytscha), Sarah J. Lehnert, Oliver P. Love, Trevor E. Pitcher, Dennis M. Higgs, Daniel D. Heath
Multigenerational Outbreeding Effects In Chinook Salmon (Oncorhynchus Tshawytscha), Sarah J. Lehnert, Oliver P. Love, Trevor E. Pitcher, Dennis M. Higgs, Daniel D. Heath
Integrative Biology Publications
Outbreeding, mating between genetically divergent individuals, may result in negative fitness consequences for offspring via outbreeding depression. Outbreeding effects are of notable concern in salmonid research as outbreeding can have major implications for salmon aquaculture and conservation management. We therefore quantified outbreeding effects in two generations (F1 hybrids and F2 backcrossed hybrids) of Chinook salmon (Oncorhynchus tshawytscha) derived from captively-reared purebred lines that had been selectively bred for differential performance based on disease resistance and growth rate. Parental lines were crossed in 2009 to create purebred and reciprocal hybrid crosses (n = 53 families), and in 2010 parental and hybrid …