Jacking in chinook salmon (Oncorhynchus tshawytscha) is an alternative reproductive strategy in which males sexually mature at least 1 year before other members of their year class. We characterize the genetic component of this reproductive strategy using two approaches; hormonal phenotypic sex manipulation, and a half-sib breeding experiment. We 'masculinized' chinook salmon larvae with testosterone, reared them to first maturation, identified jacks and immature males based on phenotype, and genotyped all fish as male ('XY') or female ('XX') using PCR-based Y-chromosome markers. The XY males had a much higher incidence of jacking than the XX males (30.8% vs 9.9%). There was no difference in body weight, gonad weight, and plasma concentrations of testosterone and 17␤-estradiol between the two jack genotypes, although XY jacks did have a higher

Domestic dogs have been central to life in the North American Arctic for millennia. The ancestors of the Inuit were the first to introduce the widespread usage of dog sledge transportation technology to the Americas, but whether the Inuit adopted local Palaeo-Inuit dogs or introduced a new dog population to the region remains unknown. To test these hypotheses, we generated mitochondrial DNA and geometric morphometric data of skull and dental elements from a total of 922 North American Arctic dogs and wolves spanning over 4500 years. Our analyses revealed that dogs from Inuit sites dating from 2000 BP possess morphological and genetic signatures that distinguish them from earlier Palaeo-Inuit dogs, and identified a novel mitochondrial clade in eastern Siberia and Alaska. The genetic legacy of these Inuit dogs survives today in modern Arctic sledge dogs despite phenotypic differences between archaeological and modern Arctic dogs. Together, our data reveal that Inuit dogs derive from a secondary pre-contact migration of dogs distinct from Palaeo-Inuit dogs, and probably aided the Inuit expansion across the North American Arctic beginning around 1000 BP.

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A pesquisa arqueológica na província mais oriental do Canadá se beneficiou de uma longa e expansível história de parcerias com as comunidades. Tal deve-se, em parte, ao mandato excepcional da Memorial University, assim como ao engajamento forte do departamento de arqueologia em trabalhar com indivíduos e organizações locais durante escavações. A partir de três casos de estudos da província de Terra Nova e Labrador, este artigo revela as motivações, as experiências, os desafios, como os resultados que podem surgir das parcerias comunidade-universidade, e atesta do potencial da arqueologia em contribuir localmente de forma vantajosamente.

Memorial University, located in St. John’s, Newfoundland and Labrador, was created in 1925 to help build a better future for the people of Canada’s easternmost province, whose largely rural fishing communities were rapidly transforming through industrialization and urbanization. Mandated by a “special obligation to the people of the province,” university archaeologists embraced applied, community-based projects which encouraged local solutions to the social and economic issues arising from the transformation to modernity. Today, community archaeology remains integral to our research program and the majority of our research is undertaken in partnership with rural and Indigenous populations who continue to be marginalized both geographically and economically. Two case studies describe how archaeological resources are being used to promote economic and social justice, as well as reconciliation, and how archaeology has the potential to make valuable local contributions that change lives in the present.