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8 results for “Canada jay”
No evidence for future planning in Canada Jays (Perisoreus canadensis)
In the past 20 years, research in animal cognition has challenged the belief that complex cognitive processes are uniquely human. At the forefront of these challenges has been research on mental time travel and future planning in jays. We tested whether Canada Jays (<i>Perisoreus canadensis</i>) demonstrated future planning, using a procedure that had previously produced evidence of future planning in California Scrub-Jays (Aphelocoma californica). Future planning in this procedure is caching in locations where the bird will predictably experience a lack of food in the future. Canada Jays showed no evidence of future planning in this sense and instead placed caches in a location where food was usually available, the opposite of the behaviour described for California Scrub-Jays. We provide potential explanations for these differing results and suggest a re-evaluation of "complex cognition" as an explanation of caching behaviour in jays.
Cache site exploitations by Canada jays (Perisoreus canadensis)
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Data from: Autumn freeze-thaw events carry over to depress late-winter reproductive performance in Canada Jays
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No evidence for future planning in Canada Jays (Perisoreus canadensis)
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Cryptic genetic diversity and cytonuclear discordance characterize contact among Canada jay (Perisoreus canadensis) morphotypes in western North America
<p>Three distinct Canada jay (<em>Perisoreus canadensis</em>) morphotypes with easily recognizable plumage traits come into contact in western North America. Recent work demonstrated high genetic structure across the species' range; however, patterns of genetic variation in these contact zones remain unknown. We categorized 605 individuals into one of three morphotypes (Pacific, Rocky Mountain, and Boreal) based on plumage, and genotyped individuals at the mtDNA control region and 12 microsatellite loci to assess the extent of hybridization between morphotypes. Our data showed cryptic genetic diversity and high cytonuclear discordance among morphotypes within contact zones, which is likely the result of recent and historical admixture. The distributions of the Boreal and Pacific morphotypes each showed a strong association with a single, distinct genetic group, whereas the Rocky Mountain morphotype exhibited higher genetic diversity and was associated with multiple genotypes. Our analyses show the importance of considering both plumage and genetic traits when examining contact zones between closely related taxa. Finally, the data presented in this study reaffirm that the Pacific morphotype is distinct from the Boreal and Rocky Mountain morphotypes based on genetic, phenotypic, and ecological data, indicating that the Pacific morphotype should be re-elevated to a full species.</p>
Data for: Causes and consequences of variation in diet composition of nestling Canada jays
<p>Diet quality during development can impact growth, physiology, behaviour, and survival. The Canada jay is a resident boreal passerine that caches a wide variety of perishable food items in late summer and autumn for its over-winter survival and late-winter reproduction. A previous experiment found evidence that food supplementation of Canada jay pairs during the nestling period had a positive effect on the condition of their nestlings. However, given that foods cached by adults vary widely in nutritional content, the composition of nestling diets could also have an important influence on offspring development. In a population of Canada jays in Algonquin Provincial Park, Ontario, Canada, we investigated the influence of environmental conditions before and during the breeding season on nestling diet composition and the consequences of nestling diet composition on the body condition of nestlings and on their subsequent survival. Using stable-carbon (δ13C) and -nitrogen (δ15N) isotopes, we estimated the proportion of three food groups (vertebrates+human food, invertebrates and plants) in feathers from almost 200 nestlings. Nestling diet in March and April was influenced by environmental conditions 5 – 6 months prior to hatching, with warmer and more variable autumn temperatures associated with a greater proportion of vertebrate flesh and human food in the diet. However, the proportion of vertebrates and human food in the diet had no influence on nestling body condition or whether an individual was observed the following fall. Our results, in conjunction with previous work on Canada jays, suggest that the quantity of food available to a nestling during development may be more important than diet composition.</p> <p> </p>
Cryptic genetic diversity and cytonuclear discordance characterize contact among Canada jay (Perisoreus canadensis) morphotypes in western North America
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Data for: Causes and consequences of variation in diet composition of nestling Canada jays
Open the record for dataset details and reuse information.
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International Brain Laboratory public data
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OpenNeuro
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