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Long-Term Retention of Visual Tasks by Two Species of Emydid Turtles, Pseudemys nelsoni and Trachemys scripta
Long-lived species are expected to have long-term memory capabilities. In this study we tested nine Florida Red-bellied Cooters (Pseudemys nelsoni) on their retention for both a procedural food acquisition task and visual discrimination task learned in a previous experiment. The turtles were tested and retrained after two months, after another 7.5 months, and finally after […]
Captive-Reared Burrowing Owls Show Higher Site-Affinity, Survival, and Reproductive Performance When Reintroduced Using a Soft-Release
A remaining challenge for animal reintroductions is how best to aid individuals transitioning from captivity into the wild. We tested two techniques – ‘soft’ vs. ‘hard’ release – in a 7-year study on endangered Western burrowingowls (Athene cunicularia hypugaea) in British Columbia, Canada. Traditionally, captive-reared yearling adults were released into the wild, as pairs, directly […]
Effects of Early Weaning on the Circadian Rhythm and Behavioral Satiety Sequence in Rats
The objective of this work was to study the effect of early weaning on circadian rhythm and the behavioral satiety sequence in adult rats. Male Wistar rat pups were weaned for separation from the mother at 15 (D15), 21 (D21) and 30 (D30) days old. Body weight and food intake was measured every 30 days […]
Lateralised Swimming Behaviour in the California Sea Lion
Lateralised motor behaviour in the pinnipeds has been subject to little investigation. This study examined the swimming behaviour of seven zoo-housed California sea lions to determine whether they exhibited a directional bias in their motor behaviour. Data were collected on the direction of the animals’ swimming patterns from the point of entering a pool of […]
Time series analysis of biologging data: autocorrelation reveals periodicity of diving behaviour in macaroni penguins
The nature of how behaviour at one time step influences the next is of great interest to behavioural ecologists, but rarely used for comparisons between animals. Time depth recorders (TDR) and other archival tags have been widely used to infer patterns of diving and foraging. However, while we can extract variables that describe individual dives, […]
Coloured patches influence pairing rate in King Penguins
Ever since Darwin’s (1871) original description of sexual selection, evolutionary biologists have been intrigued by colourful attributes of animals that appear to be ornamental, without offering direct visible benefits to animals. Nevertheless, the potential biological utility of ornaments was only recently tested, perhaps because traits like the Peacock’s Pavo cristatus tail offer no direct, visible […]
Paternal care in New World Primates
Extensive parental care is well developed in several genera of New World primates (genera Callicebus, Aotus, Callimico, Calltthrix, Cebuella, Leontopithecus, Saguinus) including most of the indirect and direct paternal care behaviors described by Kleiman and Malcolm (1981). Paternal care is correlated with a monogamous (and perhaps polyandrous) mating system and a small group size. Additionally, […]
Ape consciousness-human consciousness- a perspective informed by language and culture
Animal consciousness has long been assumed to be a nonviable arena of investigation. At best, it was thought that any indications of such consciousness, should it exist, would not be interpretable by our species. Recent work in the field of language competencies with bonobos has laid this conception open to serious challenge. This paper reviews […]
A lameness scoring system that uses posture and gait to predict dairy cattle reproductive performance
Lameness has contributed to reproductive inefficiency and increased the risk of culling in dairy cows. We developed a 5-point lameness scoring system that assessed gait and placed a novel emphasis on back posture. Our objective was to determine if this system predicted future reproductive performance and the risk of culling. The study was conducted at […]
Wildlife Responses to Recreation and Associated Visitor Perceptions
Outdoor recreation has the potential to disturb wildlife, resulting in energetic costs, impacts to animals’ behavior and fitness, and avoidance of otherwise suitable habitat. Mountain biking is emerging as a popular form of outdoor recreation, yet virtually nothing is known about whether wildlife responds differently to mountain biking vs. more traditional forms of recreation, such […]