As part of her PhD thesis defense, Wild49 member Jessica Haines will be presenting a one-hour public seminar at 1pm on January 12, 2017, in room CCIS 1-243 at the University of Alberta. Her talk title and abstract are below.
Resources and Reproductive Trade-offs Affect Fitness, Life History Traits, and Sexual Selection in Red Squirrels
Animals face trade-offs throughout life between competing functions, such as between self-maintenance, reproduction, and survival. Resource allocation between these competing functions leads to different patterns of life history traits, changes in investment in reproductive effort, and different patterns of reproductive success. Reproductive investment is also influenced by the environment, for example by resource availability or mating opportunities. In this thesis, I test for evidence of reproductive and life history trade-offs, as well as for whether individual- and population-level resource availability affect reproduction and life history traits. I first tested whether there was evidence of age-related changes in reproductive success in male red squirrels, and in particular whether there was evidence of senescent decline in older ages. I also considered whether there was a trade-off between early-life reproduction and late-life senescence in male red squirrels. Next, I tested whether encountering a resource pulse affected life history traits. I also explored whether life history trade-offs and the fitness consequences of life history traits were affected by encountering a resource pulse called a mast year. Finally, I tested whether individual-level food availability was related with breeding season timing and reproductive success in male and female red squirrels.
Lively looking owl specimens demonstrate to kids a wide variety of species
Special adaptations of their wings, skull, and talons, make owls formidable predators
Several grad students in our lab helped run the owlery again this year at School of Witchcraft and Wizardry, an annual science outreach event run by Let’s Talk Science at the University of Alberta. We taught kids a variety of facts about owls including how they are adapted to their environment, how they hunt, and how they communicate.
The students got to listen to several different species calls recorded from the wild. We had a variety of owl specimens and new this year we brought in mammal specimens (a hare, mouse, vole, and a squirrel), to show the kids what kinds of prey owls will eat. The kids really seemed to enjoy it and so did we! It was great seeing their eyes light up as they learned about owls and listened to different owl calls, there was even one kid that did a great impression of the calls of four different owl species!
Participants listened to audio recordings of owl calls
Photos and text by Julia Shonfield
Last week, Logan McLeod and myself travelled to St. Edmund Elementary/ Junior High School to give a presentation on wetland ecosystems to the grade 5 students. The students learned about wetlands, including the differences between wetland classes and what kinds of flora and fauna can be found in these habitats. We also introduced the students to our work with bioacoustics and had them identify some of the vocalizations of common wetland species. The talk ended in a brief meet and greet with three tiger salamanders, which we had brought along to show the students. The students took in a huge amount of information on wetland ecosystems and left the presentation ready to go explore the local wetlands in our city. One step to conserving our wetlands is understanding their value by experiencing them first hand.
Text by Natasha Annich, photos by Christina Panizzon, grade 5 teacher at St. Edmund Elementary/Junior High school.