Fish on a measuring board

Rennie Lab

Welcome to the homepage of the Rennie Lab at Lakehead University. Our lab is the Community Ecology and Energetics Lab, where we focus on the rates and pathways of energy in aquatic ecosystems and organisms.

Latest News

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Night on the town with Fish Crew!

We were happy to host our Winnipeg fish crew members a few weeks back at Lakehead! Had some great meetings and a lovely dinner out at the Tomlin. Next year maybe Lauren and I will make the trek to Winnipeg….

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CEELab Classic 2026!

It only took like 9 years but we finally managed to do the CEELab Classic again! Despite what started out to be lovely and sunny weather that quickly turned into a snowstorm, we managed to pull off our second CEELab Classic shinny game! Fun was had by all, and the wind made being on one…

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CEELab writing retreat February 2026

We had a good mix of productive writing focused on individual projects, collaborative work on a lab paper and enough down time to eat some great food, take in some olympics and do some snowshoeing and hiking outside. Big thanks to IISD ELA for hosting us. Look forward to doing this again! Making our way…

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CEELab represents at first annual SES Trivia night!

Big kudos to the CEELab grad students for coming in second place at the inaugural Faculty of Science and Environmental Studies Trivia night! With $100 in Tim’s gift cards, everyone should be well caffeinated for the coming days. Taking both first and second place, Biology dominated! Can’t wait till next year!! Trivia domination. Left to…

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Latest Publications

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92. Drivers of the fish community size spectrum and its utility as an indicator of fish productivity: Insights from three decades of monitoring data from a small boreal lake

Mushet, G.R., MacLeod, H.A., Rennie, M.D., Paterson, M.J., Higgins, S.N., and Blanchfield, P.J. 2025. Drivers of the fish community size spectrum and its utility as an indicator of fish productivity: Insights from three decades of monitoring data from a small boreal lake. Canadian Journal of Fisheries and Aquatic Sciences, 82: 1–14. https://cdnsciencepub.com/doi/10.1139/cjfas-2024-0027  

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91. Declining adult body size and contracted life history in an unexploited boreal Lake Trout (Salvelinus namaycush) population over a period of warming

  Guzzo, M., Blanchfield, P.J., MacLeod, H.A. and Rennie, M.D. 2025. Declining adult body size and contracted life history in an unexploited boreal Lake Trout (Salvelinus namaycush) population over a period of warming. Canadian Journal of Fisheries and Aquatic Sciences, 82: 1–15. http://dx.doi.org/10.1139/cjfas-2024-0393    

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90. Lake depth and light conditions alter Mysis vertical distributions

Chapina, R.J., O’Malley, B.P., Bowen, K., Viljanen, M.L.M., Bess, Z.A., Yule, D.L., Nejstgaard, J.C., Berger, S.A., Rennie, M.D., Paterson, M.J., Pothoven, S.A., Watkins, J., Rudstam, L.G., Chandra, S. and Stockwell, J.D. 2025. Lake depth and light conditions alter Mysis vertical distributions. Journal of Great Lakes Research 51(6): 102684. https://www.sciencedirect.com/science/article/pii/S0380133025001789

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89. Application of a population status model on several recreational lake trout (Salvelinus namaycush) fisheries in Manitoba, Canada

Navarroli, G., Howell, B.E., Klein, A.W.R., Morrissette, O., Rennie, M.D. and Hasler, C.T. 2025. Application of a population status model on several recreational lake trout (Salvelinus namaycush) fisheries in Manitoba, Canada. Published early on-line in Environmental Biology of Fishes, 25 March 2025. https://doi.org/10.1007/s10641-025-01689-5

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