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Full-Text Articles in Aquaculture and Fisheries
Twenty-Five Years Of Change In Spruce Grouse Occupancy At Their Southern Range Margin In Maine, Usa, Christopher J. Gilbert
Twenty-Five Years Of Change In Spruce Grouse Occupancy At Their Southern Range Margin In Maine, Usa, Christopher J. Gilbert
Honors College
Species at their southern range margin are often dispersed throughout fragmented populations where they experience less optimum conditions compared to their central range. Spruce Grouse (Falcipennis canadensis) are boreal forest obligates distributed throughout the Northern United States and Canada and reach their southeastern range extent in Maine. I resurveyed 18 Black Spruce (Picea mariana) – Tamarack (Larix laricina) stands on Mount Desert Island, Maine, to observe changes in Spruce Grouse occupancy and abundance between the early 1990s (Whitcomb et al. 1996) and present day. I conducted two rounds of call back surveys within each …
Diet And Prey Availability Of Sturgeons In The Penobscot River, Maine, Matthew Dzaugis
Diet And Prey Availability Of Sturgeons In The Penobscot River, Maine, Matthew Dzaugis
Honors College
Although vital to the protection and conservation of species listed under the U.S. Endangered Species Act, critical habitat of shortnose sturgeon and Atlantic sturgeon in the Penobscot River, Maine have not yet been described. Critical habitat includes food availability as well as the physical characteristics of foraging habitat. To characterize seasonal availability of benthic prey, a ponar grab was used to collect over 125 benthic samples between 21 May and 8 October 2012. Samples were stratified throughout the river and broadly categorized by sediment type. All organisms within samples were identified to the family level. To characterize diet, stomach contents …