Winter Foraging Ecology of Moose on Glyphosate-Treated Clearcuts in Maine

1996 ◽  
Vol 60 (4) ◽  
pp. 753 ◽  
Author(s):  
Kevin S. Raymond ◽  
Frederick A. Servello ◽  
Brad Griffith ◽  
William E. Eschholz
Keyword(s):  
Foraging Ecology ◽  
Winter Foraging

scholarly journals Winter foraging ecology of Greater Sage-Grouse in a post-fire landscape

2020 ◽  
Vol 178 ◽  
pp. 104154 ◽  
Author(s):  
Marcella R. Fremgen-Tarantino ◽  
Jacqueline J. Peña ◽  
John W. Connelly ◽  
Jennifer Sorensen Forbey
Keyword(s):  
Foraging Ecology ◽  
Sage Grouse ◽  
Winter Foraging

scholarly journals Stable isotopes document the winter foraging ecology of king penguins and highlight connectivity between subantarctic and Antarctic ecosystems

2018 ◽  
Vol 8 (5) ◽  
pp. 2752-2765 ◽  
Author(s):  
Yves Cherel ◽  
Charline Parenteau ◽  
Paco Bustamante ◽  
Charles-André Bost
Keyword(s):  
Stable Isotopes ◽  
Foraging Ecology ◽  
Winter Foraging

Winter Foraging Ecology of Bald Eagles in Arizona

The Condor ◽  
1993 ◽  
Vol 95 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Bryan T. Brown
Keyword(s):  
Foraging Ecology ◽  
Bald Eagles ◽  
Winter Foraging

Winter Foraging Ecology of Woodland Caribou in Northeastern Washington

1996 ◽  
Vol 60 (4) ◽  
pp. 719 ◽  
Author(s):  
Eric M. Rominger ◽  
Charles T. Robbins ◽  
Marc A. Evans
Keyword(s):  
Foraging Ecology ◽  
Woodland Caribou ◽  
Winter Foraging

Range shift and winter foraging ecology of a population of Arctic tundra caribou

2001 ◽  
Vol 79 (5) ◽  
pp. 746-758 ◽  
Author(s):  
Michael AD Ferguson ◽  
Line Gauthier ◽  
François Messier
Keyword(s):  
Rangifer Tarandus ◽  
Foraging Ecology ◽  
Food Selection ◽  
Arctic Tundra ◽  
High Arctic ◽  
Range Shift ◽  
Winter Range ◽  
Cassiope Tetragona ◽  
Winter Foraging

Some researchers have suggested that over periods of several decades, Arctic tundra caribou (Rangifer tarandus) may be regulated by density-dependent forage depletion. Winter range shifts could potentially delay such regulation when a population is at or near long-term maximum abundance. In the 1980s, Inuit correctly predicted the mass emigration of caribou from a traditional winter range on Foxe Peninsula (FP) on southern Baffin Island, Nunavut, Canada. Most FP caribou subsequently emigrated to a new winter range on Meta Incognita Peninsula (MIP). To determine if MIP provided emigrating caribou with better foraging habitats, we compared winter forage resources and snow cover at caribou foraging sites, and food selection by caribou on FP and MIP in April 1992. Caribou that remained on FP dug feeding craters in shallower, softer snow than those on MIP did. Biomass of most fruticose lichens was greater within foraging sites on MIP than on FP. Biomass of shrubs, other than Cassiope tetragona and Dryas integrifolia, was also greater on MIP than on FP. Dryas integrifolia was the only plant class that had higher biomass on FP than on MIP. Cladina spp. / Cladonia spp., Sphaerophorus fragilis, and Cetraria nivalis occurred less frequently in the rumens of FP caribou. Proportions of fruticose lichens in rumens of caribou on both peninsulas were similar to those on other overgrazed and High Arctic tundra winter ranges. Caribou on FP showed a higher preference for the shrub C. tetragona. Biomasses of plants sensitive to long-term feeding or trampling by caribou (i.e., the five most common fruticose lichens, other shrubs, and plant debris) were consistently lower on FP, which is congruous with Inuit reports that long-term cumulative overgrazing had reduced the supply of important forage plants on FP sites that were accessible to caribou in winter. FP caribou that emigrated to MIP gained access to more abundant, higher quality forage resources than those that remained on FP. Because most FP caribou had emigrated, this South Baffin subpopulation escaped, at least temporarily, the regulating effects of historical cumulative overgrazing.

Historic foraging ecology of the endangered Lahille's bottlenose dolphin (Tursiops truncatus gephyreus) inferred by stable isotopes

2021 ◽  
pp. 107393
Author(s):  
Andrea Campos-Rangel ◽  
Ricardo Bastida ◽  
Pedro Fruet ◽  
Paula Laporta ◽  
Humberto Luis Cappozzo ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Bottlenose Dolphin ◽  
Tursiops Truncatus ◽  
Foraging Ecology

scholarly journals Integrating multiple chemical tracers to elucidate the diet and habitat of Cookiecutter Sharks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aaron B. Carlisle ◽  
Elizabeth Andruszkiewicz Allan ◽  
Sora L. Kim ◽  
Lauren Meyer ◽  
Jesse Port ◽  
...  
Keyword(s):  
Trophic Ecology ◽  
Foraging Ecology ◽  
Isotope Analysis ◽  
Environmental Dna ◽  
Small Sample ◽  
Apex Predators ◽  
Central Pacific ◽  
Chemical Tracers ◽  
Important Prey ◽  
Tracer Techniques

AbstractThe Cookiecutter shark (Isistius brasiliensis) is an ectoparasitic, mesopelagic shark that is known for removing plugs of tissue from larger prey, including teleosts, chondrichthyans, cephalopods, and marine mammals. Although this species is widely distributed throughout the world’s tropical and subtropical oceanic waters, like many deep-water species, it remains very poorly understood due to its mesopelagic distribution. We used a suite of biochemical tracers, including stable isotope analysis (SIA), fatty acid analysis (FAA), and environmental DNA (eDNA), to investigate the trophic ecology of this species in the Central Pacific around Hawaii. We found that large epipelagic prey constituted a relatively minor part of the overall diet. Surprisingly, small micronektonic and forage species (meso- and epipelagic) are the most important prey group for Cookiecutter sharks across the studied size range (17–43 cm total length), with larger mesopelagic species or species that exhibit diel vertical migration also being important prey. These results were consistent across all the tracer techniques employed. Our results indicate that Cookiecutter sharks play a unique role in pelagic food webs, feeding on prey ranging from the largest apex predators to small, low trophic level species, in particular those that overlap with the depth distribution of the sharks throughout the diel cycle. We also found evidence of a potential shift in diet and/or habitat with size and season. Environmental DNA metabarcoding revealed new prey items for Cookiecutter sharks while also demonstrating that eDNA can be used to identify recent prey in stomachs frozen for extended periods. Integrating across chemical tracers is a powerful tool for investigating the ecology of elusive and difficult to study species, such as meso- and bathypelagic chondrichthyans, and can increase the amount of information gained from small sample sizes. Better resolving the foraging ecology of these mesopelagic predators is critical for effective conservation and management of these taxa and ecosystems, which are intrinsically vulnerable to overfishing and exploitation.

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