Agonistic Asymmetries and the Foraging Ecology of Bald Eagles

Ecology ◽  
1988 ◽  
Vol 69 (4) ◽  
pp. 1188-1194 ◽  
Author(s):  
Richard L. Knight ◽  
Susan Knight Skagen
Keyword(s):  
Foraging Ecology ◽  
Bald Eagles

FORAGING ECOLOGY OF BALD EAGLES AT AN URBAN LANDFILL

2006 ◽  
Vol 118 (3) ◽  
pp. 380-390 ◽  
Author(s):  
KYLE H. ELLIOTT ◽  
JASON DUFFE ◽  
SANDI L. LEE ◽  
PIERRE MINEAU ◽  
JOHN E. ELLIOTT
Keyword(s):  
Foraging Ecology ◽  
Bald Eagles

Foraging Ecology of Bald Eagles in the Columbia River Estuary

1991 ◽  
Vol 55 (3) ◽  
pp. 492 ◽  
Author(s):  
James W. Watson ◽  
Monte G. Garrett ◽  
Robert G. Anthony
Keyword(s):  
Foraging Ecology ◽  
River Estuary ◽  
Columbia River ◽  
Columbia River Estuary ◽  
Bald Eagles

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

FORAGING ECOLOGY OF BALD EAGLES IN A FRESHWATER TIDAL SYSTEM

2005 ◽  
Vol 69 (2) ◽  
pp. 609-617 ◽  
Author(s):  
CRAIG M. THOMPSON ◽  
PETER E. NYE ◽  
GREGORY A. SCHMIDT ◽  
DAVID K. GARCELON
Keyword(s):  
Foraging Ecology ◽  
Bald Eagles

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.

Locomotor Economy and Foraging Ecology in Hominins

2021 ◽  
pp. 000-000
Author(s):  
M. Vidal-Cordasco ◽  
J. Rodríguez ◽  
O. Prado-Nóvoa ◽  
G. Zorrilla-Revilla ◽  
A. Mateos
Keyword(s):  
Foraging Ecology
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