Foraging Ecology of the Fringe-Toed Lizard, Uma inornata, during Periods of High and Low Food Abundance

Copeia ◽  
1995 ◽  
Vol 1995 (4) ◽  
pp. 915 ◽  
Author(s):  
Richard D. Durtsche
Keyword(s):  
Foraging Ecology ◽  
Food Abundance ◽  
Uma Inornata

Female Choice in Middendorff's Grasshopper-Warbler (Locustella Ochotensis)

The Auk ◽  
1986 ◽  
Vol 103 (4) ◽  
pp. 694-700 ◽  
Author(s):  
Hisashi Nagata
Keyword(s):  
Mate Choice ◽  
Female Choice ◽  
Morphological Characteristics ◽  
Female Mate Choice ◽  
Food Abundance ◽  
Territory Size ◽  
Territory Quality ◽  
Female Mate ◽  
Nest Sites ◽  
Grasshopper Warbler

Abstract Morphological and territorial factors that influence female mate choice were examined in the monogamous Middendorff's Grasshopper-Warbler (Locustella ochotensis) on an islet near Fukuoka, Japan. I assumed that pairing date corresponded with female mate choice. Pairing date was correlated with both territory size and food abundance but was not correlated with selected morphological characteristics of males. Territorial quality was assumed to be correlated with territory size because preferable food resources and nest sites were distributed randomly. I conclude that female mate choice was influenced by territory quality rather than by the morphological characteristics of males.

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

scholarly journals Olfactory perception of food abundance regulates dietary restriction-mediated longevity via a brain-to-gut signal

Nature Aging ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 255-268
Author(s):  
Bi Zhang ◽  
Heejin Jun ◽  
Jun Wu ◽  
Jianfeng Liu ◽  
X. Z. Shawn Xu
Keyword(s):  
Dietary Restriction ◽  
Food Abundance ◽  
Olfactory Perception

scholarly journals Demographic consequences of foraging ecology explain genetic diversification in Neotropical bird species

2021 ◽  
Author(s):  
Matthew J. Miller ◽  
Eldredge Bermingham ◽  
Benjamin L. Turner ◽  
Justin C. Touchon ◽  
Andrew B. Johnson ◽  
...  
Keyword(s):  
Foraging Ecology ◽  
Bird Species
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