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Observers at Hakalau Forest National Wildlife Refuge recorded the use by birds of koa (Acacia koa) and ohia (Metrosideros polymorpha) trees in two sites that were recovering from ungulate disturbance and two reforestation sites where trees had been planted. Observations were made pre- and post-defoliation of koa trees by koa moths (Scotorythra paludicola) during 2013. Focal trees at each site were selected haphazardly and observed for 2 minutes to determine the total number individual birds that visited the tree. Birds were counted when they were already present or as they flew into a tree during the 2-minute period, regardless of whether they departed before the end of the observation period. Birds were identified...
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii Island,
biota,
body mass,
diet,
Bird banding at 2 locations adjacent to one another (one in koa restoration forest, and other in native intact forest) at Hakalau Forest National Wildlife Refuge before and after the start of an outbreak by koa moths (Scotorythra paludicola) during 2013. Each bird was measured with an electronic scale accurate to 1/10th g. Results indicate that insectivorous birds increased in mass, on average, while generalist diet species showed marginally significant increases, and two out of three nectarivorous and frugivorous birds did not have significant change.
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii Island,
biota,
birds,
body mass,
This dataset provides information on fish species composition and their diet information for 16 lakes and 16 ponds at two locations on the central Arctic Coastal Plain, Alaska. In one table, we provide the presence of fish species and the total species count for each lake or pond sampled. This table also includes metrics of surface water connectivity to the stream network. In a second table, stomach content information is provided for fish collected during summer sampling periods (late June to mid-August) over three years (2011–2013). The third table includes stable carbon isotope and stable nitrogen isotope signature data for fish species and snails (the baseline organism) from 16 water bodies at one study location...
These data were compiled to explore the foraging ecology of Rainbow Trout (Oncorhynchus mykiss) in the Colorado River, Grand Canyon, Arizona. These data represent samples characterizing the availability of drifting invertebrate prey (hereafter, drift) and use of these invertebrate prey by rainbow trout determined by gut samples (hereafter, diets). Drift and diet sampling occurred in five distinct reaches downstream of Glen Canyon Dam (river kilometer (rkm) from the dam): (I) rkm 16.3-21.7; (II) rkm 52.8-58.3; (III) rkm 86.6-91.9; (IV) rkm 122.0-123.6; and (V) rkm 127.1-129.6. Samples were taken on 12 trips in April, July, September and January from April 2012 through January 2015. The aquatic prey base consists...
Categories: Data;
Tags: Aquatic Biology,
Arizona,
Bayesian discrete choice model,
Colorado River,
Ecology,
These data provide observations of food items observed held by anterior foot of black abalone (presumably for feeding) at 9 different sites in the rocky intertidal zone around San Nicolas Island, California. Observations were made at low tide while censusing the population on permanently marked transects over a 26 year time period. Also included are some associated abalone size data.
Habitat use, diet, prey availability and foraging ecology of the endangered Hawaiian hoary bat (Lasiurus cinereus semotus, Vespertilionidae), was examined in the east Maui region inclusive of the Waihou Mitigation Area, Pu‘u Makua Restoration Area and the wind power facility operated by Auwahi Wind Energy, LLC. The study was conducted to inform the mitigation and management requirements of Auwahi Wind Energy, research funding was provided by Auwahi Wind Energy, LLC (Auwahi Wind) to fulfill requirements for mitigating bat fatalities under its approved incidental take permit. This study included the first genetic analysis of Hawaiian hoary bat diet items, and broadly confirms the major arthropod orders (Coleoptera,...
Categories: Data;
Tags: Hawaii, USA,
Hawaiian hoary bat,
Insect prey availability,
Waihou, Maui,
diet,
The Eastern Brown Pelican (Pelecanus occidentalis carolinensis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore islands in subtropical and tropical North American waters. It breeds between March and August, laying 2–3 eggs and raising 1–2 chicks per year. The species is facultatively migratory during nonbreeding, with some individuals remaining resident and others leaving breeding areas. Pelicans forage in near- and offshore waters and capture schooling fish by plunge-diving. This dataset summarizes taxonomical information for all prey species identified in the diet of Brown Pelican collected in 2013-2015 at 10 breeding colonies in the northern Gulf of Mexico from...
Categories: Data;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alabama,
Brown pelican,
Diet,
Florida,
Foraging ecology,
The Eastern Brown Pelican (Pelecanus occidentalis carolinensis) is a large-bodied seabird that nests in colonies of 10 to upwards of 5,000 pairs, on nearshore islands in subtropical and tropical North American waters. It breeds between March and August, laying 2–3 eggs and raising 1–2 chicks per year. The species is facultatively migratory during nonbreeding, with some individuals remaining resident and others leaving breeding areas. Pelicans forage in near- and offshore waters and capture schooling fish by plunge-diving. This dataset summarizes diet composition and mass of meals delivered to chicks throughout the chick-rearing period, from hatch (late April) through fledging (early August) in 10 breeding colonies...
Categories: Data;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alabama,
Brown pelican,
Diet,
Florida,
Foraging ecology,
We investigated the summer diets of feral burros (Equus asinus) in two ecosystems in which they are found in the United States: a subtropical desert in Arizona (Lake Pleasant Herd Management Area; HMA) and a temperate juniper shrubland in Utah (Sinbad HMA). In June and July of 2019, we gathered 50 burro fecal samples randomly from each location and used plant DNA metabarcoding to determine the burros’ diets. This dataset includes two.csv files: Burro_diet_AZ_UT_JuneJuly_2019_genera.csv - data showing the diet of burros at Lake Pleasant, AZ and Sinbad, UT HMAs by percent of genera detected. Burro_diet_AZ_UT_JuneJuly_2019_species.csv - data showing the diet of burros at Lake Pleasant, AZ and Sinbad, UT HMAs by percent...
Habitat use, diet, prey availability and foraging ecology of the endangered Hawaiian hoary bat (Lasiurus cinereus semotus, Vespertilionidae), was examined in the east Maui region inclusive of the Waihou Mitigation Area, Pu‘u Makua Restoration Area and the wind power facility operated by Auwahi Wind Energy, LLC. Research funding to study bat ecology was provided by Auwahi Wind, LLC, in order to fulfill requirements for mitigating bat fatalities under its approved incidental take permit. This study included the first genetic analysis of Hawaiian hoary bat guano items, and broadly confirms the major arthropod orders (Coleoptera, Lepidoptera, Diptera, Hemiptera, and Blattodea) found in previous microscopy-based studies...
This tabular data set contains information about the diets of double-crested cormorants (Phalacrocorax auritus) collected from Saginaw Bay, Lake Huron during April-September 2013 and 2014. Diet items were identified, enumerated, and measured.
Categories: Data;
Types: Citation;
Tags: Little Charity Island,
Phalacrocorax auritus,
Saginaw Bay,
Spoils Island, Saginaw Bay, MI,
USGS Science Data Catalog (SDC),
This tabular data set contains information about the diets of angler-caught Lake Trout (Salvelinus namaycush), Walleye (Sander vitreus), Chinook Salmon (Oncorhynchus tshawytscha), Coho Salmon (O. kisutch), Atlantic Salmon (Salmo salar), Steelhead (O. mykiss), Pink Salmon (O. gorbuscha), and Brown Trout (Salmo trutta) captured between April and October of 2017 and 2018 from U.S. waters of Lake Huron. Diet items were identified to lowest taxa, enumerated, measured, and prey biomass determined.
The role of disease in freshwater mussel declines has been largely ignored due to the lack of appropriate diagnostic tools and metabolomic markers of stress. Mussels in this study were either fed a prepared diet or unfed and their condition was assessed with the observed changes in fatty acid content of their tissue. This dataset contains quantitative fatty acid data from nonlethal (biopsy) sampling of foot tissue. These data may provide biomarkers indicative of freshwater mussel’s metabolic status.
Arthropods are important prey for most forest birds in Hawaii. The relative abundance of arthropods on koa (Acacia koa) changed significantly during an outbreak of the koa moth (Scotorythra paludicola) that occurred across much of Hawaii Island during 2013-2014. The outbreak resulted in large tracts of koa forest becoming defoliated by large numbers of koa moth caterpillars. This data release includes metadata and tabular data that documents how bird diets changed at Hakalau Forest National Wildlife Refuge during the outbreak. The data set documents numbers of koa moth caterpillars and other arthropod prey consumed by forest birds prior to, and during the koa moth outbreak. Diets were reconstructed by identifying...
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii Island,
biota,
birds,
caterpillar,
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