diet

Legacy ID: 
1 393
Publication Title: 

Seasonal shifts in the diet of the big brown bat (Eptesicus fuscus), Fort Collins, Colorado

Authors: 
Valdez, E.W. and T.J. O’Shea
Publication Date: 
2014
Parent Publication Title: 
The Southwestern Naturalist
Publication Type: 
Archive number: 
2014/0095 FORT
States: 
Topics: 

Pub Abstract: 

Recent analyses suggest that the big brown bat (Eptesicus fuscus) may be less of a beetle specialist (Coleoptera) in the western United States than previously thought, and that its diet might also vary with temperature. We tested the hypothesis that big brown bats might opportunistically prey on moths by analyzing insect fragments in guano pellets from 30 individual bats (27 females and 3 males) captured while foraging in Fort Collins, Colorado, during May, late July–early August, and late September 2002. We found that bats sampled 17–20 May (n = 12 bats) had a high (81–83%) percentage of volume of lepidopterans in guano, with the remainder (17–19% volume) dipterans and no coleopterans. From 28 May–9 August (n = 17 bats) coleopterans dominated (74–98% volume). On 20 September (n = 1 bat) lepidopterans were 99% of volume in guano. Migratory miller moths (Euxoa auxiliaris) were unusually abundant in Fort Collins in spring and autumn of 2002 and are known agricultural pests as larvae (army cutworms), suggesting that seasonal dietary flexibility in big brown bats has economic benefits.

Publication Title: 

Stable carbon and nitrogen isotope trophic enrichment factors for Steller sea lion vibrissae relative to milk and fish/invertebrate diets

Authors: 
Stricker, C.A., A.M. Christ, M.B. Wunder, A.C. Doll, S.D. Farley, L.D. Rea, D.A.S. Rosen, R.D. Scherer, and D.J. Tollit
Publication Date: 
2015
Parent Publication Title: 
Marine Ecology Progress Series
Publication Type: 
Archive number: 
2015/0014 FORT
States: 

Pub Abstract: 
Publication Title: 

Insect prey eaten by Hoary Bats (Lasiurus cinereus) prior to fatal collisions with wind turbines

Authors: 
Valdez, E.W., and P.M. Cryan
Publication Date: 
2013
Updated Date (text): 
2014-01-13
Parent Publication Title: 
Western North American Naturalist
Publication Type: 
Archive number: 
2013/0083 FORT
States: 
Topics: 

Pub Abstract: 

Wind turbines are being deployed all across the world to meet the growing demand for energy, and in many areas, these turbines are causing the deaths of insectivorous migratory bats. One of the hypothesized causes of bat susceptibility is that bats are attracted to insects on or near the turbines. We examined insect remains in the stomachs and intestines of hoary bats (Lasiurus cinereus) found dead beneath wind turbines in New York and Texas to evaluate the hypothesis that bats die while feeding at turbines. Most of the bats we examined had full stomachs, indicating that they fed in the minutes to hours leading up to their deaths. However, we did not find prey in the mouths or throats of any bats that would indicate the bats died while capturing prey. Hoary bats fed mostly on moths, but we also detected the regular presence of beetles, true bugs, and crickets. Presence of terrestrial insects in stomachs indicates that bats may have gleaned them from the ground or the turbine surfaces, yet aerial capture of winged insect stages cannot be ruled out. Our findings confirm earlier studies that indicate hoary bats feed during migration and eat mostly moths. Future studies on bat behaviors and insect presence at wind turbines could help determine whether feeding at turbines is a major fatality risk for bats.

Publication Title: 

Consumption of bird eggs by invasive Burmese pythons in Florida

Authors: 
Dove, C.J., R.W. Snow, and R.N. Reed
Publication Date: 
2012
Updated Date (text): 
2012-09-10
Parent Publication Title: 
IRCF Reptiles & Amphibians
Publication Type: 
Archive number: 
2012/0088 FORT
States: 

Pub Abstract: 

Burmese Pythons (Python molurus bivittatus or P. bivittatus) have been reported to consume 25 species of adult birds in Everglades National Park, Florida (Dove et al. 2011), but until now no records documented this species eating bird eggs. Here we report three recent cases of bird-egg consumption by Burmese Pythons and discuss egg-eating in basal snakes…

Publication Title: 

Carbon and nitrogen isotope discrimination factors for Steller sea lion vibrissae on milk and fish/squid diets

Authors: 
Stricker, C.A., L.D., Rea, D. Rosen, D.J. Tollit, and S.D. Farley
Publication Date: 
2012
Updated Date (text): 
2012-09-11
Parent Publication Title: 
The 8th International Conference on Applications of Stable Isotope Techniques to Ecological Studies, Brest, France 20-24th, August 2012
Publication Type: 
Archive number: 
2012/0089 FORT

Pub Abstract: 
Publication Title: 

Discrimination factors for 13C and 15N profiles of vibrissae from adult Steller sea lion females and their pups in utero and post parturition

Authors: 
Christ, A.M., L.D. Rea, J.N. Waite, C.A. Stricker, M. Wunder, and R. Scherer
Publication Date: 
2012
Updated Date (text): 
2012-09-11
Parent Publication Title: 
The 8th International Conference on Applications of Stable Isotope Techniques to Ecological Studies, Brest, France 20-24th, August 2012
Publication Type: 
Archive number: 
2012/0090 FORT
States: 

Pub Abstract: 
Publication Title: 

Spatial variation in the diets of female Steller sea lions inferred from 13C and 15N values of vibrissae from pups

Authors: 
Scherer, R.D., L.D. Rea, A.M. Christ, M. Wunder, and C.A. Stricker
Publication Date: 
2012
Updated Date (text): 
2012-09-11
Parent Publication Title: 
The 8th International Conference on Applications of Stable Isotope Techniques to Ecological Studies, Brest, France 20-24th, August 2012
Publication Type: 
Archive number: 
2012/0091 FORT
States: 

Pub Abstract: 
Publication Title: 

Foraging ecology of bottlenose dolphins: a stable isotopic reconstruction over six decades

Authors: 
Rossman, S.L., N.B. Barros, C.A. Stricker, P.H. Ostrom, and R.S. Wells
Publication Date: 
2011
Updated Date (text): 
2012-05-30
Parent Publication Title: 
19th Biennial Conference on the Biology of Marine Mammals, Tampa, Florida, November 27-December 2, 2011
Publication Type: 
Archive number: 
2011/0168 FORT

Pub Abstract: 
Publication Title: 

Delayed age at weaning in Southeast Alaska Steller sea lions determined using stable isotopes of carbon and nitrogen

Authors: 
Rea, L.D., A.R. Banks, S.D. Farley, C.A. Stricker, B. Fadely, J. Mellish, A. Christ, and K. Pitcher
Publication Date: 
2011
Updated Date (text): 
2012-05-30
Parent Publication Title: 
19th Biennial Conference on the Biology of Marine Mammals, Tampa, Florida, November 27-December 2, 2011
Publication Type: 
Archive number: 
2011/0169 FORT

Pub Abstract: 
Publication Title: 

Estimating locations for local extrema of stable isotope signatures in Steller sea lion vibrissae

Authors: 
Christ, A., L. Rea, A. Banks, S. Farley, and C. Stricker
Publication Date: 
2011
Updated Date (text): 
2012-05-30
Parent Publication Title: 
18th Annual Conference of The Wildlife Society - Waikoloa, Hawaii, November 5 -10, 2011
Publication Type: 
Archive number: 
2011/0170 FORT

Pub Abstract: 

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