Supplemental Food and Two Island Populations of Peromyscus leucopus

1986 ◽  
Vol 67 (3) ◽  
pp. 474-480 ◽  
Author(s):  
J. M. Briggs
2015 ◽  
Author(s):  
Stephen E. Harris ◽  
Alexander T. Xue ◽  
Diego Alvarado-Serrano ◽  
Joel T. Boehm ◽  
Tyler Joseph ◽  
...  

ABSTRACTHow urbanization shapes population genomic diversity and evolution of urban wildlife is largely unexplored. We investigated the impact of urbanization on white-footed mice, Peromyscus leucopus, in the New York City metropolitan area using coalescent-based simulations to infer demographic history from the site frequency spectrum. We assigned individuals to evolutionary clusters and then inferred recent divergence times, population size changes, and migration using genome-wide SNPs genotyped in 23 populations sampled along an urban-to-rural gradient. Both prehistoric climatic events and recent urbanization impacted these populations. Our modeling indicates that post-glacial sea level rise led to isolation of mainland and Long Island populations. These models also indicate that several urban parks represent recently-isolated P. leucopus populations, and the estimated divergence times for these populations are consistent with the history of urbanization in New York City.


Heredity ◽  
2013 ◽  
Vol 112 (3) ◽  
pp. 333-342 ◽  
Author(s):  
A J MacDonald ◽  
N N FitzSimmons ◽  
B Chambers ◽  
M B Renfree ◽  
S D Sarre

Oecologia ◽  
2011 ◽  
Vol 168 (3) ◽  
pp. 691-701 ◽  
Author(s):  
Lewis G. Spurgin ◽  
Juan Carlos Illera ◽  
David P. Padilla ◽  
David S. Richardson

The Condor ◽  
2001 ◽  
Vol 103 (1) ◽  
pp. 180-183 ◽  
Author(s):  
Thomas J. Maier ◽  
Richard M. Degraaf

Abstract Small mammals, such as mice and voles, have been implicated as major egg predators of Neotropical migrant passerines by field studies using soft plasticine eggs or the very small eggs of Zebra Finch (Taeniopygia guttata). Nevertheless, the effort required to depredate these commonly used egg surrogates may be less than that required to depredate the larger, thicker-shelled eggs of most passerine species. To compare the depredation of these surrogates to that of the eggs of a mid-sized passerine by a ubiquitous small predator, we exposed dissimilar pairs of plasticine, Zebra Finch, and House Sparrow (Passer domesticus) eggs to captive white-footed mice (Peromyscus leucopus). Plasticine eggs were marked by mice more than either kind of real egg, and Zebra Finch eggs were breached more often than House Sparrow eggs. We conclude that the use of either plasticine or Zebra Finch eggs may lead to overestimation of the ability or proclivity of small mammals to actually depredate the eggs of most passerines.


2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 1379-1379
Author(s):  
Nicholas Bishop ◽  
Sarah Ullevig ◽  
Krystle Zuniga ◽  
Kaipeng Wang

Abstract Objectives The emergence of food insecurity as a primary nutrition-related health issue among older adults suggests a need to examine how nutritional assistance programs are related to food insecurity and dietary quality in aging populations. This project examines food insecurity and dietary quality in US adults age 65 and older and the impact of nutrition assistance programs. Methods The sample was drawn from the 2012 Health and Retirement Study and 2013 Health Care and Nutrition Study and included 3779 respondents representing a population of 37,217,566 adults aged 65 and older. Food insecurity was a binary measure based on the USDA six-item US Adult Food Security Survey Module. Two forms of nutritional assistance included receipt of supplemental food from sources such as food banks and Meals-on-Wheels (1 = yes, 0 = no) and reported receipt of SNAP benefits (1 = yes, 0 = no). Dietary quality was measured using the Alternative Healthy Eating Index-2010 based on a food frequency questionnaire. General linear modeling adjusting for covariates and complex sampling design was used to test if nutritional assistance moderated the association between food insecurity and AHEI-2010. Results Around 10% of the sample was food insecure, 14% reported receipt of supplemental food, and 6.4% were SNAP benefit recipients. In covariate-adjusted models, food insecurity and receipt of SNAP benefits were not associated with AHEI-2010, but receipt of supplemental food was (b = −1.39, SE = 0.67, P = 0.038). Receipt of supplemental food moderated the association between AHEI-2010 and food insecurity (P = 0.001). Simple effect estimates suggested that among those not receiving supplemental food, the food insecure had lower AHEI-2010 scores than the food secure (b = −2.15, SE = 0.88, P = 0.014). Among those receiving supplemental food, the food insecure had greater AHEI-2010 scores than the food secure (b = 2.62, SE = 1.25, P = 0.035) and similar AHEI-2010 scores as the food secure not receiving supplemental food. Conclusions Preliminary analysis suggests that receipt of supplemental food appears to be associated with better dietary quality among food-insecure older adults and confirms the importance of food assistance programs in combating the negative effect of food insecurity on dietary quality. Funding Sources This work is supported by the Texas State University Research Enhancement Program.


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