Applied Gerontology and Minority Aging: A Millennial Goal

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68297/2/10.1177_073346489801700203.pd

Drone-based photogrammetry reveals differences in humpback whale body condition and mass across North Atlantic foraging grounds

Baleen whales are key consumers in marine ecosystems and can serve as ecosystem sentinels. Body condition, defined as an individual’s energy stores relative to its structural size, can provide a useful proxy for health in baleen whales. As capital breeders, important life history events in baleen whales such as seasonal migrations and reproduction depend on having sufficient energy stores. Spatiotemporal variability of body condition of baleen whales can reflect differences in energy accumulated during the foraging season. Here we assess and compare the body condition and mass of humpback whales (Megaptera novaeangliae) across four different foraging areas from the West Indies distinct population segment in the Northwest Atlantic. Morphometric measurements of humpback whales were obtained using unoccupied aerial systems (UAS, or drones) from the New York Bight, the Gulf of Maine, Iceland, and Greenland. Uncertainty in morphometric estimates was incorporated and propagated using a bootstrapping approach. Measurements were used to estimate body volume and calculate a body condition index (BCI) for each individual whale. Since body mass is a key parameter for understanding animal physiology and bioenergetics, we further compared whale body mass to body size between foraging areas by converting body volume to body mass using estimates of tissue density from tagging studies. BCI showed significant differences between foraging areas with a large effect size (ANCOVA: mean η2 = 0.168; all p< 0.001) when incorporating day of year and year as covariates. Humpback whales in the Gulf of Maine showed significantly higher BCI than those in the New York Bight, Iceland, and Greenland. Standardized Major Axis (SMA) regressions comparing log-log relationships of both body volume and body mass, respectively, to total length reinforced these results. Humpback whales in the Gulf of Maine showed significantly higher elevation in the SMAs than those in the other study regions (p<0.001), implying that humpback whales foraging in the Gulf of Maine accumulated greater energy reserves for a given body size. Estimates of body mass indicate that for a given body length, humpback whales in the Gulf of Maine have an 18% greater body mass than those in the New York Bight, Iceland, or Greenland. Regional differences in prey availability or anthropogenic threats could contribute to the observed patterns in body condition. Our findings highlight the importance of regional environmental factors to the nutritional health of baleen whales

Ethnicity in the Informal Networks of Older Sunbelt Migrants

Ethnicity in the Informal Networks of Older Sunbelt Migrant

How Do Female and Male Faculty Members Construct Job Satisfaction? The Roles of Perceived Institutional Leadership and Mentoring and their Mediating Processes

In this study we examine how a sample of 248 male and female professors at a Midwestern private research university construct their academic job satisfaction. Our findings indicate that both women and men perceive that their job satisfaction is influenced by the institutional leadership and mentoring they receive, but only as mediated by the two key academic processes of access to internal academic resources (including research-supportive workloads) and internal relational supports from a collegial and inclusive immediate work environment. Gender differences emerged in the strengths of the perceived paths leading to satisfaction: women’s job satisfaction derived more from their perceptions of the internal relational supports than the academic resources they received, whereas men’s job satisfaction resulted equally from their perceptions of internal academic resources and internal relational supports received. Implications for leadership and institutional practices are drawn from the findings. Copyright Springer Science + Business Media, Inc. 2006academic job satisfaction, women faculty, academic climate, J220, C420, D020, J000, I230,

Strategies Resident-Physicians Use to Manage Sleep Loss and Fatigue

Abstract: Our purpose is to examine strategies or countermeasures resident-physicians used in dealing with the effects of sleep loss and fatigue during residency training. A total of 149 residents across five sites and six specialty areas were recruited for the study. Focus groups consisted of an average of 7 individuals in the same year of training and residency program, and included 60 interns and 89 senior residents. Trained moderators conducted focus groups using a semi-structured discussion guide. Transcripts were analyzed using the grounded theory tradition. The range of strategies adopted was: Chemical, Dietary, Sleep Management, Behavioral, and Cognitive. Residents exhibited a trial-and-error approach to identifying management strategies. None mentioned searching the scientific literature or consulting local sleep medicine experts. Residents relied on putative countermeasures even when they were aware of their negative effects. Our results document the need to educate resident physicians on self-care strategies during residency training. Research on maintaining healthy lifestyles has documented a divergence between people’s understandin