Michelle R Shero

Michelle R Shero
Woods Hole Oceanographic Institution | WHOI · Department of Biology

PhD Marine Biology

About

21
Publications
3,831
Reads
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191
Citations
Additional affiliations
January 2013 - present
University of Alaska Anchorage
Position
  • PhD Student
January 2012 - May 2012
University of Alaska Anchorage
Position
  • Research Assistant
Description
  • Introductory Biology Laboratory instructor
January 2012 - May 2012
University of Alaska Anchorage
Position
  • Course Development
Description
  • Developed undergraduate class lectures in Vertebrate Endocrinology

Publications

Publications (21)
Chapter
Full-text available
As the world’s southernmost living mammal, the Antarctic Weddell seal (Leptonychotes weddellii) experiences large shifts in light levels, temperature, ice extent, and prey availability. Understanding the extent that environmental constraints impact the seals’ physiology and behavior has been supported by isolated hole diving experiments and technol...
Article
Full-text available
The relative importance of intrinsic and extrinsic determinants of animal foraging is often difficult to quantify. The most southerly breeding mammal, the Weddell seal, remains in the Antarctic pack-ice year-round. We compared Weddell seals tagged at three geographically and hydrographically distinct locations in East Antarctica (Prydz Bay, Terre A...
Article
Full-text available
We present a novel application using unoccupied aircraft systems (UAS; drones) for structure‐from‐motion three‐dimensional (3‐D) photogrammetry of multiple, free‐living animals simultaneously. Pinnipeds reliably haul‐out on shore for pupping and breeding each year, accompanied by dramatic female‐to‐pup mass transfer over a short lactation period an...
Article
Full-text available
In marine mammals, muscular development has been identified as a rate-limiting factor in achieving adult dive capacities. This study investigates the rate that myosin heavy chain (MHC) composition matures in a postural and locomotor skeletal muscle for four pinniped species with different lactation lengths: hooded seals, Cystophora cristata; harp s...
Article
Full-text available
In capital‐breeding marine mammals, prey acquisition during the foraging trip coinciding with gestation must provide energy to meet the immediate needs of the growing fetus and also a store to meet the subsequent demands of lactation. Weddell seals (Leptonychotes weddellii) that give birth following the gestational (winter) foraging period gain sim...
Article
Circoviridae is a family of circular single-stranded DNA viruses whose members infect a wide variety of hosts. While well characterized in avian and mammalian hosts, little is known about circoviruses associated with Antarctic animals. From 48 Weddell seal (L. weddellii) fecal samples collected on the sea ice in McMurdo between Nov 2014 and Feb 201...
Article
Full-text available
Papillomaviridae is a diverse family of circular, double-stranded DNA (dsDNA) viruses that infect a broad range of mammalian, avian and fish hosts. While papillomaviruses have been characterized most extensively in humans, the study of non-human papillomaviruses has contributed greatly to our understanding of their pathogenicity and evolution. Usin...
Article
Reproductive success is one of the central tenets of conservation management programs, yet the inability to study underlying physiological processes in a minimally-invasive manner and the unpredictable nature of wild animal populations leaves large gaps in our knowledge of factors critical to successful reproduction in wild species. This study inte...
Article
Full-text available
The viruses circulating among Antarctic wildlife remain largely unknown. In an effort to identify viruses associated with Weddell seals (Leptonychotes weddellii) inhabiting the Ross Sea, vaginal and nasal swabs, and faecal samples were collected between November 2014 and February 2015. In addition, a Weddell seal kidney and South Polar skua (Sterco...
Conference Paper
Female Weddell seals (Leptonychotes weddellii) undergo rapid fluctuations in mass and body condition (% lipid) during the summer in association with reproduction and molt, but the physiological regulation of these changes is poorly understood. Recently, we determined that post-partum females rapidly deposit lean mass across summer after they wean t...
Article
Weddell seals (Leptonychotes weddellii) are important predators in the Antarctic marine ecosystem, yet little is known about their diet. Previous studies have used scat and stomach content analyses to examine Weddell seal diet, however, these methods are biased towards prey with indigestible hard parts. To provide a more complete picture of their d...
Conference Paper
Weddell seals (Leptonychotes weddellii) experience a synchronized annual reproductive cycle. Females give birth in the austral spring (October-November) and are bred towards the end of lactation in November and December; following a brief period of embryonic diapause, active gestation begins. To examine endocrine dynamics during the breeding period...
Article
Full-text available
The utility of transrectal ultrasonography was tested in a field setting to characterize the reproductive tract and detect early pregnancy (embryonic vesicles < 3 mm in diameter) in 17 multiparous female Weddell seals (Leptonychotes weddellii). Female Weddell seals give birth in October/November each year, followed by the breeding season (December)...
Article
Full-text available
Adult Weddell seals (Leptonychotes weddellii) haul-out on the ice in October/November (austral spring) for the breeding season and reduce foraging activities for ~4 months until their molt in the austral fall (January/February). After these periods, animals are at their leanest and resume actively foraging for the austral winter. In mammals, decrea...
Article
Full-text available
Reproductive success can be influenced by maternal physiological condition at the time of embryo implantation and by foraging success during gestation. Polar marine mammals experience drastic fluctuations in body composition (lipid stores) as a result of life history events and large-scale changes in seasonal productivity and environmental conditio...
Article
Full-text available
Mass and body composition are indices of overall animal health and energetic balance and are often used as indicators of resource availability in the environment. This study used morphometric models and isotopic dilution techniques, two commonly used methods in the marine mammal field, to assess body composition of Weddell seals (Leptonychotes wedd...
Article
Full-text available
Northern fur seal (Callorhinus ursinus; NFS) populations have been declining, perhaps due to limited foraging ability of pups. Because a marine mammal's proficiency at exploiting underwater prey resources is based on the ability to store large amounts of oxygen (O(2)) and to utilize these reserves efficiently, this study was designed to determine i...
Article
Glutamate is a major signaling molecule that binds to glutamate receptors including the ionotropic glutamate receptors; kainate (KA) receptor (KAR), the N-methyl-d-aspartate receptor, and the alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor. Each is well characterized in the central nervous system, but glutamate has important signa...

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