Gail D Schwieterman

Gail D Schwieterman
Virginia Institute of Marine Science · Department of Fisheries Science

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12
Publications
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122
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Publications

Publications (12)
Article
Full-text available
Although most animals live in complex, thermally variable environments, the impact of this variability on specific physiological systems is still unresolved. The ectotherm heart is known to change in both structure and function to ensure appropriate oxygen delivery under different thermal regimes, but the plasticity of the upper thermal limits of t...
Article
In teleost fishes, catecholamine-induced increases in the activity of cation exchangers compensate for decreases in hemoglobin oxygen affinity and maximum blood oxygen carrying capacity caused by decreases in plasma pH (i.e., metabolic acidosis). The resultant red blood cell (RBC) swelling has been documented in sandbar (Carcharhinus plumbeus) and...
Article
Full-text available
Elevated plasma potassium levels (hyperkalemia), reduced plasma pH (acidosis), reduced blood oxygen content, and elevated temperatures are associated with species-specific rates of at-vessel and post-release mortality in elasmobranch fishes. The mechanism linking these physiological disturbances to mortality remains undetermined however, and we hyp...
Article
Full-text available
Abstract Ocean warming and acidification act concurrently on marine ectotherms with the potential for detrimental, synergistic effects; yet, effects of these stressors remain understudied in large predatory fishes, including sharks. We tested for behavioural and physiological responses of blacktip reef shark (Carcharhinus melanopterus) neonates to...
Article
Full-text available
Lay summary Elasmobranch blood haematological parameters remained stable over 3 hours of storage duration, indicating that they do not need to be measured immediately. The HemoCue haemoglobin analyser can be used to measure haemoglobin concentrations from elasmobranch blood samples with the use of a correction equation.
Article
Full-text available
Understanding how rising temperatures, ocean acidification, and hypoxia affect the performance of coastal fishes is essential to predicting species-specific responses to climate change. Although a population’s habitat influences physiological performance, little work has explicitly examined the multi-stressor responses of species from habitats diff...
Article
Full-text available
Climate change is causing the warming and deoxygenation of coastal habitats like Chesapeake Bay that serve as important nursery habitats for many marine fish species. As conditions continue to change, it is important to understand how these changes impact individual species' behavioral and metabolic performance. The sandbar shark (Carcharhinus plum...
Article
Full-text available
Dolphinfish (Coryphaena hippurus), large pelagic predators and important fishery targets, frequently associate with floating debris or manmade fish aggregating devices (FADs). We tagged 8 dolphinfish with pressure-sensitive ultrasonic transmitters and actively tracked individuals continuously for up to 40 h to elucidate the vertical movement patter...
Conference Paper
Tanner crabs compose a locally important fishery in the northeast Pacific and Bering Sea, however little is known regarding their optimal growing conditions. In recent years, juvenile crabs of drastically different sizes were recovered from several bays in Kodiac Island, Alaska. This study will determine what portion of the observed variation in gr...