Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 31 for “"Ectotherms"”.
-
Constraints on the adaptive potential of ectotherms to climate change
… pathway to survival, the adaptive potential of ectotherms may be inherently limited by evolutionary constraints. In this dissertation, I combine theoretical and empirical approaches to investigate how these constraints may influence the adaptive capacity of ectotherms to climate change across …
-
Consequences of short-term water temperature variability to fish: Current and future climate change impacts
… temperature has a profound influence on aquatic ectotherms by affecting all aspects of biological organization; from chemical and molecular functioning to whole-organism and population-level impacts. Natural processes and anthropogenic activities can create conditions where temperatures vary …
-
The Influence of Environmental Change on Genetic Diversity Across Spatial and Taxonomic Scales
… convey their resilience to environmental change. Ectotherms are especially linked to their environments and may be especially sensitive to fluctuations in the environment over time. Herein, I investigate global and regional patterns of genetic diversity in two groups of ectotherms, insects and …
-
Evolutionary physiology of New Zealand stick insects: A thermal biology approach
… dictating what organisms can and cannot do. Ectotherms, especially those with limited dispersal capacity, are obligated to modify their physiology to cope with short- or long-term temperature changes through phenotypic plasticity or adaptation. Although many single-species studies document …
-
Looking for love on a chilly night: The Colorado brown tarantula mating season
… has implications for other edge populations and ectotherms and establishes a foundation for research on this species.</p>
-
Effects of Temperature on Growth and Molting in Blue Crabs (Callinectes Sapidus) and Lesser Blue Crabs (<i>Callinectes similis</i>)
… can exert impacts on many processes in ectotherms. With global temperatures rising due to climate change, many ectothermic species may exhibit changes in growth rates and size at maturity, and these changes can have population-level effects. Predicting responses of species to climate …
-
EFFECTS OF WINTER AND SUMMER THERMAL VARIABILITY REGIMES ON GROWTH AND METABOLISM IN BROOK TROUT (Salvelinus fontinalis)
… prove challenging for brook trout and other ectotherms that are adapted to small temperature ranges. This research investigates how the growth and metabolic capacities of brook trout respond to long-term exposure to thermal variation. Groups of fish were reared under three thermal regimes: …
-
Effects of Temperature on Foraging, Endurance, and Sprint Speed in Agkistrodon Piscivorus and Nerodia Sipedon
Temperature governs physiological processes in ectotherms, imposing proximate effects on movement functions that may ultimately have important fitness consequences. Studies on the thermal sensitivity of performance in reptiles are useful in understanding how the thermal environment affects …
-
Orientation Preference and Behavioural Thermoregulatory Coordination in Pogona vitticeps.
… rely on ambient temperature as a heat source (ectotherms) make use of multiple voluntary and involuntary behaviours to thermoregulate, including body orientation. The purpose of this work was to examine orientation behaviour in bearded dragons (Pogona vitticeps) as well as possible coordination …
-
Building an In-vitro Cell Model to Study Cellular Basis of Maturation Timing: A Proof of 3D Cell Culture Methodology in Atlantic Salmon Adipose Tissue
… to our knowledge have not been implemented in ectotherms. At an ecological scale, the technique can enhance our understanding by providing insights on cellular and tissue level molecular mechanisms. A potential implementation of this method in Atlantic salmon is to elucidate the molecular …
-
Some like it cold: interactions between the northern frog biting mosquito, Culex territans (Walker 1856), and its amphibian hosts
… in feeding on a wide variety of hosts, including ectotherms such as amphibians and reptiles. Culex territans is a mosquito that feeds primarily on amphibians and reptiles and is known to transmit parasites to its hosts. However, little else is known about this mosquito. This work dives into the …
-
Cold Acclimation Response of Non-native Italian Wall Lizard (Podarcis siculus) Populations from New York and California
… increasingly important task for ecologists. For ectotherms in the northern hemisphere, the response to cold is of special interest, considering that poleward range expansion events and increasing variability of temperatures during winter are already being observed as consequences of a warming …
-
The influence of spatiotemporal variation in ambient temperature on the ecology and physiology of birds
… increases in the thermal tolerance breadth of ectotherms and thermoneutral zone (TNZ –a proxy for thermal tolerance) breadth in endotherms have provided broad empirical support for the CVH. However, most previous tests of the CVH have focused on large-scale patterns of variation in thermal …
-
Physiological and behavioural responses to temperature and humidity in fossorial amphibians
… despite the prediction that fossorial ectotherms should show little thermoregulatory motivation. Lastly, I assessed how extrinsic (temperature and negative geotaxis) and intrinsic (migration restlessness) factors influenced overwintering emergence in A. maculatum. My results suggested …
-
Using thermal imaging data to explore behaviour in a critically endangered frog species, Craugastor ranoides
… changing environments, such as climate change. Ectotherms are particularly vulnerable to the effects of climate warming as they rely on environmental conditions to regulate their body temperature and physiological functions. Thermal imaging can be used as a non-invasive method to study thermal …
-
Population dynamics of the Columbia spotted frog (Rana luteiventris): inference from long-term demography
… population. More generally, amphibians and other ectotherms inhabiting alpine or boreal habitats at or near their thermal ecological limits may benefit from the milder winters provided by a warming climate as long as suitable habitats remain intact.</p> <p>I then used Bayesian models to …
-
Population dynamics of the Columbia spotted frog (Rana luteiventris): inference from long-term demography
… population. More generally, amphibians and other ectotherms inhabiting alpine or boreal habitats at or near their thermal ecological limits may benefit from the milder winters provided by a warming climate as long as suitable habitats remain intact.</p> <p>I then used Bayesian models to …
-
The thermal macrophysiology of core and marginal populations of the aphid Myzus persicae in Europe
Insects are ectotherms and have limited ability to regulate body temperature above or below ambient and are consequently greatly affected by temperature. The aphid \(Myzus\) \(persicae\) has an extensive distribution throughout Europe from Scandinavia to Southern Spain, representing three distinct …
-
Habitat Use and Thermal Ecology of Ratsnakes (Elaphe Obsoleta) and Racers (Coluber Constrictor) in Illinois
Behavioral thermoregulation by ectotherms through selective timing of activity and habitat use involves costs, as well as the benefit of improved physiological function from maintaining optimal body temperatures. Under the cost-benefit model, reptiles should thermoregulate carefully only when the …
-
The Role of Temperature in Habitat Selection by Eastern Massasauga Rattlesnakes (Sistrurus Catenatus Catenatus) Near Their Northern Range Limit
… influencing habitat selection in terrestrial ectotherms, because physiological processes depend on body temperature and body temperatures depend primarily on the habitats they occupy. The importance of temperature in habitat selection should be amplified in cool climates and for ambush …
Page 1 of 2