Body temperature is a more pertinent variable to physiological stress than ambient air temperature. Modeling and empirical studies on the impacts of climate change on ectotherms usually assume that body temperature within organisms is uniform. However, many ectotherms show significant within-body temperature heterogeneity. The relationship between regional heterothermy and the response of ectot...

The reproductive and developmental biology of Gonatocerus triguttatus Girault, a parasitoid of the glassy-winged sharpshooter, Homalodisca vitripennis (Germar), was determined at five constant temperatures in the laboratory; 15, 20, 25, 30, and 33 C. At 25 C, G. triguttatus maintained the highest successful parasitism rates with 25.1% of oviposition leading to emerging parasitoid larvae and low...

BACKGROUND Regular aspirin use probably protects against some malignancies including prostate cancer (PC), but its impact on lethal PC is particularly unclear. OBJECTIVE To investigate the association between regular aspirin and (1) the risk of lethal PC in a large prospective cohort and (2) survival after PC diagnosis. DESIGN, SETTING, AND PARTICIPANTS In 1981/82, the Physicians' Health St...

Temperature has profound effects on ectotherms such as plants, invertebrates, and lower vertebrates (Hochachka and Somero 1984; Cossins and Bowler 1987). The impact of temperature is often depicted graphically as a “thermal performance curve,” which plots performance as a function of body temperature (Huey and Stevenson 1979). Typically, performance increases gradually with temperature up to so...

The suggestion that bed bug (Cimex spp.; Hemiptera: Cimicidae)-infested mattresses wrapped in black plastic and exposed to sunlight will be heated sufficiently to kill the bed bugs was tested. Two types of mattresses were tested: a thin mattress of solid foam rubber and a thick multilayered inner spring mattress. Temperature probes were placed on both upper and lower sides of the mattresses, wh...

Latitudinal comparisons of the Southern Ocean limpet, Nacella concinna, and clam, Laternula elliptica, acclimated to 0.0 degrees C, were used to assess differences in thermal response to two regimes, 0.0, 5.1 to 10.0 degrees C and 2.5, 7.5 to 12.5 degrees C, raised at 5.0 degrees C per week. At each temperature, tissue energy status was measured through a combination of O(2) consumption, intrac...

The band-winged grasshopper, Oedaleus asiaticus Bei-Bienko, is one of the most dominant and economically important grasshopper species in the steppe grasslands and farming-pastoral ecotone in northern China. It is a univoltine species and overwinters as eggs in soil. The cold hardiness of its eggs was examined in the laboratory. Water content in soil significantly affected the supercooling poin...

Marine turtles are vulnerable to climate change because their life history and reproduction are tied to environmental temperatures. The egg incubation stage is arguably the most vulnerable stage, because marine turtle eggs require a narrow range of temperatures for successful incubation. Additionally, incubation temperature affects sex, emergence success, morphology and locomotor performance of...

It has long been known that the physical factors of the environment exert profound effects on the various physiological activities of insects, and that temperature is one of the most important of these factors (Uvarov, 1931; Wigglesworth, 1953; Bursell, 1964). Within a biological range the reproductive activity of insects, like any other biological process, is enhanced by rise in temperature, b...