Journal ArticleDOI
Preference Versus Performance: Body Temperature of the Intertidal Snail Chlorostoma funebralis
TLDR
In laboratory experiments, the intertidal snail Chlorostoma funebralis was allowed to position itself on a temperature gradient, then measured its thermal preference and determined an index of how its performance varied with temperature, which resulted in a biased random walk along the temperature gradient.Abstract:
Evolutionary theory predicts that, in variable environments, it is advantageous for ectothermic organisms to prefer a body temperature slightly below the physiolog- ical optimum. This theory works well for many terrestrial organisms but has not been tested for animals inhabiting the hypervariable physical environment of intertidal shores. In laboratory experiments, we allowed the intertidal snail Chlorostoma funebralis to position itself on a temperature gradient, then measured its thermal preference and deter- mined an index of how its performance varied with temper- ature. Snails performed a biased random walk along the temperature gradient, which, contrary to expectations, caused them to aggregate where body temperature was 15 to 17 °C below their temperature of optimum performance and near the species' lower thermal limit. This "cold-biased" behavioral response may guide snails to refuges in shaded cracks and crevices, but potentially precludes C. funebralis from taking full advantage of its physiological capabilities.read more
Citations
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Journal ArticleDOI
Decreased thermal tolerance under recurrent heat stress conditions explains summer mass mortality of the blue mussel Mytilus edulis
TL;DR: The results are discussed in the context of an era of global change where heat events are expected to increase in intensity and frequency, especially in the eastern English Channel where the low frequency of commercially exploitable mussels already questions both their ecological and commercial sustainability.
Journal ArticleDOI
Thermopreference, tolerance and metabolic rate of early stages juvenile Octopus maya acclimated to different temperatures.
TL;DR: The results suggest that O. maya has an increased capability for adapting to moderate temperatures, and suggest increased culture potential in subtropical regions southeast of México.
Journal ArticleDOI
Shore-level size gradients and thermal refuge use in the predatory sea star Pisaster ochraceus: the role of environmental stressors
TL;DR: Data reveal that, despite generally mild conditions, Pisaster risk-avoidance strategy buffers against rare but highly stressful events, suggesting that in the field, size constraints prevent larger animals from occupying refuges that small individuals can use.
Journal ArticleDOI
Behavioral thermoregulation and critical thermal limits of giant keyhole limpet Megathura crenulata(Sowerby 1825) (Mollusca; Vetigastropoda).
Fernando Díaz,Ana Denisse Re,Alfredo Salas,Clara E. Galindo-Sánchez,Marco Gonzalez,Adolfo Sánchez,Carlos Rosas +6 more
TL;DR: The thermoregulatory behavior of the giant keyhole limpet Megathura crenulata was determined in a horizontal thermal gradient during the day at 18.9 °C and 18.3 °C for the night and in three acclimation temperatures 17, 20, and 23 °C.
Journal ArticleDOI
The effects of thermal acclimation on the behavior, thermal tolerance, and respiratory metabolism in a crab inhabiting a wide range of thermal habitats (Cancer antennarius Stimpson, 1856, the red shore crab)
Sergio Padilla-Ramírez,Fernando Díaz,Ana Denisse Re,Clara E. Galindo-Sánchez,Ana Lorena Sanchez-Lizarraga,Luis Antonio Nuñez-Moreno,Dalia Moreno-Sierra,Kurt Paschke,Carlos Rosas +8 more
TL;DR: The preferred temperature of Cancer antennarius determined with the acute method and with the gravitation method was 15.2 °C, and the thermal tolerance interval was 1.3, indicating that this species has a low tolerance indicative that it has evolved in highly stable environments.
References
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Book
An introduction to the bootstrap
Bradley Efron,Robert Tibshirani +1 more
TL;DR: This article presents bootstrap methods for estimation, using simple arguments, with Minitab macros for implementing these methods, as well as some examples of how these methods could be used for estimation purposes.
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Random walks in biology
TL;DR: This book is a lucid, straightforward introduction to the concepts and techniques of statistical physics that students of biology, biochemistry, and biophysics must know.
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Thermal Adaptation: A Theoretical and Empirical Synthesis
TL;DR: This Discussion focuses on the part of the history of thermal evolution and its role in climate change that has an impact on human well-being.
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The physiology of climate change: how potentials for acclimatization and genetic adaptation will determine 'winners' and 'losers'.
TL;DR: This work states that local extinctions from heat death may be offset by in-migration of genetically warm-adapted conspecifics from mid-latitude ‘hot spots’, where midday low tides in summer select for heat tolerance.