Short communication: Storage time and temperature affect plasma osmolality values in field-collected blood samples

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Год журнала: 2024, Номер 295, С. 111665 - 111665

Опубликована: Май 16, 2024

Язык: Английский

---

Climatic Variability Shapes Plasticity of Hydric and Thermal Physiology in Tropical Geckos

Опубликована: Июнь 17, 2024

Phenotypic plasticity in reptiles is a key mechanism enabling individuals to maintain and optimize physiological responses changing environments. The ability adjust metabolic rates thermal physiology response seasonal changes known be central the ecology of some reptiles, but less about reptiles’ exhibit flexibility evaporative water loss (EWL). Physiological acclimatization was measured six species geckos genus Gehyra from highly tropics northern Australia. Four mesic, more thermally stable site did not have differences preference (Tp), Tp significantly lower during cooler dry season three semi-arid, variable site. EWL (42% 78%) compared wet for all species. For most species, decreased rapidly early season, then continued minimum late season. There no relationship between extent geographic range size. These results demonstrate high imply cost maintaining low EWL, basis which requires further study.

Язык: Английский

---

No Evidence for the Melanin Desiccation Hypothesis in a Larval Lepidopteran

Опубликована: Янв. 1, 2024

Water regulation is an important physiological challenge for insects due to their small body sizes and large surface area volume ratios. Adaptations decreasing cuticular water loss, the largest avenue of are especially important. The melanin desiccation hypothesis states that molecules in cuticle may help prevent thus offering protection from desiccation. This has primarily been studied Drosophila remains mostly untested other taxa, including Lepidoptera. In this study we investigated role prevention white-lined Sphinx moth, Hyles lineata (Lepidoptera, Sphingidae), which shows high plasticity degree pigmentation during late larval instars. We took advantage used density treatments induce a wide range melanization; solitary conditions induced low while crowded pigmentation. tested whether more melanic larvae treatment better protected two relevant responses: i) total loss over period ii) evaporative through cuticle. did not find support species. Although influenced effect occur via melanization. Interestingly, implies crowding, was phenotypes, have effects influence regulation. There were no differences between loss. Additionally, there hemolymph osmolality change. However, conclude does reflect measures or dehydration well lepidopteran larvae. emphasizes context dependency melanin's importance considering how it vary across taxa environments. constantly feeding phytophagous insects, such as larvae, be limiting thus, play preventing

Язык: Английский

---

Water availability and temperature as modifiers of evaporative water loss in tropical frogs

Integrative and Comparative Biology, Год журнала: 2024, Номер unknown

Опубликована: Июнь 5, 2024

Synopsis Water plays a notable role in the ecology of most terrestrial organisms due to risks associated with water loss. Specifically, loss animals happens through evaporation across respiratory tissues or epidermis. Amphibians are ideal systems for studying how abiotic factors impact since their bodies often respond quickly environmental changes. While effect temperature on is well known many taxa, we still learning combination humidity availability affects Here, tested standing sources (availability) and (26 36°C) together affect anuran amphibians using Bayesian framework. We also present conceptual model considering may interact, resulting body mass After accounting phylogenetic time autocorrelation, determined different variables (water uptake rates, temperature, size) three species tropical frogs (Rhinella marina, Phyllobates terribilis, Xenopus tropicalis). found that all impacted changes, greater similarities between P. terribilis X. tropicalis, but only showed terribilis. Furthermore, describe behavior might its budget. This study shows manage budgets environments important developing models evaporative distributions.

Язык: Английский

---

No evidence for the melanin desiccation hypothesis in a larval Lepidopteran

Journal of Insect Physiology, Год журнала: 2024, Номер 156, С. 104669 - 104669

Опубликована: Июнь 25, 2024

Язык: Английский

---

Water Balance of Three Lizard Species in a Semi-Arid Region

Опубликована: Янв. 1, 2024

Язык: Английский

---

Patterns of seasonal plasticity in evaporative water loss and preferred temperature in three geckos of the wet–dry tropics

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Ноя. 14, 2024

Seasonal physiological plasticity (acclimatisation) facilitates homeostasis in changing environments and has been studied extensively with respect to thermal biology metabolism. Less is known about seasonal changes evaporative water loss (EWL) response availability humidity. The wet–dry tropics of northern Australia experiences moderate temperature changes, but substantial rainfall We three gecko species (Amalosia rhombifer, Heteronotia binoei Hemidactylus frenatus) the wet dry seasons their EWL, preferred body temperatures (T_pref), choice between a humid refuge at below T_pref. EWL was significantly lower season (66% values). T_pref for two did not change seasonally, A. rhombifer selected during warmer season. Given refugia, low never over warm microhabitat. When both refugia were temperature, only showed significant preference These results demonstrate that although thermoregulation prioritised short term, hydroregulation (physiological EWL) adjusted longer shifts occurring on scale. However, previous studies suggest may occur prevailing weather conditions an even shorter timescale. Before broad generalisations can be drawn phenomenon plasticity, measurements need taken from more different climatic regions ecologically relevant timescales.

Язык: Английский

---