How oxidative stratus change during fish larvae organ development, growth and increase locomotor activity.
#fish #oxidativestress #lab29 #aquaculture #development
https://www.sciencedirect.com/science/article/abs/pii/S1095643323000661
Background Urban development results in habitat destruction, affecting populations of amphibians, the most fragile group of vertebrates. With changes in the environment, these animals become more exposed to light and predators. To enhance their chances of survival, they display plasticity of body coloration. Aside from adaptive benefits, animals exhibiting background matching meet the energetic costs and restrictions of changing body tones. To study the physiological consequences of Hyla arborea tadpole adaptation to background color, we followed oxidative stress parameters after rearing larvae on a constant background (black/white) and after changing the background color. Results Larvae cultivated for 20 days on constant substrate color exhibited differences in body coloration but without differences in lipid peroxidation (LPO) concentration between dark and pale individuals, suggesting that coloration investment during this period did not induce higher oxidative damage in darker tadpoles. Prolonged exposure of larvae (37 days) to a dark habitat increased antioxidative system defense and LPO concentrations, compared to animals reared permanently in the white surroundings. The positive correlation of oxidative damage with color intensity of individuals points to the physiological consequences of higher investment in the number of pigment cells necessary for dark pigmentation. In individuals faced with non-matching background and change in body coloration, defense system declined and LPO occurred relative to individuals cultivated in white habitat. Conclusion Here, we have pointed to consequences related to background matching and stress that amphibians experienced during chromatic adaptations. Background color change causes a complex physiological response affecting the antioxidative defense parameters. This investigation elucidates the accompanying cost of amphibiansʼ adjustment to an altered environment.
New study on effects of global warming on interspecific hybridization: oxidative cost in hybrids of crested newts
#hybridization #hybrids #amphibians #globalwarming #climatechange #oxidativestress #lab29
https://www.sciencedirect.com/science/article/pii/S0306456523000153
SEB magazine did interview about my work. You can read on link below
https://www.sebiology.org/magazine-publication/silico-in-biology/#p=42
Thanks for promoting scientists and their work. #amphibians #lab29 #oxidativestress #hybridization #pollution #promote #sebmagazine #physiology #ecology
Shelters are important for animal survival. Provision of adequate hiding places allow animals to express their natural sheltering behavior and it can have different positive effects on cortisol levels, physiological processes and mental performance. Although the absence of a refuge activates some stress response, its effect on oxidative stress has not been adequately examined. This study investigated whether the presence/absence of a shelter modifies the oxidative status (the antioxidant system and oxidative damage) and aggressive behavior of crested newt larvae (Triturus macedonicus and its hybrid with T. ivanbureschi). Our results show that individuals reared with shelters had lower values of the tested antioxidant parameters (catalase, glutathione peroxidase, glutathione S-transferase and glutathione), indicating a lower production of reactive species than individuals reared without shelter. The same pattern was observed in both T. macedonicus and its hybrid. Contrary to the activation of some physiological pathways, shelter availability did not significantly affect the rate of intraspecific aggressive behavior. The physiological benefits of shelter use can be manifested as a lower requirement for investment in the energy necessary for the maintenance of the upregulated antioxidant defenses, activation of repair systems and synthesis of endogenous antioxidants. This study highlights the importance of shelter provision, which may be valuable in habitat restoration and animal conservation studies.
I know that microplastic pollution is very actual topic during last years. My laboratory did comprehensive review using data from 500 studies (published 2010-2020) on different model organisms and experimental approaches. On link you can find paper that I hope can be useful for someone how is studying or wants to be involved in MPs. Special look at supplementary material. #microplastic #nanoplastic #modelorganisms #experiments #lab29 #pollution
Although we are witnesses of an increase in the number of studies examining the exposure/effects of microplastics (MPs) on different organisms, there are many unknowns. This review aims to: (i) analyze current studies devoted to investigating the exposure/effects of MPs on animals; (ii) provide some …
How stressful is metamorphosis in anurans, especially during metamorphic climax?
#bombina #anurans #amphibians #dessication #climatechange #oxidativestress #lab29
Marko Prokic
