Sección Etología

Abstract Regulation of energy and water balance are primary components of homeostasis in all organisms. But the processes associated with such homeostasis can be costly and affect the fitness of individuals. As a result, individuals from variable environments are expected to invest more in compensatory mechanisms to maintain homeostasis than individuals from stable environments.

acta ethologica February 2019, Volume 22, Issue 1, pp 47–56 | Cite as Original Paper First Online: 24 October 2018 Shares 154 Downloads Abstract Males of some spider species lay silk threads on the female’s body during courtship and/or copulation. There are several hypotheses trying to explain the function of this behavior, known as bridal veil deposition.

For more than 60 years, sporadic cases of massive summer honey bee larvae mortality in colonies located near freshwater systems with abundant riparian vegetation have been reported in Uruguay. This odd phenomenon, known as “River disease” by beekeepers, can lead to colony death by depopulation. The aim of this study was to detect the causes of larvae death. Different experiments and analyses were performed using affected apiaries located between two important water courses.