Eight new species of Nemoura are proposed from specimens collected in Thailand and Vietnam. New species include N. apicalis sp. n., N. clavaloba sp.n., N. magniseta sp.n. N. stylocerca sp. n. and N. tenuiloba sp.n. from Vietnam, and N. neospiniloba sp.n., N. raptoraloba sp.n. and N. spinacerca sp.n. from Thailand. A provisional key for male Nemoura from Thailand and Vietnam is presented.
COBISS.SI-ID: 903157
Electron transport system (ETS) activity and oxygen consumption of two amphibious isopods, epigean Ligia italica and hypogean Titanethes albus, were measured in air and in water with the aim of estimating the exploitation of metabolic potential for actual metabolism in the two media. Both species exhibited high and variable ETS/R ratio which is characteristic of animals that have to cope with changing environmental conditions in their habitats.
COBISS.SI-ID: 2212431
The physiological responses of two crustaceans, Asellus aquaticus and Gammarus fossarum, following the exposure to two pesticides were measured. Both species responded to short-term exposure with elevated levels of respiration (R) and/or lower levels of electron transport system (ETS) activity. The combination of these two methods provides a useful and effective tool for assessing the general condition of aquatic animals. ETS/R ratio may be used as a quick predictor of effects on organisms exposed to pesticides.
COBISS.SI-ID: 2105423
Nosema sp. influences flight behaviour of infected honey bee foragers. We investigated whether the microsporidia Nosema sp. affects behaviour and losses of forager honey bees. Bees infected with nosema were lost more frequently after release in close vicinity of the hive. If return, they took longer time to arrive. Infected bees showed also impaired orientation. The similar behavioural changes were observed in bees infested with the parasitic mite Varroa. This indicates that the modified behaviour is a general response of honey bees to pathogens to decrease infection in the colony.
COBISS.SI-ID: 2186831
In this study it was found that the male responsiveness was reduced in the presence of heterospecific vibrational signals or when noise from conspecific signals obscured the species-specific temporal pattern. In contrast, the presence of two sources of conspecific female songs with species specific signal repetition time had a positive effect on male responsiveness. Searching activity was less affected than male signaling by interfering background signals. Increased signal-to-noise ratio restored male responsiveness to the level expressed in unilateral stimulation with conspecific female song.
COBISS.SI-ID: 2256719