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Microclimate of different types of roosts in temperate bats: a review
Oppelová, Tereza ; Lučan, Radek (advisor) ; Jahelková, Helena (referee)
Chiropteran (Chiroptera) are still not so much explored order. It may be because of their night activity, hidden way of life and in large measure misunderstanding and mistrustfulness of people. Despite of progress during of last decade many of species are still insufficiently explored. Temperate bats are exhibited to many adverse conditions. Low temperature, temperature instability and seasonal food shortages forces bats to reduce their energetically costs to minimum. The need to adapt to these conditions leads to make new adaptations like torpor, social thermo genesis and hibernation. The important role is also choice of suitable roost with protection not only of bad weather and predators, but also with suitable microclimate, which helps to bats with energetically management.
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Reproduction of Hawaiian red shrimp \kur{Halocaridina rubra}
HOMOLKA, Václav
Hawaiian red shrimp - Halocaridina rubra (order Decapoda; family Atyidae) is an endemic species originated from Hawaii Islands. It is adapted to a specific environment of underground systems and anchialine pools. Halocaridina rubra has a great potential for aquarium shrimps breeders as well as for researchers. The aim of this work was to: (1) document the reproduction of shrimp Halocaridina rubra and (2) determine the influence of selected chronobiological factors and presence/absence of a shelter for its reproduction. The experiment was realized in the aquarium room and chronobiological laboratory at the department of Biological disciplines at the Faculty of Agriculture, University of South Bohemia in České Budějovice. The experiment took three months (i.e. from 3 rd November 2014 to 3 rd February 2015). This experiment had 4 treatments each with two repetitions: on the light with and without a shelter, in the dark with and without a shelter. Experimental shrimps were put into the aquaria in the breeding groups: 10: 16 (female: male). The frequency of mating was evaluated. Neither the light conditions (12 h (light): 12 h (dark) or permanent dark) nor the presence of shelter had impact on the reproduction of Halocaridina rubra. The reproduction of shrimp Halocaridina rubra was documented. Spermatophore transfer, eggs, four larval stages of zoea type, megalopal stage and two juvenil stages are monitored. Recommendations for breeding have been developed. Anesthesia was tested by using eugenol (clove oil) in shrimps.
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