Denní energetický výdej podzemního hlodavce rypoše \kur{Fukomys darlingi} v závislosti na velikosti skupiny a teplotě

Pavlína WIEDENOVÁ

Bachelor's thesis

Daily energy expenditure of subterranean rodent, mole-rat \kur{Fukomys darlingi}, in the relation with group size and temperature

Abstract:

Daily energy expenditure (DEE) was examined in the social subterranean rodent Mashona mole-rat (Fukomys darlingi) by the long-term (24 hours) indirect calorimetry. Individuals´ DEEs were compared with DEEs of grouped mole-rats (groups of 2, 3, 4 and 7) to establish the role of social thermoregulation (?huddling?) in this species at two different temperatures (20 and 30°C). The average DEE of single isolated individual was 1.84 ? 0.25 mlO2 g-1h-1 at Ta = 30°C and 2.99 ? 0.34 mlO2 g-1h-1 at Ta = 20°C. The influence of group size on daily energy expenditure (DEE) was observed. The energy savings rose with the increasing number of individuals up to 33.77% in group of seven. Maximal energy savings at 30°C were reached in group of three animals and did not increase further with an increasing number of animas in the group. Similarly at 20°C the maximal savings were observed when seven animals were present. My results confirm that social thermoregulation is an essential mechanism that saves energy expenditure of F. darlingi, which is important in the food-scarce underground environment.

Kľúčové slová

Sociální termoregulace, Fukomys darlingi, DEE, nepřímá kalorimetrie

Jazyk práce: Czech

Datum vytvoření / odevzdání či podání práce: 29. 4. 2011

Identifikátor: 17098

Obhajoba závěrečné práce

• Vedúci: doc. Mgr. Radim Šumbera, Ph.D.

UNIVERSITY OF SOUTH BOHEMIA IN ČESKÉ BUDĚJOVICE

Faculty of Science

Bachelor programme / odbor:
Biology / Biology