Do bigger bats need more time to forage?

Brazilian Journal of Biology

Cel. Esbérard²  Hg. Bergallo¹ 

[1] ,Universidade Federal Rural do Estado do Rio de Janeiro Instituto de Biologia Seropédica RJ ,Brazil

关键词: foraging time;    insectivorous bats;    feeding strategies;    southeastern Brazil;    Molossidae;    Vespertilionidae;    horário de forrageamento;    morcegos insetívoros;    estratégias alimentares;    sudeste do Brasil;    Molossidae;    Vespertilionidae;   

DOI  :  10.1590/S1519-69842008000400017

来源: SciELO

【 摘 要 】

We test the hypothesis is that bats using the same area and at the same time would be using similar preys, but they would have different foraging times due to specific differences in biomass. A total of 730 captures was analyzed 13 species of Vespertilionidae and Molossidae bats netted over a small dam in southeastern Brazil from 1993 and 1999. The relationship between the average time of captures and the biomass of the species of Vespertilinidae and Molossidae most frequent (captures > 4) was positive and significant (r = 0.83, p = 0.022, N = 7). Two lines are discussed to answer the longer foraging time for bigger bats: 1) larger insectivorous bats don't consume proportionally larger preys and 2) larger insects are less available.

【 授权许可】

CC BY   
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