2. Behavioral Biology TALKS - Deutsche Zoologische Gesellschaft

6. Ecology TALKS
Invited speaker 1: Chair – Gerlind Lehmann A 702 / 11:30
Kathrin Lampert (Bochum)
Does it have to be sex? Ecological and evolutionary success of a clonal vertebrate,
Poecilia formosa
Author: Kathrin Lampert 1
Affiliation: 1 Ruhr University Bochum
Sexual and clonal reproduction have very different advantages and disadvantages.
While clonal reproduction ensures very high reproductive rates, sexual reproduction
produces genetically variable offspring that is highly adaptable to changing
environmental conditions. Depending on the environment one reproductive strategy
should therefore have a higher fitness than the other one and a co-existence of clonal
and sexual reproduction should not be possible.
Despite these theoretical considerations there are a few cases where a close cooccurrence
of sexual and clonal species with very similar ecological requirements can
be observed. One example is the clonal Amazon molly (Poecilia formosa) that, due to
its gynogenetic reproductive mode, depends on a close co-existence with one of its
sexually reproducing parental species, Poecilia mexicana or Poecilia latipinna. I am
investigating the advantages and disadvantages of both reproductive strategies and
try to understand which environmental and genetic factors allow their co-existence.
Sunday, September 23, 2012
Chair: Axel Hochkirch
�31 Holger Goerlitz A 702 / 12:00
Functional impacts of global warming on prey detection ability of echolocating bats
Authors: Holger R. Goerlitz 1 , Jinhong Luo 1 , Klemen Koselj 1 , Sándor Zsebek 1 , Björn M.
Siemers 1
Affiliation: 1 Max Planck Institute of Ornithology, Sensory Ecology Group, Germany
Many studies on climate change predicted shifts in the future distribution range of
plants and animals. Here we take a more functional perspective and explore the idea
that a rise of average temperature can affect the foraging efficiency of echolocating
bats in present day communities. Ambient temperature affects sound attenuation,
which determines the maximum distance over which bats can echolocate insects.
Sound attenuation is a non-linear function of both temperature and sound frequency
54