2. Behavioral Biology TALKS - Deutsche Zoologische Gesellschaft

opaque screen, females showed no mate-choice copying. In experiments testing
alternative explanations, females did not change mate choice when only males or
only females of both phenotypes were presented in experiments. Our experiments
showed that a certain amount of interaction (acoustic and visual) between the
adorned male and the female is necessary for observing females to change mate
choice. A physical interaction or even copulation are not necessary. We also ruled out
that the presence of and the physical interaction between two birds of the same sex
did affect females´ mate choices. Thus, our results showed that so far alternative
mechanisms cannot explain mate-choice copying in female zebra finches.
����85 Gregor Kölsch
Where do you come from? ? Sagrinae and Donaciinae (Coleoptera, Chrysomelidae)
harbor similar bacterial endosymbionts
Authors: Gregor Kölsch, Dimitra Synefiaridou
Affiliations: 1 Molecular Evolutionary Biology, Zoological Institute, University of
Hamburg
Many insects live in symbiosis with bacteria. The origin of such mutualistic
associations often remains unclear. In order to shed light on the evolution of the
symbiosis between reed beetles (Coleoptera, Chrysomelidae, Donaciinae) and
intracellular symbionts belonging to the Enterobacteriaceae, we searched for similar
bacteria in other beetle groups. Three criteria directed our search: phylogenetic
proximity of the host, similarity of the mycetomes containing the bacteria, and
cocoon formation of the beetle larvae (in Donaciinae the bacteria provide the cocoon
material). We analyzed the partial sequence of the 16S rRNA of bacteria we found in
other beetle groups (Cerambycidae, Anobiidae, other Chrysomelidae). We discuss the
ecology of each association in the context of the phylogenetic analysis. The bacteria
in Sagra femorata (Chrysomelidae, Sagrinae) are very closely related to those in the
Donaciinae and are located in similar mycetomes. The Sagrinae build a cocoon for
pupation like the Donaciinae, in which the bacteria produce the material required for
the cocoon. These aspects support the close relationship between Sagrinae and
Donaciinae. This is in line with earlier studies and makes a common ancestry of the
symbioses likely. Using PCR primers specific for fungi, we found Candida sp. in the
mycetomes of a cerambycid beetle along with the bacteria.
����87 Hyuk Lee
Handed foraging behavior in scale-eating cichlid fish: does head asymmetry predict
feeding direction?
Author(s): Hyuk Je Lee 1/3 , Henrik Kusche 1/2 , Axel Meyer 1/2
Affiliation: 1 Lehrstuhl für Zoologie und Evolutionsbiologie, Department of Biology,
University of Konstanz; 2 International Max Planck Research School for
Organismal Biology, University of Konstanz; 3 Zukunftskolleg, University of
Konstanz
The scale-eating cichlid fish, Perissodus microlepis, from Lake Tanganyika is a
textbook example for the extreme degree of morphological and ecological
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