title: Sex matters in echoacoustic orientation: gender differences in the use of acoustic landmarks in Phyllostomus discolor (lesser spear-nosed bat).
abstract: Sex-specific differences in orientation strategies are well known for several rodent and primate species with females relying more on landmarks when it comes to visually guided orientation, whereas males preferentially use Euclidean cues. We used the echolocating bat Phyllostomus discolor for a behavioural study on gender differences in the use of acoustic landmarks. The experimental animals (6 males, 6 females) had to learn and perform a simple orientational task, firstly in the absence of landmarks and subsequently in the presence of four acoustic landmarks of which one was occasionally removed during the critical experiment. The results presented here show that gender differences in the use of acoustic landmarks exist in P. discolor, which supports our hypothesis that the phenomenon is independent of the modality that is used to sense the environment during orientation. Therefore, our findings allow for the prediction of similar phenomena in other acoustically orienting mammals. Interestingly, due to the specific ecology of P. discolor, our results partially contradict the evolutionary theories on gender-specific orientation, as will be discussed. Finally, we consider our finding as being one of several important steps toward establishing bats as a new model organism in neuroscientific studies on allocentric spatial cognition in mammals.
authors.affiliation: Auditory Neuroethology and Neurobiology, Institute of Zoology, University of Veterinary Medicine Hannover, Buenteweg 17, 30559, Hannover, Germany. Daniel.Schmidtke@tiho-hannover.de
authors.forename: Daniel
authors.initials: D
authors.lastname: Schmidtke
authors.forename: Karl-Heinz
authors.initials: KH
authors.lastname: Esser
mesh_terms: D000162:Acoustics; D000818:Animals; D002685:Chiroptera / Q000502:physiology* / Q000523:psychology; D004193:Discrimination Learning / Q000502:physiology; D004455:Echolocation / Q000502:physiology*; D005260:Female; D005426:Flight, Animal / Q000502:physiology; D008297:Male; D009949:Orientation / Q000502:physiology*; D046709:Pattern Recognition, Physiological / Q000502:physiology; D012727:Sex Characteristics; D013028:Space Perception / Q000502:physiology*; D014828:Vocalization, Animal / Q000502:physiology
references.citation: Proc Natl Acad Sci U S A. 1990 Aug;87(16):6349-52
references.pmid: 2201026
references.citation: Cognition. 2004 Apr;91(3):221-57
references.pmid: 15168896
references.citation: Behav Processes. 2009 Mar;80(3):247-51
references.pmid: 20522315
references.citation: Brain Res. 1971 Nov;34(1):171-5
references.pmid: 5124915
references.citation: Psychoneuroendocrinology. 1991;16(1-3):155-76
references.pmid: 1961837
references.citation: Hippocampus. 1999;9(4):346-51
references.pmid: 10495017
references.citation: Nature. 2003 Sep 11;425(6954):184-8
references.pmid: 12968182
references.citation: Proc Biol Sci. 2005 Jan 22;272(1559):179-86
references.pmid: 15695209
references.citation: Biol Rev Camb Philos Soc. 2009 Feb;84(1):161-72
references.pmid: 19183335
references.citation: Annu Rev Psychol. 1989;40:155-89
references.pmid: 2648974
references.citation: J Exp Biol. 2005 Dec;208(Pt 23):4399-410
references.pmid: 16339860
references.citation: Nat Neurosci. 2007 Feb;10(2):224-33
references.pmid: 17220886
references.citation: Horm Behav. 1998 Oct;34(2):183-98
references.pmid: 9799628
references.citation: J Neurophysiol. 2001 Jan;85(1):105-16
references.pmid: 11152711
references.citation: Physiol Behav. 1999 Dec 1-15;68(1-2):81-6
references.pmid: 10627065
references.citation: J Comp Neurol. 1993 Nov 8;337(2):334-52
references.pmid: 8277006
references.citation: Neuron. 2004 Apr 22;42(2):283-95
references.pmid: 15091343
references.citation: J Int Neuropsychol Soc. 2002 Sep;8(6):804-10
references.pmid: 12240744
references.citation: Proc Natl Acad Sci U S A. 2002 Feb 5;99(3):1431-6
references.pmid: 11805285
references.citation: Psychol Rev. 1948 Jul;55(4):189-208
references.pmid: 18870876
references.citation: Brain Behav Evol. 2006;67(3):165-76
references.pmid: 16415571
references.citation: Brain Res Cogn Brain Res. 1998 Apr;6(4):351-60
references.pmid: 9593991
references.citation: J Endocrinol. 1966 Dec;36(4):415-6
references.pmid: 5926956
references.citation: Psychol Rev. 2003 Apr;110(2):285-315
references.pmid: 12747525
references.citation: Behav Neurosci. 2005 Feb;119(1):118-26
references.pmid: 15727518
references.citation: J Comp Physiol A. 1996 Aug;179(2):245-54
references.pmid: 8765560
references.citation: Brain Res. 2004 Jul 16;1014(1-2):97-109
references.pmid: 15212996
references.citation: Science. 2001 Dec 14;294(5550):2348-51
references.pmid: 11743200