Acoustic variability and its biological significance in nocturnal lemurs [Elektronische Ressource] / von Pia Braune

Pia Braune

Informations

• Publié par: gottfried_wilhelm_leibniz_universitat_hannover
• Publié le: 01 janvier 2007
• Nombre de lectures: 50
• Poids de l'ouvrage: 2 Mo

Extrait

Acoustic variability and its biological significance
in nocturnal lemurs



Von der Naturwissenschaftlichen Fakultät
der Gottfried Wilhelm Leibniz Universität Hannover


zur Erlangung des Grades
Doktorin der Naturwissenschaften

Dr. rer. nat.

genehmigte Dissertation

von

Dipl.-Biol. Pia Braune

geboren am 06.08.1973 in Peine




2007


























Referentin: Prof. Dr. Elke Zimmermann
Korreferent: Prof. Dr. Uwe Jürgens
Tag der Promotion: 12.09.2007Contents 1
Contents
1 Abstract............................................................................................................................ 3
2 Zusammenfassung .......................................................................................................... 4
3 General introduction ...................................................................................................... 5
3.1 Animal communication ........................................................................................... 5
3.2 Acoustic variability on the inter- and intra-species level ........................................ 6
3.3 Malagasy lemurs...................................................................................................... 8
3.4 Model species of nocturnal lemurs.......................................................................... 9
3.5 Intra-specific variation in acoustic communication of two species of nocturnal
lemurs .................................................................................................................... 11
3.6 Inter-specific variation and species-specificity in acoustic communication of
mouse lemurs......................................................................................................... 12
3.7 Aim of the study.................................................................................................... 14
4 Study 1- Spacing and group coordination in a nocturnal primate, the golden
brown mouse lemur (Microcebus ravelobensis): the role of olfactory and acoustic
signals............................................................................................................................. 16
4.1 Introduction ........................................................................................................... 17
4.2 Methods................................................................................................................. 18
4.2.1 Study site and data sampling................................................................... 18
4.2.2 Marking behaviour .................................................................................. 21
4.2.3 Sound recording and analysis.................................................................. 21
4.3 Results ................................................................................................................... 24
4.3.1 Spacing.................................................................................................... 24
4.3.2 Behaviour during dispersal and reunion ................................................. 25
4.3.3 Marking behaviour .................................................................................. 25
4.3.4 Vocal behaviour ...................................................................................... 26
4.3.5 Context of acoustic signals...................................................................... 26
4.3.6 Trill structure........................................................................................... 27
4.3.7 Group specific signatures of trills ........................................................... 28
4.4 Discussion ............................................................................................................. 29
4.4.1 Spacing.................................................................................................... 29
4.4.2 Marking behaviour .................................................................................. 29
4.4.3 Vocal behaviour ...................................................................................... 30
4.4.4 Group-specific acoustic signatures ......................................................... 31
4.5 Conclusion............................................................................................................. 32
5 Study 2 - Loud calling, spacing, and cohesiveness in a nocturnal primate, the
Milne Edwards' sportive lemur (Lepilemur edwardsi)............................................... 33
5.1 Introduction ........................................................................................................... 34
5.2 Methods................................................................................................................. 35
5.2.1 Study site and animals............................................................................. 35
5.2.2 Data collection and processing................................................................ 36
5.2.3 Statistical analysis ................................................................................... 39 2 Contents
5.3 Results ................................................................................................................... 40
5.3.1 Sleeping associations .............................................................................. 40
5.3.2 Home ranges and overlap........................................................................ 40
5.3.3 Loud calling behaviour ........................................................................... 41
5.3.4 Sex and individual identity in loud calls ................................................. 42
5.4 Discussion ............................................................................................................. 47
5.4.1 Spacing and cohesion within and between male-female pairs................ 47
5.4.2 Functions of loud calling......................................................................... 48
5.4.3 Loud calling between pair partners, and its evolution among primates.. 49
5.5 Conclusions ........................................................................................................... 50
6 Study 3 - Specific acoustic divergence in communication of cryptic species of
nocturnal mammals: social calls and their perception in Malagasy primates
(Microcebus ssp.) ........................................................................................................... 51
6.1 Introduction ........................................................................................................... 52
6.2 Methods................................................................................................................. 53
6.2.1 Recording and analysis of advertisement calls ....................................... 53
6.2.2 Playback experiments.............................................................................. 54
6.3 Results ................................................................................................................... 57
6.3.1 Interspecific comparison of advertisement calls ..................................... 57
6.3.2 Behavioural responses to advertisement and short whistle stimuli......... 59
6.4 Discussion ............................................................................................................. 61
6.4.1 Species-specific structure in advertisement calls.................................... 62
6.4.2 Species-specific call recognition............................................................. 62
7 General discussion ........................................................................................................ 64
7.1 Factors influencing the acoustic variability on the inter-and intra-species level .. 64
7.1.1 Inter-specific acoustic variability............................................................ 65
7.1.2 Inter- and intra-specific acoustic variability............................................ 66
7.1.3 Intra-specific acoustic variability............................................................ 68
7.2 Intra-specific acoustic variability in mouse and sportive lemurs .......................... 70
7.3 Inter-specific acoustic variability in cryptic mouse lemurs and its biological
significance............................................................................................................ 72
7.3.1 The effect of sympatry and allopatry ...................................................... 74
7.3.2 Evolutionary aspects of inter-species call variability in mouse lemurs .. 75
7.4 Inter-specific comparison of the acoustic variability between mouse and
sportive lemurs ...................................................................................................... 76
7.4.1 Biological function of loud calls – the effect of social organisation....... 78
7.5 Evolution of long distance calls in primates ......................................................... 80
7.6 Concluding remarks .............................................................................................. 82
8 References..................