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研究生:陳惇聿
研究生(外文):Tun-Yu Chen
論文名稱:莫氏樹蛙雄蛙宣告叫聲及雌蛙選擇
論文名稱(外文):Male advertisement call and female choice in Moltrecht's treefrog, Rhacophorus moltrechti, from Taiwan
指導教授:侯平君侯平君引用關係
指導教授(外文):Ping-Chun Hou
學位類別:碩士
校院名稱:國立成功大學
系所名稱:生物學系碩博士班
學門:生命科學學門
學類:生物學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:英文
論文頁數:55
中文關鍵詞:莫氏樹蛙
外文關鍵詞:Rhacophorus moltrechti
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有效率的聲音訊息傳遞系統在蛙類的生殖成功率上扮演重要的角色。大部分的蛙類都發展出優良的聲音訊息傳遞系統,雄蛙以鳴叫方式來宣告自己所佔有的領域和吸引雌蛙主動接近以形成配對。本實驗收集並分析南仁山地區之莫氏樹蛙(Rhacophorus moltrechti)族群的雄性宣告叫聲,莫氏樹蛙宣告叫聲由慢速段落及快速段落組成。雄性個體內的叫聲特質如:叫聲長度、慢速段落及快速段落的節數有很大的變異;而慢速段落及快速段落的基礎頻率則變異程度較小。為了瞭解莫氏樹蛙雄蛙宣告叫聲結構與雌蛙選擇之關係,我設計兩組聲音刺激,以回播實驗來研究雌蛙對於雄蛙宣告叫聲的辨識及偏好。結果顯示:在以噪音與不同宣告叫聲配對的實驗中,大部分的雌蛙會選擇慢速段落及慢速段落的第一小節,但選擇快速段落的雌蛙數目與選擇噪音的雌蛙數目並無顯著差異。此外,宣告叫聲中帶有正常節數的快速段落比節數較少的快速段落對雌蛙更具有吸引力。但是,快速段落過長的宣告叫聲並不能顯著地引起雌蛙偏好。上述結果顯示莫氏樹蛙雄蛙宣告叫聲中之慢速段落的第一小節能提供雌蛙作為同種辨識的訊息,且緊接在後的快速段落能加強雌蛙趨向聲源的反應。
Effective acoustic communication system plays an important role in reproductive success of anurans. Generally, male frogs produce advertisement calls to attract females, and females make a choice to mate. I collected and analyzed the male advertisement calls of Rhacophorus moltrechti from Nanjenshan Reserve, Taiwan. The male advertisement calls are composed of a slow phase with low pulse repetition rate and a fast phase consisting of 0-10 notes. The call duration and the numbers of notes in the slow and the fast phases are highly variable, however, the fundamental frequencies of the slow and the fast phases are more static. In order to understand the male call structures functioning for female recognition and female preference, I used two-choice playback experiments with two sets of sound stimuli to investigate the female responses by. The results showed that majority of the females selected the slow phase call and the leading note of slow phase call rather than the noise. The numbers of females responded to the fast phase alone were not significantly different from those responded to the noise. Furthermore, calls with normal fast phase are more attractive to the females than those with shorter fast phase. However, calls with longer than normal fast phase did not increase the attractiveness to the females. These results suggest the leading note of slow phase in the advertisement call contains the information for conspecific recognition and the fast phase attaching to the slow phase enhances the female phonotactic responses.
CONTENTS
CHINESE ABSTRACT......I
ENGLISH ABSTRACT......Ⅱ
ACKNOWLEDGMENTS......Ⅲ
LIST OF TABLES......Ⅵ
LIST OF FIGURES......Ⅶ
CHAPTER
1. INTRODUCTION......1
1.1 Sexual selection......1
1.2 Mating involves male display and female choice in many animal species......1
1.3 Anuran mating......2
1.4 Previous anuran studies for male call and female choice......4
1.5 Acoustic properties and preference......6
1.6 Previous studies in Rhacophorus moltrechti......7
1.7 Purpose......8
2. MATERIALS AND METHODS......10
2.1 Study animal......10
2.2 Vocalization collection, analysis and synthesis......11
2.3 Experimental design......11
2.4 Experimental setups......12
2.5 Experimental protocols......12
2.6 Statistical analyses......13
3. RESULTS......16
3.1 Static and dynamic properties of
Advertisement calls of Rhacophorus moltrechti......16
3.2 Phonotactic responses of female......16
3.3 Call structures for species recognition......17
3.4 Call structures preferred by the females......17
4. DISCUSSION......18
4.1 Static and dynamic properties of advertisement call of Rhacophorus moltrechti......18
4.2 Call structures for species recognition......19
4.3 Call structures for female preferences......20
4.4 Improving anuran female choice experiments in the future......22
REFERENCES......24
TABLE1......28
FIGURE1~8......29
APPENDLIX I......37
APPENDLIX II......38
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