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題名:Age, Reproduction, and Demography of the Spiny Rat (Muridae: Niviventer coxingi) in Subtropical Central Taiwan    
臺灣中部亞熱帶山地森林刺鼠族群之年齡、生殖與人口統計研究
著者:Hon-Tsen Yu(于宏燦) ;Yao-Sung Lin(林曜松)
出版地區:台灣
出版城市:台北市
學科:生命科學 ; 醫學綜合
關鍵字:臼齒磨痕 ; 雌雄二型 ; 性比 ; 生活史 ; 生殖季節 ; Tooth wear ; Sexual dimorph ism ; Sex ratio ; Life history ; Breeding season
刊名:Zoological Studies 
頁碼:153-163
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

我們研究臺灣中部山區一個刺鼠族群的生殖週期與人口統計變化。生殖活動係以觀察外生殖器官和性腺組織切片來判定。年齡則利用臼齒磨損程度來界定,共訂出五個年齡群;我們也利用判別分析檢定五個年齡群的可信度。刺鼠在體重和成熟年齡上兩性不同;年輕雄鼠(年齡Ⅲ以前)體重和雌鼠並無差異,年長雄鼠(年齡Ⅳ和Ⅴ)則較雌鼠為重。雌鼠較雄鼠先達性成熟。雖然中部山區的氣候有顯著的季節性,但刺鼠並無明顯的生殖季節。雄鼠在性成熟後可持續生殖,而且在不同季節內,族群中有多數的雄鼠處於生殖狀態。雌鼠亦屬於終年生殖型。人口統計學的分析顯示,在不同季節內皆有幼鼠加入族群,此一結果亦顯示刺鼠終年可生殖。最後,我們比較刺鼠和森鼠的生活史特徵和生態特性。
Annual reproductive cycles and demographic changes in a wild population of the spiny rat (Niviventer coxingi) in central Taiwan were studied. Reproductive status of the rat was investigated by autopsy and histological examination of the testes and ovaries. Age of each animal was categorized into one of 5 age classes by examining wear patterns of the upper molars. Using the 5 age classes as a priori groupings, a discriminant function analysis on 4 body and 23 cranial measurements was used to crosscheck the reliability of the age criteria by tooth wear. The rat shows sexual dimorphism in body weight and timing of sexual maturity. However, the dimorphism is age dependent: only males of age class Ⅲ or older become heavier than females, and yet females gain sexual maturity at a younger age than males. Despite climatic seasonality in its natural habitats, the rat does not have a limited breeding season. Males remain potent after sexual maturity and large proportions of males in the population breed in every season. Females breed in all seasons. Nonetheless, fewer breeding females were present in the coldest months of the year. Demographic analysis across 15 mo indicates that young rats are recruited in all seasons, supporting the conclusion that the spiny rat can breed year round. Finally, we compare features of life histories and ecological characteristics between N. coxingi and Apodemus semotus.


    

本卷期目次
Zoological Studies 
Analysis of Scleractinian Distribution in Taiwan Indicating a Pattern Congruent with Sea Surface Temperatures and Currents: Examples from Acropora and Faviidae Corals/ Chao-Lun Allen Chen
Marine Fish Fauna in Hong Kong Waters/ I-Hsun NiKai-Yin Kwok
Age, Reproduction, and Demography of the Spiny Rat (Muridae: Niviventer coxingi) in Subtropical Central Taiwan/ Hon-Tsen YuYao-Sung Lin
Morphology of Uca formosensis Rathbun, 1921 (Crustacea: Decapoda: Ocypodidae), an Endemic Fiddler Crab from Taiwan, with Notes on its Ecology/ Hsi-Te ShihHin-Kiu MokHsueh-Wen ChangSin-Che Lee
Studies on Epizootiology and Pathogenicity of Staphylococcus epidermidis in Tilapia (Oreochromis spp.) Cultured in Taiwan/ Shih-Ling HuangWei-Cheng ChenMei-Chuan SheiI-Chiu LiaoShiu-Nan Chen
TBT (Tributyltin) Toxicity to the Visual and Olfactory Functions of Tigerperch (Terapon jarbua Forsskal)/ Dar-Yi WangBao-Quey Huang
Crabs of the Family Parthenopidae (Crustacea: Decapoda: Brachyura) from Taiwan/ Swee-Hee TanJung-Fu HuangPeter Kee-Lin Ng
Review of Bernhauer's Types of Aleochara from South America (Coleoptera: Staphylinidae: Aleocharinae)/ Jan KlimaszewskiChristian Maus
Discovery of a New Pierid Butterfly, Aporia gigantea cheni Hsu and Chou (Lepidoptera: Pieridae), from Taiwan/ Yu-Feng HsuWen-I Chou
The Taxonomy of Sesarma tang; Rathbun, 1931 and S. storm; De Man, 1895 (Crustacea: Decapoda: Brachyura: Grapsidae: Sesarminae), with Establishment of a New Genus for S. stormi/ Peter K. L. NgHung-Chang Liu
Lecithoceridae (Lepidoptera) of Taiwan (Ⅰ): Subfamily Lecithocerinae: Genera Homaloxestis Meyrick and Lecithocera Herrich-Schaffer/ Kyu-Tek Park
 
   
 
   

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