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題名 | 臺灣產山椒魚之研究(2):阿里山地區山椒魚之族群生態研究 |
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作者 | 陳世煌; 呂光洋; | 書刊名 | 師大生物學報 |
卷期 | 21 1986.12[民75.12] |
頁次 | 頁47-72 |
分類號 | 388.6 |
關鍵詞 | 山椒魚; 生態; 阿里山; 族群; 臺灣; |
語文 | 中文(Chinese) |
中文摘要 | 本研究從民國七十一年十二月起至七十四年六月止,於阿里山設定樣區,以標放法長期追踪調查阿里山山椒魚之族群生態。結果顯示山椒魚的分布集中於水道5公尺以內(70 %以上),可能受到食物和習性的影響。季節也會影響其分布,乾季時山椒魚較集中於水邊,雨季較分散,可能與濕度、溫度和生殖有關;吻肛長的大小亦影響其分布,小山椒魚(SVL < 25 mm)與成體(SVL ≥ 45rnm)較近水邊活動,二者無顯著差異,而年輕的個體(SVL介於25~ 45mm間) 較遠離水道活動,與小山椒魚和成體間有顯若差異。 活動範圍一般均很小,在0.02~ 12.47 m2之間。水邊活動者其活動範團成長條形,與水道平行,並有重疊的情形,而遠離水道者,則無比現象。但人為劇烈破壞其棲所時,會造成山椒魚的長距離遷移。 由標放法證實A樣區和B樣區山椒魚的移動無顯著不同。單位面積捕獲率和族群密度都以春季為最高,B樣區大於A樣區,這是由於B樣區面積狹小,各點距水道近,適於山椒魚棲息之故,捕獲量和族群估算值以春季最高,秋冬季最少。每年三月A樣區可捕獲大量小山椒魚,推測其生殖季節應在冬季。 |
英文摘要 | The present study was done in Alishan area of Taiwan from De-cember 1982 to June 1985. Re-sults indicated that more than 70% of Formosan salamanders (Hynobius formosanus ) are found near creeks; no more than 5m from water. The distribution is influenced by the body size (SVL) and humidity. Salamanders congrated near the creeks during the dry season (Nov. to Apr.) and scat tered away in the wet season (May to Oct.). By ANOVA test, there was no signi-ficant difference on distribution patterns between young (SVL < 25 mm) and adults (SVL ≥ 45mm) , while the distribution of juveniles ( 25mm ≤ SVL < 45mm) was si-gnificantly different ( p < 0.01) from adults. Home ranges of Formosan sa-lamanders are usually small. The size of home ranges from 26 ani-mals measured falls between 0.02 and 12.47 m2. They are paralleled to creeks and overlapped each other. Habitat disturbance would make sa-lamanders to migrate a longer di-stance. There was no significant differ-ence on migratory rates of sala-manders between study area A and B. Concerning to the population density, study area B was much higher than area A. There was a high percentage of finding younger salamanders (SVL < 16.5 mm) during March. This could be inter-preated that H. formosanus breeds in winter season on Alishan area. |
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