行政院農業委員會台南區農業改良場  研究彙報第25號

台南地區野鼠密度測定及其族群變動

林文助 郭振欽 張賜海 黃榮作 何新奇 黃天福 郭白井

摘  要

林文助、郭振欽、張賜海、黃榮作、何新奇、黃天福、郭白井.1990.台南地區野鼠密度測定及其族群變動。台南區農業改良場研究彙報25:84~90。

台南地區近六年來,每年防除前田間野鼠密度測定結果,主要野鼠種類為鬼鼠(Bandicota nemorivaga Hodgson)、溝鼠(Rattus norvegicus Berkenhout)、小黃腹鼠(Rattus losea Swinhoe)、赤背條鼠(Apodemus agrarius Pallas)及月鼠(Mus formosanus Kurada)等五種,由於作物相及栽培制度之改變,如實施稻田轉作雜糧及農家畜牧業低弭影響,水稻及甘藷栽植面積銳減,使得鼠類族群密度亦起了變化,於1985∼1986年間,以月鼠的族群密度最高,平均每公頃有9.2隻,小黃腹鼠4.4隻次之,赤背條鼠3.7隻再次之。1987∼1988年間月鼠及小黃腹鼠之密度最不穩定,高低互見,到了1989∼1990年,小黃腹鼠族群密度已躍居第一位,平均每公頃有7.8隻,其次是赤背條鼠6.5隻,月鼠退居第三位5.3隻,鬼鼠及溝鼠之族群密度則低於前三種。防除後鼠類密度比防除前皆有明顯降低,1985∼1988年由於鄉鎮間所採用之藥劑不同,造成鼠類間防除率懸殊,介於53.3和91.3%之間,殘活密度每公頃為1.9∼0.2隻,到了1989∼1990年全面改用『可滅鼠』及『伏滅鼠』毒餌劑後,防除率普遍提高到82∼90%,公頃殘活密度亦降為1.3∼0.2隻。

關鍵詞:野鼠、密度測定、族群變動。

接受日期:1990年9月24日。


Faunistic Change of Wild Rats in Tainan District

Lin, W. J., J. C. Kuo, S. H. Chang, J. C. Hung, S. C. Ho, T. F. Hung, and P. C. Kuo

Summary

A filed survey of field rat in Tainan District was conducted since 1985-1990.  According to the results, following 5 species rats were recognized as important ones: Banadicota nemorivaga Hodgson, Rattus norvegicus Berkenhout, R. losea Swinhoe, Apodemus agrarius Pollas and Mus formosanus Kurada.  Among them, M. formosanus was the most dominant species during 1985-1986.  The density of M. formosanus, R. losea and A. agrarius were 9.2, 4.4 and 3.7 per ha, respectively.  While the population of R. losea showed a tendency of increase since 1987 and since 1989, R. losea replaced M. formosanus and became the most dominant species.  In 1990, the density of R. losea, A. agrarius, M. formosanus, and B. nemorivaga were recorded as 7.8, 6.5, 5.3, 0.9 and 0.1 per ha, respectively.  The changes of the rat fauna were suggested as due to the decrease of the paddy and sweet potato field.  The results obtained during 1985-1988 indicated that the effect of control varied with the rodenticides used.  The percents of control ranged between 53.3 and 91.3%.  Then only 0.2-1.9 rats are considered to be survived per ha.  When rodenticides were replaced by Klerat and Storm, the survived rats were remarkably reduced to 0.2-1.3 per ha in 1989-1990.

Accepted for publication: September 24, 1990.



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