- 期刊
- OpenAccess
Taxonomy and Distribution of the Genera Pteria and Pinctada(Bivalvia:Pteriidae)in Taiwan
臺灣沿岸海域鶯蛤科(Pteriidae)之分類與分布
摘要
利用多變量形態形質之變異來推定台灣附近海域產紅尾圓鰺的系群結構。在本研究種之生殖與非生殖季期間，分別於台灣東北部（基隆和南方澳）及西南部（高雄和東港）共收集7個樣本，184個體。每個體量測19個形態形質，所得之資料再以多群主成份分析法(MGPCA)校正個體大小變異所造成之影響。校正後之資料先計算各群間之曼哈頓距離，以未加權配對平均法建構7個樣本之系統樹。利用置換排列分析法檢定由集群分析法分析所得之各群間之形質差異是否顯著。分析之結果如下：(1)紅尾圓鰺之外部形態形質，在生殖與非生殖季節間有顯著的不同；(2)不管是生殖或非生殖季節，台灣東北部及西南部產之紅尾圓鰺外部形態形質皆有顯著的差異。根據以上之結果顯示，台灣附近海域產之紅尾圓鰺至少應有兩個外部形態不同的系群存在，然而，此結果仍須進一步的確定。
並列摘要
Multivariate morphometric variation was used to elucidate the stock structure of the redscad(Decapterus kurroides)off Taiwan.A total of seven samples from the northeastern(Keelung and Nanfangao)and southwestern(Kaohsiung and Tungkang)Taiwan werecollected during spawning and non-spawning seasons.Nineteen characters for eachindividual were size-standardized by multiple group principal component analysis(MGPCA).The adjusted measurements were used to construct the dendrogram of sevensamples by unweighted pair-group method with arithmetic means(UPGMA)method usingManhattan distance values.A randomization test was used to examine the significance ofthe morphometric difference between each pair of groups derived from the cluster analysis.The results obtained from cluster analyses and randomization tests indicate(1)that themorphology of red scad is significantly different between spawning and non-spawningseasons and(2)that the morphometric difference between populations from northeasternand southwestern Taiwan is significant without respect to spawning or non-spawningseasons.There appear to be at least two morphologically distinguishable stocks of thisspecies off Taiwan,but further verification of the stock structure may be essential.