Analysis of the Morphometric Characters of the Kuruma Shrimp(Penaeus Japonicus)in the East China Sea and the Taiwan Strait

東海及臺灣海峽產斑節蝦(Penaeus Japonicus)之外部形態分析

曾宗德(Tzong-Der Tzeng) ； 葉顯椏(Shean-Ya Yeh)

《臺灣水產學會刊》 26卷4期 (1999/12) Pp. 203-212

https://doi.org/10.29822/JFST.199912.0003

摘要

本實驗是為了以防止箱網在大浪強流之衝擊下的網具變形，利用在箱網加上穩定索來減低箱網變形率。本實驗中，一個40 cm×40 cm×32 cm之模型傳統箱網、新設計繫留索箱網及穩定式箱網在模型水槽實驗，以四種沉子量分別繫於箱網之底部，在不同的流速及波高運作下觀查網形之變化並計測箱網網內容積之變化。其結果如下；當流速為15cm／sec而無波時，箱網之網內容積率從傳統箱網的31％提升至穩定式箱網之68％。當流強浪大時，箱網之網內容積變形率從傳統箱網的90％降低至穩定式箱網之50％。由於彈性空間之發揮，穩定式箱網有更大之箱網網內容積，當流強浪大時，箱網內飼養之魚類比傳統箱網有更大的生存空間。這實驗結果可促進發展抗浪形箱網以提高魚類養殖生產量。

關鍵字

形質變異 ； 系群結構 ； 直交變值分析法 ； 集群分析法

並列摘要

Experiments were conducted on preventing deformation of net cage from waves andstrong current by reducing the deformation rate through adding the stable rope in the netcage.In this study,a 40 cm×40 cm×32 cm traditional net cage、a new design mooringrope net cage and a stable net cage were used as models in a current-wave water tank.There were 4 kinds of sinker weights fastened at the bottom of the net cage.The shapeand volume of cage were determined and measured under different flow velocity(V)andwave heights(H).The results are as follows:In case of V=15 cm/sec and H=0(waveless condition),we can determine that the relative volume ratio of the traditional net cage(35%)raised to 68% of the stable net cage.The volume deformation ratio of the traditional net cage was 90%,reduced to 50% of astable net cage during against strong waves and current.Due to the elastic space of a stable net cage creates the more inner volume of cage,the fishes reared in the cage had much more survival space then traditional net cageagainst strong waves and current.All this results will be used in the development of ananti-wave net cage for increasing the fish aguaculture production.

並列關鍵字

Morphometric Variation ； Stock Structure ； Canonical Variate Analysis ； Cluster Analysis