本研究以生殖生物學比較長硨磲貝(Tridacna maxima) 與諾亞硨磲貝(Tridacna noae)之差異。實驗於2013 年3 月至2014 年6 月在東沙和墾丁海域進行，結果顯示墾丁以及東沙長硨磲貝生殖高峰分別為5 月~ 8 月及3 月~ 6 月，而諾亞硨磲貝則為5 月~ 7 月和4 月~ 6 月間。胚胎發育比較結果顯示長硨磲貝、諾亞硨磲貝與兩者之雜交皆成功受精，但雜交種發育二天後全數死亡，而長硨磲貝與諾
亞硨磲貝自浮游期至著苗前各階段平均殼長均無顯著差異。以三個月大之諾亞硨磲貝稚貝進行澎湖及林邊兩地的成長比較，結果顯示澎湖之成長率為0.06 mm/day，林邊為0.19 mm /day。在林邊，不同水溫下，比較諾亞硨磲貝及長硨磲貝稚貝的成長，結果顯示低溫下(24℃)這兩種硨磲貝的成長緩慢，在高水溫下(27~29℃)成長較快；且兩者成長方程式之斜率無顯著差異，表示這兩種硨磲貝的成長速率相似。比較硨磲貝稚貝外部形態之差異，結果為長硨磲貝稚貝標準化後的殼底及殼鱗寬度明顯大於諾亞硨磲貝。本生殖生物學的研究結果亦證實長硨磲貝與諾亞硨磲貝是不同物種。

The aim of this study was to compare the reproductive biology of the giant clams
Tridacna maxima and Tridacna noae. Field monitoring in the changes of egg diameter was conducted in Kenting and Donsha during the period of March 2013 - July 2014. The spawning peak of T. maxima was from May to August in Kenting,
and March to June in Dongsha. In T. noae, it was through May to July in Kenting, and April to June in Dongsha. Artificial fertilization was successfully conducted in T. maxima, T. noae and the hybrid. However, the death of hybrids occurred two days after fertilization. And, there was no significant difference in shell length between
the larvae of T. maxima and T. noae before settlement. The growth of 3-month old juveniles was 0.06 mm/day in Penghu and 0.19 mm/day in Linbian. Both species grew faster in higher temperature (27~29℃) than the lower one (24℃). And, there was no significant difference in slopes of the length-weight regression between the
two species. Besides, it was found that the standardized shell-base width and scute width were greater in T. maxima than that of T. noae. As a whole, the present study also indicates that T. maxima and T. noae are different species.

目錄
中文摘要……………………………………………………………………… i
英文摘要……………………………………………………………………… ii
目錄…………………………………………………………………………… iii
圖目錄…………………………………………………………………………iv
表目錄…………………………………………………………………………v
附錄…………………………………………………………………………vi
壹、前言…………………………………………………………………… 1
貳、研究材料與方法……………………………………………………… 3
參、結果…………………………………………………………………… 7
肆、討論………………………………………………………………… 11
伍、結論…………………………………………………………………… 16
參考文獻……………………………………………………………….…… 16
附圖………………………………………………………………………… 22
附表………………………………………………………………………… 37
附錄………………………………………………………………………… 39

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