蟳苗人工培育之研究Ⅱ.輪蟲及豐年蝦無節幼蟲在蟳苗培育上之餌料價值

Studies on the Larval Rearing of Serrated Crab, Scylla serrata Ⅱ. The Food Value of Rotifer, Brachionus Sp., and Artemia Nauplii in the Rearing of Zoeae

鄭金華(Jin-Hua Cheng) ； 陳弘成(Hon-Cheng Chen)

《臺灣水產學會刊》 12卷2期 (1985/12) Pp. 78-86

https://doi.org/10.29822/JFST.198512.0007

摘要

選用輪蟲及豐年蝦無節幼蟲，以多種投餌方式，從事蟳苗培育試驗，以探求輪蟲及豐年蝦在蟳苗培育上之餌料價值，所得結果如下：單以輪蟲餵飼蟳苗，以密度25隻／cc效果最佳；雖然蟳苗在前期活存率很高，但是都無法完成變態。單以豐年蝦餵飼蟳苗，則以密度10隻／cc效果最佳；雖然蟳苗在前期死亡很多，但是部分可以達到變態。以輪蟲餵飼蟳苗而在10天以內開始添加豐年蝦，均可提高蟳苗的活存率，並且愈早開始添加豐年蝦，蟳苗之活存率也愈高；但是，在14天以後才開始添加豐年蝦，則已無法使蟳苗完成變態。以豐年蝦餵飼蟳苗，另在前三天添加輪蟲，能使蟳苗之活存率顯著提高；另在前6天添加輪蟲，能使蟳苗的活存率達到最高。繼續添加輪蟲並不能使蟳苗的活存率再度提高。將輪蟲及豐年蝦適當地混合餵飼蟳苗，到達變態前之活存率一般在60%以上，最高可達83.3%。延遲投餌對蟳苗活存有很大的影響；延遲1天以上就使蟳苗活存率顯著地降低，延遲4天以上蟳苗就無法繼續生存。延遲投餌並使蟳苗到達變態的時間延後。

並列摘要

Two diets, rotifer, Brachionus sp., and Artemia nauplii were tested on zoeae of Scylla serrata and the following results were obtained.
The survival rate of early zoeal stages was high when fed only with rotifer, especially at a density of 25 no./cc, but the larvae could not reach megalopa stage. For zoea fed only with Artemia nauplii, mass mortality were obtained in early zoeal stages, but successful and complete metamorphosis did occur in some zoeae.
Zoeal metamorphosis to megalopa stage was possible for zoea fed with rotifer and then Artemia nauplii added as supplement within 10 days after hatching. However, none of the zoea could complete metamorphosis when the addition of Artemia nauplii was delayed over 14 days.
For zoea fed with Artemia nauplii, addition of rotifer within the first few days after hatching increased their survival. The survival rate was highest if rotifer was added within the first 6 days. The survival rate of zoea reared with diets of suitable mixing was 60-83.3% before 1st metamorphosis.
The survival of zoeae was significantly related to time of feeding after hatching. Survival decreased as zoeae were not fed on the 1st day. All zoeae died within a few days if not fed over 4 days after hatching. Delay in feeding also prolonged the development of zoea, especially at the 1st zoea instar.