x
uploads/cons.jpg

copepoda n.〔pl.〕【動物;動物學】橈腳亞綱。

coper

The main feed at this time consists of brine shrimp larvae , oyster eggs and diatoms spiruline , skeletonema costatum . however other zooplankton such as copepoda and rotifera can also be used . during the mysis stage the bodies of the fry become larger and so are able to ingest the nauplii of the brine shrimp along with spirulina and 糠蝦期幼蟲個體較大,已能攝食豐年蝦無節幼蟲,拌用螺旋藻,蝦苗丹喂飼,其存活率有意想不到的好,將螺旋藻與豐年蝦無節幼蟲,蝦苗丹等配合一起喂飼,其存活率高的原因,在于豐年蝦無節幼蟲亦能攝食螺旋藻蝦苗丹,可增加豐年蝦無節幼蟲的存活率,不僅能節省豐年蝦外,又能避免水質惡化不需要常換水。

After molting three times , the zoea enter the mysis stage during which they begin to look more like adult shrimp and swim in a characteristic fashion with head and tail pointed downwards at right angles and occasionally performing a sudden retrograde jumping action . this is known as the inversion state , the fry being suspended upside - down in the upper middle region of the pond water . this is , therefore , also called the “ inverted suspension phase “ 眼幼蟲脫第三次即進入糠蝦期幼蟲期mysis stage ,此期之體形已略成蝦之狀態,且具特有之游泳姿態,即頭部及尾部均向下,成一直角彎曲而時作向后跳躍游動,又因成倒立狀態,懸浮于水中的中上層,又叫倒吊期,此期幼蟲對外界的環境因素,如水溫鹽分等變化,比前兩期來得更具適應力,主要餌料為豐年蝦brine shrimp的幼蟲,但其他大小略同的動物性浮游生物,如橈腳類copepoda輪蟲類rotifera均可。

From the p1 to p5 phases of this stage , the brine shrimp s larvae and zooplankton such as copepoda should be used as feed 通常p1至p5左右之后期幼蟲,宜用豐年蝦或期他橈腳之類的動物性浮游生物為餌料。