Morphological Observations on Larval Development of Palaemon(Palaemon)Ortmanni(Crustacea: Decapoda: Palaemonidae)

敖氏長臂蝦之幼苗變態研究

鄒月娥(Yueh-Er Tsou) ； 施志昀(Jhy-Yun Shy) ； 游祥平(Hsiang-Ping Yu)

《臺灣水產學會刊》 16卷4期 (1989/12) Pp. 247-260

https://doi.org/10.29822/JFST.198912.0004

摘要

將不同時期之斑節蝦蝦苗於33ppt鹽度，pH 8.10及水溫30℃下以靜止換水方式(staticrenewal method)暴露於不同氨濃度中。對於N3（第3期無期幼蟲），Z2（第2期眼幼蟲），M2（第2期糠蝦苗），PL2（第2期後期幼蟲），PL12（第12期後期幼蟲）之24小時LC50（半致死濃度）分別爲20.88，15.44，17.31，31.68，53.37 mg/L氨-氮及1.31，0.97，1.08，1.98，3.34 mg/L未解離氨-氮。對於Z2，M2，PL2，PLl2，48小時LC50分別爲7.57，15.20，23.80，33.85 mg/L氨-氮及0.47，0.95，1.49，2.12 mg/L未解離氨-氮。LC50隨著暴露時間增長而減小。對於PL2及PL12之「閾值時間」均在108小時。對於PL2之“incipient LC50”爲7.80 mg/L氨-氮，0.49 mg/L未解離氨-氮。對於PL12之“incipient LC50”爲28.29 mg/L氨-氮，1.77 mg/L未解離氨-氮。在所有檢試之斑節蝦蝦苗中，眼幼蟲之抵抗力最弱，PL12之抵抗力最强。0.78 mg/L氨-氮，0.05 mg/L未解離氨-氮以及2.83 mg/L氨-氮，0.18 mg/L未解離氨-氮分別爲繁殖場與育苗場培育斑節蝦蝦苗之安全基準。

關鍵字

敖氏長臂蝦 ； 變態 ； 普通型 ； 太平長臂蝦 ； 巨指長臂蝦 ； 東方長臂蝦

並列摘要

Larvae of Penaeus japonicus at various stages were exposed by static renewalmethod to different concentrations of ammonia(NH3+NH4(superscript +))in seawaterat 33ppt,pH at 8.10 and temperature at 30℃.The 24-h LC50 values of ammoniafor nauplius third substage(N3),zoea second substage(Z2),mysis secondsubstage(M2),postlarva second substage(PL2)and postlarva twelfth substage(PL12)were 20.88,15.54,17.31,31.68 and 53.37 mg/L ammonia-N(un-ionized plusionized ammonia as nitrogen)and 1.31,0.97,1.08,1.98 and 3.34mg/L NH3-N(un-ionized ammonia as nitrogen),respectively.The 48-h LC50 values of ammonia for Z2,M2,PL2,PL12 were 7.57,15.20,23.80,33.85 mg/L ammonia-N and0.47,0.95,1.49,2.12 mg/L NH3-N.The LC50 values of ammonia-N and NH3-Ndecreased with longer exposure.The”threshold time”was 108h for PL2 andPL12.The”incipient LC50”was 7.80 mg/L ammonia-N and 0.49 mg/L NH3-N forPL2,and 28.29mg/L ammonia-N and 1.77mg/L NH3-N for PL12.Amongthe develop mental stages of P.japonicus larvae tested,zoea was the lowesttolerant and PL12 the highest tolerant.Safe values of ammonia was 0.78 mg/Lammonia-N(0.05 mg/L NH3-N),and 2.83mg/L ammonia-N(0.18mg/L NH3-N)for rearing P.japonicus in the hatchery,and in the nursery,respectively.

並列關鍵字

Palaemon Ortmanni ； Metamorphosis ； Common Type ； P. Pacificus ； P. Macrodactylus ； P. Orientis