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由魚探記錄跡直接推測鮆科稚魚群量之初步研究

Studies on the Estimation of the Biomass of Shirasu(Engraulidae)by Echograms Shown in Echosounder

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摘要


太平長臂蝦是屬於海洋性的長臂蝦類。本研究乃在室內進行其幼苗變態觀察,結果發現本種蝦須經過12期的蚤狀幼體後,才變態爲後期蝦苗,變態所須的時間在水溫爲24~26℃,鹽度33~34‰時,在第25天出現後期蝦苗;而在水溫爲27~28.5℃之下,則在第19天卽出現後期蝦苗。本報告對各期幼苗的形態特徵均加以描述,並繪圖說明。

並列摘要


Palaemon pacificus(Stimpson,1860)is an oceanic palaemonid shrimp.Ahatching and larval development study of this prawn was conducted underlaboratory conditions.Water temperature ranged from 24-26℃ and salinityranged from 33-34‰.Under these conditions,larvae reached the postlarvalstage after 25 days,passing through 12 zoeal stage.Morphological characteristicsare also described and illustrated in detail.

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