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題 名 | Feeding Rhythm of Thornfish, Terapon Jarbua=花身鷄魚(Terapon jarbua)之攝食周期性 |
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作 者 | 陳雪芬; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 19:3 1992.09[民81.09] |
頁 次 | 頁183-190 |
分類號 | 387.105 |
關鍵詞 | 周期性; 花身雞魚; 攝食; 攝食節律性; 弱光攝食者; Feeding rhythm; Thornfish; Dim-light feeder; |
語 文 | 英文(English) |
中文摘要 | 為探討花身雞魚(Terapon jarbua)之攝食節律性(feeding rhythm),本實驗利用日夜不同時段所釣獲野生花身雞魚之胃內容量變化,及記錄在實驗室內三種不同光照周期(自然光、全亮和全暗)下飼育之花身雞魚的攝食量及攝食頻率。野生花身雞魚在自然環境中,其胃容量╱體重比值(SCW/BW)在14:00~00:00期間均低於1%,再在黎明時較高,在06:00~10:00呈現高峰,其比值達5%。室內實驗之結果顯示在自然光照下,日夜攝食率之變動呈現出規則之周期性,且有夜間高而白天低的趨勢;其它兩組光照周期之攝食率則呈則較不規則變動。由上述結果顯示花身雞魚具有夜間活動之攝食周期,且可能屬於嗜弱光之攝食者。 |
英文摘要 | Feeding periodicity of thornfish (Terapon jarbua) was studied in both the field and the laboratory study. The stomach content weights of the wild thornfish were analyzed to evaluate feeding rhythm in nature. The feeding amount and the feeding frequency were studied under three light regimes (natural light, continuous light, and continuous dark) in the laboratory. The ratio of the stomach content weight to the body weight (SCW/BW) of the wild thornfish was less than 1% from noon to midnight (14:00-00:00) and higher during early morning (6:00-10:00) with a peak value around 5%. Fed by buoyant food pellets in the laboratory, the feeding rhythm under the natural light demonstrated a cyclic trend with higher rates in the nighttime and lower in the daytime. Feeding activities became arrhythmic under the other two light regimes. It seems that thornfish is a nocturnal feeder and feeds mainly under dim-light. |
本系統中英文摘要資訊取自各篇刊載內容。