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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50901

Title: Copepod feeding study in the upper layer of the tropical South China Sea
Authors: Tseng, L.-C
H.-U. Dahms
Q.-C. Chen
J.-S. Hwang
Contributors: 國立臺灣海洋大學:生命科學暨生物科技學系
Date: 2009-05
Issue Date: 2018-10-29T08:21:24Z
Publisher: Helgoland Marine Research
Abstract: Abstract: The South China Sea (SCS) is the world’s largest marginal sea being notable for vertical mixing at various scales resulting in a sequence of chemical and biological dynamics in surface waters. We investigated the ingestion, gut content, evacuation and clearance rates of copepods collected from six stations (including a South East Asia Time Series station) along a transect line in the tropical of a SCS cruise during September 27, 1999 to October 2, 1999. The goal of the present study was to understand the feeding ecology of copepods in the upper water layers (0–5m) of the northern SCS during autumn. We measured the gut pigment contents of 33 copepod species by the gut fluorescence method. The gut chlorophyll a values of most small size copepods (<1mm) were lower than 1.00ngChl aindividual−1. The highest gut pigment content was recorded in Scolecithrix danae (7.07ngChl aindividual−1). The gut pigment contents of 33 copepod species (including 70 samples and 1,290 individuals) estimated is negatively correlated with seawater temperature (Pearson correlation r=−0.292, P=0.014) and is positively correlated with the chlorophyll a concentration of ambient waters (Pearson correlation r=0.243, P=0.043). Mean gut pigment content, ingestion and clearance rates (from 80 samples and 1,468 individuals) show that larger copepods (>2mm) had significantly higher values than medium sized copepods (1–2mm) and smaller sized copepods. The present study shows that the performance of feeding on phytoplankton was variable in different sized copepod groups, suggesting that copepods obtained in the tropical area of the southeastern Taiwan Strait might be opportunistic feeders.
Relation: 63(4) pp.327-337
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50901
Appears in Collections:[生命科學暨生物科技學系] 期刊論文

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