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温度和微藻饵料对强额孔雀水蚤Parvocalanus crassirostris摄食的影响
程浩楠1, 程方平2, 王淑红1
1.集美大学水产学院;2.上海海洋大学海洋生态与环境学院
摘要:
本文研究了不同温度(18、22、26、30℃)、不同种类微藻饵料(球等鞭金藻、牟氏角毛藻、青岛大扁藻)以及不同饵料浓度(0.5、1.0、1.5、2.5、5μgC/ml)对强额孔雀水蚤摄食的影响。结果表明:(1)强额孔雀水蚤的清滤率随温度上升而上升,随食物浓度上升而下降,26-30℃以及饵料浓度为0.5μgC/ml时清滤率较高。(2)滤食率和摄食率随温度上升而上升,摄食球等鞭金藻和牟氏角毛藻时,在26℃时达到最高;摄食青岛大扁藻时,二者随温度升高持续上升。对三种藻的摄食率大小顺序为:青岛大扁藻>球等鞭金藻>牟氏角毛藻;(3)强额孔雀水蚤摄食碳量占体碳比较高,远高于中华哲水蚤、海洋伪镖水蚤等大中型桡足类;(4)强额孔雀水蚤的最适饵料等效球直径约为11.5μm,青岛大扁藻为强额孔雀水蚤较适口的饵料。
关键词:  强额孔雀水蚤  清滤率  滤食率  摄食率  饵料等效球直径
DOI:
分类号:
基金项目:厦门市海洋经济创新发展示范项目(16PZY002SF18)
Effect of temperature and diet on ingestion of calanoid copepods: Parvocalanus crassirostris
Cheng Haonan1, cheng fangping2, wang shuhong1
1.fisheries collega of jimei university;2.School of Marine Ecology and Environment, Shanghai Ocean University
Abstract:
The effects of different temperature(18, 22, 26, 30°C), different food type (Isochrysisi galbana, Chaetoceros muelleri, Platymonas helgolandica), and different food concentrations (0.5, 1.0, 1.5, 2.5, 5.0μgC/ml) on ingestion of Parvocalanus crassirostris were investigated in present experiment. The results showed that: (1) Clearance rates increased with the temperature increasing , but decreased with the increase of food concentration. which have the highest value at 26-30°C when food concentration was 0.5μgC/ml; (2) Grazing rates and ingestion rates increased with temperature increasing when feeding on I. galbana and C. muelleri and reached the highest level at 26℃, while feeding on P. helgolandica they both increased when temperature elevated from 18 to 30°C. 3 algae species was as flowing: P. helgolandica > I. galbana > C. muelleri; (3) P. crassirostris weight-specific ingestion rates of body carbon content day-1 is relatively high, which is more higher than that of large copepods such as Calanus sinicus and Pseudodiaptomus marinus; (4) The optimum food equivalent sphere diameter of P. crassirostris is about 11.5μm, P. helgolandica is a suitable feed when the cell size was considered.
Key words:  Parvocalanus crassirostris  Clearance rate  Grazing rate  Ingestion rate  Optimum food equivalent sphere diameter.
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