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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39635

Title: Changes in Sublethal Effects, Oxygen Consumptin, and Ammonia Excretion of Grey Mullet (Mugil cephalus) Under Various Salinities and Lead Concentrations
烏魚(Mugil cephalus)暴露在不同鹽度及鉛濃度下其半致死效應、耗氧率、及排氨率之變化
Authors: 王河順(He-Shun Wang)
李純慧(Chun-Huei Li)
鄭學淵(Sha-Yen Cheng)
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: Grey mullet;Lead;Lethal effect;Oxygen consumption;Ammonia excretion;Salinity
Date: 2012-09
Issue Date: 2016-12-26T01:38:51Z
Publisher: 臺灣水產學會刊
Abstract: Abstract:The present study investigated the sublethal concentration, sublethal time, oxygen consumption, and ammonia excretion of grey mullet (Mugil cephalus) fry following exposure to different lead concentrations at various salinities (0 1 per mille, 17 1 per mille, and 34 1 per mille). Fish exposed to 17 1 per mille were the most tolerant to lead. Respective 96-h 50% lethal concentration (LC50) values were 1.65, 5.21, and 4.39 mg Pb2+/l following exposure to 0 1 per mille, 17 1 per mille, and 34 1 per mille salinities. Examination of the time to 50% lethality (LT50) also showed the same trend at salinities of 17 1 per mille > 34 1 per mille > 0 1 per mille. Oxygen consumption and ammonia excretion by M. cephalus were measured in individual fish exposed to different salinities (0 1 per mille, 17 1 per mille, and 34 1 per mille) and 0.5 mg/l lead. Oxygen consumption of the fish directly increased with a higher ambient salinity. In control solution, the oxygen consumption of mullet exposed to 0 1 per mille, 17 1 per mille, and 34 1 per mille salinities were 733.97, 801.78, and 890.21 μg/g/ h, respectively. The ammonia excretion of mullet exposed to 0 1 per mille, 17 1 per mille, and 34 1 per mille salinities were 17.792, 11.587, and 10.802 μg/g/h, respectively. In fish exposed to 0.5 mg/l lead and different salinities (0 1 per mille, 17 1 per mille, and 34 1 per mille) for 20 days, oxygen consumption rates respectively decreased to 450.32, 484.57, and 516.27 μg/g/h. Ammonia excretion directly decreased with higher ambient salinities. After 20 days of exposure, respective ammonia excretion rates were 1.134, 0.939, and 0.646 μg/g/h in grey mullet acclimated to 0 1 per mille, 17 1 per mille, and 34 1 per mille salinities.
Relation: 39(3), pp.187-198
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39635
Appears in Collections:[Department of Environmental Biology and Fisheries Science] Periodical Articles

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