选用硫酸铜、敌百虫、福尔马林、上野黄药对克氏双锯鱼稚鱼进行急性毒性试验。硫酸铜对克氏双锯鱼稚鱼24 h LC50为0.80 mg/L,48 h LC50为0.70 mg/L,96 h LC50为0.60 mg/L,安全质量浓度为0.16 mg/L;敌百虫对克氏双锯鱼稚鱼24 h LC50为2.8...选用硫酸铜、敌百虫、福尔马林、上野黄药对克氏双锯鱼稚鱼进行急性毒性试验。硫酸铜对克氏双锯鱼稚鱼24 h LC50为0.80 mg/L,48 h LC50为0.70 mg/L,96 h LC50为0.60 mg/L,安全质量浓度为0.16 mg/L;敌百虫对克氏双锯鱼稚鱼24 h LC50为2.88 mg/L,48 h LC50为2.44 mg/L,96 h LC50为2.12 mg/L,安全质量浓度为0.53 mg/L。福尔马林和上野黄药对克氏双锯鱼稚鱼的96 h LC50>100mg/L,属于低毒。根据96 h半致死质量浓度来判断药物的毒性大小,克氏双锯鱼稚鱼对4种药物敏感性依次为:硫酸铜>敌百虫>福尔马林和上野黄药,福尔马林和上野黄药对克氏双锯鱼稚鱼同属于低毒药品。展开更多
Objective:To determine the physiological and ecological responses of marine ornamental fishes to the change of water temperature with its potential effects on the growth,survival and feeding in clown fish.Methods:Thre...Objective:To determine the physiological and ecological responses of marine ornamental fishes to the change of water temperature with its potential effects on the growth,survival and feeding in clown fish.Methods:Three different sea anemone fish(Premnas biaculeatus,Amphiprion clarkii,Amphiprion akallopisos)were reared in confinement at water temperatures of 26,28,30,32,and 34℃using thermostat and they were maintained up to the marketable size,and growth,survival and feeding were evaluated during the experimental period.Results:The results illustrated that water temperature influenced the physiological performance of juveniles of three different sea anemone fish significantly.The growth and survival rates of juveniles of three different clown fish significantly increased with the increase of water temperature from 26℃to 34℃(P<0.05).Water temperature also influenced the feeding of three different clown fish significantly with feed conversion ratio increased from(0.071±0.020),(0.075±0.030)and(0.079±0.028)to(0.057±0.040),(0.047±0.030)and(0.045±0.028)for Premnas biaculeatus,Amphiprion clarkii and Amphiprion akallopisos respectively with increase of water temperature from 26℃to 34℃(P<0.05).Specific growth rates(P<0.05)increased significantly with increase of water temperature and positively correlated with the feed conversion ratio,indicating that growth rates are significantly increased with increase of temperature.Conclusions:This study deliberately reveals that the physiological response of juveniles of clown fish as the change of water temperature and substantiated that water temperature influenced juvenile growth,survival and feeding significantly.This study also put forward that the reduced growth,survival and feeding of juveniles at lower temperature which have ecological impacts on clown fish juveniles in settlement and population replacement in the wild.展开更多
文摘选用硫酸铜、敌百虫、福尔马林、上野黄药对克氏双锯鱼稚鱼进行急性毒性试验。硫酸铜对克氏双锯鱼稚鱼24 h LC50为0.80 mg/L,48 h LC50为0.70 mg/L,96 h LC50为0.60 mg/L,安全质量浓度为0.16 mg/L;敌百虫对克氏双锯鱼稚鱼24 h LC50为2.88 mg/L,48 h LC50为2.44 mg/L,96 h LC50为2.12 mg/L,安全质量浓度为0.53 mg/L。福尔马林和上野黄药对克氏双锯鱼稚鱼的96 h LC50>100mg/L,属于低毒。根据96 h半致死质量浓度来判断药物的毒性大小,克氏双锯鱼稚鱼对4种药物敏感性依次为:硫酸铜>敌百虫>福尔马林和上野黄药,福尔马林和上野黄药对克氏双锯鱼稚鱼同属于低毒药品。
基金Supported by the Director of the Centre and the authorities of Annamalai University for providing with facilities and Center for Marine Living Resource and Ecology(CMLRE-Office Memorandum No:G4/3366/2013),Ministry of Earth Sciences for financial assistant.
文摘Objective:To determine the physiological and ecological responses of marine ornamental fishes to the change of water temperature with its potential effects on the growth,survival and feeding in clown fish.Methods:Three different sea anemone fish(Premnas biaculeatus,Amphiprion clarkii,Amphiprion akallopisos)were reared in confinement at water temperatures of 26,28,30,32,and 34℃using thermostat and they were maintained up to the marketable size,and growth,survival and feeding were evaluated during the experimental period.Results:The results illustrated that water temperature influenced the physiological performance of juveniles of three different sea anemone fish significantly.The growth and survival rates of juveniles of three different clown fish significantly increased with the increase of water temperature from 26℃to 34℃(P<0.05).Water temperature also influenced the feeding of three different clown fish significantly with feed conversion ratio increased from(0.071±0.020),(0.075±0.030)and(0.079±0.028)to(0.057±0.040),(0.047±0.030)and(0.045±0.028)for Premnas biaculeatus,Amphiprion clarkii and Amphiprion akallopisos respectively with increase of water temperature from 26℃to 34℃(P<0.05).Specific growth rates(P<0.05)increased significantly with increase of water temperature and positively correlated with the feed conversion ratio,indicating that growth rates are significantly increased with increase of temperature.Conclusions:This study deliberately reveals that the physiological response of juveniles of clown fish as the change of water temperature and substantiated that water temperature influenced juvenile growth,survival and feeding significantly.This study also put forward that the reduced growth,survival and feeding of juveniles at lower temperature which have ecological impacts on clown fish juveniles in settlement and population replacement in the wild.
