journal6 ›› 2008, Vol. 29 ›› Issue (3): 109-111.

• Biological resources • Previous Articles     Next Articles

Effects of Water Temperature and Body Weight on Ammonia-Nitrogen and Phosphate Excretion of the Fouling Organism:Caprella sp.


  1. (1.Department of Marine Fishery,Ocean University of China,Qingdao 266003,China; 2.Key Laboratory for Sustainable Utilization of Marine Fishery Resource ,Yellow Sea Fisheries Research Institute,Chinese Academy of Fisheries Sciences,Qingdao 266071,China)
  • Online:2008-05-25 Published:2012-05-23

Abstract: Phosphate and ammonia-N metabolism characteristics of the fouling organism,Caprella sp. at different water temperature were studied by indoor experiment.Phosphate excretion rate and ammonia-N excretion rate were 0.019 1W-0.236 81.065T and 0.009 8W-0.077 01.120 1T,respectively.They both increased with water temperature while decreased with wet body weight.Under 10.0 ℃,the phosphate metabolism might be restrained by low temperature.At 15.0 and 20.0 ℃,phosphate excretion rate was 3.566 5 and 4.892 6 μg·g-1·h-1,respectively.Thus,phosphate release rate of fisheries facilities attached by Caprella sp. was estimated as 14 565.17 and 1 635.94 mg·m-2 in the whole summer and autumn.At 0,5.0,10.0,15.0 and 20.0 ℃,the ammonia excretion rate was 0.009 3,0.059 3,1.148 4,2.143 4 and 2.782 7 μg·g-1·h-1,respectively.And 8 283.93 and 1 302.05 mg·m-2 was the ammonia production rate of fisheries facilities in summer and autumn,respectively.

Key words: Caprella sp., ecological effects, metabolism, water temperature, body weight

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