The correlation between temperature and intensity of Zeylanicobdella arugamensis on cantang grouper (E. fuscoguttatus E. lanceolatus) from traditional ponds in the Kampung Kerapu Lamongan East Java Indonesia

Grouper fish (Epinephelus sp.) is one of the superior species in the development of marine culture in Indonesia. In the cultivation process, one important factor that must be considered is good water quality. Diseases that attack fish are caused by the interaction between environment, pathogen, and host. One of the pathogenic agents is parasites, and the ectoparasite that infects cantang grouper is Zeylanicobdella arugamensis. This study aims to determine the correlation between temperature and intensity of Zeylanicobdella arugamensis in cantang grouper. The method used in this research is a survey method by measuring pond temperature and calculating the intensity of Zeylanicobdella arugamensis from 50 samples of cantang grouper in cantang grouper at 4 ponds. The results that have been obtained are, temperature: 28 C (pond 1), 29 C (pond 2), 30 C (pond 3), and 31 C (pond 4). While the intensity of Zeylanicobdella arugamensis found were: 18,66 individu / fish (pond 1), 10,7 individu / fish (pond 2), 7,1 individu / fish (pond 3), and 4,6 individu / fish (pond 4). Results of the correlation analysis showed a very close relationship between temperature and the intensity of Zeylanicobdella arugamensis in cantang grouper with negative correlation coefficient value is r = -0.964 (p <0.05).