Infection analysis of Rhadinorhynchus bicircumspinis in barramundi (Lates calcarifer) from pond and floating net cage in Situbondo waters.

Barramundi (Lates calcarifer) was known as highly demand of fisheries commodity and exported in many countries. Pond and floating net cage culture of barramundi have several problems that cause many mortality in fish, such as endoparasite infection. This study aims to determine and to count the prevalence and intensity of endoparasite Rhadinorhynchus bicircumspinis in barramundi (L. calcarifer) from pond and floating net cage in Situbondo waters. Sixty samples of barramundi with length 18.18 ± 1.41 cm were taken from ponds and floating net cages and examined for endoparasite from digestive track, liver, gonad and kidney. The result showed endoparasite R. bicircumspinis was found from digestive track with prevalence was 10% and 40% in pond and floating net cage, respectively. The intensity of endoparasite R. bicircumspinis was 1 and 2.5 in pond and net cage, respectively. Further studies were needed to examined the histopathological damage caused by R. bicircumspinis infection.