title: Sea lice, Caligus rotundigenitalis infestations and its management in pond cultured pearlspot, Etroplus suratensis in Gujarat: a case study.
abstract: Highly popular and delicious fish of Kerala (India), pearlspot, Etroplus suratensis is known for its ability to tolerate wide range of salinity, omnivorous feeding behavior. Present report documents the occurrence and management of Caligus rotundigenitalis in brackishwater pond meant for culture demonstration of pearlspot in Gujarat, (India). A brackishwater aquaculture pond (1,500 sq m) was stocked with pearlspot fry (2.60 ± 0.83 g; 4.31 ± 0.82 cm) @ 25,000 ha(-1). On the 46th day of culture couple of dead fish were observed which gradually increased to 120 per day by 52nd day. Following the close observation parasitic infestation was noticed on gills cavities ranging from 15 to 20 numbers per fish. These characteristic features confirmed the parasite as C. rotundigenitalis. As a therapeutic measure the infested pond was successfully treated with Butox(®) @ 300 ml/ha (Deltamethrin 12.5 mg) and repeat dose was administered 2 weeks later. The results of the study suggest the possible therapeutic value of Deltamethrin in treatment of caligid infestation in pond cultured pearlspot.
authors.affiliation: Navsari Agriculture University, Navsari, Gujarat India.
authors.forename: Haresh G
authors.initials: HG
authors.lastname: Solanki
authors.affiliation: Aquatic Animal Health Division, Central Institute of Brackishwater Aquaculture (CIBA), ICAR, 75 Santhome High Road, Raja Annamalai Puram, Chennai, 600 028 India.
authors.forename: Prasanna Kumar
authors.initials: PK
authors.lastname: Patil
authors.affiliation: Navsari Agriculture University, Navsari, Gujarat India.
authors.forename: Jesing G
authors.initials: JG
authors.lastname: Vanza
authors.affiliation: Navsari Agriculture University, Navsari, Gujarat India.
authors.forename: Pritesh
authors.initials: P
authors.lastname: Patel
authors.affiliation: Central Marine Fisheries Research Institute, 75 Santhome High Road, Raja Annamalai Puram, Chennai, India.
authors.forename: Satyanarayana
authors.initials: S
authors.lastname: Sethi
authors.affiliation: Aquatic Animal Health Division, Central Institute of Brackishwater Aquaculture (CIBA), ICAR, 75 Santhome High Road, Raja Annamalai Puram, Chennai, 600 028 India.
authors.forename: Chavali
authors.initials: C
authors.lastname: Gopal
keywords: Caligus rotundigenitalis; Etroplus suratensis; Pearlspot; Sea lice