Population Genetic Structure of Marine Leech, in Indo-West Pacific Region.

Grouper aquaculture is rapidly expanding in both tropical and subtropical regions. The presence of marine leeches (; previously named ) infesting cultured groupers, however, can have a fatal effect on grouper aquaculture production and cause significant economic loss. Understanding the marine leech's population structure is therefore important to determine its possible distributional origin and distributional mechanisms, which will help monitor and mitigate the infestation.

Immune Regulation, but Not Antibacterial Activity, Is a Crucial Function of Hepcidins in Resistance against Pathogenic Bacteria in Nile Tilapia ( Linn.).

In this study, the functions of a recombinant propeptide (rPro-Hep1) and the synthetic FITC-labelled mature peptides sMat-Hep1 and sMat-Hep2 were analyzed. Moreover, sMat-Hep1 and sMat-Hep2 were mildly detected in the lymphocytes of peripheral blood mononuclear cells (PBMCs) and strongly detected in head kidney macrophages. The in vitro binding and antibacterial activities of these peptides were slightly effective against several pathogenic bacteria.

Prevalence, intensity and histopathology of Zeylanicobdella arugamensis infestation on groupers reared on different aquaculture systems.

The marine leech, Zeylanicobdella arugamensis, is a major threat to aquaculture in grouper-producing countries including Indonesia. This study aimed at investigating prevalence, intensity and histopathology of the ectoparasite in humpback and hybrid groupers cultured in different rearing systems. A total of 260 groupers (60 humpback groupers and 200 hybrid groupers) were used for samples.

Cyst viability and stress tolerance upon heat shock protein 70 knockdown in the brine shrimp Artemia franciscana.

Females of the brine shrimp Artemia franciscana produce either free-swimming nauplii via ovoviviparous pathway of reproduction or encysted embryos, known as cysts, via oviparous pathway, in which biological processes are arrested. While previous study has shown a crucial role of ATP-dependent molecular chaperone, heat shock protein 70 (Hsp70) in protecting A. franciscana nauplii against various abiotic and abiotic stressors, the function of this protein in diapausing embryos and cyst development, however, remains unknown.