Parasitic infection of black tiger shrimp (Penaeus monodon Fabricius) in a Bulacan farm

Date of Publication

2003

Document Type

Master's Thesis

Degree Name

Master of Science in Biology

College

College of Science

Department/Unit

Biology

Thesis Adviser

Jose Santos R. Carandang VI

Defense Panel Chair

Reynaldo M. De La Paz

Defense Panel Member

Juan D. Albaladejo
Mary Jane Cruz Flores

Abstract/Summary

Parasitic infection in pond-reared Penaeus monodon from a commercial farm in Hagonoy, Bulacan, is investigated. Bacterial infection was observed in the hepatopancreas. Luminescent yellow and green colonies of Vibrio harveyi could be isolated from this organ in shrimps taken from ponds with bacterial infection. Monodon baculovirus (MBV) occlusion bodies were also seen in the hepatopancreas. In some cases dual bacterial and MBV infections were evident. MBV did not cause inflammation of the hepatopancreas. The white spot syndrome virus (WSSV) was isolated from the gills and detected by polymerase chain reaction from shrimps taken from four ponds. Possible source of MBV and WSSV introduction into the ponds was discussed. Other parasites seen by histopathology included the midgut-infecting gregarine. Cephalolobus and the gill-fouling ciliates Zoothamnium and Lagenophrys, the latter being reported here for the first time from the Philippines. Probable cause of shrimp mortality was, however, implicated due to luminous vibriosis and WSSV infection. Suggestions to prevent or minimize bacterial and viral infections in the grow-out were presented.

Abstract Format

html

Language

English

Format

Print

Accession Number

TG03769

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

108 numb. leaves ; 28 cm.

Keywords

Shrimps; Parasites; Bacterial diseases; Seafood--Microbiology

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