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Physiology, Nutrition & Pathology Division (PNPD)

Research projects: 6 in-house projects, 9 sponsored projects including 2 NATP projects and 1 inter-institutional project (CMFRI-NBFGR)
Research projects for MFSc dissertation/Ph.D thesis work

Expertise Available in the Division
Fish and crustacean nutrition
Feed technology
Feed biotechnology
Veterinary pathology
Organic chemistry
Molecular taxonomy
Genetics & Breeding

In-house Projects in progress
Development of feeds and optimization of feeding regimes for culturable crustaceans, marine finfishes and pearl oysters
Disease investigation in marine fish and shellfish

Ciliate infection in prawn

Protozoan parasite of prawn

White Spot virus
Development of DNA fingerprints and probes for detection of finfish and shellfish pathogens
Population genetic studies in Rastrelliger kanagurta and Sardinella longiceps
Studies on the effect of toxins, pollutants and probiotics on fish health with special reference to immune system

Haemopoietic tissue of prawn

Haemocytes of edible oyster
Extraction and isolation of substances of pharmacological importance from marine organisms.

National Agricultural Technology Project
Sub-project: Nutrition and Pathology in Mariculture (1999-2003).
Sub-project: Spawning and seed production of finfish and shellfish under captive conditions (1999-2003).
NATP-IVLP and ATIC projects (2000-2003).

I.C.A.R. Adhoc schemes
Seed production of spiny lobsters (Panulirus spp) (1998-2001).
Studies on the defense mechanisms and host-pathogen interactions in bacterial and viral diseases on crustaceans and bivalves (1997-2001).
Studies on the disease management in fish/shellfish farming using bio-active substances from marine organisms (1998-2001).
Induction of triploidy in commercially important bivalves (1998-2001).
Studies on the immune response in shrimp Penaeus indicus (2000-2003).
Evaluation of genetic hetergeneity in marine ornamental fishes using molecular genetic markers (2001-2004).
I.C.A.R. Revolving Fund
Commercial pearl culture adopting onshore pearl culture technology (Feeding regimes of larval production on mass scale larval rearing).

Ministry of Environment & Forests-funded project

A view of the mechanized trawl landing centre at Rameswaram
Impact of bottom trawling on the ecology of fishing grounds and living resources of the Palk Bay and Gulf of Mannar

Research achievements in Nutrition
Developed several flexible feed formulae for fish and shellfish
Low-cost shrimp feed production technolgy (MAHIMA)
Solid-state fermentation technology for low-quality ingradients
Diets for Indian white prawn, mullets, milkfish, grouper and mud crab
Eco-friendly feed management practices
Various steps involved in solid state fermentation

Research achievements in Pathology
Characterization of immune systems
Characterization of defense mechanisms and host-pathogen reactions
Farm advisory service disease diagnostic services, prophylactic and management measures


Shellfish defense cell

Prawn blood cell

Research achievements in Genetics & Biotechnolgy
Triploid edible oysters
DNA fingerprint patterns of fish pathogens
Molecular diagnostics
Genetic characterization of Indian mackerel and oil sardine

Mt DNA of oil sardine

RAPD markers in mackerel

AFLP polymorphisms

Research achievements in physiology

Spermatozoa of mullet
Hormonal sex-reversal in groupers
Ovarian development in Indian white prawn using 5-hydroxytryptamine
Ultra-structure of reproductive and endocrine systems of shrimps and fish

S.No Name Designation Area of work
1 Dr.R.Paul Raj Principal Scientist & Head of Division Fish & Shellfish nutrition
2 Dr.P.C.Thomas Principal Scientist Genetics
3 Dr.K.C.George Principal Scientist Immunology
4 Dr.D.Noble Senior Scientist Physiology
5 Dr.P.Jayasankar Senior Scientist Genetics
6 Mr.N.K.Sanal Scientist (SS) Parasitology
7 Dr.K.S.Shobana Scientist (SS) Pathology
8 Dr.Imelda Joseph Scientist Nutrition