Fisheries Science 

Pearl oyster 

It is recommended for agriculturist that for healthy culture of Pearl Oyster (Pinctada fucata ) with 100 per cent survival rate in captivity; 35 ppt salinity and feeding rate of 40 crore cells of Chaetocerose Spp. per animal per day is desirable. 

Surumi and surumi products

 Recommendation is made for entrepreneurs that in order to make quality surumi and surumi products from Otolithus rubber (Dhoma), the fish should be used with extra defating process especially during March - April and September - October.

Breeding season of Mugil seheli

It  is  recommended  to  fisherman and scientific  community  that  gravid  female  (length  : 375 mm & above )  and  male ( length : 341 mm & above )  of  Mugil  seheli  are  available  in  coastal  seawater of  Okha-Mandal  region during  its  major  breeding  season late  August  to  September  and  minor  breeding  season  February.  To  maintain  the  population  of  Mugil  seheli  in  coastal  seawater  of  Okha-Mandal  region,  fishermen  should  not  catch  the fish  during  these  periods.                       

Fish drying

For  faster drying  and better  nutritional  values  of dried  fish  ( particularly to get lower  acid insoluble ash),  drying  of fish in  solar  dryer is advisable  as compared to sun drying.

Oyster larvae feed 

It is advisable  to keep  25  ppt  water  salinity  and  3000  lux  of  light  intensity for  getting  speedy multiplication  of  cells  of  Isochrysis  galbana - the live  feed for  Oyster larvae.                                            

Mullet fish culture

 Pod powder @ 20  % alongwith fish meal - 10  %, soyabean meal – 40  %, wheat bran – 15  % and cotton seed oil cake - 15  % in pelleted feed for higher production as well as greater survival rate in mullet fish culture.

Shrimp

It is recommeded to incorporate probiotics (Lactobacillus acidophilus) @ 20 per cent in feed during culture of shrimp for higher production. 

Microbial population in water at fish landing centre of Veraval

Fishermen of Veraval coast are advised not to use sea water of the coast for washing/cleaning of fish catch as the sea water of Market hall, Jetty and Diwadandi areas contains pathogenic bacteria beyond permissible limit (>20 E. coli /ml).