NOPR Collection:

Invertebrate shells as pollution bio-indicators, Gebel El-Zeit area, Gulf of Suez,Egypt

Fri, 01 Aug 2014 00:00:00 GMT

Title: Invertebrate shells as pollution bio-indicators, Gebel El-Zeit area, Gulf of Suez,Egypt Authors: Youssef, Mohamed; El-Sorogy, Abdelbaset; El-Sabrouty, Mohamed; Al-Otaibi, Naif Abstract: Sixteen well preserved Pelecypod and gastropod shells were analyzed for their Mn, Ni, Co, Cu, Zn and Pb content. Eight shells are belonging to the Pleistocene of Gebel El-Zeit and eight recent shells were collected from El-Zeit Bay. Average metal accumulation levels in Pleistocene shell of the study area is in the following order Mn< Ni < Cu < Co < Zn < Pb, while in the Recent shell are in the following order Mn< Ni < Co < Zn < Cu < Pb. This is due to the human activities such as: shipping, the oil pollution resulted from the oil industries, where Gabal El Zeit area is one of the important areas of oil exploration in Egypt. Natural sources of heavy metals include: terrigenous inputs from wadis during flash floods that transport terrestrial material into the sea. Page(s): 1465-1474

Seasonal variations in the culturable diversity and population density of the total heterotrophic and pathogenic bacteria, in the coastal waters of the Andaman Sea, India

Fri, 01 Aug 2014 00:00:00 GMT

Title: Seasonal variations in the culturable diversity and population density of the total heterotrophic and pathogenic bacteria, in the coastal waters of the Andaman Sea, India Authors: Gobalakrishnan, Rajagopal; Aarthi, Chandramohan; Kamala, Kannan; Sivakumar, Kannan; Kannan, Lakshmanan Abstract: Present study examined the seasonal variations of total heterotrophic and pathogenic bacterial diversity of the coastal waters of the Andaman Sea in the Havelock island. In the non-moonson season, 22 strains of total hetrotrophic bacteria (THB) belonging to 8 genera, were isolated from water. Escherichia (23%) was dominant, followed by Pseudomonas (18%), Vibrio (14%), Enterococcus (14%), Salmonella (9%), Aeromonas (9%), Klebsiella (9%) and Cornebacterium (4%). In the monsoon season, 29 strains of THB belonging to 12 genera, were isolated. Vibrio (14%), Micrococcus (14%) and Klebsiella (14%) were dominant and contributed equally to the percent composition followed by Escherichia (10%), Streptococcus(10%), Enterococcus (10%), Pseudomonas (7%), Aeromonas (7%), Salmonella (4%), Shigella (4%), Flavobacterium (3%) and Staphylococcus (3%). Population density of THB varied from 43 X10⁵ CFU mL^-1 to 182 X10⁵ CFU mL^-1 in the non-monsoon season. In the monsoon season, it varied from 93 X10⁵ CFU mL^-1 to 365 X10⁵ CFU mL^-1. In the monsoon, THB diversity including pathogens was higher as monsoon would provide with a favourable microenvironment for the higher growth of THB and pathogenic bacteria. Page(s): 1600-1607

Incidence of Brown-gill (fungal) disease in three Penaeus species grow out ponds of Vellapallam, Nagapattinam district of Tamil Nadu, India

Fri, 01 Aug 2014 00:00:00 GMT

Title: Incidence of Brown-gill (fungal) disease in three Penaeus species grow out ponds of Vellapallam, Nagapattinam district of Tamil Nadu, India Authors: Karthikeyan, V; Gnanamoorthy, P; Gopalakrishnan, A Abstract: Genus Penaeus are the most common shrimp species cultured in India with very susceptible to microbial diseases. Mycofloral brown-gill disease was identified from P. monodon, P. indicus and P. vannamei in shrimp pond. A totally 6 genera of 20 species from 427 colonies were isolated from the samples. Maximum growth of colonies was occurred at 80^th day of sampling. Microscopical and pathological studies revealed that the fungal infection on gill. Present investigation revealed the poor water quality conditions are a budding problem and due to this factor diseased shrimps are to be frail for consumption. Page(s): 1594-1599

Seasonal variations in meat yield and body indices of three estuarine clam species (Bivalvia: Veneridae)

Fri, 01 Aug 2014 00:00:00 GMT

Title: Seasonal variations in meat yield and body indices of three estuarine clam species (Bivalvia: Veneridae) Authors: Lagade, V M; Taware, S S; Muley, D V Abstract: In the present study, meat yield (MY) and body indices like Body Condition Index (BCI), Hepatopancreas Index (HI), Gonadal Index (GI) and shell Component Index (SCI) were studied monthly in three commercially important venerid clams species (M. meretrix, K. opima and P. laterisulca) from Bhatye estuary. Results reveal that the highest meat yield in clams like M. meretrix, K. opima and P. laterisulca was recorded during July, August and September, 2010. Maximum BCI was observed in the months of December, June and September from M. meretrix, K. opima and P. laterisulca respectively. Maximum HI and GI were recorded during April and August in M. meretrix, during July and August in K. opima and during January and June in P. laterisulca. Highest value of SCI was acquired in M. meretrix and P. laterisulca during April, while in K. opima during February. In the present investigation, peak values of meat yield and body condition index were determined as an indicative of nutritive status of the clam species. Hence, greatest availability of nutrients in clams during annual cycle is the most feasibly or ideal period for harvesting commercially important clam species. Page(s): 1586-1593