NOPR Collection:

Seasonal variations of some heavy metals in bogue (boops boops l.) inhabiting Antalya bay- Mediterrenean sea, Turkey

2014-02-01T00:00:00Z

Title: Seasonal variations of some heavy metals in bogue (boops boops l.) inhabiting Antalya bay- Mediterrenean sea, Turkey Authors: Tekyn-Ozan, Selda Abstract: Seasonal accumulation of heavy metals were determined in bogue (Boops boops) collected monthly from Antalya Bay by using for ICP-AES Vista. Two standard material DORM-3 and DOLT-4 were analyzed for each ten elements. Analysis of these reference materials showed good accuracy. Cd, Cu, Fe, Ni, Se and Zn were determined in all tissues in all seasons, but other metals in tissues were below detection limit in some tissues. Fe was the highest metal in tissues while the lowest was was Cd. Highest of heavy metals were found in the liver while the lowest concentrations were found in muscle and gill. Level of metals shows differences among seasons. Metal levels were highest duirng spring. Positive and negative relationships were found between metal levels and fish size. Metal concentrations in the muscle of examined fish were compared with Turkish Food Codex, World Health organization and EC standarts. Page(s): 198-207

Quantitative distribution of meiobenthos in the Gulf of Martaban, Myanmar Coast, north-east Andaman Sea

2014-02-01T00:00:00Z

Title: Quantitative distribution of meiobenthos in the Gulf of Martaban, Myanmar Coast, north-east Andaman Sea Authors: Ansari, Z. A.; Mehta, Pratik; Furtado, Ramila; Aung, Cherry; Pandiyarajan, R. S. Abstract: Quantitative distribution of meiofauna in the depth range 20 to 1000 m of the Gulf of Martaban, Andaman Sea was studied from 46 stations during a synaptic survey carried out in April-May 2002 of ORV Sagar Kanya Cruise SK175. Fauna was dominated by three taxa: free living nematodes (80%) benthic copepods (5.9%) and foraminiferans (2.8%). Other groups together contributed more than copepods in total abundance. Total density ranged between 40 and 612/10 cm² and dry weight biomass from 0.21 to 0.428 mg/10 cm² in different sediment type and depth zone. Numerical abundance of meiofauna was high in fine silty clay and low in sandy bottom. Formation of three main clusters suggests the influence of dominant sediment texture of clayey sand sand silt clay, silty-clay clayey-silt, and sandy substratum. Fauna was contagiously distributed except at few stations where the distribution was regular. Meiofauna of the present study were similar to those of Andaman Sea and Bay of Bengal and the density changes appears to be related to hydrographic condition and sediment characteristics of the region. Page(s): 189-197

Geochemical evaluation of sea surface sediments along the continental shelf, south east coast of India

2014-02-01T00:00:00Z

Title: Geochemical evaluation of sea surface sediments along the continental shelf, south east coast of India Authors: Nisha, V; Achyuthan, H Abstract: Present study consists geochemical variations and spatial distribution of trace elements (Fe, Mn, Cr, Co, Cu, Ni, Pb and Zn) of the ocean floor sediments collected along the continental shelf off East coast Tamil Nadu (Chennai to Velanganni) during the 2009 southwest monsoon period. Results indicate sand dominance with abundant calcareous debris and shell fragments. Normalisation of trace metals with Al signifies a geogenic sediment origin. Enrichment factor (EF) of trace metals namely Co, Cr, Cu, Ni, Pb, Mn and Zn exhibit an increasing trend Pb>Cr>Co>Zn>Ni>Cu>Mn indicating high values of Pb, Cr, Co and Zn due to the anthropogenic source. However, contamination factor (CF) and pollution load index (PLI) point less than 1 indicating negligible contamination during the 2009 southwest monsoon period. Page(s): 241-251

Distributional characteristics of surface-layer mesozooplankton in the Bay of Bengal during the 2005 winter monsoon

2014-02-01T00:00:00Z

Title: Distributional characteristics of surface-layer mesozooplankton in the Bay of Bengal during the 2005 winter monsoon Authors: Fernandes, Veronica; Ramaiah, N. Abstract: Present study consists spatial patterns in biomass, abundance and composition of mesozooplankton in Bay of Bengal. Surface samples were collected from a central open ocean transect along 88ºE and western coastal transect during the 2005 winter monsoon. During the sampling period, both sea level- and sea surface temperature anomalies inferred from satellite imagery were the lowest at the southern stations of the western Bay transect. These anomalies coincided with the highest biomass and abundance of zooplankton, of copepods in particular. Western region was richer in biomass and abundance compared to the central waters. Zooplankton community comprised 28 taxonomic groups. Predominant copepod community exhibited low species richness with just 46 identified species. They were evenly distributed over stations and their diversity did not vary much between oceanic and coastal transects. Copepod Undinula vulgaris was common in the oceanic waters and Temora stylifera in the coastal. This study highlights the occurrence of pockets of dense zooplankton biomass in the moderately productive (primary) bay. Page(s): 176-188