The Journal of Marine Biology & Oceanography (JMBO) promotes rigorous research that makes a significant contribution in advancing knowledge for marine sciences. JMBO includes all major themes pertaining to organisms in the ocean or other marine or brackish water bodies.
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Studies on the Diversity and Shallow Waters of Echinoderms from Port Blair Bay, South Andaman Island, India
Echinoderm species diversity in the coastal waters of South Andaman was investigated in ten sites. Totally 89 species of Echinoderms were identified which plunge under five classes of echinoderms such as Holothurioidea, Echinoidea, Ophiuroidea, Asteriodea and Crinoidea belonging to 52 genera, 13 orders and 24 families, which were the most diverse classes. Species richness (S) was generally greater, higher levels were noted in Pongibalu and Chidiyatapu followed by Marina Park, Wandoor and Barmanallah.
Experimental Verification of Drag Forces on Spherical Objects Entering Water
Objects which pass from gas regions to liquid regions experience elevated impact forces associated with the acceleration of the surrounding liquid. In order to investigate these forces, complementary experiments and simulations were performed on a sphere that traveled from air to water with an impact velocity of 2 m/s. It was found that the two methods gave results that were in very good agreement. In particular, the depth vs. time trajectory of the sphere closely matched. A fitted polynomial allowed the entry region acceleration to be extracted.
Bioaccumulation of Cd, Pb and Zn in the Oyster Saccostrea cucullata and Surface Sediments of Hendourabi Island-Persian Gulf, Iran
The concentrations of Cd, Pb and Zn in the shell and soft tissue of the oyster Saccostrea cucullata and surface sediment from the intertidal zones of Hendourabi Island, Persian Gulf, Iran, were studied. The aim of this study was to investigate the relation between concentrations of Cd, Pb and Zn in the shell and soft tissue of the oyster S. cucullata and the respective metal measured in surface sediment. The oyster and surface sediment samples were collected from three stations in June 2011. The mean concentrations of Cd, Pb and Zn in surface sediment were 2.36, 0.02, and 46.4 μg/g dw, respectively. In comparison with mean crust and mean world sediment, the Pb and Zn concentrations were far lower, while the Cd concentration was a lot higher than the mean crust Cd concentration.