Reappearance of the rare Shingle Urchin Colobocentrotus (Podophora) atratus (Camarodonta: Echinometridae) after eight decades from the rocky shore of Kodiyaghat (Port Blair), South Andaman Islands, India
نویسندگان
چکیده
منابع مشابه
Microstructure and Micromechanics of the Sea Urchin, Colobocentrotus atratus
The purpose of this research is to study the porous microstructure and the micromechanics of the exoskeletal armor of the helmet urchin, Colobocentrotus atratus. Its unusual reduction in spines forms a smooth tiling of millimeter-sized, flattened polygonal protective aboral spines. Each aboral spine articulates with the underlying test via a ball-and-socket joint and the microstructure of each ...
متن کاملSpatial Variation of Hydrochemical Characteristics in and Around Port Blair Bay Andaman and Nicobar Islands, India
Spatial distributions of hydrochemical characteristics were studied during three seasons of 2007 in Port Blair Bay andaman and Nicobar Islands, India. Nutrients (NO -N, NO -N, NH -N, PO -P, SiO -Si) in relation 2 3 4 4 4 to some physicochemical features (pH, DO, BOD, Salinity, SSC) and biological parameters like pigment concentration, zooplankton biomass and net primary productivity was studied...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
distribution and diversity of macrofoulers in the coastal areas of port blair, andaman and nicobar islands
flora and fauna of rocky coastal habitats are versatile in adapting to the prevalent tidal fluctuations. the current study was undertaken to evaluate the diversity of fouling and associated species around the port blair coastal areas of andaman and nicobar islands. except tss, the hydrographical parameters (temperature, salinity, ph and dissolved oxygen) did not significantly vary among the 5 s...
متن کاملAbundance, species composition of microzooplankton from the coastal waters of Port Blair, South Andaman Island
UNLABELLED BACKGROUND Microzooplankton consisting of protists and metazoa <200 μm. It displays unique feeding mechanisms and behaviours that allow them to graze cells up to five times their own volume. They can grow at rates which equal or exceed prey growth and can serve as a viable food source for metazoans. Moreover, they are individually inconspicuous, their recognition as significant co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Threatened Taxa
سال: 2016
ISSN: 0974-7907,0974-7893
DOI: 10.11609/jott.2406.8.11.9377-9380