The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.
Subject = Biology
Mostrando recursos 1 - 20 de 5,505
Study biological characteristics related with development and reproduction in Barbus capito on the southern coast of the Caspian Sea, Gilan Province - Shajie, Hooman
In the present research, a total of 207 pieces of fish from 25 sampling stations in Gilan Province coasts in the years 2001-2002 were biologically studied in terms of their growth and development, reproduction and feeding. The average length and weight of the fishes are increased, as they get older. The highest index of length and weight growth is observed in the years 1 to 2. As the age increases, gradient of length and weight growth diagrams decrease. In studying the relation between length and weight, it was observed that proportionate to the total length, the weight is increased progressively....
Biodiversity and production of bioactive material from cyanobacteria in Persian Gulf - Emtiazjoo, Mojgan
In this project sampling was done from 9 stations in 3 depths during 5 seasons to separate, identify and examine the biodiversity of cyanobacteria. Another sampling also has been done to analyse all physical and physicochemical parameters, primary production and polluting agents such as heavy metals and oil hydrocarbons in water and sediments. Along with optimization of Oscillatoria to study the ability of producing natural substances, these cyanobacteria were analysed from the point of antimicrobial and mutagenic effects. To examine the relationships among analysed parameters, the regression test, analysis of varian and Post Hoc were used. As the result of...
Liver cytochrome oxidase P4501A1 purification of Acipenser persicus and designing ELISA for measuring - Karimzade, Kataion
Moon oxygenases related to cytochrome P450s are the molecular Biomarkers which have important role in Biotransformation of endogenous and exogenous compounds and catalazyin of many biological reactions. One of the important isoenzyme is cytochrome P4501A. This isoenzyme involved in metabolism of environment pollutnts such as PAHs. Because of its inducibility, it has a key tool for impact assesment of contaminants in aquatic environment. In this study, at first, that fractions containing Acipenser persicus and Huso huso isoenzyme were purified, and after that Antibodies against them were prepared. For isolation of isoenzyme fraction, Microsomes were prepared from fish liver using differential...
Survey of biosystematic and sexual reproductive physiology in Holothuroidea on Hormozgan Province - Tehrani Frad, Akram
Sea cucumbers belong to phylum Echinodermata, order Holothuroidea are an abundant and diverse group of Invertebrates, with over 1400 species occuring from the intertidal to the deepest oceanic trenches. Sea cucumbers are important components of the food chain in temperate and coral reef ecosystems and they play an important role as deposite feeders and suspension feeders. Rapid decline in populations may have serious consequences for the survival of other species that are part of the same complex food web,as the eggs, larve and juveniles constitute an important food source for the other marine species including crustaceans, fish and mollusks. In...
Survey of reproductive physiology on Epinephelus coioides in Khozestan province, Persian Gulf - Abbasi, Fateme
Epinephelus coioides (family serranidae) is protogynous. This species is one of the most important fishes in food chain of marine proteins of persian Gulf. Therefore knowing about the reproductive biology and physiology of this species is an important role on aquaculture procedures. Monthly samples of Epinephelus coioides were obtained in khozestan Bahrekan province from 2001 to 2002 for annual variation of base line of reproductive hormone. The hormones such as: 17-B estradiol, Testosteron, Progesterone, Gonadotropin I ,II GTHI, II) and cortisol have assayed and also different stages of gonads from the histological point of view were studied by light and...
Survey of marine turtles ecobiology in north of Persian Gulf - Saeedpoor, Behzad
Sea turtles are counted as rare and extincting species. During the last century the population of sea turtles are drastically reducd and the remaining ones are considerd either threatend or endangerd because of some factors as sea pollution, economic benefits, intense fishing effort, beach man-made structures and so on. So, in recent years, more attention to conserving and surviving them is assumed. After a preliminary studies on some of the biological specifications in northern beach of Persian Gulf, three islands ; Hormoz, Hengam and Larak for the biometry of the turtles, a total number of 179, from 1999 to 2002...
Population diversity studies of pharaoh cuttlefish (Sepia pharaonis) in the Persian Gulf and the Gulf of Oman - Valinassab, Tooraj
The pharaoh Cuttlefish (Sepia Pharaonis) is the most abundant species in the persian gulf and oman sea. The stock patterns of this species was studied conserning biological, morphological and electrophoretical aspects. In addition to measuring the biological patterns; 21 quantitative and qualitative factors were measured or counted. There tissues namely muscle, eye and liver were also used for further polyacrylamide electrophoresis analysis (SDS-Page method). The densitograms of protein bands of each tissue were prepared by Gel-Scanner and also the amount of bands' areas were estimated. The results of LSD test showed that tentacle length (TL), Tentacle club length (TCL) and...
Investigation on biodiversity and population structure of Penaeus sernisulcatus [sic] in northern waters of Persian Gulf - Matinfar, Abbass
Green tiger prawn, Penaeus sentisulcatus is one of the commercial species of Persian Gulf, which is distributed from north to Strait of I Iormoze. Concerning its role in fisheries economic, various research projects on stock assessment, biology and aquaculture has been conducted. This research is targeted the identification of various populations of green tiger prawn in northern waters of Persian Gulf. The area has been divided to five regions from north to south named; Bahrakan, Boushehr, Tangestan, Motaaf and Strait of Hormoz. In each region, numbers of sampling stations trawled, and live shrimp species carried in containers equipped with air...