Juniper Publishers-Oceanography Open Access Journal

  Juniper Publishers -  Journal of Oceanography Abstract The document briefly reviews the current status of statistical monitoring systems for fisheries and aquaculture. Emphasis is placed on small-scale fisheries and on small/medium water systems for freshwater aquaculture. Important sampling aspects such as determination of safe sample size and frequency of sampling are briefly presented and discussed. Also examined are survey operational aspects such as sustainability of data collection schemes and development/maintenance of databases used for the storage of primary data and the preparation of statistical reports. Keywords:  Statistical surveys; Sampling techniques; Small-scale fisheries; Freshwater aquaculture Go to Introduction Reliable data on fisheries and aquaculture is a key factor for the formulation of policies and management. Knowledge of the status of capture fisheries is a prerequisite for sound policy-development, better decision-making and responsible fish...

  Juniper Publishers -  Journal of Oceanography Abstract Antarctica is one of the most surprising places in terms of biodiversity, and is one of the regions less affected by humans. The study of pollution in Antarctica can help us understand the real influence of human activities on the environmental pollution from polar regions. Trace elements are worrisome to biota for their effects on health and ecosystems. These chemicals enter the water through natural processes and human activities, and can affect wildlife and humans. The northern of Antarctic Peninsula and the South Shetland islands are particularly vulnerable because of their proximity to the continent and for having major human pressure. Our studies have focused on the determination of metals in penguin excreta, as they are non-invasive materials which can be suitable for the monitoring of chemicals in the environment. Go to Introduction Heavy metals (or most recently known as trace elements) are chemicals whose expos...

  Juniper Publishers -  Journal of Oceanography Abstract Many global aquatic ecosystems, particularly for those in high latitudes, are reported to be under pressure due to warming climate and anthropogenic interference. In this short article, we briefly discuss the two major environmental constraints for an aquatic ecosystem-streamflow and stream temperature, which haven't received enough attention thus with only sparsely available concurrent in-situ measurements across the globe. A novel numerical solution, i.e., the Dominant River-Tracing-based streamflow and Temperature (DRTT) model, is introduced, and it has been developed for the simulations of both daily streamflow and temperature along entire drainage networks for large regions, filling the data gap usually faced by aquatic ecologists. The DRTT model has been successfully applied in the study of freshwater salmon habitat and associated productivity in 1500 North Pacific Rim rivers. However, that study also indicated big...

  Juniper Publishers -  Journal of Oceanography Abstract Rare actinomycetes are the genera of actinomycetes other than Streptomycetes found in less expored environment. Some of the actinomycetes genera such as Sinomonas, Nocardia, Micromonospora, Actip lanes, Pseudonocardia, Actinomadura, Micrbobispora are known as the novel species. Rare actinomycetes have been found to produce extremely useful secondary metabolites. They have the good antagonistic activity against the various human pathogens. Hence, it is believed to give a promising output of commercially important product for pharmaceutical industries. Keywords:  Rare actinomycetes; Novel species; Antagonistic activity; Secondary metabolites; Antibiotics Go to Introduction Actinomycetes are widely spread in nature, which are recognized to produce novel secondary metabolites. Among the overall genera in nature, actinomycetes by itself produce 70-80% of the existing antibiotics. In that, Streptomycetes found to produce ...

  Juniper Publishers -  Journal of Oceanography Abstract The abundance and community composition of zooplankton is spatially and temporally variable so it requires sampling over space and time. Quantitative assessment of biomass, community composition, and abundance is sensitive for sampling methodology, including the location and seasonal timing of sampling, as well as mesh size and gear type. Therefore, repeated and consistent sampling is essential to determine the changes in zooplankton distribution, abundance, community composition and seasonal timing at time scales that have impacts on higher trophic levels. In the present study, El-Mex Bay is highly diversified (204 forms) but low standing crop (annual average 8935 organisms/m 3 ). Using GIS and the other mapping applications give an easy and clear image about the distribution of aquatic fauna especially microscopic forms which help in understanding the dynamic of biological ecosystem. Go to Introduction Zooplankton spec...