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 The study examines the ecological and economic implications of dredging activities on fishing sites in the Niger Delta area of Nigeria. Data from secondary sources were empirically analysed and results show that dredging operations have significant effect on fishing sites. These are revealed by the magnitude of ecological and economic implications to the region, which is reflected by the level of economic value of damage caused by dredging in the area, the number of fishing sites and farm lands affected by the dredging operations. The study concludes that even though dredging is imperative for the economic survival of the area, there is need for routine studies to be conducted prior to the operations so as to ensure that dredging activities are executed in the most environmentally friendly manner in accordance to international best practices in order to mitigate ecological imbalance in the basin. Keywords:  Ecology;...

  Juniper Publishers -  Journal of Oceanography Abstract Recent report of  Hydrocharis morsus-ranae  from Kasmir Himalaya-India should serve as an early warning to the whole South Asia that this invasive species might be already in the phase of breaking down of the historical biogeographic barrier (Himalayas) and may be introduced in the adjoining areas of South-East Asia in the near future. Therefore, it is high time to initiate early detection and rapid response, the most cost- effective strategy with maximum chances of success in the management of plant invasions. Keywords:  Early warning; South Asia; Invasion; Biogeographic barrier Go to Introduction The genus  Hydrocharis L.  is widely distributed in tropical and temperate regions of the old world (Cook and Luond, 1982), and comprises of 3 species namely:  H. dubia  (Blume) Backer,  H. morsus- ranae  L. and  H. chevalieri  (De Wildeman) Dandy. Biogeographically, these...