Juniper Publishers-Oceanography Open Access Journal

  Oceanography & Fisheries Open Access Journal Abstract Upper ocean thermodynamic and biological responses between the two super cyclones namely Gonu (1-7 June 2007) and Kyarr (24 Oct – 02 Nov 2019) were investigated using multi-satellite datasets, and hycom model data. During Gonu, one strong cooling patch (>5.5°C) observed but in the case of Kyarr it is 3.8°C was observed along its track. The locations of these cold patches are highly correlated with the relative depth of the 26°C isotherm and mixed layer depth (MLD) and upper ocean heat content (UOHC). The enhancement of surface chlorophyll a (chl-a) concentration was detected in these cold regions as well, mainly due to the TC-induced mixing and upwelling. Moreover, the existing ocean cyclonic eddy has been found to significantly modulate the magnitude of surface cooling and chl-a increase during the Kyarr period. The possible causes of intensity change of cyclones were also explored with UOHC. Upper ocea...

 Abstract The status of valid species and distributional range of mudskippers (oxudercine gobies) in Indonesian waters are reviewed here. There are 24 species of mudskippers recently recorded. Refered to seven largest islands region in Indonesia, Sumatra has largest number of mudskippers (14 species), following Java (12 species, Lesser Sundas (11 species), Kalimantan (9 species), West Papua (9 species), Sulawesi (8 species) and Moluccas (8 species). Further research is required to clarify distributional range and to adress conservation challenge of mudskippers in Indonesian waters.  Read more about this article:  https://juniperpublishers.com/ofoaj/OFOAJ.MS.ID.555769.php Read more Juniper Publishers Google Scholar articles  https://scholar.google.com/citations?view_op=view_citation&hl=en&user=V6JxtrUAAAAJ&citation_for_view=V6JxtrUAAAAJ:B3FOqHPlNUQC

  Juniper Publishers -  Journal of Oceanography Opinion Offshore aquaculture is the practice of marine farming where the fish farm cages are placed further from the shores into deeper ocean areas. This helps in increasing the size of farms, reduces danger of accidents with marine traffic and the waste from cage is easily washed away with stronger currents in the open ocean. One major disadvantage is that such a cage requires sophisticated technology and large investments. India has over 8000 km of coastline with great potential for development of mariculture. The exclusive economic zones which can extend up to at least 200 nautical miles from the coast, as shown in (Figure 1) (left), gives India a vast area for developing mariculture. Most of this potential remains underutilized as the locals and regional authorities lack the technical know-how and transfer of technology from academia to industry and local companies is extremely poor. Offshore cage design present considerable ...

  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 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 Opinion Different climate models have concluded that the average global temperature has increased in the last century [ 1 ]. This change in global temperature has influenced climate conditions worldwide affecting population dynamics (e.g. phytoplankton communities) in ecosystems in different ways [ 1 - 3 ]. In terms of aquatic ecosystems, evidence has shown that some photo synthetic microorganisms may adapt and thrive successfully under warmer climatic conditions, while other cannot [ 4 ]. The toxigenic cyanobacterium  Microcystis aeruginosa  (Kutzing) Kutzing 1846 is a gram-negative photosynthetic prokaryote adapted to a wide range of environmental conditions in mesotrophic and eutrophic aquatic ecosystems [ 5 ]. The main family of toxins synthetized by  M. aeruginosa  are microcystins (hepatotoxins); in nature, more than 90 microcystin congeners are known [ 6 ]. Microcystins are water-soluble and stable mole...