Juniper Publishers-Oceanography Open Access Journal

  Juniper Publishers -  Journal of Oceanography Abstract The knowledge of ocean waves is an essential prerequisite for almost all activities in ocean. Traditional methods have disadvantages of excessive data requirement, time consumption and are tedious to carry out. ANN is being widely applied in coastal engineering field since last two decades in variety of time series forecasting. Study has been carried out to predict waves using FFBP and NARX networks. Wave data obtained from INCOIS is made use in the present study. Effect of network architecture on the performance of the model has been studied. It was found that for time series prediction NARX network outperforms FFBP. Keywords:  Artificial neural network; Feed forward back propagation network; Non-linear auto regressive with exogenous input; Coastal engineering Go to Introduction Accurate forecasting of wave characteristics is important for many coastal and marine activities. Different methods have been developed fo...

  Juniper Publishers -  Journal of Oceanography Abstract In order to find out the solution of various problems prevailing in the marine and offshore ecosystems in India, the present authors, as regular routine practice of versatile research work respectively, have been concentrating their respective scientific research on marine pollution, ocean acidification, coastal resource management and its social impact study and have presented their respective papers in various national and international conferences and obtained interactions. In order to ponder the real time solution, the present paper deals with the observation and experience obtained by the respective authors which are the derivatives of scientific and societal thought presented in this paper as a product of intermittent and cumulative manners and opined suggestive issues on the present and future significance of marine and coastal research activities, apprehensions and its various hindrances. Issues of marine conserv...

       Juniper Publishers -  Journal of Oceanography Abstract Bacteria on substrata certainly influence metamorphosis and settlement of coral larvae. We isolated bacteria from substrata and screened them for the capability of inducing or inhibiting metamorphosis of Acropora. Out of 468 isolates, only eight isolates revealed metamorphosis- inducing activities, which were weak or non-reproducible. Three of those isolates were identified as Alteromonasspp. Based on by 16SrDNA.On the other hand, metamorphosis-inhibiting bacteria were obtained efficiently, two out of 20 isolates, indicating a majority in bacterial communities on substrata. One revealed quick but temporal inhibition and the other revealed slow but persistent inhibition onto the metamorphosis induction by a peptide hormone. Thus, at least two inhibition pathways are suggested. Both of the two strains turned out to belong to the genus Pseudoalteromonas. Responses of coral larvae to mixt...