Effects of Radiation Absorption and Mass Transfer on the Free Convective Flow Passed a Vertical Flat Plate through a Porous Medium in an Aligned Magnetic Field

This article analyses the effects of radiation absorption and mass transfer on the steady free convective flow of a viscous, incompressible and electrically conducting fluid past an infinite vertical flat plate through a porous medium with an aligned magnetic field. Analytical solutions for concentration, temperature, and velocity are obtained by solving the governing equations in two cases namely (i) when the plate is at uniform temperature and concentration and (ii) when the plate is at constant heat and mass flux. Further the rate of mass transfer in terms of the Sherwood number, rate of heat transfer in terms of Nusselt number and skin friction in terms of shear stress are also derived. The effects of various flow parameters on concentration, temperature, velocity, Sherwood number, Nusselt number and skin-friction affecting the flow field are discussed and analyzed

Dufour and Thermal Radiation Effects of Kuvshinski Fluid on Double Diffusive and Convective MHD Heat and Mass Transfer Flow Past a Porous Vertical Plate in the Presence of Radiation Absorption, Viscous Dissipation and Chemical Reaction

In this paper an analysis is presented to investigate the influence of diffusion thermo, thermal radiation, radiation absorption, chemical reaction and viscous dissipation on hydro magnetic free convective heat and mass transfer flow of Kuvshinski fluid past a porous vertical plate. A uniform magnetic field of is applied in the direction of the flow field.  Analytical solutions for velocity, temperature and concentration are obtained by using a Perturbation technique. Skin friction, rate of heat and mass transfer coefficients are also derived. The results have been analyzed graphically and numerically for various values of the flow parameters

Fishery and stock structure of Thunnus albacares (Bonnaterre, 1788) off Andhra waters along western Bay of Bengal

537-542The fishery and stock structure of Thunnus albacares off Andhra waters along western Bay of Bengal was studied from 2012 to 2015. The average annual landing of the species during the study period was 5,952 t contributing 32.9 % of the total tuna landings. Gill nets contributed 59 % of the catches, followed by hook and lines (34 %). Von Bertalanffy growth equation was Lt = 196.35 [1 – e–0.23 (t+0.0546)] and natural mortality, fishing mortality and total mortality was 0.4, 0.71 and 1.11 with exploitation ratio of 0.64 and exploitation rate of 0.43. Annual average stock, standing stock biomass and maximum sustainable yield were 13,879 t, 8,383 t and 4,653 t, respectively. Yield per recruit and biomass per recruit estimated were 2584.7 g and 3640.4 g. The exploitation rate, yield and yield per recruit indicate the stock of T. albacares to be overexploited. To sustainably and optimally harvest the species, reduction in the present fishing effort by 60 % is necessary, thereby increasing the yield by 35.31 %. With overcapacity in the number of gillnetters and hook and line units operating in the waters off Andhra Pradesh, implementation of the recommended fleet size proposed by Central Marine Fisheries Research Institute by means of buy-back measures and strict adherence to Minimum Legal Size at harvest would ensure sustainable and optimum exploitation of the resource