http://nopr.niscpr.res.in/handle/123456789/63799 Fri, 09 Oct 2026 16:28:56 GMT 2026-10-09T16:28:56Z http://nopr.niscpr.res.in/handle/123456789/63804 Title: Bioeconomic modelling of marine fisheries: Seeking keys to sustainable income for marine fishers of Mumbai, India Authors: Reshi, S N; Qureshi, N W; Krishnan, M; Ananthan, P S; Pawar, N Abstract: To address the issue of overfishing, sustainability and its effect on marine fishers’ income, this study was taken up in Mumbai, India. Greater Mumbai was studied at micro level. Primary data on capital costs, operating costs and returns to mechanized fishing were collected. Secondary data on marine fish landings, landings from the trawlers and total effort of trawlers was collected from 2000 – 2018. The Gompertz-Fox Model was used, and results showed that Maximum Sustainable Yield (MSY) was at 1,04,099 tonnes of fish and effort level corresponding to MSY (EMSY) at 43,363 fishing trips against the current 1,31,118 tonnes and 33,466 trips. Maximum Economic Yield (MEY) was calculated to be 1,03,030 tonnes, while the estimated value of effort (EMEY) was 37,429 trips. Therefore, the current fishing yield was found to be both biologically and economically unsustainable. The study concluded that the catch and income of fishers may be sustainably enhanced by following the MSY and MEY approach. Fishing at MEY will yield increased income in real terms as well as saved catch will ensure minimisation of environmental damage. Reducing the input costs will enable savings on wasteful operational costs, resulting in increased savings, which in other words, is income, since averted loss is income earned. Page(s): 321-329 Sat, 01 Jul 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63804 2023-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63803 Title: Numerical solutions in a laminar motion of magnetohydrodynamic Maxwell liquid past a permeable shrinking plate Authors: Sharma, R P; Shafi, S; Reddy, M G Abstract: In recent years, there has been a notable rise in interest in the boundary layer theory of non-Newtonian fluids, driven by both academic curiosity and engineering applications. The nonlinearity of the equations can manifest itself in various ways across a broad spectrum of industries, encompassing biotechnology, drilling operations, and the food sector. The term Maxwell fluid describes the characteristics related to relaxation time and falls within the category of rate-type fluids. Researchers are intrigued by the challenges associated with solving nonlinear and higher-order differential equations. In the present problem, the magnetohydrodynamics (MHD) Maxwell liquid over a porous contracting surface is discussed numerically. In the analysis, a consistent transfer of divider concentration is examined. The governing/controlling equations of the fluid flow are changed using similarity transformations. The numerical results were found by using the R-K-4th order-based shooting technique with the assistance of MATLAB software. The graphical representation is displayed through stability analysis. The results indicate that the first solution exhibits greater stability. The magnetic parameter and suction effect enhance the velocity profile, whereas the Deborah number yields opposite results. Page(s): 330-338 Sat, 01 Jul 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63803 2023-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63802 Title: Pink spot: A serious threat to scleractinian corals (Porites spp.) in Andaman archipelago Authors: Mondal, T; Raghunathan, C Abstract: Throughout their existence, coral reefs around the world have encountered a range of challenges, both natural and human-made. Despite these hurdles, they have displayed remarkable resilience and managed to withstand the cycle of life and death. One major threat to these reefs is the pink spot disease, which causes significant harm to the diversity of reef ecosystems on a global scale. Recently, the Andaman Islands experienced the destructive consequences of this disease on three types of stony corals belonging to the Poritidae family - Porites lutea, P. lobata, and P. solida. The affected colonies suffered a decline in live reef cover ranging from 15 to 39 %. Page(s): 339-342 Sat, 01 Jul 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63802 2023-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63801 Title: First report of South African flabellid coral Truncatoflabellum zuluense Cairns & Keller, 1993 (Scleractinia: Flabellidae) from Andaman and Nicobar Islands, India Authors: Mondal, T; Raghunathan, C Abstract: Limited research has been conducted on azooxanthellate scleractinian corals in Indian waters due to their wide vertical distributional range. The Flabellidae family of corals, which includes the Truncatoflabellum genus, can be found at various depths, ranging from shallow regions to the deeper parts of the oceans. In this particular investigation, a species of Flabellidae coral, Truncatoflabellum zuluense Cairns & Keller, 1993, was identified in Indian waters for the first time. This species was recorded at a depth of 31 m. Previously, it had only been documented off Zululand in South Africa, at depths ranging from 62 – 84 m. The addition of this species in Indian waters is significant as it expands its zoogeographic range beyond its original location. This finding emphasizes the importance of ongoing research on these corals in different regions to gain a better understanding of their distribution and diversity. Page(s): 343-346 Sat, 01 Jul 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63801 2023-07-01T00:00:00Z