http://nopr.niscpr.res.in/handle/123456789/60904 2026-10-09T15:35:30Z 2026-10-09T15:35:30Z Yazir, D Terzi, Y Erüz, C http://nopr.niscpr.res.in/handle/123456789/60919 2022-11-24T05:55:51Z 2022-11-01T00:00:00Z

Title: Transportation of microplastic during high-flow and low-flow seasons in southeastern Black Sea: A modelling approach Authors: Yazir, D; Terzi, Y; Erüz, C Abstract: Predicting the transportation patterns of microplastic particles is crucial for assessing the environmental risks. The present work studied the transportation and accumulation of floating microplastic particles released from the largest river basin (Değirmendere), on the southeastern Black Sea coast. A total of 2 scenarios were simulated for high-flow and low-flow seasons to predict the effect of freshwater input on the concentration, transportation and accumulation patterns of microplastic particles by using a Lagrangian model; the Estuarine, Coastal Ocean Model with Sediment Transport (ECOMSED) model. Microplastic concentration varied between 168 – 1412 particle/m3 and 0 – 843 particle/m3 in the high-flow and low-flow seasons, respectively. Microplastic particles released from the river showed different accumulation patterns with time. However, the particles tended to accumulate on coastal waters in both scenarios. The present study provides a baseline for determining the hotspots for the accumulation of floating microplastic particles to assess optimal sampling locations and risk assessment in the southeastern Black Sea. Page(s): 663-670

2022-11-01T00:00:00Z Salim, S S S, Monolisha http://nopr.niscpr.res.in/handle/123456789/60917 2022-11-24T05:52:57Z 2022-11-01T00:00:00Z

Title: Very severe cyclonic storm “Gaja” and its impact off the Tamil Nadu coastline Authors: Salim, S S; S, Monolisha Abstract: This paper presents an overview of the Gaja – a very severe cyclonic storm that battered thousands of lives in Cauvery delta regions of Tamil Nadu. The cyclone originated from the Gulf of Thailand on 5th November 2018 and gradually turned into a very severe cyclonic storm that made a landfall at Tamil Nadu coast on 15th November 2018. Nagapattinam was one of the most affected coastal districts, which endured extensive damage due to coastal flood and wind-rose to about 120 kmph. The current study was focused on the impact assessments of the co-operative society members. The statistical chisquare distribution was calculated to substantiate the significant relationships between the physical attributes, socioeconomic conditions and level of vulnerability to the coastal communities affected by the cyclone. The major findings of the study reveals that the human vulnerability is highly significant to the physical attributes and socio-economic factors such as mean sea level, distance of house-holds from the shore-line, house type, income and education. The study suggests that the policy managers should proactively consider all the identified variables homogeneously to proficiently improvise the disaster management, preparedness; adaptation and mitigation measures to efficiently conserve the resources from vulnerable hazards. Page(s): 671-679

2022-11-01T00:00:00Z Pattnayak, S P Prusty, B A K http://nopr.niscpr.res.in/handle/123456789/60915 2022-11-24T05:49:59Z 2022-11-01T00:00:00Z

Title: Observations on the mortality of olive ridley sea turtles (Lepidochelys olivacea) and associated factors along Ganjam coast, east coast of India Authors: Pattnayak, S P; Prusty, B A K Abstract: The Odisha coast along the east coast of India is home to three mass nesting sites (Gahirmatha, Devi and Rushikulya) and several sporadic nesting sites for olive ridley sea turtles. The coastline in the Ganjam district of Odisha has more than nine beaches that report olive ridleys (Lepidochelys olivacea) nesting, including one mass nesting site i.e the Rushikulya estuary. To develop a better understanding of beach habitat conditions along the Ganjam district's 60-km-long coastline, a survey was conducted and data on the extent of olive ridley mortality, associated threats (both direct and indirect), and factors affecting habitat loss, were collected. The survey was carried out entirely on foot between March and April 2020, visiting nine separate sites three times each. Dead turtle carcasses were seen on only seven out of the nine beaches. The major threats observed were fishing activities and predation; while plastic contamination, topographical changes (shifting in Rushikulya river mouth), vehicular movements, and artificial lighting were the factors associated with habitat degradation. The highest incidences of mortality were caused by fishing activity. In addition, maximum turtle mortality was seen at lower elevations (3 – 6 m above MSL) as compared to beaches with higher elevations. The current survey on olive ridley turtle mortality is the first of its kind along the Ganjam coast and the findings underscore the importance of solidifying conservation efforts on the olive ridleys' habitat. Page(s): 680-687

2022-11-01T00:00:00Z Padmanaban, D Muthusamy, R G Sahayanathan, G J Raja, K Chinnasamy, A http://nopr.niscpr.res.in/handle/123456789/60913 2022-11-24T05:46:28Z 2022-11-01T00:00:00Z

Title: Evaluation of biochemical and antioxidant properties of crude extracts from the Indian cattle leech Poecilobdella granulosa Authors: Padmanaban, D; Muthusamy, R G; Sahayanathan, G J; Raja, K; Chinnasamy, A Abstract: Oxidative stress is one of the factors influencing the structure and function of cells, tissues, and their components. Natural antioxidants have emerged as prophylactic and therapeutic agents for diseases like cancer and cardiovascular disease. The objective of the current study is to assess the biochemical composition and antioxidant potential of crude extracts from various organs of the Indian cattle leech Poecilobdella granulosa. The biochemical constituents and protein profiles of various crude samples were determined by Native and SDS polyacrylamide gel electrophoresis. Moreover, four different crude samples were subjected to check free radical scavenging activity. In the biochemical analysis, protein and carbohydrate content were found to be higher in whole-body extract and several major and minor bands were found ranging from 22 to 110 kDa during qualitative analysis. Interestingly, among the four crude samples, saliva alone showed antioxidant activity by 2,2-diphenyl-1-picrylhydrazyl and superoxide anion radical scavenging activity. This study concluded that the crude saliva extract from P. granulosa is a highly selective and effective antioxidant for human welfare. Page(s): 688-693

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