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Latest News
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SALIENT ACHEIVEMNTS (January 2022 to December 2022)
PHENOLOGY, TROPHODYNAMICS & DISTRIBUTION
- The trophodynamics, phenology & reproductive parameters of 29 climate-vulnerable teleost fishes from different regions were undertaken.
- Distribution of 5 marine species in the Arabian Sea and Bay of Bengal was studied during the period and geocoded data was mapped in the GIS platform
- Climatic resilience and adaptive potential of clupeid fishes of the world oceans investigated using comparative mitogenomics.
- Confirmed presence of locally adapted sardine stocks in the Indian Ocean using ddRAD sequencing.
CLIMATE CHANGE MODELING OF MARINE FISHERIES
- Climate change impacts on the fishery and phenology of Indian Oil Sardine (IOS), Indian mackerel, and threadfin bream were estimated for different RCP scenarios.
- A multi-species multigear biomass dynamic model with predator-prey interactions was developed to study the influence of different environmental variables on the biomass of marine fishery resources.
- Larval dispersal model created for Indian oil sardines along the southwest coast of India for predicting climatic impacts using FVCOM (Finite volume community ocean model).
- Developed a short-term forecast model for the availability of Indian Oil sardine
BLUE CARBON POTENTIAL OF MANGROVE, SEA GRASS & SEAWEED ECOSYSTEMS
- The mangroves, sea grass, and seaweed cover and their carbon mitigation capacity along the Toothukudi coast of Tamil Nadu and the Calicut coast of Kerala were estimated.
GEOSPATIAL ASSESSMENT OF MARINE HABITATS AND ISLAND ECOSYSTEMS
- As part of the integration of field data to a geospatial database through the ISRO-CMFRI-NICRA wetland mobile application, continuous samplings were done on 96 wetlands around coastal villages of Kerala, Karnataka, and Tamil Nadu.
- Evaluated the temporal changes in the seagrass coverage of Kalpeni lagoon from 2003 to 2020 by analyzing Landsat data on Google Earth Engine and studied the influence of selected climate factors on the seagrass coverage. The study reveals decline in more than 99% of seagrass coverage, indicating an alarming threat to this seagrass ecosystem of the region.
Impact of climate change on Phenology & Trophodynamics
- Variations in climate parameters assessed and its impact revealed changes in distribution, abundance, spawning, maturity, fecundity of several marine fishes
- Favourable climate driven changes in some small pelagic fish population distribution / abundance were also identified.
Carbon Footprint Assessment
- Carbon sequestration potential of Seaweeds and Mangroves assessed from Calicut and Cochin.
- Complete Carbon Lifecycle Assessment done for fishing operations from boatbuilding, to actual fishing till fish processing and till product reach consumer.
- Focused on biochar applications in marine sector (farming and soil and water quality)
Vulnerability Assessment
- Scientific criteria developed for vulnerability assessment of indian marine fish stocks to climate change and resilience options identified.
- Zone wise vulnerable species has been identified.
Climate Resilient Strategies
- Farming of stress tolerant species (Silver pompano, Pearl spot) in ponds and cages.
- Low cost farming techniques (All weather mooring system, cages)
- IMTA (Seaweed & Cobia)
- Paddy-Finfish farming in Pokkali fields
- Product development (‘Pearl plus’ fish feed, Jaiva Pokkali)
Integrated District Level Adaptation & Mitigation
- A framework to assess the climate change vulnerability of resource users was developed, allowing assessment of the vulnerability of coastal households.
- This helped to boost awareness, preparedness and mitigative capacities of vulnerable areas.
Impacts of climate change on larval development
- Experimentation revealed that higher temperature shortened incubation duration and quickened larval growth rate; but with low hatching and larval success.
Empowerment of stakeholders
- Awareness programs, trainings and technology demonstrations were conducted for fishers and fishermen across coastal states.
- Capacity building programs conducted for scientists, researchers and fisheries officials.
- Training provided for alternative livelihood options, disaster preparedness.
Knowledge Database compilation
- Compilation of ITK of indian marine fishermen to climate change in English and regional language.
- Digitization of fishing records.
PUBLICATIONS (IN PEER-REVIEWED JOURNALS (2021-22)
- Wilson Sebastian, Sandhya Sukumaran, Abdul Azeez S, Muraleedharan KR, Dinesh Kumar P K, Zacharia PU and Gopalakrishnan A (2021) Genomic investigations provide insights into the mechanisms of resilience to heterogeneous habitats of the Indian Ocean in a pelagic fish. Nature Scientific Reports. pp. 1-16.
- Wilson Sebastian, Sandhya Sukumaran, A. Gopalakrishnan. 2022. Comparative mitogenomics of Clupeoid fish provides insights into the adaptive evolution of mitochondrial oxidative phosphorylation (OXPHOS) genes and codon usage in the heterogeneous habitats. Heredity. https://doi.org/10.1038/s41437-022-00519-z.
- Rajesh, K.M., Thomas, S., Sukumaran, S., Purushottama, G.B., Nataraja, G.D., Dineshbabu, A.P., Rohit, P. and Zacharia, P.U., 2022. New distributional record of greater amberjack Seriola dumerili (risso, 1810)(perciformes: Carrangidae) from the eastern arabian sea, India. Indian Journal of Animal Research, 56(2), pp.243-248.
- Ansar, C.P., Vinod, K., Asokan, P.K., Zacharia, P.U., Anasukoya, A., Kunhikoya, V.A., Nikhiljith, M.K. and Anirudh, K. 2022. Evaluation of biomass and carbon storage potential of a natural mangrove stand in Muzhappilangad, Kerala, south-west coast of India. J. Mar. Biol. Assoc. India, 63 (2): 18-26.
- D. Linga Prabu; Kalidas C; Ranjith L; Sanal Ebeneezar; Kavitha M; Zacharia P.U.; Mathan Babu A; Ramar Muniswaran B; Vijayagopal P (2022). Elevated water temperature on feed intake, growth, metabolism and antioxidant defence system of Snubnose pompano, Trachinotus blochii. Aquaculture International (Accepted) AQUI-D-21-00593R5.
- Rahangdale, R. Kumar, V. Vase, & P. U. Zacharia. (2022). Estimation of Maximum Sustainable Yield for Lesser Sciaenids Fishery of North-Eastern Arabian Sea using Surplus Production Model with Environmental Effects. Journal of ichthyology, 62, 632-640. doi: 10.1134/S0032945222040208.
- Sebastian, T., Sreenath, K.R., Sreeram, M.P. and Ranith, R., 2022. Dwindling seagrasses: A multi-temporal analysis on Google earth engine. Ecological Informatics, p.101964.
- Anakha, M., Sreenath, K. R., Joshi, K. K., Shelton, P.,Nameer, P. O. 2022. Nandini N. Menon Predicting the geographical distribution of Acropora muricata in two lesser‑known reef systems of the Andaman Sea. Journal of Coastal Conservation (Accepted.).
- Shana, S.S. ,Sreenath, K. R., Sumithra, T. G., Krishnaveny, M. S., Joshi ,K. K., Nameer P. O. Gopalakrishnan A. 2022 A Global‐Scale Ecological Niche Modeling of the Emerging Pathogen Serratia marcescens to Aid in its Spatial Ecology . Current Microbiology (Accepted.).
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