Bioinvasion of Mytella strigata (Hanley, 1843) in Ashtamudi Lake, Kerala, India – is pollution aggravating environmental degradation in Ramsar wetland?



Published Mar 9, 2023
Vineetha Vijayan Santhi
Joelin Joseph Mano Mohan Antony


Polluted or degraded aquatic ecosystems accumulate more invasive species than less polluted areas. The alien invasive mussel Mytella strigata (=charruana) was reported to be affecting wild spats of mussels as a dominant competitor for space on floating substrates which is native to Central and South America later outspread to east coast of central Florida and subsequently reported from Philippines. The tremendous increase of M. strigata population in Ashtamudi Lake is raising an alarming situation over the native bivalve species as it compete for space, breeding ground, substrates and food. The broad salinity ranges allows them to invade via ballast exchange of water and the fouled ship hulls. When salinity levels goes beyond the thresholds of the native species, M. strigata can sometimes outcompete them. Moreover, the molecular phylogenetic analysis via COI sequences shows a close genetic relationship shared between the native mussel Perna viridis and the alien invasive mussel M. strigata. The increasing pollution load along with the solid waste disposal in the Lake, is accelerating the spat fall of M. strigata over the native species and therefore should be a priority in the bioinvasion control, otherwise can lead to displacement or local extinction of the native species.

How to Cite

Vijayan Santhi , V., Joseph, J., & Antony, M. M. (2023). Bioinvasion of Mytella strigata (Hanley, 1843) in Ashtamudi Lake, Kerala, India – is pollution aggravating environmental degradation in Ramsar wetland?. Environment Conservation Journal, 24(2), 48–53.


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Ashtamudi Lake, gene sequencing, invasive, Mytella strigata, phylogeny

APHA. (1989). Standard Methods for the Examination of Water and Wastewater. American Public health Association, Washington DC.
Biju Kumar, A., Ravinesh, R., Oliver, P. G., Tan, S. K., & Sadasivan, K. (2019). Rapid bioinvasion of alien mussel Mytella strigata (Hanley, 1843) (Bivalvia: Mytilidae) along Kerala coast, India: will this impact the livelihood of fishers in Ashtamudi Lake? Journal of Aquatic Biology & Fisheries,, 7, 31-45.
Boehs, G., Absher, T. M., & da Cruz-Kaled, A. (2004). Composition and distribution of benthic molluscs on intertidal flats of Paranagua Bay (Paraná, Brazil). Scientia Marina, 68(4), 537-543.
Boudreaux, M. L., & Walters, L. J. (2006). Mytella charruana (Bivalvia: Mytilidae): a new, invasive bivalve in Mosquito Lagoon, Florida. Nautilus-Greenville, 120(1), 34.
Dukes, J. S., & Mooney, H. A. (1999). Does global change increase the success of biological invaders?. Trends in ecology & evolution, 14(4), 135-139.
Folmer, O., Black, M., Hoeh, W., Lutz, R., Vrijenhoek, R., (1994). DNA primers for amplification of mitochondrial cytochrome C oxidase subunit I from diverse metazoan invertebrates. Molecular Marine Biology and Biotechnology, 3, 294-299.
Gosling, E. M. (2003). Bivalve molluscs. Blackwell Pub.
Gurevitch, J. and Padilla, D.K., 2004. Are invasive species a major cause of extinctions? Trends in ecology & evolution, 19(9), 470-474.
Hall, T. (1999). BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. In Nucleic Acids Symp. Ser, 41, 95-98.
Ivanov, V.P., Kamakin, A.M., Ushivtzev, V.B., Shiganova, T., Zhukova, O., Aladin, N., Wilson, S.I., Harbison, G.R., Dumont, H.J., 2000. Invasion of the Caspian Sea by the comb jellyfish Mnemiopsis leidyi (Ctenophora). Biological Invasions, 2, 225-258.
Jayachandran, P. R., Aneesh, B. P., Oliver, P. G., Philomina, J., Jima, M., Harikrishnan, K., & Nandan, S. B. (2019). First record of the alien invasive biofouling mussel Mytella strigata (Hanley, 1843) (Mollusca: Mytilidae) from Indian waters. BioInvasions Record, 8(4).
Kumar, S., Stecher, G., & Tamura, K. (2016). MEGA7: molecular evolutionary genetics analysis version 7.0 for bigger datasets. Molecular biology and evolution, 33(7), 1870-1874.
Lim, J. Y., Tay, T. S., Lim, C. S., Lee, S. S. C., Teo, S. M., & Tan, K. S. (2018). Mytella strigata (Bivalvia: Mytilidae): an alien mussel recently introduced to Singapore and spreading rapidly. Molluscan Research, 38(3), 170-186.
Mediodia, D. P., De Leon, S. M. S., Anasco, N. C., & Baylon, C. C. (2017). Shell morphology and anatomy of the Philippine Charru mussel Mytella charruana (D’orbigny 1842). Asian Fisheries Science, 30(3), 185-194.
Occhipinti-Ambrogi, A. (2007). Global change and marine communities: alien species and climate change. Marine pollution bulletin, 55(7-9), 342-352.
Pereira, O. M., Hilberath, R. C., Ansarah, P. R. A. C., & Galvao, M. S. N. (2003). Production estimate of Mytella falcata and M. guyanensis in natural beds of Ilha Comprida Estuary (Sao Paulo, Brasil). Boletim do Instituto de Pesca, 29, 139-149.
Quayle, D. B., & Newkirk, G. F. (1989). Farming bivalve molluscs: methods for study and development. World Aquaculture Society, Baton Rouge, La., US.
Rahel, F. J., & Olden, J. D. (2008). Assessing the effects of climate change on aquatic invasive species. Conservation biology, 22(3), 521-533.
Rice, M. A., Rawson, P. D., Salinas, A. D., & Rosario, W. R. (2016). Identification and salinity tolerance of the Western hemisphere mussel Mytella charruana (D'Orbigny, 1842) in the Philippines. Journal of Shellfish Research, 35(4), 865-873.
Rocha, R. M., Cangussu, L. C., & Braga, M. P. (2010). Stationary substrates facilitate bioinvasion in Paranaguá Bay in southern Brazil. Brazilian Journal of Oceanography, 58(SPE3), 23-28.
Sanpanich, K., & Wells, F. E. (2019). Mytella strigata (Hanley, 1843) emerging as an invasive marine threat in Southeast Asia. BioInvasions Records, 8(2), 343-356.
Shiganova, T., Mirzoyan, Z., Studenikina, E., Volovik, S., Siokou-Frangou, I., Zervoudaki, S., & Dumont, H. (2001). Population development of the invader ctenophore Mnemiopsis leidyi, in the Black Sea and in other seas of the Mediterranean basin. Marine biology, 139(3), 431-445.
Sitaram, N. (2014). Impact of urbanisation on water quality parameters–a case study of Ashtamudi Lake, Kollam. International Journal of Research in Engineering and Technology, 3(6), 140-147.
Spinuzzi, S., Schneider, K. R., Walters, L. J., Yuan, W. S., & Hoffman, E. A. (2013). Tracking the distribution of non-native marine invertebrates (Mytella charruana, Perna viridis and Megabalanus coccopoma) along the south-eastern USA. Marine Biodiversity Records, 6.
Vallejo Jr, B., Conejar-Espedido, J., Manubag, L., Artiaga, K. C. C., Damatac, I. I., Amor, M., & Cao, E. P. (2017). First record of the Charru mussel Mytella charruana d'Orbignyi, 1846 (Bivalvia: Mytilidae) from Manila Bay, Luzon, Philippines. BioInvasions Record, 6(1).
Yuan, W., Walters, L. J., Schneider, K. R., & Hoffman, E. A. (2010). Exploring the survival threshold: a study of salinity tolerance of the nonnative mussel Mytella charruana. Journal of Shellfish Research, 29(2), 415-422.
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