PRAKASH SANJEEVI
@centreforclimatechangestudies.com
Associate Professor
Sathyabama Institute of Science and Technology
RESEARCH INTERESTS
Systematics, Evolutionary Ecology and Global Change Biology
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
S. Prakash and Amit Kumar
Elsevier BV
Shrutika Raut, S. Prakash, and Amit Kumar
Elsevier BV
K. Kunjulakshmi, S. Prakash, and Amit Kumar
Springer Science and Business Media LLC
Sheena Jose, Sanjeevi Prakash, Thipramalai Thangappan Ajith Kumar, and Uttam Kumar Sarkar
Oxford University Press (OUP)
Abstract We tested the hypothesis that the Hainan’s squat shrimp Thor hainanensisXu & Li, 2014 undergoes a sex change and displays protandric hermaphroditism, a well-known feature from other congeners (T. dicaprioAnker & Baeza, 2021 and T. amboinensis (De Man, 1888)). We used morphological traits indicative of male function to categorize shrimp as prehensile males, non-prehensile males, and females. The linear relationship among the different morphological characters and the sexual morphs revealed that T. hainanensis has a sexual system of partial protandric hermaphroditism, where 50% of the population stays as active males and the rest of the population changes to female. Observations on the social and mating behaviour suggest that T. hainanensis exhibits a ‘search and defend’ mating system unlike other tropical caridean shrimps featuring protandrous hermaphroditism.
J. Antonio Baeza, Sanjeevi Prakash, Pavlína Frolová, Zdeněk Ďuriš, and Arthur Anker
Springer Science and Business Media LLC
Amit Kumar and Sanjeevi Prakash
Hindawi Limited
In this study, we report, for the first time, mitochondrial genome of Narcine timlei (Bloch & Schneider, 1801) and its phylogenetic relationships within the order Torpediniformes. Narcine timlei is a medium-sized ray that occurs in nearshore waters of the Indo-Pacific and is classified as “‘vulnerable” category on the IUCN Red List. The mitogenome is assembled from short Illumina reads (150 bp paired end reads). It is 17,964 bp long and includes 13 protein-coding genes (PCGs), 22 tRNA genes, and 2 rRNA genes. The gene order, size, and nucleotide composition are largely consistent with mitogenomic characteristics of previously reported other Narcine spp. The slightly larger mitogenome length of N. timlei than other Narcine spp. may be due to the presence of a putative control region of 1,916 bp with three tandem repeats. Phylogenetic reconstruction using concatenated PCGs (n = 13) of 9 Torpediniformes based on maximum likelihood and Bayesian inference analysis revealed identical topologies. The tree showed two main clades: one clade containing members of the family Narcinidae and the second sister clade consisting of the families Narkidae and Torpedinidae. Our result supports the monophyletic nature of Narcinidae based on mtDNA. The information obtained in this study will contribute to a better understanding of the population genetics, phylogenetic analysis, conservation, and evolutionary biology research of N. timlei.
Murugesan Rajesh Kannan, Ramkumar Balakrishnan, Muneeswaran Thillaichidambaram, Sivakumar Natesan, Gunasekaran Paramasamy, Sanjeevi Prakash, and Ramakritinan Chockalingam Muthiah
Springer Science and Business Media LLC
A. Vinuganesh, Amit Kumar, S. Prakash, Shereen Magdy Korany, Emad A. Alsherif, Samy Selim, and Hamada AbdElgawad
Elsevier BV
SHRUTIKA RAUT, SANJEEVI PRAKASH, VINUGANESH ARJUNAN, and AMIT KUMAR
Magnolia Press
A new species of marine amphipod, Protohyale covelongensis sp. nov., is described from India. The taxon is fully described and illustrated with which it could be easily identified morphologically. Protohyale covelongensis sp. nov. has a specific shape of the basis of pereopod 7 in the mature male, forming a distinct axe-shaped flange on its anterior margin. This characteristic feature serves to distinguish it from other Indian hyalid species. This new species is also compared with known species with which it could be confused. We have performed molecular phylogeny based on the mitochondrial gene cytochrome c oxidase subunit I. 
K. KUNJULAKSHMI, MACLEAN ANTONY SANTOS, and S. PRAKASH
Magnolia Press
A new species of the freshwater shrimp of the genus Macrobrachium irwini sp. nov., is described from the Nandhini River near Kateel, Karnataka region of Western Ghats, India. 11 specimens of Macrobrachium irwini sp. nov. were collected from Nandhini river running through a secondary forest with heavily vegetated banks. The morphological analyses revealed that the new species can be clearly distinguished from the closely related species, M. snpurii and M. scabriculum based on the shape and dentition on rostrum, antennular peduncle, segmental ratios of first pereiopod, tubercles along the cutting edges of immovable and movable fingers of second major pereiopod and telson. Additionally, we provided the striking colour patterns on the new species which could be distinguish this species from congeneric species. 
A. Vinuganesh, Amit Kumar, Shereen Magdy Korany, Emad A. Alsherif, Samy Selim, Sanjeevi Prakash, Gerrit T. S. Beemster, and Hamada AbdElgawad
MDPI AG
Seaweeds are well known for having a wealth of nutritional benefits and providing ecological support to associated fauna. Seasonality influences the biochemical characteristics, affecting their ecological and economic values. In the present study, we evaluated pigments, primary and secondary metabolites, minerals, and antioxidant properties of green seaweed Chaetomorpha antennina growing on the intertidal rocks along the Covelong coast, India, in different seasons (from June 2019 to March 2020). Significant variations were found in the levels of antioxidants, minerals, and metabolites in different seasons, e.g., amino acid levels were the highest in post-monsoon and the lowest in summer. In monsoon, we found the highest concentration of fatty acids in the thalli. Lipid peroxidation and total antioxidant activity were at their maximum levels during post-monsoon, which indicated oxidative damage responses. No significant variations were found in the levels of photosynthetic pigments. The outcomes indeed suggested seasonal variations in the biochemical and nutrient profile of C. antennina. We suggest that the harvesting/collection of C. antennina for different nutrients and metabolites should be performed in the respective seasons.
S. Prakash and N. Marimuthu
Springer Science and Business Media LLC
RODRIGO GUÉRON, ALEXANDRE OLIVEIRA ALMEIDA, ROBERT AGUILAR, MATTHEW B. OGBURN, SANJEEVI PRAKASH, and J. ANTONIO BAEZA
Magnolia Press
Historically, Lysmata vittata has been reported with a near global non-polar distribution. Early studies reported a wide morphological variation in this species, which served as a basis for further synonymization of at least four species. Herein, we investigated the species diversity within L. vittata complex and tested whether L. rauli and L. durbanensis are valid species instead of junior synonyms of L. vittata. Our integrated morphological and molecular data strongly supports the validity of at least six taxonomic entities within the broader L. vittata complex, including L. rauli and L. durbanensis and three undescribed species. Multivariate analyses highlighted prominent morphological differences in accessory branch structure of dorsolateral antennular flagellum, number of carpal and meral segments of the second pereopod, and color pattern which segregated shrimps into distinct morpho-groups. Phylogenetic analyses supported morphological groupings and recovered five widely divergent lineages, which corresponded to the morphological groupings: L. vittata sensu stricto; L. rauli sensu stricto; L. sp. CHINA; L. sp. AUS1; and L. sp. AUS2. Therefore, we formally resurrect L. rauli to valid species status and posit it is native to the subtropical and tropical Indo West-Pacific. Although data were limited, we also formally resurrect L. durbanensis to valid species status from southern Africa. Our results imply L. vittata and L. rauli are exotic species in the western Atlantic, New Zealand, and the Mediterranean. This study provides a solid framework to continue untangling the historic L. vittata species complex, which is likely to include additional species to the ones included in the present study.
Robert Aguilar, Sanjeevi Prakash, Matthew B Ogburn, Katrina M Pagenkopp Lohan, Kenneth S MacDonald, Amy C Driskell, Shane T Ahyong, Matthieu Leray, Shelby E McIlroy, Troy D Tuckey,et al.
Oxford University Press (OUP)
Abstract Peppermint shrimp resembling Lysmata vittataStimpson, 1860, a species native to the Indo-West Pacific, were found in the lower Chesapeake Bay and adjacent coastal embayments in 2013, representing the first recorded introduction of this species in the northwestern Atlantic. Conflicting morphological descriptions, inconsistent morphological terminology, and limited molecular data (i.e., unresolved taxonomy), as well as the destruction of the type material of L. vittata, created uncertainty regarding proper identification. We provide the first phylogeny incorporating individuals from across the presumed native and introduced range of L. vittata. Morphological and phylogenetic analyses clearly indicate L. vittata represents a species complex of two widely divergent groups: 1) “Bruce Type” with a uniramous dorsal antennule that agrees with A.J. Bruce’s 1990 redescription of L. vittata, and 2) “Rauli Type” with a one-article accessory branch on the dorsal antennule that agrees most closely with the junior synonym L. rauliLaubenheimer & Rhyne, 2010. Given the taxonomic ambiguity surrounding L. vittata, we designate the individual used by A.J. Bruce to redescribe L. vittata and incorporated in our analyses as a neotype to fix the identity of this species. We therefore identify introduced North American and New Zealand populations as L. vittata sensu stricto and postulate that the native range spans temperate/subtropical East Asia. These data suggest that L. rauli is a valid species, which includes a possible undescribed sister species. We confirm the presence of L. californicaStimpson, 1866 in New Zealand, the first non-native record for this species. We also provide data suggesting L. disparHayashi, 2007 may be more widespread in the Indo-West Pacific than currently known and consider L. lipkeiOkuno & Fiedler, 2010 to be a likely junior synonym.
Sanjeevi Prakash, Amit Kumar, Mohammad K. Okla, ALhimadi Ahmad, Zahid Khorshid Abbas, Abdullah A. Al-ghamdi, Gerrit Beemster, and Hamada AbdElgawad
Elsevier BV
A. Vinuganesh, Amit Kumar, S. Prakash, Modhi O. Alotaibi, Ahmed M. Saleh, Afrah E. Mohammed, Gerrit T.S. Beemster, and Hamada AbdElgawad
Elsevier BV
Amit Kumar, Vinuganesh A., and S. Prakash
Elsevier BV
Sanjeevi Prakash, Thangapandi Marudhupandi, Jeyagoby Balamurugan, and Thipramalai Thangappan Ajith Kumar
Wiley
Sanjeevi Prakash, Ampuli Muthu, and Amit Kumar
Cambridge University Press (CUP)
AbstractThe peacock-tail shrimp Ancylocaris brevicarpalis Schenkel, 1902, is an obligate symbiont of sea anemones and well known for its remarkable colouration. Yet, very little information is available about its population structure and life-history traits, including reproductive parameters (fecundity, embryo volume and reproductive output). A total of 574 individuals were collected from the Gulf of Mannar, Tamil Nadu, India between February 2017 and July 2018, out of which 214 were males (37.28%), 355 were females (61.84%), and 5 (0.87%) juveniles. The highest percentage of individuals were observed in the post-monsoon season (38.10%) followed by monsoon (34.85%), pre-monsoon (15.02%), and summer seasons (12.01%). The overall sex ratio was skewed towards female individuals (0.55 male: 1 female). Fecundity was higher in females carrying early-stage embryos and embryo volume did increase, but not statistically significantly from early to late stages. The reproductive output was negatively allometric to the mean female body weight. The present study provides first-of-its-kind information on the population as well as individual-level reproductive characteristics of A. brevicarpalis.
Amit Kumar, Dev Adhavan, Vinuganesh A., and Sanjeevi Prakash
Hindawi Limited
ALEXEI V. CHERNYSHEV, NEONILA E. POLYAKOVA, MOHANDHAS S. VIGNESH, RUCHI P. JAIN, PRAKASH SANJEEVI, JON L. NORENBURG, and RAJAIAN P. RAJESH
Magnolia Press
A new species of the genus Tetrastemma Ehrenberg, 1831, T. freyae sp. nov., is described and illustrated from Hawaii and India. The description is based on light microscopy examination of the external and internal morphology, as well as on two gene markers (cytochrome c oxidase subunit I and histone H3 DNA).