Population characteristics of <i>Villorita cyprinoides</i> in Vembanad Lake, India

Krishna, Aswathy Vijaya; Parvathi, Ammini

doi:10.1080/10402381.2017.1394941

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…1 a). The genus Villorita embracing V. cyprinoides is traditionally considered to be monotypic 20 and acclaimed as prime species in Indian clam fisheries, prominently cherished for both meat and shell 21 . Despite the tedious collection and processing exercise for the marketing of black clam (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Mitogenomic architecture of the multivalent endemic black clam (Villorita cyprinoides) and its phylogenetic implications

Rahuman

Jeena

Asokan

et al. 2020

Sci Rep

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The Indian black clam Villorita cyprinoides (Family: Cyrenidae), an extractive commercially exploited species with aquaculture importance contributing more than 70% of clam fishery in India, is endemic to the Indian peninsula. Currently, there is very sparse information, especially on the molecular data of Villorita. The present study aims to provide a comprehensive knowledge of mitogenome architecture and assess the phylogenetic status of Cyrenidae. This has resulted in reporting the first complete mitogenome of V. cyprinoides using next-generation sequencing technology. The A+T circular mitogenome was 15,880 bp long, exhibiting 13 protein-coding genes (PCGs) including ATP8 (absent in several bivalves), 22 transfer RNA, and two ribosomal RNA genes residing in the heavy strand in a clockwise orientation and a gene order akin to Corbicula fluminea. The molecular phylogeny inferred from a concatenated multi-gene sequence [14 mitochondrial (12 PCGs, rrnS and rrnL) and two nuclear genes (Histone H3, 18S rRNA)] from 47 representative species of superorder Imparidentia, clustered V. cyprinoides and Cyrenid clams to a single clade supporting the monophyly of Cyrenidae. The subsequent mitochondrial gene order analysis substantiates the close relationship of V. cyprinoides and C. fluminea, analogous to phylogenetic output. The multilocus tree topology calibrated with verified fossil data deciphered the origin and diversification of Cyrenid clams during late Triassic-early Jurassic. The data derived from this study shall contribute remarkably for further insights on cryptic species identification, molecular characterization of bivalve mitogenomes and mitochondrial evolutionary history of genus Villorita. Moreover, complete mitogenome can aid in potential marker development for assessing the genetic health of black clam populations.

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Section: Introductionmentioning

confidence: 99%

“…The use of the species for local consumption, export and protein supplement in shrimp and poultry feed, makes the natives depend mainly on the clam for their sustenance and livelihood 23 . The calcium-rich shell, a by-product in clam fishery is a potential raw material for the manufacture of lime and cement 21 (Fig. 1 h).…”

Section: Introductionmentioning

confidence: 99%

Mitogenomic architecture of the multivalent endemic black clam (Villorita cyprinoides) and its phylogenetic implications

Rahuman

Jeena

Asokan

et al. 2020

Sci Rep

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“…Besides, shells have an immense commercial value, as they are raw materials for the manufacture of cement, calcium carbide, sand-lime bricks, distemper, glass, rayon, paper, sugar, pharmaceuticals, pesticide and poultry feed. The raw shells used in paddy fields and fish farms for neutralizing acid soil, add as slaked lime (Sudha, 1991;Joe, 1993;Kripa and Joseph, 1993;Krishna and Ammini, 2017). Clam habitat also offers many valuable ecological services; clam deposits avoid large-scale soil erosion and stabilize nearby islands (Kripa and Joseph, 1993;Krishna and Ammini, 2017).…”

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confidence: 99%

“…The raw shells used in paddy fields and fish farms for neutralizing acid soil, add as slaked lime (Sudha, 1991;Joe, 1993;Kripa and Joseph, 1993;Krishna and Ammini, 2017). Clam habitat also offers many valuable ecological services; clam deposits avoid large-scale soil erosion and stabilize nearby islands (Kripa and Joseph, 1993;Krishna and Ammini, 2017). The population structure of V. cyprinoides is well known from the Vembanad lake, Kerala, however, the basic population structure of black clam from the other areas of southern India is lacking (Suja and Mohammed, 2012;…”

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confidence: 99%

“…And it also prevents the movement of clam larvae from downstream to the upstream region of the lake. Unregulated salinity gradients and the accumulation of toxic compounds in the lake's upstream area (stagnant water type -prevent the flushing out of accumulated substances) alter the black clam habitat (Pillai, 1991;Laxmilatha and Appukuttan, 2002;Krishna and Ammini, 2017). In 2015, black clam accounted for around 75% of India's total clam production and the clam harvest decreased by 29.72% (CMFRI, 2015).…”

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Geometric morphometric shape and size analysis of endemic black Clam, Villorita cyprinoides (Gray, 1825) (Mollusca: Bivalvia: Cyrenidae) from Koottayi estuary, Kerala, South India

PP,

et al. 2023

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Geometric morphometric allowed us to study the shape, size and asymmetry of the right and left shells of the highly economically important endemic black clam Villorita cyprinoides (Gray, 1825) local population representing the Koottayi estuary, Tirur-Ponnani River, Kerala, South India. As far as we know, nobody has studied the population structure of black clams from southern India and this is the first geometric morphometric analysis of endemic black clam, which provided preliminary information on the population structure of black clam from the Koottayi estuary. Our study area faces a high level of pollution and anthropogenic intervention; apart from that, opens near the Arabian Sea's Barmouth. Using various multivariate statistical methods, we concluded that right and left shell halves are not of the same size and shape; and asymmetry exists. The high level of pollution and anthropogenic effect may be the reason for the existence of fluctuation asymmetry. Our research will serve as baseline information to evaluate the effects of pollution or environmental stress and human interference on endemic species. Evaluation of morphological variations works as a critical tool for future studies such as developmental instability, natural selection, phenotypic adaptation and evolution.

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Integrated Coastal Zone Management practices and cumulative environmental impacts: The case of Vembanad Lake, a tropical estuary in India

Robin,

Hariharan,

Debasis

et al. 2025

Ecohydrology of Kerala

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Population characteristics of Villorita cyprinoides in Vembanad Lake, India

Cited by 5 publications

References 10 publications

Mitogenomic architecture of the multivalent endemic black clam (Villorita cyprinoides) and its phylogenetic implications

Mitogenomic architecture of the multivalent endemic black clam (Villorita cyprinoides) and its phylogenetic implications

Geometric morphometric shape and size analysis of endemic black Clam, Villorita cyprinoides (Gray, 1825) (Mollusca: Bivalvia: Cyrenidae) from Koottayi estuary, Kerala, South India

Integrated Coastal Zone Management practices and cumulative environmental impacts: The case of Vembanad Lake, a tropical estuary in India

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