<p class="TitleMain">Differentiation of two <em>Chlorophthalmus </em>species <em>Chlorophthalmus corniger </em>(Alcock, 1894) and <em>C. acutifrons </em>(Hiyama, 1940) based on <a name="_Hlk50746452">otolith morphometry</a></p>
Online Publishing @ NISCAIR
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Authentication Code |
dc |
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Title Statement |
<p class="TitleMain">Differentiation of two <em>Chlorophthalmus </em>species <em>Chlorophthalmus corniger </em>(Alcock, 1894) and <em>C. acutifrons </em>(Hiyama, 1940) based on <a name="_Hlk50746452">otolith morphometry</a></p> |
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Added Entry - Uncontrolled Name |
Nikki, R Aneesh Kumar, K V Oxona, K Rajeeshkumar, M P Bineesh, K K Midhun, S H Manjebrayak, H Saravanane, N Sudhakar, M |
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Uncontrolled Index Term |
Andaman Sea, Chlorophtalmus, Deep-sea fishes, Otoliths |
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Summary, etc. |
<p class="Abstract"><span lang="EN-GB">A comparative morphometric analysis of otoliths was done to understand the major morphometric characters responsible for differentiating two species of Green-eyes (<em>Chlorophthalmus corniger</em> and <em>C. acutifrons</em>) which is one of the dominant fish groups caught in the deep-sea trawling during the exploratory surveys as well as in the by-catch of trawlers targeting deep-sea shrimps at a depth range of 300 – 500 m in the Indian waters. A total of 53 </span><span lang="EN-GB">intact, right </span><span lang="EN-GB">otoliths (25 and 28 for <em>C. corniger</em> and <em>C. acutifrons</em>, respectively) were considered for the morphometric analysis to differentiate species collected from Andaman Sea. The study extracted four </span><span lang="EN-GB">otolith morphometric measurements and five shape indices measured from the otoliths using image analysing software including otolith weight. The otolith morphometric parameters and shape indices showed significant relationship with the fish size were scaled with standard length to remove the influence of fish size from the data. Principal component analysis using scaled otolith morphometric measurements indicated that the first two axes described 84.78 % and 11.80 % of variation, respectively. The PC1 differentiated the species based on ellipticity and otolith weight followed by area and perimeter. <em>C. acutifrons</em> is differentiated from their congener with a more elliptic, heavy otolith with more otolith surface area. One-way PERMANOVA confirmed significant difference in otolith morphology between the species. Present study confirmed the suitability of otolith morphometric analysis in differentiating <em>Chlorophthalmus</em> species which are quite inevitable</span><span lang="EN-GB"> for taxonomic studies as well as for the better understanding of the species resolution in diet studies.</span></p> |
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Publication, Distribution, Etc. |
Indian Journal of Geo-Marine Sciences (IJMS) 2022-09-30 01:10:05 |
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Electronic Location and Access |
application/pdf http://op.niscair.res.in/index.php/IJMS/article/view/66571 |
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Data Source Entry |
Indian Journal of Geo-Marine Sciences (IJMS); ##issue.vol## 50, ##issue.no## 06 (2021) |
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Language Note |
en |
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