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Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp

There are four species of mud crabs within the genus Scylla, and most of them live sympatrically in the equatorial region. Apart from a report in Japan about the finding of a natural Scylla hybrid more than a decade ago after the division of genus Scylla into four species by Keenan, Davie & Mann...

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Autores principales: Fazhan, Hanafiah, Waiho, Khor, Quinitio, Emilia, Baylon, Juliana C., Fujaya, Yushinta, Rukminasari, Nita, Azri, Mohammad Farhan Darin, Shahreza, Md. Sheriff, Ma, Hongyu, Ikhwanuddin, Mhd
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6944125/
https://www.ncbi.nlm.nih.gov/pubmed/31915566
http://dx.doi.org/10.7717/peerj.8066
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author Fazhan, Hanafiah
Waiho, Khor
Quinitio, Emilia
Baylon, Juliana C.
Fujaya, Yushinta
Rukminasari, Nita
Azri, Mohammad Farhan Darin
Shahreza, Md. Sheriff
Ma, Hongyu
Ikhwanuddin, Mhd
author_facet Fazhan, Hanafiah
Waiho, Khor
Quinitio, Emilia
Baylon, Juliana C.
Fujaya, Yushinta
Rukminasari, Nita
Azri, Mohammad Farhan Darin
Shahreza, Md. Sheriff
Ma, Hongyu
Ikhwanuddin, Mhd
author_sort Fazhan, Hanafiah
collection PubMed
description There are four species of mud crabs within the genus Scylla, and most of them live sympatrically in the equatorial region. Apart from a report in Japan about the finding of a natural Scylla hybrid more than a decade ago after the division of genus Scylla into four species by Keenan, Davie & Mann (1998), no subsequent sighting was found. Thus, this study investigates the possible natural occurrence of potential hybridization among Scylla species in the wild. A total of 76,211 individuals from mud crab landing sites around the Malacca Straits, South China Sea and Sulu Sea were screened. In addition to the four-purebred species, four groups (SH 1, n = 2, 627; SH 2, n = 136; SH 3, n = 1; SH 4, n = 2) with intermediate characteristics were found, mostly at Sulu Sea. Discriminant Function Analysis revealed that all Scylla species, including SH 1 - 4, are distinguishable via their morphometric ratios. The most powerful discriminant ratios for each character and the top five discriminant ratios of males and females were suggested. The carapace width of SH 1 males and females were significantly smaller than pure species. Based on the discriminant ratios and the description of morphological characters, we hypothesize that the additional four groups of Scylla with intermediate characteristics could be presumed hybrids. Future work at the molecular level is urgently needed to validate this postulate.
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spelling pubmed-69441252020-01-08 Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp Fazhan, Hanafiah Waiho, Khor Quinitio, Emilia Baylon, Juliana C. Fujaya, Yushinta Rukminasari, Nita Azri, Mohammad Farhan Darin Shahreza, Md. Sheriff Ma, Hongyu Ikhwanuddin, Mhd PeerJ Aquaculture, Fisheries and Fish Science There are four species of mud crabs within the genus Scylla, and most of them live sympatrically in the equatorial region. Apart from a report in Japan about the finding of a natural Scylla hybrid more than a decade ago after the division of genus Scylla into four species by Keenan, Davie & Mann (1998), no subsequent sighting was found. Thus, this study investigates the possible natural occurrence of potential hybridization among Scylla species in the wild. A total of 76,211 individuals from mud crab landing sites around the Malacca Straits, South China Sea and Sulu Sea were screened. In addition to the four-purebred species, four groups (SH 1, n = 2, 627; SH 2, n = 136; SH 3, n = 1; SH 4, n = 2) with intermediate characteristics were found, mostly at Sulu Sea. Discriminant Function Analysis revealed that all Scylla species, including SH 1 - 4, are distinguishable via their morphometric ratios. The most powerful discriminant ratios for each character and the top five discriminant ratios of males and females were suggested. The carapace width of SH 1 males and females were significantly smaller than pure species. Based on the discriminant ratios and the description of morphological characters, we hypothesize that the additional four groups of Scylla with intermediate characteristics could be presumed hybrids. Future work at the molecular level is urgently needed to validate this postulate. PeerJ Inc. 2020-01-03 /pmc/articles/PMC6944125/ /pubmed/31915566 http://dx.doi.org/10.7717/peerj.8066 Text en ©2020 Fazhan et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Aquaculture, Fisheries and Fish Science
Fazhan, Hanafiah
Waiho, Khor
Quinitio, Emilia
Baylon, Juliana C.
Fujaya, Yushinta
Rukminasari, Nita
Azri, Mohammad Farhan Darin
Shahreza, Md. Sheriff
Ma, Hongyu
Ikhwanuddin, Mhd
Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp
title Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp
title_full Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp
title_fullStr Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp
title_full_unstemmed Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp
title_short Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp
title_sort morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of scylla spp
topic Aquaculture, Fisheries and Fish Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6944125/
https://www.ncbi.nlm.nih.gov/pubmed/31915566
http://dx.doi.org/10.7717/peerj.8066
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