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http://dx.doi.org/10.5657/KFAS.2020.0572

Comparison of Morphological Characteristics and Its Parent Species Hybrid Grouper between a Epinephelus moara ♀ and E. lanceolatus ♂  

Park, Jong Yeon (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University)
Kim, Yong Hwi (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University)
Bang, In-Chul (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.53, no.4, 2020 , pp. 572-576 More about this Journal
Abstract
As grouper aquaculture production intensifies worldwide, hybrids are increasingly produced to induce heterosis of traits such as rapid growth and strong environmental adaptability. In this study, we compared the morphological characteristics of a hybrid grouper to those of its parent species Epinephelus moara and E. lanceolatus. The coefficients of external and skeletal traits evaluated using soft X-rays did not differ significantly among groups; however, several patterns were detected among measured traits. The body depth (BD), length of caudal peduncle (LCP), and pre-anal fin length (PAL) of the hybrid were the same as those of E. moara, whereas the pre-pectoral fin length (PPL) and interorbital width (IOW) of the hybrid were the same as those of E. lanceolatus. Traits that did not differ significantly among the three groups included pre-dorsal fin length (PDL), pre-ventral fin length (PVL), length of anal fin (LAF), and length of dorsal fin (LDF), whereas the depth of caudal peduncle (DCP) and snout length (SNL) showed intermediate traits, and eye diameter (ED) was significantly smaller in the hybrid. Therefore, intermediate traits such as DCP and SNL and specific traits such as ED may be used as indices for hybrid classification.
Keywords
Hybrid grouper; Morphology; Hybrid index; Epinephelus moara; E. lanceolatus;
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