One unusual species,Coiliasp. (Engraulidae, Pisces) from the Yellow Sea

Abstract

Four specimens of unknown Coilia sp. were collected for the first time from the Yellow Sea in 2008 and compared with Coilia mystus and Coilia nasus. Coilia sp. showed similar morphology to C. mystus and C. nasus, but differed in that its tail was considerably shorter. We conducted an analysis of the morphological and genetic characteristics in an effort to clarify the taxonomic position of Coilia sp. In counts and measurements, Coilia sp. were well distinguished from C. nasus by the number of scutes (42Á44 in Coilia sp. vs. 40Á45 in C. mystus vs. 45Á55 in C. nasus), ratio of dorsal base length to head length (43.4Á47.6 vs. 37.9Á47.6 vs. 33.0Á41.0), and eye length to head length (19.2Á20.8 vs. 17.0Á22.4 vs. 13.8Á18.2). In caudal skeleton of Coilia sp., urostyle, hypural and epural bones were not observed; instead of them, caudal fin rays were supported by the last vertebra, neural and haemal spines' extension. The molecular phylogenetic relationship was analyzed using 414 base-pair 12S rRNA mitochondrial DNA sequences. The Kimura-2-parameter distance between Coilia sp. and C. mystus was 0.3%, but was 1.3% between Coilia sp. and C. nasus. Both the neighbor-joining tree and maximum-likelihood tree showed that Coilia sp. are closely clustered with C. mystus. Therefore, our results suggest that the Coilia sp. may be a deformed fish of C. mystus.

Occurrence of Small Scale Blackfish Girella leonina (Perciformes: Kyphosidae) Lacking a Caudal Fin

“…, (Fu et al, 2013), (Shao et al, 2009). (Coilia mystus) (Kwun et al, 2010) , Chaetodipterus faber Micropogon undulatus (Gunter and Ward, 1961), Canthehines macrocerus Meuschenia skottowei (Tyler, 1970), (Oplegnathus punctatus) (Ishiguro and Nishida, 1998) . .…”

“…(Darwinian fitness) (Fu et al, 2013), (Breder, 1953;Gunter and Ward, 1961;Tyler, 1970;Ishiguro and Nishida, 1998;Álvarez-León et al, 2009;Jawad et al, 2010;Kwun et al, 2010;Orlov, 2011;Tyler et al, 2014 1). , (Fig.…”

Genetic Distances between Tailfin Anchovy (Coilia nasus) Populations Analyzed by PCR

“…The tailfin anchovy is an ecologically and biologically very important fish in Korea. The finfish are reproductively (Lee et al, 2003;Jun et al, 2009;Kwun, 2012), morphologically (Kwun et al, 2010;Jiang et al, 2011), ecologically (Baeck et al, 2011), as well as histologically ( Jun et al, 2003) well-documented, but their genetics and/or molecular-biology studies are not comparable to other fish. Therefore, in order to evaluate the exact patent genetic consequence, there is a necessity to understand the genetic traits and composition of this finfish population.…”

Four newly reported ophichthid leptocephali species revealed by mitochondrial 12S rDNA, with implications of their occurrence in Korea

“…Not withstanding, larval identification using morphological method can have much uncertainty because of morphological similarities and ontogenetic change during larval stage (Leiby 1984;Taylor and Watson 2004). Therefore, in recent years, studies on larval identification using molecular method have been abruptly increased (Paine et al 2008;Kwun et al 2010), but only few studies on leptocephalus were conducted (Ji and Kim 2010;Ji et al 2011).…”