Maeng Jin Kim

Two Unrecorded Species of the Snapper (Perciformes: Lutjanidae) Collected from Jeju Island, Korea

Two unrecorded species of the snapper, Lutjanus malabaricus (296.0 mm standard length [SL]) and L. stellatus (350.0 mm SL) belonging to the family Lutjanidae, were first collected from the western coastal waters of Jeju Island, Korea. L. malabaricus is characterized by having a dark marking on the upper half of the caudal peduncle, a band of vomerine teeth that does not protrude posteriorly at the middle, and nine anal soft rays. Compared to its Korean relative, L. malabaricus is distinguishable by having rows of scales that run obliquely in the dorsal-posterior direction above the lateral line (vs. parallel to the lateral line in L. argentimaculatus). L. stellatus can be identified by the absence of wavy blue lines on the head (vs. many blue lines in L. rivulatus) and presence of a white spot above the lateral line (vs. a black blotch on the lateral line in L. rivulatus). We propose new Korean names, “Jin-hong-tung-dom” and “Huin-jeom-tung-dom,” for L. malabaricus and L. stellatus, respectively.

Species composition and variation of catches by a set net in the coastal waters of Gyudeok, Jeju island

연안은 일반적으로 먹이 생산력이 높아 다양한 생물의산란 , 서식 및색이장으로 이용되는 해역으로서 정착성및회유성 어종을 포함한 다양한 생물상이 나타났다 .연안역은 지역에 따라 수심 , 조석 변화 , 수온 , 염분 및해수유동 등해양환경 특성의 차이를 갖으며 , 이러한 환경특성은 수산생물에 영향을 주어 지역마다 독특한 수산생물의 군집구조를 갖는다 (Kwak and Huh, 2007; Goand Cho, 1997). 특히 , 제주도 주변 해역은 대마난류수 ,황해난류수 , 중국대륙연안수 , 황해저층냉수 , 한국 남해안연안수 , 혼합수 등여러 이질 수괴의 영향을 받아 복합적인 해양환경을 나타났다 (Choi et al., 2003). 이러한복합적인 해양 환경은 제주도 연안의 어획량과 수산생물의 종조성에 영향을 미친다 (Yoo et al., 1998; Cha etal., 2001).제주도 정치망어업은 마을어업으로써 제주도 지역어획량의 약3% 를차지하고 있으며 , 마을 연안에 설치되기 때문에 제주도 연안 어종의 변화를 관찰하는 데용이하다 . 지금까지 제주도 연안에서 수행된 정치망 어장에출현하는 수산생물의 군집구조에 관한 연구는 한림연안의 어획량 변동 (Kim etal., 1999), 제주도 연안 평대 ,구엄 , 두모 및강정에서의 어획량 변동 및어기 (Cha et

First Record of a Gaper Champsodon longipinnis (Perciformes: Champsodontidae) from Korea

This is the first report of Champsodon longipinnis (Champsodontidae) collected from Korea. The specimen (100.9 mm in standard length) was caught by a bottom trawl in the coastal waters off Busan, Korea. This species is characterized by the following morphological traits: body with small denticulate scales except abdomen around pelvic fin base; posterior end of maxilla extending beyond margin of eye; dark pigmentation on most of the first dorsal fin, upper half of the first to the fourth soft ray of the second dorsal fin, and partial upper lobe of caudal fin. We add C. longipinnis to the Korean fish fauna and suggest a new Korean name, “Jeom-ak-eo-chi,” for the species.

Molecular Phylogenetic Status of Korean Hemiculter Species

We investigated the molecular phylogeny and genetic differences among local populations of Korean Hemiculter fishes based on their mitochondrial cytochrome b gene sequences. Our results indicated that Hemiculter leucisculus populations in China were clearly divided into two groups. The first group (Group 1) included the populations of the Yangtze River and its surrounding areas (including the Qiantangjiang, Lingjiang, Jiulongjiang, and Minjiang rivers); the second group (Group 2) contained local populations from southern China (including the Nanliujiang, Zhujiang, Wanquanhe, Qianjiang, and Nandujiang rivers). The Korean Hemiculter eigenmanni differed in its cytochrome b gene sequence by 0.6-1.0% from the Chinese H. leucisculus (Group 1), which inhabited the Yangtze River and its surrounding areas, suggesting they were phylogenetically close and likely to be the same species. The Korean H. leucisculus differed from the Chinese H. leucisculus (both Groups 1 and 2) by 8.1-9.5%, indicating a very distant phylogenetic relationship; however, the Korean H. leucisculus differed from Hemiculter bleekeri by only 0.5-0.7%, showing intraspecific nucleotide differences. We conclude that the taxonomic relationship between the Korean H. leucisculus and H. bleekeri requires further investigation using type specimens.

Morphological Characteristics of Laemonema nana (Moridae) Collected from the Southern Coastal Waters of Korea

Six adult fish of Laemonema nana, belonging to the family Moridae, were collected in a bottom trawl in the southern coastal waters of Korea. These specimens were characterized by having 46-52 second dorsal fin rays (vs. 57-67 for Lotella phycis and 68 for Physiculus japonicus), two pelvic fin rays (vs. 9 for L. phycis and 6-7 for P. japonicus), and lateral line descending abruptly below the anterior part of the second dorsal fin.

First Record of the Stichaeid Fish Chirolophis saitone (Perciformes: Stichaeidae) from Korea

One specimen of Chirolophis saitone, belonging to the family Stichaeidae, was collected by a bottom trawl in the southern area of the Yellow Sea. The present specimen was characterized by 52 dorsal fin spines, 38 anal fin spines, a caudal fin with four vertical dark bands and an orbital region with three pairs of branched cirri. We propose a new Korean name, “Jak-eun-goe-do-ra-chi”, for C. saitone.