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서해 태안반도 연안에서 오터트롤에 채집된 저서생물의 종조성 및 계절변동
정경숙 ( Gyeong Suk Jeong ),차병열 ( Byung Yeul Cha ),임양재 ( Yang Jae Im ),권대현 ( Dae Hyeon Kwon ),황학진 ( Hak Jin Hwang ),조현수 ( Hyun Su Jo ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.3
To investigate specie composition and seasonal variation of demersal organisms in the coastal waters off the Taean peninsula, otter trawl surveys were conducted from April 2010 to January 2011. A total of 75 species were collected including 44 species of Pisces, 19 species of Crustacea, 6 species of Cephalopoda, 4 species of Gastropoda, and I spe-cies each of Bivalvia and Echinoidea. The dominant species in each season were Palaemon gravieri in spring, Cha-rybdis bimaculata in summer, Loligo japonica in autumn, and Crangon hakodatei in winter. The number of species, individuals and biomass were highest in autumn and lowest in winter. The diversity index was highest in summer and lowest in winter. The dominance index was highest in winter and lowest in summer. The richness index was highest in autumn and lowest in winter. The evenness index was highest in summer and lowest in autumn. A cluster analysis showed that demersal organisms were divided into two groups; spring and winter organisms (Group 1) and summer and autumn organisms (Group 2). We detected a significant difference (P<0.05) between these groups, mainly owing to Platycephalus indicus, Repomucenus koreanus, and Paralichthys olivaceus within Pisces: Trachysalambria curvi-rostris, Metapenaeopsis dalei, P. gravieri and C. hakodatei within Crustacea: and L. japonica within Cephalopoda.
태안 바다목장 해역에서 새우조망에 어획된 수산생물의 종조성 및 군집구조
박준 ( Jun Park ),조현수 ( Hyun Su Jo ),임양재 ( Yang Jae Im ),차병열 ( Byung Yeul Cha ),권대현 ( Dae Hyeon Kwon ),류동기 ( Dong Ki Ryu ),황학진 ( Hak Jin Hwang ) 한국어업기술학회 2013 수산해양기술연구 Vol.49 No.3
Species composition and seasonal variation of aquatic organism in the marine ranchig ground of Taean, Korea were investigated using shrimp beam trawl from January to December 2010. A total of 99 species, 5,355,816ind./㎢ and 84,697㎏/㎢ of aquatic organism were collected. Among them, fish include 9 orders 33 families 54 species, crustaceans include 2 orders 15 families 30 species, cephalopods consist of 3 orders 4 families 5 species, gastropods include 2 orders 3 families 4 species, echinoidea sp. include 1 order 2 families 2 species, bivalves were composed of 2 orders 2 families 2 species, and holothuroids include 1 family 1 order. According to the dominants by month, Palaemon gravieri was dominant in January, Cynoglossus joyneri was dominant in February, March, and June, and Hexagrammos otakii was dominant, in July. And Oratosquilla oratoria was dominant echinoidea sp. was dominant in April, May, and August and in September, October, November, and December. Cluster analysis based on species composition of the 38 most common species showed that the species were separated into 5 different groups. Group A was composed of species which were abundant in spring and summer, group B was composed of year-round residents, and group C was composed of species which were abundant in autumn.
김기현 ( Ki Hyun Kim ),김진수 ( Jin Soo Kim ),최종덕 ( Jong Duck Choi ),허민수 ( Min Soo Heu ),김민지 ( Min Ji Kim ),조현수 ( Hyun Su Jo ),차병열 ( Byung Yeul Cha ),김현정 ( Hyeon Jeong Kim ),정경숙 ( Gyeong Suk Jeong ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.3
This study was conducted to compare quality characteristics of imported skate rays. The moisture content was higher in imported skate rays than in domestic mottled skate, while the protein content displayed a contrasting pattern. From measurements of the volatile basic nitrogen content, pH, viable cell counts, and urea and ammonia contents, the freshness of skate rays imported from Chile, Canada and Uruguay was considered to be inferior to domestic mottled skate, while the freshness of skate rays imported from the USA was similar. The measurement of physicochemical properties revealed that four kinds of imported skate rays were of inferior quality, as compared to domestic mottled skate.
흑산도 근해연승어업의 참홍어 (Raja pulchra) 어획 특성
조현수 ( Hyun Su Jo ),황학진 ( Hak Jin Hwang ),권대현 ( Dae Hyeon Kwon ),정경숙 ( Gyeong Suk Jeong ),최광호 ( Kang Ho Choi ),차병열 ( Byung Yeul Cha ),임양재 ( Yang Jae Im ) 한국어업기술학회 2011 수산해양기술연구 Vol.47 No.4
Catches, CPUE, fishing season, disc width composition and fishing ground were studied to rebuild skate ray, Raja pulchra resource by the offshore longline fishery in Heuksan-do, Korea. Annual catches and CPUE of skate ray were increased from 2003 to 2010 (CPUE: from 2007 to 2010) continuously. The main fishing season of the skate ray was from December to next May. Disc width at 50% maturity for Raja pulchra by sex were estimated to be 65.83cm, 57.01cm by female and male respectively. The range of disc width was 22.3-112.0cm and the average disc width was 66.9cm, 60.0cm by female and male of Raja pulchra respectively during 2007-2010. Annual average of disc width of female skate ray was decreased from 2007 to 2010. The fishing grounds were formed from the coastal water off Hong-do to the coastal water off Gyeogyeolbiyeol-do, Korea. The center of fishing ground in October was formed in the northwestern coastal water off Gyeogyeolbiyeol-do and separated from that of the other months.
한국 연근해 황아귀 , Lophius litulon (Jordan) 의 성숙과 산란
박영철,차형기,차병열 한국수산자원학회 1999 한국수산자원학회지 Vol.2 No.-
Maturation and spawing of the yellow goosefish, Lophius litulon was investigated based on the samples captured in Korean waters from January 1994 to June 1997. Gonadosomatic index began to increase in January, and reached maximum between February and April. After spawing it began to decrease from May. Fecundity was directly proportional to the size of the female, with the clutch size varying from 369,570 eggs in the smallest female(TL=52.25cm)to 1,874,560 eggs in the largest (TL=90.25cm), and the matured eggs ranged from 600 ㎛ to 800㎛ in diameter. Total length and age at maturity were substantially different between sexes, which were 48.5cm and 3.5 years for females and 34.7cm and 2.3 years for males. Annual reproductive cycles of this species could be divided into six successive stages : immature stage, nucleolus stage, yolk vesicle stage, vitellgenic stage, ripe stage and spent stage. Sex ratio (♀:♂) was 62:38 on average but during spawing season females appeared to be more abundant than the average value, accounting for 66~81% of the total.