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백근욱,Baek, Geun-Uk 대한석유협회 1985 석유와 에너지 Vol.1985 No.8
이 자료는 연세대학교 대학원 정치학과에 재학중인 백근욱씨의 석사학위논문을 전재한 것이다. 이논문은 지금까지 별로 알려지지 않은 중동석유에 대한 소련의 이해관계와 정책방향을 이해하는데 좋은 자료가 될 것으로 사료된다. <편집자주>
백근욱,박주면,Hiroaki Hashimoto 한국통합생물학회 2011 Animal cells and systems Vol.15 No.4
Feeding ecology was compared among the three tonguefishes Cynoglossus abbreviatus, C. joyneri and C. robustus,collected from Seto Inland Sea, Japan, from June 2000 to May 2001. They are benthivores, consuming mainly gammarid amphipods, shrimps, crabs, gastropods, bivalves and ophiuroids. C. abbreviatus consumed greater proportions of ophiuroids whereas C. joyneri and C. robustus ate more amphipods and shrimps. While C. abbreviatus consumed mostly ophiuroids in all size classes, the diets of C. joyneri and C. robustus showed ontogenetic changes in feeding habits; smaller individuals of C. joyneri and C. robustus consumed gammarid amphipods, whereas larger C. joyneri ate shrimps and gastropods, and larger C. robustus fed mainly on gastropods, crabs, bivalves and polychaetes. Cluster analysis based on diet similarities emphasized that the three Cynoglossus species could be categorized on a size-related basis into three feeding groups: smaller C. joyneri and C. rubustus (<25 cm TL) could be classified as group A, and the larger of them (>25 cm TL) as group B, whereas C. abbreviatus was categorized as group C. This means that some degree of resource partitioning can occur among the three Cynoglossus species. The seasonal changes in the diets were also significant for the three Cynoglossus species.
Maturation and Spawning of Robust Tonguefish (Cynoglossus robustus (Soleidae; Teleostei)
백근욱,김재원 한국수산과학회 2004 Fisheries and Aquatic Sciences Vol.7 No.3
We examined the ovaries of 312 robust tonguefish (Cynoglossus robustus) collected each month from January to December 2001, off the coast of Yeosu, Korea.The samples were used to investigate robust tonguefish reproductive activity. Monthly changes in the gonadosomatic indexindicated that spawning peaked between June and August. Fish size at first spawning was 15-19 cm total length (TL). Over 50% of female fish 25-29cm TL were sexually mature, and this rose to 100% for female fish 35-39 cm TL. The tonguefish spawned four or more times during the spawning season. Most females commenced spawning in their second year. The relationship between total length (cm TL) and fecundity (F) was F=528646Ln(TL)-1E+06.
Mass Mortality of Doctor Fish (Garra rufa obtusa) Caused by Citrobacter freundii Infection
백근욱,김지형,카시아노 초레스카,데니스 고메즈,신상필,한지은,박세창 한국임상수의학회 2009 한국임상수의학회지 Vol.26 No.2
In this paper, we described a case of mass mortality of doctor fish from a private fish hatchery farm in Korea with a history of abnormal swimming behavior, diffuse bleeding on the skin and fins and sudden death caused by fish pathogenic bacteria, Citrobacter freundii. Twelve moribund fish fingerling samples were submitted to College of Veterinary Medicine, Seoul National University in October 2008 for diagnostic examination. Diagnostic results showed that the morphological and biochemical properties of the bacteria isolated from the moribund fish were C. freundii. The remaining diseased fish from the hatchery farm were given treatment based on our recommendation and successfully recovered.