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한국 남해에 출현하는 만새기(Coryphaena hippurus)의 식성
정재묵,최정화,임양재,김정년,Jeong, Jae Mook,Choi, Junghwa,Im, Yang-Jae,Kim, Jung Nyun 한국수산과학회 2017 한국수산과학회지 Vol.50 No.5
Feeding habits of dolphinfish Coryphaena hippurus, were analyzed. Fish samples were collected by using a purse seine, fishing and set net in the southern sea of Korea from January to December 2015. The size of C. hippurus ranged from 23.8 to 127.4 cm in fork length. The species with the highest percent index of relative importance (%IRI; the most important prey taxa) in the diets of C. hippurus were teleosts and cephalopod, including Engraulis japonicus, Thamnaconus modestus and Trachurus japonicus, Loligo edulis was the most frequently consumed cephalopods. Coryphaena hippurus also ate small amounts of amphipods and carid shrimp. The dietary compositions of C. hippurus was not significantly different among size classes or seasons (ANOSIM, P>0.05). As body size of C. hippurus increased the mean number of prey per stomach (mN/ST) tended to decrease, but the opposite trend was evident for mean weight of prey per stomach (mW/ST). The mN/ST and mW/ST also significantly varied with season (one-way ANOVA, P<0.05).
한국 남해 가덕도 주변해역에 출현하는 어류의 종조성과 계절변동
정재묵 ( Jae Mook Jeong ),박주면 ( Joo Myun Park ),허성회 ( Sung Hoi Huh ),예상진 ( Sang Jin Ye ),김현지 ( Hyeon Ji Kim ),백근욱 ( Gun Wook Baeck ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.6
Seasonal variations in species composition and abundance of the fish assemblages in the coastal waters off Gadeok-do were determined using monthly sample collection by a small otter trawl in 2010-2011. Of a total of 65 fishes collected, the dominant species were Leiognathus nuchalis, Clupea pallasii, Thryssa kammalensis, Engraulis japonicus, Repomucenus valenciennei, Sillago japonica,Trachurus japonicus, Pennahia argentatus, Okamejei kenojei, Cynoglossus joyneri, Pholis fangi, Pleuronectes yokohamae,and Zoarces gillii. These 13 fishes accounted for 92.8% of the total number of individuals collected. The number of fish species,number of individuals, biomass, and species diversity indices fluctuated with the seasons. The peak number of fishes occurred in April, whereas the biomass of fishes was highest in August. The numbers and biomass of fishes were lower in February corresponding with the low temperatures, and diversity indices were lower in January than in any other month.
순천 상내리 갯골에 출현하는 농어(Lateolabrax japonicus) 치어의 식성
정재묵 ( Jae Mook Jeong ),김현지 ( Hyeon Ji Kim ),예상진 ( Sang Jin Ye ),염시동 ( Si Dong Yoem ),박종혁 ( Jong Hyeok Park ),백근욱 ( Gun Wook Baeck ) 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.2
During the study periods, total 143 individuals of Lateolabrax japonicus were collected. Body length (BL) range was 2.0.11.8 cm. Empty stomach occurred in 8.4%. The most abundant prey was copepods. Among copepods, Tigriopus japonicus was the most abundant prey appeared 32.1 in %F. Next important prey was shrimps and mysids. The results of analysis in ontogenetic changes, main prey of two small size classes (2.0.3.9 cm, 4.0.5.9 cm) were copepods. Thereafter, copepods percentage was decreased, but shrimps, mysids, fishes percentage was increased by increasing body length from 8.0 cm< size class.
정재묵 ( Jae Mook Jeong ),박주면 ( Joo Myun Park ),허성회 ( Sung Hoi Huh ),김현지 ( Hyeon Ji Kim ),백근욱 ( Gun Wook Baeck ) 한국어류학회 2015 韓國魚類學會誌 Vol.27 No.1
주둥치의 위내용물 분석에 이용된 개체는 총 350개체로 가덕도 주변해역에서 2010년 10월부터 2011년 9월까지 매월 채집하였다. 주둥치의 체장범위는 3.0~9.8 cm를 보였다. 주둥치는 주로 요각류와 게류 유생, 새우류 유생, 갯지렁이류 등을 섭식하는 육식성 어류로 확인되었다. 그 외에 난바다곤쟁이류, 단각류, 이매패류 유생, 복족류 유생 등도 발견되었지만, 그 양은 많지 않았다. 주둥치는 성장함에 따라 주요 먹이생물을 전환하였는데 3~5 cm 사이의 개체들은 요각류를, 5~7 cm 사이의 개체들은 게류 유생과 새우류 유생을, 8~10 cm의 개체들은 갯지렁이류를 주로 섭식하였다. 체장이 증가함에 따라 먹이생물의 무게는 유의하게 증가하였다. The diet composition of Leiognathus nuchalis were studied using 350 specimens col-lected from October 2010 to September 2011 in the coastal waters of Gadeok-do, Korea. L. nuchalis was carnivorous feeder that consumed mainly copepods, crab larvae, and shrimp larvae. Its diet also included small quantities of polychaetes, amphipods, euphausiids, bivalve larvae, and gastropod larvae. The size of L. nuchalis ranged from 3.0 to 9.8 cm in body length (BL). L. nuchalis underwent an ontogenetic dietary shift. 3~5 cm size individuals fed mainly on copepods. 5~7 cm size individuals fed mainly crab larvae and shrimp larvae. 8~10 cm size individuals fed mainly polychaetes. The size increases, the weight of food organisms are constantly increased.
한국 남해안에 출현하는 방어(Seriola quinqueradiata) 치어 및 유어의 식성
정재묵 ( Jae-mook Jeong ),황강석 ( Kang-seok Hwang ),송세현 ( Se-hyun Song ),김희용 ( Hee-yong Kim ),박정호 ( Jeong-ho Park ),이정훈 ( Jung-hoon Lee ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.5
The feeding habits of juvenile and young Seriola quinqueradiata, which were collected by a hand net and set net in coastal waters of the South Sea during the period from June to August 2014 and 2015, were analyzed. The size range of juveniles was 4.9-10.9 cm FL, and that of young S. quinqueradiata was 11.0-20.4 cm FL. Important prey items in the diets of juveniles were euphausiacea and copepoda, dominated by the Euphausia sp., Paracalanus sp. and Calanus sinicus while the diets of the young consisted mainly of pisces, dominated by Engraulis japonicus, Trachurus japonicus. Stomach content compositions differed significantly among body size levels in both the juveniles and young (ANOSIM, P<0.05). With increasing size, the mN/ST constantly decreased while the mW/ST constantly increased (one-way ANOVA). Graphical analysis of the diet composition showed that juvenile S. quinqueradiata are generalized feeders, young is a specialized feeders characterized by strong individual feeding specialization.
가덕도 주변해역에 출현하는 홍어(Okamejei kenojei)의 식성
정재묵 ( Jae Mook Jeong ),김현지 ( Hyeon Ji Kim ),백근욱 ( Gun Wook Baeck ),예상진 ( Sang Jin Ye ),허성회 ( Sung Hoi Huh ) 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.2
The feeding habits of Okamejei kenojei were studied using 242 specimens collected from October 2010 to September 2011 in the coastal waters of Gadeok-do, Korea. O. kenojei was carnivorous feeder that consumed mainly shrimps, crabs, and fishes. Its diet also included small quantities of stomatods, cephalopods, amphipods. The size of O. kenojei ranged from 10.4 to 47.4 cm in total length (TL). O. kenojei showed ontogenetic dietary shift. <15.0, 15.0-19.9 cm size classes fed mainly on shrimps and amphipods. 20.0-24.9 cm size class fed mainly shrimps and crabs. Thereafter, shrimps and crabs were decreased with ontogenesis while fishes and cephalopods were increased. Increasing size, the mN/ST were constantly decreased, but mW/ST were constantly increased.
정동훈(Jeong, Dong Hoon),정재묵(Jeong, Jae Mook) 한국지적학회 2012 한국지적학회지 Vol.28 No.1
In this study, we want to find a way to use cadastral information and to promote utilization and distribution services, according to varied information-oriented environment. The aim is to seek for desirable direction of development before build spatial-information service. It can be achieved by designing and realizing the web-system for the simple attribute data such as parcel number and land categories rather than graphic information. The well-known web service systems are analyzed to effectively distribute the cadastral data. The way for obtaining nationwide cadastral data and renewing data has been studied. Also, the way for effective content building and delivery has been suggested, in order to improve cadastral service quality and to increase earnings. 본 연구에서는 변화된 정보화 환경에 맞추어 지적정보의 이용 및 활용과 유통서비스의 추진을 다각도로 모색하였다. 도형정보보다는 지번데이터, 지적연계정보와 같은 단순 속성정보의 서비스를 위한 웹시스템을 설계하고 시범구현 함으로써 공간정보서비스의 구축 및 관리에 앞서 개발방향을 모색하는 것을 목적으로 한다. 국내외의 대표적인 공간정보 웹서비스 시스템을 분석하였으며 지적정보를 효과적으로 유통할 수 있는 시범시스템을 설계하고 구현하였다. 연구를 통해, 전국적인 지적데이터 확보와 지속적인 자료갱신방안에 대하여 고찰하였으며 대한지적공사 지적측량서비스의 질적 향상과 공사의 수익증대를 위한 효과적인 콘텐츠 구축 및 제공방안을 제시하였다.
정동훈(Jeong, Dong-hoon),신윤호(Shin, yun-ho),정재묵(Jeong, Jae-mook) 한국지적정보학회 2012 한국지적정보학회 학술발표대회 논문집 Vol.2012 No.12
정보화 기술의 발전과 함께 국민생활과 밀접한 공간정보 활용에 대한 수요는 지속적으로 증가되고 있다. 따라서 다양한 공간정보의 구축, 관련 기술의 개발과 더불어 국민에게 필요한 공간정보 서비스 콘텐츠 개발과 적용방안 등이 제안되어야 한다. 따라서 본 연구에서는 국민에게 다가설 수 있는 공간 정보 활용 환경을 만들고 활용성을 높이기 위해 국민 생활의 편의성을 높일 수 있는 활동을 중심으로 서비스 콘텐츠를 개발하고자 하였으며, 국내외 현황조사와 수요조사를 바탕으로 6개 서비스 콘텐츠를 도출하고 정의하였다.
진해만 동부 주변해역에 출현하는 청베도라치(Parablennius yatabei) 후기자어의 소화관 내용물 조성
김현지,정재묵,박종혁,백근욱,허성회,Kim, Hyeon Ji,Jeong, Jae Mook,Park, Jong Hyeok,Baeck, Gun Wook,Huh, Sung-Hoi 한국수산과학회 2017 한국수산과학회지 Vol.50 No.5
The feeding habits of post-larval Yatabe blenny Parablennius yatabei (2.0-9.8 mm SL) were examined on the basis of 158 individuals collected from June to October in the coastal waters of eastern Jinhae Bay, South Korea. Based on the index of relative importance (IRI), post-larval P. yatabei fed 94.4% on copepods and 5.6% on tintinnids. The preference of post-larval P. yatabei for copepods to other prey items results from ontogenetic changes. The dietary percentage of copepods increased as fish size increased and tintinnids became less important. The feeding rate of post-larval P. yatabei was consistent at all times of day.
한국 연안해역에 출현하는 황돔(Dentex tumifrons)의 성숙과 산란
최유정 ( Yu Jeong Choi ),최정화 ( Jung Hwa Choi ),이해원 ( Hae Won Lee ),정재묵 ( Jae Mook Jeong ),김현지 ( Hyeon Ji Kim ),김도균 ( Do-gyun Kim ),진수연 ( Suyeon Jin ),백근욱 ( Gun Wook Baeck ) 한국수산과학회(구 한국수산학회) 2020 한국수산과학회지 Vol.53 No.1
In this study, we examined the maturation and spawning of yellowback seabream Dentex tumifrons using samples collected by monthly bottom trawling in Korean coastal waters from January to December 2018. We analyzed monthly changes in gonadosomatic index (GSI), maturity stage, histology, fecundity, and total length at group maturity. Spawning occurred in May and October. Fecundity varied with total length as F=1.3754TL<sup>3.2664</sup>, with a range of 1,220 to 155,625 eggs per female. At group maturity, 50%, 75%, and 97.5% estimates of female total length were 18.4, 20.5, and 25.3 cm, respectively.