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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 남해에 출현하는 가고시마샛멸(Argentina kagoshimae)의 섭식생태
정재묵,이승종,백근욱 한국수산과학회 2022 한국수산과학회지 Vol.55 No.5
We analyzed the diet composition of smallmouth argentine Argentina kagoshimae, which were collected via bottom trawl in the South Sea during February, April, August, and October 2021. Their size range was 8.1–21.4 cm total length. A. kagoshimae are mesopelagic carnivores, mainly consuming benthopelagic Euphausiacea and Caridea crustaceans. Polychaetes were the second largest prey component in their diet, which also included small quantities of copepods, amphipods, and arrow worms. Stomach content compositions substantially differed among body size levels in A. kagoshimae. The results of non-metric multidimensional scaling ordination and permutational multivariate analysis of variance of dietary data revealed no significant dietary differences. The results of a graphical analysis of the diet composition showed that A. kagoshimae are specialized feeders characterized by strong individual feeding specialization.
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 ( Jaemook Jeong ),유준택 ( Joontaek Yoo ),김희용 ( Heeyong Kim ),이선길 ( Sunkil Lee ),고우진 ( Woojin Go ),김영혜 ( Yeonghye Kim ) 한국수산과학회(구 한국수산학회) 2015 한국수산과학회지 Vol.48 No.5
Species composition of the fish in the coastal waters of Jindo was determined using monthly sample collection by a gape net with wings in 2014. Of a total of 41 fishes collected, the dominant species were Engraulis japonicus, Thryssa kammalensis, Sardinella zunasi, Leiognathus nuchalis, Amblychaeturichthys hexanema, Neosalanx anderssoni, Acanthogobius flavimanus. The former three species were the migratory species and the other four species were the resident species. These 7 fishes accounted for 99.6% of the total number of individuals collected. Monthly species composition did not show a clear seasonal trend. The peak number of individuals occurred in May, lowest in November. Fish were divided into four groups by the cluster analysis.
정재묵 ( Jaemook Jeong ),유준택 ( Joontaek Yoo ),김희용 ( Heeyong Kim ),이선길 ( Sunkil Lee ),고우진 ( Woojin Go ),김영혜 ( Yeonghye Kim ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.5
The species composition of bycatch species in the coastal waters of Yeosu were determined by monthly sample collection using a gape net with wings in 2014. Of a total of 32 fishes collected, the dominant species were Ammodytes personatus, Conger myriaster leptocephali, Sebastes inermis, Trichiurus lepturus, Thryssa kammalensis, Leiognathus nuchalis, Syngnathus schlegeli, Thryssa adelae and Hexagrammos otakii. These 9species accounted for 95.2% of the total number of individuals collected. Most of the fish caught were juveniles and small fishes. Based on the results of multidemensional scaling (MDS) analysis, the bycatch fishes were divided into five group.