위내용물 분석과 안정동위원소 분석을 이용한 겨울철 동해 북부 연안에 출현하는 명태 (Gadus chalcogrammus)와 대구 (G. macrocephalus)의 먹이분할 연구

박주면 ( Joo Myun Park ),정해근 ( Hae Kun Jung ),이충일 ( Chung Il Lee ),박현제 ( Hyun Je Park ) 한국어류학회 2022 韓國魚類學會誌 Vol.34 No.2

본 연구는 위내용물 분석과 안정동위원소 (δ¹³C and δ¹⁵N) 분석을 통하여 우리나라 동해 북부 연안에 출현하는 명태 (Gadus chalcogrammus)와 대구 (G. macrocephalus)의 종내 및 종간 먹이자원 분할을 조사하였다. 두 종은 중층성 육식성 어종으로 명태는 저서성 및 중층성 갑각류를 주로 섭식하였고, 대구는 어류를 주로 섭식하였다. 위내용물 분석 결과에 대한 Non-metric multidimensional scaling (nMDS) ordination과 permutational multivariate analysis of variance(PERMANOVA)은 두 종의 종내 및 종간 먹이조성의 차이와 먹이자원 분할을 보여줬다. 안정동위원소 분석 결과 δ¹⁵N 값은 종간 유사하였지만, δ¹³C 값은 대구가 높은 값을 나타내어 두 종간 생태지위 차이를 보여줬다. 명태는 체장 증가에 따라 큰 체장군에서 새우류와 두족류를 더 많이 섭식하는 먹이 전환을 나타냈지만, 대구는 체장군 간 먹이조성이 유사하였다. 안정동위원소 분석에서도 체장군 간 차이를 보였는데, 두 종의 큰 체장군은 작은 체장군에 비해 더 높은 δ¹⁵N 값을 나타낸다. 결론적으로 본 연구는 명태와 대구의 위내용물 분석과 안정동위원소 분석을 통하여 종내 및 종간 먹이 차이와 생태지위 분할의 증거를 보여줬다. This study investigated dietary habits and intra- and inter-specific food resource partitioning of co-occurring walleye pollock (Gadus chalcogrammus) and Pacific cod (G. macrocephalus) from the waters off the north-eastern coast of South Korea using stomach contents and stable isotopes (δ¹³C and δ¹⁵N) analyses. Both species are mesopelagic carnivores that consumed mainly benthopelagic crustaceans, but teleosts were also abundant in the diet of Pacific cod. Non-metric multidimensional scaling (nMDS) ordination and permutational multivariate analysis of variance (PERMANOVA) of dietary data revealed significant intra- and inter-specific dietary differences, i.e., food resource partitioning. Nitrogen stable isotope values (δ¹⁵N) were similar between walleye pollock and Pacific cod, but carbon stable isotope values (δ¹³C) were significant different, suggesting different trophic positioning. Canonical analysis of principal coordinate (CAP) ordination plot further demonstrated that differences in the type and range of prey ingested by the two species contributed such an inter-specific difference in the diet compositions. Ontogenetic changes in diet compositions were evident. As walleye pollock, they preyed more upon carid shrimps and cephalopods, but no such trend was observed in the diets of Pacific cod. While stable isotope values indicated that large-sized specimens of both species were significantly enriched in 15N relative to smaller conspecifics thus supporting these data. Consequently, in this study, both methodologies, i.e., stomach contents and stable isotope analyses, provided evidence of inter- and/or intra-specific dietary segregations and trophic niche partitioning between co-occurring walleye pollock and Pacific cod off eastern Korean waters.

동해 남부 연안해역 통발에서 채집된 어류 군집의 계절변동과 연간변동

박주면 ( Joo Myun Park ),허성회 ( Sung Hoi Huh ) 한국어류학회 2015 韓國魚類學會誌 Vol.27 No.4

본 연구는 동해 남부 연안해역 통발에서 채집된 어류 종조성의 계절 및 연간변동을 조사하였다. 어류 시료는 2005년에서 2008년까지 계절별로 채집하였다. 조사기간 동안 24과에 속하는 32종의 어류가 채집되었다. 우점종은 붕장어 (Conger myriaster), 미역치 (Paracentropogon rubripinnis), 꼼치 (Liparis tanakae), 쌍동가리 (Parapercis sexfasciata), 먹장어 (Eptatretus burgeri), 청어 (Clupea pallasii pallasii)였으며, 이들 6종은 총채집개체수의 91.9%를 차지하였다. 어류 군집의 출현종수, 개체수, 생체량, 다양도는 계절변동을 나타내었는데, 출현종수와 개체수는 2008년 8월에 가장 높았고, 생체량과 다양도는 2005년 8월에 가장 높았다. ANOSIM 분석 결과, 2008년 어류 종조성은 다른 년도와 유의한 차이를 나타내었다. 반면 계절별 채집 종조성은 유의한 차이를 보이지 않았다. The seasonal and interannual variation in the species composition and abundance of the fish assemblage were studied. Fish samples were collected seasonally over 4 year (2005 to 2008) using pots in the southern coast of East Sea. During the study period, a total of 32 fish species belonging to 24 families were collected. The dominant species were Conger myriaster, Paracentropogon rubripinnis, Liparis tanakae, Parapercis sexfasciata, Eptatretus burgeri and Clupea pallasii pallasii, which accounted for 91.9% of the total number of individuals collected. The number of species, number of individuals, biomass, and diversity fluctuated with season. The peak number of species and number of individuals occurred were in August 2008, whereas the biomass was the highest in August 2005 and diversity was in May 2008. The abundance of dominant species also showed some seasonal and interannual changes. A one-way analysis of similarity (ANOSIM) showed that the fish assemblage in 2008 was significantly different from those of 2005, 2006 and 2007, whereas there was no significant difference among seasons over 4 years.

동해 남부 연안에서 출현하는 저어류 군집구조의 변화

박주면 ( Joo Myun Park ),백근욱 ( Gun Wook Baeck ),허성회 ( Sung-hoi Huh ) 한국수산과학회(구 한국수산학회) 2018 한국수산과학회지 Vol.51 No.4

We investigated temporal and depth-related variation in species composition and abundance of the fish assemblage in the southern East Sea. Fish samples were collected seasonally between 2007 and 2008 using a demersal trawl off the southern coast of Korea. We identified 59 fish species belonging to 41 families. The most frequently occurring species was Coelorinchus multispinulosus, followed by Lophius litulon, Acropoma japonicum and Apogon lineatus. The five most abundant species were A. lineatus, A. japonicum, Myctophum nitidulum, Engraulis japonicus and C. multispinulosus, accounting for 87.04% of the total number of individuals collected. The number of species, abundance and diversity fluctuated with sampling location and time. Permutational multivariate analyses of variance revealed that the assemblage structure was influenced by year, season and water depth, with season being the main indicator. These changes were visually emphasized using non-metric multidimensional scaling ordination plots. Fluctuations in assemblage structure were due to differential contributions of the dominant species.

여름철 낙동강 하구역 해빈 쇄파대에서 출현하는 누치(Hemibarbus labeo) 미성어의 위내용물

최희찬,박주면,백근욱,허성회,Choi, Hee Chan,Park, Joo Myun,Baeck, Gun Wook,Huh, Sung Hoi 해양환경안전학회 2016 海洋環境安全學會誌 Vol.22 No.6

본 연구는 여름철 낙동강 하구역 해빈 쇄파대에서 누치 유어의 출현양상, 위내용물 조성, 체장과 주야간 위내용물 조성의 차이를 조사하였다. 시료는 2014년 주야간에 낙동강 하구역 해빈 쇄파대의 2개 정점에서 지인망으로 8월에 채집된 67개체를 이용하였다. 여기서 채집된 개체의 체장은 5.1에서 9.7 cm의 범위를 보였다. 누치는 단각류를 주로 섭식하는 육식성으로 어류였으며, 그 외 어류와 갯지렁이류 그리고 새우류 등을 부가적으로 섭식하였다. 누치는 크기에 따라 식성변화를 보여, 가장 작은 크기군(< 6.4 cm SL)의 개체들은 단각류를 주로 섭식하였던 반면, 체장이 증가할수록 단각류 대신 어류의 비중이 증가하였다. 주야에 따라서는 주간에는 단각류와 갯지렁이류를 주로 섭식하였고, 야간에는 어류를 주로 섭식하였다 The composition of the diet of juvenile barbel steeds, Hemibarbus labeo was studied using 67 specimens collected in August, 2004 from the surf zone of the Nakdong river estuary. The fish examined ranged from 5.1 to 9.7 cm in standard length (SL). Hemibarbus labeo was found to be carnivorous and consumed mainly amphipods, with teleosts, polychaetes, and shrimps following. They showed size-related changes in diet. Small individuals (< 6.4 cm SL) mainly consumed amphipods. As fish size increased, the portion of amphipods consumed decreased, while a reverse trend was evident for teleosts. It was also observed that Hemibarbus labeo consumed more amphipods and polychaetes during the day, while fish served as their main prey during the night.

부산 주변해역에서 출현하는 성대(Chelidonichthys spinosus)의 식성

허성회 ( Sung Hoi Huh ),박주면 ( Joo Myun Park ),백근욱 ( Gun Wook Baeck ) 한국어류학회 2007 韓國魚類學會誌 Vol.19 No.1

거문도 주변해역에서 출현하는 붉은메기(Hoplobrotula armata)의 식성

백근욱 ( Gun Wook Baeck ),박주면 ( Joo Myun Park ),예상진 ( Sang Jin Ye ),정재묵 ( Jae Mook Jeong ),안영수 ( Young Su An ) 한국수산과학회 2012 한국수산과학회지 Vol.45 No.4

The feeding habtis of Hoplobrotula armata were studied using 269 specimens collected in the coastal waters of Geomun-do, Korea. The size of the specimens ranged from 5.6-56.8 cm in total length (TL). H. armata is a canivore that consumes mainly teleosts and decapods (shrimp, crabs and hermit crabs). Its diet also includes gammarid amphipods, cephalopods, polychaetes and copods. Smaller individuals (<20 cm TL) fed mainly on fish, shrimp and crabs. The proportion of shrimp and crabs decreased as body size increased, whereas the consumption of fish gradually increased Fish accounted for almost the entire stomach contents of individuals (larger than 40 cm TL).

어류 수정란(egg) 밀도 측정 장치 개발 및 적용

박종원 ( Jong Won Park ),정해근 ( Hae Kun Jung ),박주면 ( Joo Myun Park ),박흠기 ( Heum-gi Park ),이충일 ( Chung Il Lee ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.9

Information about the density of fish eggs is important to understand the vertical distribution of eggs and survival in early stage, in particular change in egg density is one of major issue in fisheries. This paper describes a practical application of an experimental system for measurement of the fish egg density under laboratory conditions. The device can control the temperature range in each water column, and make different densities at each layer. The density of olive flounder (Paralichthys olivaceus) eggs have ranged from 1,018.49 to 1,020.93 kg/㎥ and were aggregated around the density of 1,020 kg/㎥. The results show that the device is applicable for measuring the fish egg density under laboratory conditions.

낙동강 하구역에 출현하는 청어(Clupea pallasii) 자치어의 식성

최희찬 ( Hee Chan Choi ),박주면 ( Joo Myun Park ),윤석현 ( Seok Hyun Youn ),허성회 ( Sung Hoi Huh ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.4

We examined the feeding habits of larval Clupea pallasii using 148 specimens collected from December 2010 to April 2011 in the Nakdong River estuary, Korea. We found that larval C. pallasii [8.3-26.0 mm NL (notochord length)] are carnivorous, consuming mainly copepods, rotifers, cirripeds, and free-living flatworms (Macrostomida). Their diet also include small quantities of shrimp nauplii, tintinnids, cladocerans, and larval bivalves, among other food sources. To evaluate ontogenetic changes in dietary composition, we split larvae into four size groups: 8-12 mm, 12-16 mm, 16-20 mm, and > 20 mm NL. Rotifers were the most important prey items for the smallest group, but all other groups predominantly consumed copepods. The largest group frequently preyed on rotifers, cirripeds and flatworms, in addition to copepods. Larvae also showed bi-modal feeding, with peaks in the late afternoon and at midnight, wherein the mean number of prey per individual peaked at 1,800-1,900 h.

2006년 고리 주변해역에 출현하는 자치어의 종조성과 출현양상

백근욱 ( Gun Wook Baeck ),박주면 ( Joo Myun Park ),남기문 ( Ki Moon Nam ),허성회 ( Sung Hoi Huh ) 한국어업기술학회 2012 수산해양기술연구 Vol.48 No.3

Species composition and abundance of larval fishes in the coastal waters off Gori in the southeastern Korea were investigated from January to December in 2006. During the study period, 32 larvae species belonging to 20 families were collected. The dominant species were Engraulis japonicius, Hexagrammos agrammus, Sillago japonicus, Acropoma japonicum, Apogon lineatus, and Konosirus punctatus. These six species accounted for 87.0% of the total number of individuals collected. The number of species, number of individuals, and species diversity indices fluctuated by season. The peak numbers of species and individuals occurred in July and May, respectively. Correlation analysis showed that monthly variations in water temperature and salinity could act as an indicators of seasonal variations in the larval fish community structure and abundance of the dominant species; in particular, the abundance of S. japonicus, A. japonicum, and A. lineatus were significantly corrected with the water temperature.

부산 주변해역에서 출현하는 살살치(Scorpaena neglecta)의 식성

허성회 ( Sung Hoi Huh ),박주면 ( Joo Myun Park ),남기문 ( Ki Mun Nam ),박세창 ( Se Chang Park ),박찬일 ( Chan Ll Park ),백근옥 ( Gun Wook Baeck ) 한국어류학회 2008 韓國魚類學會誌 Vol.20 No.2