• 한국해양학회지
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• 제19권2호
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• pp.217-227
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• 1984

1981年에서 1982年 사이 淺水灣 入口에서 小型定置網으로 蒐集한 魚類 群集 의 種組成과 量的 變動을 季節別로 分析하였다. 總 64種의 魚類가 採集되었으며, 小數種이 魚類群集을 優占하였다. 이른 봄에는 漁獲量이 적었으며, 베로라치 (Enedias fangi)와 까나리(Ammodytes personatus)가 優占하였다. 魚類의 種數, 個體數 및 漁獲量은 늦봄에 年中最大값을 보였으며, 이는 魚類들이 産卵 혹은 攝餌를 위하여 灣으로 回族하여 들어오기 때문인 것으로 보인다. 이 시기에는 3種 의 乳泳生魚類, 밴댕이 (Harengula zunasi), 멸치(Engraulis japonica) 및 전어 (Konosirus punctatus)가 優占하였으며, 種類, 個體數 및 어획량이 낮에 비하여 밤에 훨씬 많았다. 여름에는 種數 및 漁獲量이 크게 감소하였으며, 이는 産卵후 成漁가 죽거나, 널리 퍼져 있기 때문인 것으로 보인다. 가을에는 그 해에 태어난 魚類가 再介入하여 어획량이 증가하였다. 이 시기에는 봄, 여름에 産卵한 밴댕이, 멸치 및 전어의 幼漁가 우점하였다. 또, 낮과 밤의 種組成도 큰 차를 보이지 않았다.

• 한국수산과학회지
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• 제36권3호
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• pp.298-305
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• 2003

Seasonal variation in species composition of fish in the estuary of Saemangeum water in the western coast of Korea was determined using seasonal samples collected by an otter trawl from April 2001 to February 2002. Species compositions did not differ significantly among the 4 stations (p>0.05, Wilcoxon signed-rank test). The cumulative number of species and species diversity (H') approached asymptote after four 30-min trawl hauls. Therefore 30-min trawl samples from each of the four stations were pooled to represent each season. A total of 45 species 2758 individuals and 30,346.8 g of fish were collected during the study period. Of the fish collected Leiognathus nuchalis, Synechogobius hasta, Neosalanx jordani, Konosirus punctatus and Chaeturichthys stigmatias predominated in abundance accounting for $68\%$ of the total number of individuals. Seasonal variation of fish abundance showed a similar trend to those of the other western coastal waters of Korea. The resident species were collected only in spring and autumn. Number of species and biomass were highest in summer due to the catch of many migrating species. In winter catch amount was low, and only 7 species were collected.. Brackish water fishes were more abundant in the study area, and Johnius grypotus and Cynoglossus joyneri were not premominated compared to the other coastal waters. This difference in species compositions may be related to the lower salinity in this estuarine habitat than in the other western coastal waters of Korea.

• 환경생물
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• 제28권3호
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• pp.143-149
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• 2010

2007년 3월부터 2009년 1월까지 울산 태화강에 서식 하는 어류의 군집 구조 및 병원체에 대하여 조사하였다. 그 결과 태화강의 3개 조사지점으로부터 채집된 어류는 모두 총 9목 17과 35종이었으며 개체수로서의 우점종은 끄리로서 39%였으며 다음으로 누치가 30.9%였다. 한국고유종은 전체의 20.8%로서 참몰개, 참갈겨니, 기름종개, 꺽지, 동사리의 5종이었다. 누치와 끄리와 같은 대형 어류가 조사지점 2인 삼호교 인근 수역에 계절에 따라 모여들었다. 220개체의 어류에 대한 2종의 어류 병원성 바이러스에 대한 반응은 모두 음성으로 나타났으며, 어류에 병원성이 있다고 알려진 세균은 분리되지 않았다. 어류 병원성 기생충은 총 7종으로 다양하게 나타나지는 않았다. 특히 트리코디나충은 매월 검출이 되었으며 그 감염 밀도도 비교적 높은 편이었다. 그러나 하천의 일정지점에서의 일시적인 어류 과밀현상은 질병에 의한 대량폐사에 직접적인 영향을 주지는 않을 것으로 생각된다.

• 생태와환경
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• 제43권4호
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• pp.459-470
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• 2010

In this study, we analyzed fish tolerance guilds in mainstems and tributaries of 65 streams and rivers arid their relations to water quality using dataset sampled from April to November, 2009. For the study, water quality parameters including biochemical oxygen demand (BOD), electric conductivity (EC), total nitrogen (TN), total phosphorus (TP), ammonia nitrogen ($NH_3$-N), nitrate nitrogen ($NO_3$-N) and phosphate phosphorus ($PO_4$-P) were analyzed in the laboratory and also tolerance ranges in 3 category fishes of sensitive, intermediate, and tolerant species with high abundance were analyzed. According to fish guild analysis, tolerant species was 58% of the total community and the proportion of omnivore species was 63% of the total, indicating a degradation of habitats and water quality. Water quality was shown typical longitudinal gradients from the headwater to the down-river; TN and TP increased toward the down-rivers except for the big point-source area and ionic contents, based on, electric conductivity showed same pattern. Tolerance guild analysis of 9 major species with high abundance indicated that sensitive groups had narrower tolerance range in the water quality than the groups of intermediate and tolerant species. In contrast, tolerant groups including Zacco platypus, Carassius auratus, and Opsarichthys uncirostris amurensis had wider tolerance ranges than the groups of sensitive and intermediate species. Thus, each group was evidently segregated from the tolerance levels. Principal Component Analysis (PCA) employed for the relations of water quality to fish species in each groups suggests that water quality had highest eigenvalues with fish species in the 1st axis of the PCA and nitrogen (TN, $NH_3$-N, $NO_3$-N) and phosphorus (TP) were key components differentiating three groups of sensitive, intermediate and tolerance guilds.

• 한국수산과학회지
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• 제33권4호
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• pp.288-301
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• 2000

가덕도 주변 해역에 서식하는 어류의 종조성과 계절 변동을 알아보기 위해 1998년 1월부터 12월까지 소형 기선저인망을 이용하여 어류를 매월 채집하였다. 조사 기간 동안 채집된 어류는 57과 110종이었다 실양태 (Repomucenus valenciennei), 청멸 (Thryssa kammalensis), 주둥치 (Leiognathug nuchalis), 등가시치 (Zoarces gilli)가 연중 우점하였는데, 이들 어종이 전체 채집 개체수와 생체량의 $57.6{\%}$와 $37.2{\%}를$ 차지하였다. 그 밖에도 청보리멸 (Sillagojaponica), 열동가리돔 (Apogon lineatus), 횐베도라치 (Pholis fangi), 멸치 (Engraulis japonicus), 풀반댕이 (nvssa adeire), 베도라치 (Pholis nebulosa), 붕장어 (Congo.my.iaste.), 꼼치 (Liparis tnnakai), 줄망둑 (Acentrogobius pnaunlii), 문치가자미 (Limanda yokohamae), 도화망둑 (Chaeturichthys hexanema), 풀미역치 (Erisphex pottii), 용서대 (Cynoglossus abbreviatus) 등이 비교적 많이 채집되었다. 채집 종수 및 채집량의 계절 변동을 보면, 봄과 가을에 높은 값을 보였으며 여름과 겨울에 낮은 값을 보였다. 종다양도지수는 가을에 높은 값을 보였다.

• 한국어류학회지
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• 제27권4호
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• pp.310-316
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• 2015

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.

• 수산해양교육연구
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• 제24권1호
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• pp.9-17
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• 2012

The relationship between adult abundance and zoea I (ZI) density of Dungeness crabs was investigated in southeastern Alaska. Commercial harvest data (catch per pot) for male crabs larger than 165 mm in carapace width were collected from the Alaska Department of Fish and Game (ADF&G) management area, district 114 and a subdivision of district 114, 114C from 1996 to 2003. Commercial harvests of Dungeness crabs in the management area varied interannually. Commercial harvests decreased until 2000 but increased beginning in 2001. ZI density was obtained from zooplankton samples collected monthly from sampling stations within the same management district from 1997 to 2004. ZI occurred mostly in May and June, but as late as July in 1997 and 2002. ZI densities increased beginning in 1999. Total densities of ZI were significantly correlated with the commercial harvest data of adult male crabs within the management area, 114C (tens of square kilometers), containing the plankton sampling stations, but were not related to total commercial harvests within the larger geographic management area 114 (hundreds of square kilometers). We suggest that larval density may be an indicator of abundance of adult populations of Dungeness crabs.

• 한국환경과학회지
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• 제30권10호
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• pp.811-820
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• 2021

The population variation of Spanish mackerel (Scomberomorus niphonius) according to its major prey abundance was analyzed using monthly catches of coastal set net fisheries in the southern waters off Gyeongsangnam-do and eastern waters off Gyeongsangbuk-do of Korea from 2006 to 2019. The abundance of Spanish mackerel and its prey species fluctuated almost simultaneously with time lags of +2 to -2 months between the set net fisheries in the southern and eastern waters. The generalized additive model revealed that the abundance of Spanish mackerel was influenced by its prey species such as hairtail and anchovy in southern waters, and common mackerel and horse mackerel in eastern waters. The model deviance explained 49% and 42% of Spanish mackerel abundance in southern and eastern waters respectively. These results suggest that the abundance of Spanish mackerel is affected by seasonal migratory prey fish species in the coastal areas and can be linked to their northerly migration.

• Parasites, Hosts and Diseases
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• 제51권6호
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• pp.703-710
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• 2013

To increase public health awareness for prevention of opisthorchiasis caused by eating raw freshwater fish, the distribution and abundance of Opisthorchis viverrini metacercariae (OV MC) was investigated in freshwater fish obtained from 20 provinces in northeastern Thailand between April 2011 and February 2012. A cross-sectional survey was conducted on 12,890 fish consisting of 13 species randomly caught from 26 rivers, 10 dams, and 38 ponds/lakes. Fish, were collected in each of the rainy and winter seasons from each province. Fish were identified, counted, weighed, and digested using pepsin-HCl. Samples were examined for OV MC by a sedimentation method, and metacercariae were identified under a stereomicroscope. OV MC were found in 6 species of fish; i.e., Cyclocheilichthys armatus, Puntius orphoides, Hampala dispar, Henicorhynchus siamensis, Osteochilus hasselti, and Puntioplites proctozysron from localities in 13 provinces. Among the sites where OV MC-infected fish were found, 70.0% were dams, 23.7% were ponds/lakes, and 7.7% were rivers. The mean intensity of OV MC ranged from 0.01 to 6.5 cysts per fish (or 1.3-287.5 cysts per kg of fish). A high mean intensity of OV MC per fish (>3 cysts) was found in 5 provinces: Amnat Charoen (6.5 cysts), Nakhon Phanom (4.3), Mukdahan (4.1), Khon Kaen, (3.5) and Si Sa Ket (3.4). In conclusion, OV MC are prevalent in natural cyprinid fish, with the infection rate varying according to fish species and habitats.

• 한국어류학회지
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• 제23권1호
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• pp.37-45
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• 2011

진해만 남서부에 출현하는 자치어 종조성의 계절변동을 연구하기 위하여 2009년 1월에서 12월까지 매월 RN80 네트을 이용하여 시료를 채집하였다. 조사 기간 동안 24과 46종의 자치어가 채집되었다. 우점종은 청어(Clupea pallasii), 쥐노래미(Hexagrammos otakii), 전어(Konosirus punctatus), 멸치(Engraulis japonicus), 청베도라치(Parablennius yatabei), 앞동갈베도라치(Omobranchus elegans) 순으로 많이 채집되었는데 이들 6종은 전체 채집개체수의 92.7%를 차지하였다. 어종수, 채집 개체수, 종다양도지수는 뚜렷한 계절 변동을 나타내었다. 종수와 개체수는 각각 7월과 1월에 가장 높은 값을 나타내었다. 주성분분석(PCA)와 상관분석은 군집구조와 우점종들의 출현량이 수온과 유의한 관계가 있음을 보여주었다. 특히, 청어, 쥐노래미, 멸치, 청베도라치의 출현량은 수온과 유의한 관련성이 있었다.