• 제목/요약/키워드: native fishes

검색결과 53건 처리시간 0.022초

Viruses, Bacteria and Helminths of Invasive Carp: Insights from an In Vitro Assay and a Survey with Native Fishes in a Large Midwestern River

  • Thurner, Kensey;Goforth, Reuben R.;Chen, Shuai;Amberg, Jon;Leis, Eric;Kinsella, John M.;Mahapatra, Cecon;Sepulveda, Maria S.
    • 한국어병학회지
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    • 제30권2호
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    • pp.135-148
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    • 2017
  • Pathogen introductions associated with aquatic invasive species threaten ecosystems and biodiversity worldwide. Bigheaded carps (BHC), including Silver Carp Hypophthalmichthys molitrix, Bighead Carp H. nobilis, and their hybrids, are prolific, invasive pests in central US rivers. However, little is known about pathogen effects on invading BHC or how BHC affect the disease risk profile for native fishes in receiving ecosystems. We therefore conducted, from May 2013-December 2014, a systematic pathogen survey for BHC and native fishes in the Wabash River watershed, Indiana, USA. We found Pseudomonas fluorescens, P. putida, and Salmonella enterica DNA in BHC as well as native fishes, although none of these bacteria were exclusively present in BHC. DNA from other bacterial taxa was detected only in native fishes and Common Carp Cyprinus carpio. No gastrointestinal helminths were detected in BHC, although they were common in most native fishes examined. We also conducted in vitro studies on BHC tissues (skin, gill, fin, and fry) and found high sensitivity to Largemouth Bass virus, viral hemorrhagic septicemia virus, and infectious pancreatic necrosis virus. We conclude that BHC are not heavily burdened by bacteria, viruses and parasites in the invaded study ecosystems, although they do harbor native bacteria and show potential for high sensitivity to endemic viruses.

습지생태계의 공익적 서비스 연구 -1. 자생어류을 이용한 모기유충의 효과적인 생태학적 제어방법 (A Study on the Ecosystem Service of Wetland -1. Effective Biological Control of the Mosquito Larvae using Native Fishes)

  • 정헌모;김해란;유영한
    • 한국습지학회지
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    • 제15권1호
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    • pp.19-24
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    • 2013
  • 토종어류를 이용한 효율적인 생태학적 모기 방제 방법을 제안하기 위해 서산지역에 서식하는 토종어류를 이용하여 모기를 제어할 수 있는 최적 조건을 알아보았다. 어류 종류별에 따른 모기유충 포식률과 온도차에 따른 포식활동의 변화를 알아본 결과, $32^{\circ}C$의 환경에서는 왜몰개가 가장 높은 포식률을 보였고 미꾸라지가 가장 낮은 포식률을 보였다. 반면 낮은 온도의 환경에서는 왜몰개와 얼룩동사리가 가장 빠른 시간에 높은 포식률을 보인 반면, 미꾸라지는 온도와 상관없이 어류 6종 중에 모기유충 포식률이 가장 낮았다. 수심에 따른 어류 종류별 모기유충 포식률은 왜몰개와 참붕어가 수조의 아랫부분에서, 붕어와 얼룩동사리는 수조 바닥부분에서 높은 포식률을 보였고, 미꾸라지는 수조 바닥부분에서 모기유충을 섭식하였다. 그리고 대륙송사리는 수표면에서 95%의 높은 포식률을 보였다. 서로 다른 위치에서 먹이활동을 하는 어류 3종을 선정하여 모기유충 50마리를 포식하는데 걸리는 시간을 측정한 결과, 왜몰개 2마리는 10분, 대륙송사리 2마리는 21분 그리고 미꾸라지 2마리는 45분이 걸렸다. 반면 미꾸라지와 왜몰개를 각각 1마리씩 넣었을 때는 8분, 미꾸라지와 대륙송사리를 넣었을 때는 17분이 걸렸다.

미꾸리 Misgrunus anguillicaudatus (Cypriniformes: Cobitidae)의 난발생 및 자치어 형태발달 (Morphological Development of Eggs, Larvae and Juveniles of the Misgrunus anguillicaudatus (Cypriniformes: Cobitidae))

  • 박재민;유동재;손준혁;한경호
    • 한국수산과학회지
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    • 제55권1호
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    • pp.23-29
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    • 2022
  • This study was carried out to clarify the egg, larvae and juveniles development of Misgurnus anguillicaudatus, and relationships of M. anguillicaudatus and M. mizolepis, Cobitididae Fishes. The adult fishes were collected in Samsan-cheon, Haenam-gun, Jeollanam-do, Korea and their spawning inducement was carried by ovaprim injections. The egg shape was circular and the size was average 1.12 mm. The eggs were hatched at 61 to 72 h after fertilization. The newly hatched larvae had an average 3.23 mm in total length (TL). At 5 days after hatching, the larvae reached to post larval stage and they were 10.3 mm in TL. At 19 days after hatching, it reached to juvenile stage and was 25.3 mm in TL. The egg size of M. anguillicaudatus was almost same as M. mizolepis but the hatching period of M. anguillicaudatus has taken longer. It was possible for interspecific distinguishability of M. anguillicaudatus and M. mizolepis when their larvae reached to juvenile stage by the development of keel-like ridges.

자생종 포식자를 이용한 침입외래종 황소개구리(Rana catesbeiana)의 생태적 제어에 관한 연구 (Ecological Control of Invasive Alien Species, American Bullfrog (Rana catesbeiana) Using Native Predatory Species)

  • 노선호;정진석;유영한
    • 한국환경생태학회지
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    • 제31권1호
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    • pp.54-61
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    • 2017
  • 습지생태계에 심각한 영향을 미치는 침입외래종 황소개구리(Rana catesbeiana)의 생태적 제어를 목적으로 효과적인 생물종을 선발하기 위하여 6종의 토종 포식성 어류와 6종의 조류를 이용하여 황소개구리의 올챙이와 아성체를 대상으로 포식률을 측정하였다. 본 실험에 사용한 어류 중 동자개(Pseudobagrus fulvidraco), 메기(Silurus asotus), 가물치(Channa argus) 3종은 황소개구리의 올챙이와 아성체를 모두 포식하였고, 그 중 전자를 더 선호하였다. 그러나 끄리(Opsariichthys uncirostris), 드렁허리(Monopterus albus), 뱀장어(Anguilla japonica) 3종은 황소개구리의 올챙이와 아성체를 전혀 섭식하지 않았다. 그리고 고니(Cygnus columbianus), 큰고니(Cygnus cygnus), 쇠오리(Anas crecca), 원앙(Aix galericulata), 홍머리오리(Anas penelope), 가창오리(Anas formosa) 등 실험에 사용한 6종의 조류 또한 황소개구리의 올챙이와 아성체를 전혀 먹지 않았다. 결과적으로, 국내 습지생태계에서 토종 물고기를 이용한 침입외래종 황소개구리의 제어가능성을 확인할 수 있었다.

옥정호에 도입된 배스 Micropterus salmoides의 식성 및 어류상에 미치는 영향 (Feeding Habits of an Introduced Large Mouth Bass, Micropterus salmoides (Perciformes; Centrachidae), and Its Influence on Ichthyofauna in the Lake Okjeong, Korea)

  • 고명훈;박종영;이용주
    • 한국어류학회지
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    • 제20권1호
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    • pp.36-44
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    • 2008
  • 2006년부터 2007년까지 옥정호에 도입된 외래어종 배스 Micropterus salmoides를 채집하여 식성을 조사하였다. 채집된 배스의 체장범위는 13~511 mm (n= 419)였다. 배스는 강한 육식성 어종으로 주로 어류를 섭식하였으며 그밖에 수서곤충과 새우류 등을 섭식하였다. 배스는 성장하면서 식성이 변하였는데, 10~20mm는 주로 지각류를 섭식하였고, 30~50 mm은 수서곤충과 소형어류를, 50 mm 이상의 개체는 피라미, 치리, 밀어와 같은 어류를 주로 섭식하였다. 1981년부터 옥정호의 어류상을 분석한 결과, 강한 육식성 어종인 배스의 도입은 옥정호 토착종의 다양도와 출현비율의 감소를 초래하는 것으로 판단된다.

양식 메기의 라이소자임 활성 및 항 균력에 미치는 오배자 추출물의 투여 효과 (Effect of Dietary Supplementation with Galla rhois Extract on Lysozyme and Antibacterial Activity of the Cutured Catfish (Silurus asotus))

  • 김진도;이남실;최혜승;김경덕;조혜인
    • 환경생물
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    • 제33권4호
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    • pp.476-483
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    • 2015
  • We are aim to evaluate lysozyme and antibacterial activity of cultured catfish, Silurus asotus, that fed supplementally with Galla rhois extracts for eight weeks. Lysozyme activity in the spleen and serum of administrated group was higher than not administrated group, but in mucus of the lysozyme activity was no regular than other organ. The lysozyme activity of the spleen, kidney, serum of administrated fishes were increased after 2 weeks and that was highest after 8 weeks. Ht and GLU in serum of administrated fishes were gradually increased but GOT was decreased after 8 weeks. There is no significant differences in HB (Hemoglobin) and TP (Total Protein) each groups. Furthermore, there is no pathohistological changes of kidney and liver of tested fishes. The cumulative survival rates of administrated group after intraperitoneal injection of Aeromonas veronii with $6.5{\times}10^6cfu\;mL^{-1}$ was presented 33% in 9 days. As the Results, Galla rhois extracts has any beneficial effects for immunity elevation and antibacterial activity in catfish, Silurus asotus.

Analysis of the Effectiveness of Controlling the Number of Ecosystem Disturbance Fish Species Using the Native Carnivorous Fish Species of Korea

  • Lee, Kwang Yeol;Lee, Han Kyu;Lee, Jae Yong;Choi, Jae Seok
    • Journal of Forest and Environmental Science
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    • 제34권1호
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    • pp.66-70
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    • 2018
  • Preliminary investigation and analysis of the effectiveness of controlling the number of ecosystem disturbance fishes residing in Togyo reservoir using the native carnivorous fish species were performed. The data were collected from August 2011 to November 2016. The release of native carnivorous fish species was carried out from the end of May, 2012 to the end of July, 2016, considering fishing ban period of Siniperca scherzeri. The comparative abundance of Lepomis macrochirus was found to be 12.8% in the first year and increased a little bit after releasing the native carnivorous fish. However, it decreased to 3.9% in the last year showing a value of less than 5%. On the other hand, the Micropterus salmoides populations tended to increase after the release of native carnivorous fish species. This seems to be the result of the segregation of habitat by interspecific competition with S. scherzeri. The M. salmoides moved from inside of the lake to edges, and to influent tributaries. Stable isotope analysis showed that Channa argus had the highest levels of nutrition, S. scherzeri and M. salmoides were in competition, and L. macrochirus was used as a feed source for released species. Changes of the fish community in the Togyo reservoir was represented by the rank abundance curves based on the results of the fish fauna. As a result, the fish group in incoming tributaries are somewhat disturbed after the release of the native carnivorous species. Similarly, the fish group in the reservoir were disturbed as well but it's gradually stabilizing afterwards. Therefore, the control of the ecosystem disturbance species using the native carnivorous fish of Korea is effective and helps to stabilize the fish community in the lake.

한국산 놀래기과 어류의 분류학적 검토 (Taxonomical Review of the Korean Labroidei (Teleostei: Perciformes))

  • 김병직
    • 한국어류학회지
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    • 제21권sup1호
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    • pp.74-74
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    • 2009
  • The perciform suborder Labroidei comprising six families (Cichlidae, Embiotocidae, Pomacentridae, Labridae, Odacidae, and Scaridae) are characterized by having the specialized pharyngeal jaws for food processing, i.e., united fifth ceratobranchials and upper pharyngeal jaw articulating with the basicranium via diarthroses (Stiassny and Jensen, 1987). They usually inhabit in the most tropical and subtropical seas and comprise about 235 genera and roughly 2,274 species worldwide (Nelson, 2006). Concerning the Korean labroid fishes, Mori (1952) had listed 18 genera and 26 species belong to four families in his check list of Korean fishes since Jordan and Metz (1913) firstly reported six genera and seven species in only two families (Embiotocidae and Labridae). Chyung (1977) added two species, Tilapia mossambica and Cirrhilabrus temmincki, to Mori’s list and also classified them into three suborders, i.e., Embiotocina (containing only Embiotocidae), Pomacentrina (Cichlidae and Pomacentridae), and Labrina (Labridae and Scaridae). Subsequently, Lee and Kim (1996) reviewed the Korean labroidfishes taxonomically resulting in 22 genera and 32 species in five families with some taxonomical modifications including a new Korean record. It is remarkable to be added many new Korean recordsto the pomacentrids or the labrids for recent 10 years (Koh et al., 1995; Yoo et al., 1995; Koh et al., 1997; Myoung, 1997; Choi and Kim, 2000; Choi et al., 2002; Kim and Go, 2003). Recently, Kim et al. (2005) briefly described all members of the Korean Labroidei with a color photograph or a figure, recognizing 27 genera and 42 species in five families. In the present study, the current taxonomical status of the Korean labroid fishes including distributional features is summarized based both on specimens collected from the Korean waters and on literature survey to provide bio-information of the Korean native fish species. As a result, the Korean labroid fishes totally consist of 27 genera and 44 species in five families, that is, Cichlidae (1 species), Embiotocidae (3), Pomacentridae (15), Labridae (22), and Scaridae (2). They distributed mainly in the coastal waters of the South Sea, Korea, however, most pomacentrids or labrids occur in the coastal waters of Jeju Island only, although some species were observed in their larval or juvenile stages only from coastal waters of the island. Interestingly, several species are expanding their distribution north to Ulreung and Dok islands in the East Sea, Korea lately.

춘천호의 어류상과 군집구조 (Ichthyofauna and Fish Community Structure in Chuncheon Reservoir)

  • 최재석
    • 환경생물
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    • 제23권2호
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    • pp.173-183
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    • 2005
  • 2003년 8월부터 2004년 4월까지 춘천호의 어류군집 구조를 조사한 결과는 다음과 같다. 조사된 어류는 총 13과 41종 10,821개체이었다. 한국고유종은 어름치 (H. mylodon), 줄납자루 (A. yamatsutae), 가는돌고기 (P. tenuicorpa), 참중고기 (5. variegatus wakiyae), 얼룩동사리(O. interrupta) 등 16종$(39.0\%)$이었다. 우점종은 빙어 (H. olidus) $30.7\%$, 아우점종은 누치 (H. labeo) $14.7\%$였고, 우세종은 피라미 (Z. plarypug) $10.6\%$, 갈겨니 (Z. temminckii) $9.7\%$, 큰입우럭 (M. salmoides) $4.8\%$, 밀어 (R. brunneus) $4.3\%$등이었다. 채집된 어종들의 생체량은 누치(H. labeo) $34.63\kg$, 빙어 (H. olidus) 19.01kg, 잉어 (C. carpio) 12.77kg, 끄리 (O. uncirostris amurensis) 11.28kg, 피라미 (Z. platypus) 8.04kg, 백련어 (H. molitrix) 5.80kg, 큰입우럭(M. salmoides) 4.62kg등의 순으로 나타났다. 춘천호에서 확인된 도입종은 모두 7종이었고, 이 중 떡붕어 (C. cuvieri), 백련어 (H. molitrix), 큰입우럭 (M. salmoides)은 외래도입종이며 뱀장어 (A. japonica), 빙어 (H. olidus), 산천어 (O. masou masou), 꾹저구 (C. urotaenius)는 국내 다른 하천으로부터 이입된 종이다.

만경강의 담수어류 및 외래어종의 분포 (Study of Freshwater Fish Fauna and Distribution of Introduced Species of Mankyeong River, Korea)

  • 이완옥;김경환;김종화;홍관의
    • 한국어류학회지
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    • 제20권3호
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    • pp.198-209
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    • 2008
  • 서해로 유입되는 만경강에 대한 어류상과 어류군집을 조사한 결과 총 14과 63종의 담수어류를 채집하였으며, 이중에 우점종은 Zacco platypus (27.7%)이었고, 아우점종은 Zacco koreanus(11.3%)로 나타났다. 한국고유종은 23종(36.5%)이 출현하였고, 멸종위기야생동 식물에 속하는 종은 Pseudopungtungia nigra, Liobagrus obesus 등 2종이었다. 만경강의 지류별 우점종은 전주천은 Zacco koreanus, 고산천 소양천은 Zacco platypus, 삼천천은 Tridentiger brevispinis이었고, 만경강 본류는 Carassius auratus로 안정된 군집구조를 보이고 있었다. 도입된 외래종은 Carassius cuvieri, Micropterus salmoides, Lepomis macrochirus 등 3종이 출현하였다. 이중 강한 육식성인 Micropterus salmoides는 분포지역이 확대되면서 중 하류의 정수지역에 널리 분포함에 따라 이곳에 주로 서식하는 납자루아과 어류와 고유종을 비롯한 소형 어류의 개체수와 분포에 직접적인 영향을 주고 있었다.