The Current Status of the Distribution of Introduced Fish in Large River Systems of South Korea

Jang, Min‐Ho; Kim, Jung-Gon; Park, Sung-Bae; Jeong, Kwang‐Seuk; Cho, Ga-Ik; Joo, Gea Jae

doi:10.1002/1522-2632(200205)87:2/3<319::aid-iroh319>3.0.co;2-n

Cited by 40 publications

(31 citation statements)

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“…The occurrence rates of exotic species in all watersheds were lower than that found by Jang et al (2002). Although it is relatively difficult to directly compare rivers, because of variation in river location and the numbers of study sites on different rivers, the overall pattern indicates that exotic species are falling in numbers, indicating (at a minimum) that the number of exotic species may be stabilizing.…”

Section: Status and Conservation Of Fishmentioning

confidence: 99%

Distribution patterns of fish communities with respect to environmental gradients in Korean streams

Yoon

Kim

Byeon

et al. 2011

Ann. Limnol. - Int. J. Lim.

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-Stream development can generate environmental changes that impact fish communities. In temperate streams, the distribution of fish species is associated with environmental gradients. To analyze the relevant factors, large-scale exploration is required. Thus, to evaluate the distribution patterns of fish in Korea, sampling was conducted on a national scale at 720 sites over a 6-week period in 2009. A total of 124 fish species in 27 families were identified; Zacco platypus and Zacco koreanus of the Cyprinidae were the dominant and subdominant species, respectively. Of the species found, 46 (37.1%) were endemic and 4 (3.2%) exotic; of the latter, Micropterus salmoides and Lepomis macrochirus were widely distributed. Upon canonical correspondence analysis (CCA), both altitude and biological oxygen demand (BOD) were highly correlated with CCA axes 1 and 2, respectively. This explained 62.5% of the species-environment relationship. Altitude and stream order were longitudinally related to species distribution. The numbers of both total and endemic species gradually increased as streams grew in size to the fourth-fifth-order, and decreased in sixth-order, streams. Overall, fish communities were stable throughout the entire watershed, whereas some species showed site-specific occurrence patterns due to the paleogeomorphological characteristics of Korean peninsula. However, various anthropogenic activities may negatively affect fish communities. Therefore, both short-and long-term sustainable management strategies are required to conserve native fish fauna.

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Section: Status and Conservation Of Fishmentioning

confidence: 99%

Distribution patterns of fish communities with respect to environmental gradients in Korean streams

Yoon

Kim

Byeon

et al. 2011

Ann. Limnol. - Int. J. Lim.

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“…Chinese minnow (Rhynchocypris oxycephalus) is a small cyprinid fish widely distributed in East Asia, living in cold, running or still, yet well oxygenated waters over gravel substrate, generally inhabiting in stream headwaters with high elevation (Jang et al, 2002;Bogutskaya et al, 2008). This fish usually spawn from May to September when mean water temperature ranges from 11.0 to 13.7°C.…”

mentioning

confidence: 91%

Global climate change will severely decrease potential distribution of the East Asian coldwater fish Rhynchocypris oxycephalus (Actinopterygii, Cyprinidae)

Ming

Zhou

et al. 2012

Hydrobiologia

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Global climate change has been suggested to cause decrease of distribution area of many species. However, this has not been tested for East Asian inland coldwater fish. Chinese minnow (Rhynchocypris oxycephalus) is a small typical coldwater fish, which is endemic to East Asia and generally inhabits stream headwaters. Due to its occurrence in temperate south China, there is growing concern about its future fate in the face of global warming. In this study, we employed maximum entropy approach to analyze how distribution of this species would be impacted by future climate change. We collected data of 310 independent distribution points and 20 environmental variables, and conducted modeling under three general circulation models assuming two gas emission scenarios for 2020s, 2050s, and 2080s. The results showed that the Min temperature of coldest month was the most important climatic variable for potential distribution of the Chinese minnow. Modeling predicted geographical distribution of the Chinese minnow would shrink over time and become much more limited in all the situations especially in South-eastern China, and there would be little suitable habitat left in this region by 2080s. Our results confirm that climate change clearly poses a severe threat to the Chinese minnow, and we suggest that conservation efforts should focus on lower temperature areas within the current range, because these areas will remain relatively cool and may be still suitable for the Chinese minnow even under the most drastic climate change scenarios.

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“…The distribution and abundance of Korean freshwater fishes have been defined (Jang et al 2002;. Within South Korea the main causes of impoverishment of the native fish fauna in river systems are habitat destruction by construction of large dams, weirs and channelisation, together with pointsource and diffuse water pollution (Jang et al 2001), but introduction of exotic fishes also has the potential to act as an additional forcing factor on Korean fish assemblages.…”

Section: Introductionmentioning

confidence: 99%

Diet of introduced largemouth bass in Korean rivers and potential interactions with native fishes

Jang

Joo

Lucas

2006

Ecology of Freshwater Fish

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A dietary analysis of largemouth bass (Micropterus salmoides), an exotic, piscivorous species, was conducted in large South Korean river systems (>third order streams, 31 sites). Micropterus salmoides larger than 100 mm exhibited intense piscivory on native Korean juvenile fishes, with levels of piscivory amongst the highest recorded globally, for native and introduced populations. Largemouth bass exhibited an ontogenetic shift in diet, showing a progressive increase in piscivory with size, typical of this species within its native range but unlike several studies on introduced largemouth bass in Europe and Africa. Sampling of fish communities at the same sites used for diet studies showed that native piscivores and the main food fish species of largemouth bass were significantly less abundant (P ¼ 0.049 and 0.045, respectively) at sites where bass were present than at sites where no bass were recorded. Largemouth bass may pose a threat to the structure of fish assemblages in Korean river systems and further study of their population interactions and how to minimise their spread is needed.

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The Current Status of the Distribution of Introduced Fish in Large River Systems of South Korea

Cited by 40 publications

References 0 publications

Distribution patterns of fish communities with respect to environmental gradients in Korean streams

Distribution patterns of fish communities with respect to environmental gradients in Korean streams

Global climate change will severely decrease potential distribution of the East Asian coldwater fish Rhynchocypris oxycephalus (Actinopterygii, Cyprinidae)

Diet of introduced largemouth bass in Korean rivers and potential interactions with native fishes

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