Seasonal habitat utilization and movement patterns of the threatened Brachymystax lenok tsinlingensis in a Korean river

Yoon, Ju-Duk; Kim, Jeong-Hui; Jo, HyunBin; Yeom, Min-Ae; Heo, Woo-Myung; Joo, Gea‐Jae; Jang, Min‐Ho

doi:10.1007/s10641-014-0254-7

Cited by 13 publications

(11 citation statements)

References 36 publications

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“…However, despite this shared haplotype, most of the genetic differentiation for B. lenok was distributed among basins (Froufe et al, 2008;Liu, Kunag, Tong, & Yin, 2011;Xia et al, 2006), which indicated large-scale, intrabasin gene flow within these vast, unfragmented river systems. However, B. lenok was the only species to demonstrate isolation by distance within both river basins, which is in line with the expectation of a reduced dispersal ability compared to the larger sized H. taimen (Yoon et al, 2014;Gilroy et al, 2010;Kaus et al, 2017).…”

Section: Genetic Population Structure and Conservation Priorities Fsupporting

confidence: 84%

Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major river basins

Kaus

Michalski

Hänfling

et al. 2019

Ecology and Evolution

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Mongolia's salmonids are suffering extensive population declines; thus, more comprehensive fisheries management and conservation strategies are required. To assist with their development, a better understanding of the genetic structure and diversity of these threatened species would allow a more targeted approach for preserving genetic variation and ultimately improve long‐term species recoveries. It is hypothesized that the unfragmented river basins that have persisted across Mongolia provide unobstructed connectivity for resident salmonid species. Thus, genetic structure is expected to be primarily segregated between major river basins. We tested this hypothesis by investigating the population structure for three salmonid genera (Hucho, Brachymystax and Thymallus) using different genetic markers to identify evolutionarily significant units (ESUs) and priority rivers to focus conservation efforts. Fish were assigned to separate ESUs when the combined evidence of mitochondrial and nuclear data indicated genetic isolation. Hucho taimen exhibited a dichotomous population structure forming two ESUs, with five priority rivers. Within the Brachymystax genus, there were three B. lenokESUs and one B. tumensisESU, along with six priority rivers. While B. tumensiswas confirmed to display divergent mtDNA haplotypes, haplotype sharing between these two congeneric species was also identified. For T. baicalensis,only a single ESU was assigned, with five priority rivers identified plus Lake Hovsgol. Additionally, we confirmed that T. nigrescens from Lake Hovsgol is a synonym of T. baicalensis. Across all species, the most prominent pattern was strong differentiation among major river basins with low differentiation and weak patterns of isolation by distance within river basins, which corroborated our hypothesis of high within‐basin connectivity across Mongolia. This new genetic information provides authorities the opportunity to distribute resources for management between ESUs while assigning additional protection for the more genetically valuable salmonid rivers so that the greatest adaptive potential within each species can be preserved.

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Section: Genetic Population Structure and Conservation Priorities Fsupporting

confidence: 84%

Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major river basins

Kaus

Michalski

Hänfling

et al. 2019

Ecology and Evolution

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“…The mean home range for B. lenok in the Eroo River was close to ten times larger than what was previously described for B. tsinlingensis in a Korean River, where radio-tagged individuals were found to have a mean home range of 2.14 ± 1.92 km, with maximum tracked movements of 8.17 km (Yoon et al, 2015). Although being considerably smaller than B. lenok home ranges in Mongolia, a number of issues (i.e.…”

Section: Longitudinal Movementsmentioning

confidence: 41%

“…This period falls within the recognised spawning time for B. lenok, which has been reported to be in May in the Eg-Uur River, Mongolia (Esteve & McLennan, 2008), and between April and May in the Nakdong River, South Korea (Kim & Park, 2002). In South Korea, B. tsinlingensis stayed at the spawning grounds for 14-21 days before returning downstream (Yoon et al, 2015). The length of time each B. lenok remained in a tributary was highly variable, with the shorter, faster trips of 4 and 5 days likely undertaken exclusively for spawning, while the longer visits of 37 and up to 78 days could be related to additional summer feeding opportunities or thermal/ hydrological refuge.…”

Section: Longitudinal Movementsmentioning

confidence: 99%

“…However, a detailed knowledge of this species' spatial ecology remains largely unknown, with only a single study being conducted on the re-described Brachymystax tsinlingensis Li 1966 (Xing et al, 2015) reported as B. lenok tsinlingensis in the Nakdong River, South Korea. In that study, the spring and winter movements and habitat utilisation of 51 individuals were monitored over multiple years, with the maximum home range detected for a mature individual being 8.17 km in spring and 4.13 km in winter (Yoon et al, 2015). While these results were reportedly influenced by road and dam construction, as well as the close proximity of the release locations to suitable spawning sites and the infrequent relocation intervals (Yoon et al, 2015), they still provide an initial understanding of the spatial requirements within the Brachymystax genus.…”

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confidence: 99%

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Migration and movement profiles of a potadromous fish (Brachymystax lenok Pallas 1773) in a highly connected river system (Mongolia)

Kaus

Büttner

Karthe

et al. 2017

Ecology of Freshwater Fish

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Understanding a species' spatial and temporal movements along with the way these shift under extreme environmental conditions is vital for developing scientifically sound conservation and management strategies. The aim of this research was to describe and quantify the seasonal migration patterns and fine-scale movement profiles of Brachymystax lenok, a threatened, potadromous salmonid that inhabits the highly connected, boreal river basins of Siberia and northern Asia. During this study 21 mature individuals were monitored over a 15 month period in the upper Eroo River basin, Mongolia, using passive acoustic telemetry. Mean (±SD) B. lenok home ranges were 19.1 ± 15.1 km (median = 11.5 km), with maximum longitudinal movements detected > 45.3 km. Two periods of increased movements were identified; the first in late summer/early autumn when 10 B. lenok moved into deeper, overwintering pools, with the second period occurring in late spring and early summer when nine B. lenok were detected entering the surrounding tributaries. Diel activity and depth typically increased during daylight hours followed by decreased activity or resting periods in shallower river sections at night. These results highlight the need to maintain a high level of river connectivity and adequate fishing season closures by implementing and enforcing an expansive spatiotemporal management plan that can better protect and recover the Mongolian B. lenok populations. Such measures should be transferable to other threatened, potadromous fish species residing throughout the world's boreal river basins. K E Y W O R D S acoustic telemetry, Brachymystax lenok, Mongolian fish fauna, potadromous fish, seasonal movements, spatial ecology

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“…Pairwise genetic distances of Brachymystax tsinlingensis compared to all congeners and outgroups. "Brachymystax tsinlingensis" has also been recorded in South Korea (Choi et al 2003;Jang et al 2003;Yoon et al 2014), and the genetic divergence between B. tsinlingensis and Brachymystax sp. Korea also showed a close relationship between these populations (Fig.…”

Section: Brachymystax Tsinlingensis Brachymystax Lenokmentioning

confidence: 98%

Revalidation and redescription of Brachymystax tsinlingensis Li, 1966 (Salmoniformes: Salmonidae) from China

Xing¹,

Lv²,

Ye³

et al. 2015

Zootaxa

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Brachymystax tsinlingensis Li, 1966 is revalidated and redescribed. It can be distinguished from all congeners by the following combination of characteristics: no spots on operculum; gill rakers 15-20; lateral-line scales 98-116; pyloric caeca 60-71. Unique morphological characters and genetic divergence of this species are discussed. This species has a limited distribution in several streams of the middle part of the Qinling Mountains in China. Methods for management and protection of B. tsinlingensis need to be re-evaluated.

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Seasonal habitat utilization and movement patterns of the threatened Brachymystax lenok tsinlingensis in a Korean river

Cited by 13 publications

References 36 publications

Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major river basins

Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major river basins

Migration and movement profiles of a potadromous fish (Brachymystax lenok Pallas 1773) in a highly connected river system (Mongolia)

Revalidation and redescription of Brachymystax tsinlingensis Li, 1966 (Salmoniformes: Salmonidae) from China

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