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1.
Data on the presence of invasive species are often scarce, especially during the initial period following their introduction,
when population abundance and species detectability are both still very low. In such cases, sporadic sightings in their newly
occupied territory are often the only available information about their presence and distribution. Here, we demonstrate the
potential of using probabilistic models for the assessment of the distribution of newly established invasive species in rivers,
based on their sighting records. We have applied Solow’s equation to the sighting record of the Amur sleeper (Perccottus glenii) in the Danube River, to assess the probable range of its population. The method applied indicated that, at the time when
the sightings have been made (2003–2008), the Amur sleeper population in the Danube most probably extended between the 704.5
and 1,178.5 river km, while it was highly improbable (P < 0.05) that it was present downstream from the 606 river km or upstream from the 1,277 river km. The application of this
approach has, however, to be tested further on a larger number of scenarios and case studies in order to evaluate its reliability.
What this method lacks in complexity, compared to more advanced species distribution assessments, it makes up by its ability
to be easily used and quickly applied for preliminary assessments of the ranges of riverine species. As a result, the proposed
approach might be of interest for scientists and managers dealing with invasive species. 相似文献
2.
Three age groups of the Amur sleeper have been studied: underyearlings (0+), two-year-olds (1+), and three- and four-year-olds
(2+ and 3+). The long-cycle parasites prevalent in all three age groups are the merocercoids of Ophiotaenia europaea, third-stage juveniles of Spiroxys contortus, and metacercariae of Isthmiophora sp. and Prohemistomidae gen. sp. Different age groups of the Amur sleeper have different roles in the life cycle of O. Europaea. Underyearlings are second intermediate hosts of O. europaea, and Amur sleepers aged 1+ and older are parathenic hosts. The alpha-diversity of long-cycle parasites of the Amur sleeper
increases with the age of the host. 相似文献
3.
Seasonal differences in the critical thermal maximum are revealed in Amur sleeper Perccottus glenii at the age of 1+ and 2 years. Maximum values of the critical thermal maximum determined by two criteria (rotation of the
body and immobile gill covers) are registered in the summer, and minimum values of this parameter are observed in the winter.
Maximum thermal resistance is registered at a low water heating rate (0.2–0.4°C/h), and minimum resistance is reported for
a heating rate 5.0–10.5°C/h. The difference between the values of the critical thermal maximum assessed by two criteria reaches
1–2°C. Features of behavior of Amur sleeper are described at different heating rates. Based on the characteristics of thermal
adaptation (critical thermal maximum and optimal temperature for growth), Amur sleeper is similar to warm water eurythermal
species (goldfish Carassius auratus and carp Cyprinus carpio). 相似文献
4.
By J. Grabowska M. Grabowski D. Pietraszewski J. Gmur 《Zeitschrift fur angewandte Ichthyologie》2009,25(4):451-459
The Amur sleeper diet spectrum was investigated in addition to its spatial, seasonal and size-related changes, in order to predict which groups of native prey would be most affected by this exotic predator that has rapidly invaded many Eastern and Central European inland waters in recent decades. In total, 527 Perccottus glenii individuals were collected in four sites in the Włocławski Reservoir (the Vistula River, Baltic basin, Poland). Altogether 50 food categories were identified, including crustaceans, insects, molluscs, annelids, araneids, fishes and amphibians. Most of them were associated with aquatic vegetation, indicating that the Amur sleeper collects its prey from the submerged plants rather than directly from the bottom sediments. Amphipods and chironomid larvae, supplemented by zygopteran larvae and molluscs, composed the main forage base in all studied sites, although their importance was varied. The diet composition differed among P. glenii size-groups. Significant variation was found in numeric abundance of amphipods, chironomid larvae, fish and zygopteran larvae (Kruskal–Wallis P < 0.01). Seasonal changes in the diet were also observed whereby in spring and summer, dipteran larvae and amphipods were prevalent food items; the importance of molluscs and zygopteran larvae increased considerably in September; and fish showed the highest occurrence in June, July and August. The broad diet spectrum of the Amur sleeper indicates that it is a non-selective, opportunistic predator and that several taxonomic groups of native hydrofauna as well as macroinvetebrates and fish may be affected by its presence. The highly flexible feeding strategy undoubtedly favours Amur sleeper expansion in invaded watersheds. 相似文献
5.
Changes in the total content and composition of lipids in yearlings of the Lake Krugloye Amur sleeper depending on their body length during the active feeding period have been analyzed. It is found that fatness of the juvenile Amur sleeper does not change with an increasing body length. The seasonal dynamics of fatness is expressed to a greater degree in fish of the same size. The lipid composition of juvenile specimens of the Amur sleeper varies considerably depending on the length of the body of the fry and the time of observation. The character of the fractional composition of lipids in yearlings of the Amur sleeper with body lengths >25–29 mm in September and October indicates a decline in food supply of the largest specimens of the generation by the end of the active feeding period and their lower readiness for wintering. 相似文献
6.
The Chinese sleeper (Perccottus glenii Dybowski, 1877) in Ukraine: New data on distribution
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I. Kutsokon 《Zeitschrift fur angewandte Ichthyologie》2017,33(6):1100-1107
The Chinese sleeper Perccottus glenii Dybowski, 1877 is one of the most successful alien species in Europe today. This article is a review of the current distribution of the species in Ukraine using published data, own field studies (2005–2016) and collections from museums and colleagues. The Chinese sleeper has been confirmed in the Vistula, Danube, Dniester, Southern Bug and Dnipro river basins, with earlier occurrence (1970s–90s) in the Vistula, Danube and Dniester river basins. As a result, the species is distributed more evenly in these river basins. The Chinese sleeper was first recorded in the Dnipro and Southern Bug river basins in the 21st century; hence, its occurrence is still irregular. Present data suggest that, in some regions, the species could inhabit not only floodplains and bays but also fluvial river sections. 相似文献
7.
草鱼中国土著群体与欧美日移居群体遗传差异的线粒体序列分析 总被引:1,自引:0,他引:1
草鱼是中国的土著鱼类,自20世纪60年代以来已被移居到100多个国家和地区,主要用来控制水草或水产养殖。本研究通过线粒体D-Loop区(764bp)和COII+tRNA基因(719bp)序列分析,了解草鱼的中国土著群体(长江、珠江、黑龙江)和国外移居群体(匈牙利多瑙河、美国密西西比河、日本利根川河)之间以及各地方群体间的遗传差异。结果表明,中国土著草鱼群体的遗传变异高于国外移居群体;分子方差分析(AMOVA)表明,不同草鱼群体的遗传变异主要来自群体内,而不同地域间的差异极少;群体两两间Fst值比较表明,大多数群体之间遗传差异极显著;由TCS构建的单倍型网络结构图显示,长江草鱼群体是最原始的群体,其他水系草鱼均由长江群体演化而来;通过基因流分析发现,匈牙利多瑙河群体和日本利根川河群体来自长江和黑龙江群体,美国密西西比河群体除引自长江、黑龙江水系外,还有部分引自于珠江水系。 相似文献
8.
Differences between the muscle mercury contents in fish from lakes Gusinoye and Karasinoye and the Selenga River may indicate an inconsiderable income of mercury in aquatic ecosystems with atmospheric precipitation, along with a more intensive migration of mercury with the riverine flux. The minimal concentration of mercury (less than 0.15 mg/kg, dry weight) has been registered in the muscles of Amur sleeper from Lake Karasinoye and of Baikal omul from Lake Baikal, while the maximal concentration (1.0–2.3 mg/kg, dry weight) has been revealed in the fish caught in the Selenga River delta (in predatory pike, Amur catfish, and perch, as well as in omnivorous roach and ide). The muscle metal content in dace decreased along the downstream direction. 相似文献
9.
Grabowska Joanna Pietraszewski Dariusz Przybylski Mirosław Tarkan Ali Serhan Marszał Lidia Lampart-Kałużniacka Magdalena 《Hydrobiologia》2011,661(1):197-210
In recent decades, Amur sleeper is one of the most invasive fish species in Eastern and Central Europe. Generally, it is assumed
that success of an invasive species can largely depend on the plasticity of its life-history traits, e.g., indicated by higher
investment in reproduction in the initial stage of its invasion. On the other hand, such energy allocation to production of
gonads should negatively impact somatic growth rate. The aim of this article was to explore this phenomenon in a non-native
population of Amur sleeper inhabiting artificial reservoir on a large lowland river in Central Europe. Through analysis of
the population age structure, sex-dependent growth rate and life-history traits we assessed investment in reproduction and
its possible relationship with growth pattern as well as compared the results with literature data from native and introduced
range. Samples collected monthly from April 2005 to March 2006 were used to estimate sex ratio, GSI, fecundity, eggs diameter
frequency over the year, duration of spawning season, and mode of spawning. Age structure was calculated from scales and the
same data were also used to back-calculate standard length (SL) at age. The population in the Włocławski Reservoir was represented
by eight age groups, and its life span was one of the longest recorded both in its natural range and introduced areas. The
weight–length relationship showed that the Amur sleeper grew isometrically and there was no difference between females and
males. Although the Amur sleeper growth rate was relatively slow in the Włocławski Reservoir, its increment in the first year
of life was comparable to that in other introduced areas and higher than in its natural range. The female age of maturation
(1+) found in the reservoir was earlier than observed in its natural range as well as in most introduced areas (2+, 3+). Female
length at maturation was similar to that reported elsewhere. The back-calculated standard length (SL) of females and males
showed that in the first two age classes (1 and 2) males achieved larger SL than females. Meanwhile, at age 3, 4 and 5, females
were larger than males but these differences were insignificant, except for class 5. For both sexes the average annual increment
of SL decreased with age but in females the increment was always higher than in males (P < 0.05). The growth rate differences between females and males resulted possibly from their unequal investment in reproduction.
Multiple spawning in the Włocławski Reservoir lasted from April to the end of August and was almost 3 months longer than in
other regions. Thus, this higher investment in reproduction displayed by, e.g., earlier maturation of females and longer spawning
season in the Włocławski Reservoir, may contribute to invasive success of Amur sleeper in newly colonized areas; however,
the costs of this strategy result in slower growth in older age classes. 相似文献
10.
Common carp Cyprinus carpio ( n =24) from the upper Danube (wild or feral forms, scaleless varieties) as well as Japanese koi shared the identical mtDNA haplotype (565 bp). In contrast, Amur River carp ( n =5) exhibited unique haplotypes, 1–12 bp divergent from the Danubian one. These results support an Asian origin and single introduction or domestication event leading to the present diversity of common carp in Europe, as well as the ornamental Japanese koi. 相似文献
11.
New findings of lower Amur grayling (Lower Amur grayling) Thymallus tugarinae and Baikal-Lena grayling Th. sp. (Th. baicalolenensis) in the basins of the upper Amur River and Zeya River are reported for 2010?2014. Lower Amur grayling has been registered in the tributaries of Argun River and in the middle stream of Ingoda River. Baikal-Lena grayling has been found for the first time in the headstream of Ingoda River. New data about the distribution of this species in the basin of upper stream of Zeya River are reported; particularly, Baikal-Lena grayling has been found in Okonon Lake; this is the first finding of a representative of Thymallidae family in the alpine lakes of the watershed area of Amur River. In the basins of upper Amur River and Zeya River, the summer ranges of upper Amur grayling Th. grubii grubii and lower Amur grayling overlap to some extent; on the other hand, the ranges of Baikal-Lena grayling and lower Amur grayling are disjoint. During the summer period, upper Amur grayling and Baikal-Lena grayling together inhabit the basin of upper stream of Zeya River, but only Baikal-Lena grayling has been found in the headstream of Zeya River. In the basin of upper Amur River (the headstream of Ingoda River), the joint range of these species is still unknown; the sympatric zone is located in Dzhermoltai River (the basin of Onon River). 相似文献
12.
Synopsis To assess the genetic variation and population structure of wild chum salmon in China, we analyzed microsatellite loci for populations in the Amur, Wusuli, Suifen Current and the Tumen rivers. We evaluated expected heterozygosity with two estimators of genetic differentiation (FST and GST) and Nei’s standard genetic distance. The average expected heterozygosity across the 10 loci was 0.65 in the Wusuli River and the Suifen Current River, 0.64 in the Amur River and 0.66 in the Tumen River, The results of this study show that the recent declines in chum salmon have not led to low levels of genetic variability in China. The proportion of inter-population subdivision among chum salmon was between 5.7 and 6.8%. According to the estimator used, the NJ tree based on Nei’s standard genetic distance indicated that there were two different branches (the Sea of Okhotsk branch and the Sea of Japan branch), the Amur River and the Wusuli River populations were closer, while the Suifen Current River and the Tumen River clustered together. The genetic test for population bottlenecks provided no evidence for a significant genetic signature of population decline, which is consistent with the record of the four populations we have in the last few years. 相似文献
13.
Lei Li Jinfeng Zhang Nianmin Wang Na li HongYu Jin Bo Ma 《Zeitschrift fur angewandte Ichthyologie》2019,35(4):821-824
Amur sturgeon Acipenser schrenckiii Brandt 1869 and kaluga Huso dauricus (Georgi 1775) are critically endangered species with populations showing significant decline from historical levels due to overexploitation, yet little is known about their population structure. Adults are not often captured in the Fuyuan reach of the Amur River, Heilongjiang Province, Northeast China, and the government prioritizes juvenile sturgeon management. This study was conducted to determine the age and length/weight relationships of juvenile Amur sturgeon and kaluga in the Fuyuan reach of the Amur River. We estimated age using pectoral fin spine sections obtained from 65 juvenile Amur sturgeon and 50 juvenile kaluga. We compared the age estimates from two readers, and found 100% between‐reader agreement in 67.7% of the Amur sturgeon and 64.0% of the kaluga. The majority of differences in estimated age were within 1 year. Length/weight relationships (LWR) were calculated, and the LWR of the Amur sturgeon and kaluga were W = 0.0025L3.106 (r2 = 0.966)and W = 0.0022L3.175 (r2 = 0.989), respectively. Our study provides the age structure and LWR in juveniles of two sturgeon species. 相似文献
14.
Andrey P. Shmigirilov Anastassia A. Mednikova Joshua A. Israel 《Environmental Biology of Fishes》2007,79(3-4):383-395
Three Acipenseridae species live in the rivers and marine waters of the Khabarovsk Territory, Russia: Sakhalin sturgeon, Acipenser mikadoi, Amur sturgeon, A. schrenckii, and kaluga, Huso dauricus. We review the general biology and life history of each species, including their historic and current distributions, and
examine current paleogeographic theories to outline the possible origin and evolution of these three species in the Amur River,
Sea of Okhotsk, and Sea of Japan biogeographic province. Apparently, these species have evolved during distinct geologic time
periods, which has reinforced the reproductive isolation of these species although hybridization does occur. They have convergently
adapted to the unique environmental conditions of the Amur River and Russian Maritime regions, and yet developed behavioral
adaptations to reduce competition between species. Sakhalin sturgeon is the least studied species among anadromous sturgeon
in the world. This species is highly migratory and spends the majority of its life in the ocean only returning to natal rivers
to spawn. Amur sturgeon and kaluga are distributed throughout the Amur River basin and the estuary and share many life history
traits. They are both represented by distinct morphs. Additionally, we present size and weight relationships to estimate the
growth of Amur sturgeon and kaluga. All three species have suffered declines in abundance due to over fishing and their contemporary
distributions have contracted compared to their historic ranges. We identify gaps in knowledge and suggest further research
useful for guiding management of each species. 相似文献
15.
Smirnov A. K. Smirnova E. S. Koduhova Yu. V. Karabanov D. P. 《Journal of Ichthyology》2019,59(3):382-388
Journal of Ichthyology - The tolerance of juvenile Amur sleeper Perccottus glenii and perch Perca fluviatilis to the effect of piscivorous predator pike Esox lucius has been studied in experimental... 相似文献
16.
Anna Bothár 《Hydrobiologia》1986,140(2):97-104
Analysis of the population dynamics of Bosmina longirostris (O. F. Müller) was carried out in the River Danube in the years 1981 and 1982. An estimation method of secondary production
elaborated far standing waters was adapted to river conditions. In the River Danube, compared to lakes, standing crop and
production values were smaller, while fecundity, P/B values were larger and turnover time was shorter. Possible reasons for
this are discussed. 相似文献
17.
Aquatic Ecology - Amur sleeper (Perccottus glenii) is currently one of the most invasive fish species in Europe. This inspired our research to identify potential channels of emigration in two... 相似文献
18.
Thomas Friedrich Ralf Reinartz Jrn Gessner 《Zeitschrift fur angewandte Ichthyologie》2019,35(5):1059-1068
All six sturgeon species naturally occurring in the Danube River from the Black Sea (BS) to the upstream reaches in Germany today are under severe pressure and classified as either vulnerable, critically endangered or already extinct in the Danube River Basin (DRB). This sharp decline of populations is the result of two major drivers: habitat alteration and unsustainable harvest. The Danube River Basin can be divided in three functionally separated sections by its hydromorphology and character: The Lower Danube (LD) and BS, now also separated ecologically from the Middle Danube (MD) by two hydropower stations at the Iron Gate gorge, 800 km from the sea, currently restricting the remaining anadromous sturgeon species (A. gueldenstaedtii, A. stellatus, Huso huso) to the LD and BS also restraining migrations of potamodromous species. The Upper Danube (UD) is nowadays disconnected from the approx. 850 km long MD by Gab?ikovo Dam. The UD itself, as well as many tributaries along the Danube, are fragmented by numerous barriers, leaving no more than a total of 300 km free flowing river out of 700 km. Overharvest led to disappearance of most sturgeon species in the UD already in the Middle Ages, with populations in the MD following in the subsequent centuries. Today the potamodromous sterlet (A. ruthenus) still exists in small decreasing populations in the UD and MD basins, where its occurrence is supported by stocking. Most probably the potamodromous ship sturgeon (A. nudiventris) is extirpated in the whole basin. The Danube basin comprises 19 countries, being the most international river basin in the world, rendering coordinated conservation efforts a challenge. Strategic guidelines for the conservation of the Danube sturgeons are available in form of several action plans, but implementation remains insufficient as of yet. This paper attempts an analysis of the potential for sturgeon restoration in the UD and MD basin and highlights the need for concerted approaches when it comes to ex situ actions and reintroductions. 相似文献
19.
We investigated seasonal variation in the diet of hatchery-reared juvenile Amur sturgeon Acipenser schrenckii in the Tongjiang reach of the Songhua River, Northeast China. The results indicated that Amur sturgeon fed mainly on Chironomidae and Ephemeroptera and secondarily on unspecified bony fish, Odonata, and Trichoptera. Diet changed throughout the year, with autumn 2017 and spring 2018 dominated by Ephemeroptera larvae, while summer 2018 prey comprised primarily Chironomidae larvae. Unspecified bony fish were observed at greater frequency in autumn 2017. Amur sturgeon captured in summer contained a greater quantity of Trichoptera larvae compared to those from autumn and spring sampling. Results were consistent with previous reports of Amur sturgeon diet in other areas of its native distribution and suggested that they may be opportunistic feeders throughout the year, although larval Chironomidae and Ephemeroptera appear to be important prey. These results represent the first reported diet composition data for juvenile Amur sturgeon in the lower Songhua River. Results of the study form part of a comprehensive investigation of feeding habits of juvenile Amur sturgeon that provides basic data for study of the biological characteristics of the species. 相似文献
20.
Sturgeon populations in the Danube River have been affected by a combination of hydropower development, over-harvesting, habitat
degradation from agricultural and industrial practices and from urbanization. The effects of these changes have been monitored
on six sturgeon species inhabiting the Danube River. Two of them are resident species, while the other four migrate to the
river for spawning. Atlantic sturgeon (Acipenser sturio) has completely disappeared from this region. Ship sturgeon (Acipenser nudiventris) is very rare in professional fishing catches. Beluga (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), stellate sturgeon (Acipenser stellatus) and sterlet (Acipenser ruthenus) are endangered with different levels of extinction risk. Here, we model the time dependence of the beluga and Russian sturgeon
catch in the Serbian part of the Danube River. Predicted extinction of Russian sturgeon was estimated to fall around the middle
of the century, and for beluga approximately at middle of the millennium. Suggestions for sturgeon conservation measures on
a national level and coordination of all relevant institutions in Serbia are also presented. 相似文献