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Fig. 5 in The Distribution Of The Invasive Fish Amur Sleeper, Rotan Perccottus Glenii Dybowski, 1877 (Osteichthyes, Odontobutidae), In Latvia
Fig. 5. The location of records of Perccottus glenii in Latvia and catchments basins: 1. Sventaja river basin; 2. Bartas-Liepajas lake basin; 3. Saka river basin; 4. Venta river basin; 5. Irve river basin; 6. Lielupe river basin; 7. Nemunas river basin; 8. Daugava river basin; 9. Gauja river basin; 10. Salaca river basin; 11. Emajegi river basin; 12. Veļkaja river basin baseins; 13. Baltic Sea small rivers' basins (the basic map of catchments basins from http://www.upes.lv/k-a-r-t-e/, open access).
Fig. 6. A pond overgrown with dense vegetation – a in The Distribution Of The Invasive Fish Amur Sleeper, Rotan Perccottus Glenii Dybowski, 1877 (Osteichthyes, Odontobutidae), In Latvia
Fig. 6. A pond overgrown with dense vegetation – a typical small pond biotope of Perccottus glenii. Pond Galdnieki, Kalkunes parish, Daugavpils district. 55°50'2.87"N; 26°28'58.57"E.
Fig. 7 in The Distribution Of The Invasive Fish Amur Sleeper, Rotan Perccottus Glenii Dybowski, 1877 (Osteichthyes, Odontobutidae), In Latvia
Fig. 7. The photo from the popular Latvian trade web-site with subadult and young adult of Perccottus glenii for sale with length of 5 – 10 cm. 30 Perccottus glenii ready for selling are seen on the photo (www.ss.lv).
Fig. 3 in Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby
Fig. 3. Mean abundance of Diplostomum spp. in two-year old yellow perch (Perca flavescens) at sites from the three fluvial lakes of the St. Lawrence River between years before and after the establishment of the invasive round goby. Data are expressed as mean number of metacercariae of the genus Diplostomum per fish including uninfected ones ± SEM. Significant differences among years within each locality are indicated by different letters beside histograms. Fish silhouettes within graph panels highlight the presence of the invasive round goby at that given site/year(s), the icon being gray if the species was only occasionally recorded. Main ring-billed gull colonies are illustrated on the map by bird silhouettes: 1 = Cornwall; 2 = Beauharnois; 3 = ̂ILe Deslauriers; 4 = ̂Ile Lefebvre.
Fig. 5 in Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby
Fig. 5. Trends in ring-billed gull (Larus delawarensis) populations (A) and in water levels in the St. Lawrence River (B) during the study period (1998‾2016). A: The solid black curve shows the variation over time of the total number of ring-billed gulls recorded along the St. Lawrence River from Cornwall to Trois-Rivìeres whereas dotted curves depict the change in gull counts in each of the main colonies within this area. The numbered bird icons match those shown in Figs. 1 and 3: Bird 1 = Cornwall; bird 2 = Beauharnois; bird 3 = ̂ILe Deslauriers; bird 4 = ̂Ile Lefebvre. B: Monthly mean water levels in April (green) and September (gray) at the Montreal Jetty no 1 station (solid lines) and at the Summerstown station (dashed lines). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Fig. 2 in Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby
Fig. 2. Variation in Diplostomum spp. mean abundance over years in Lake St. Francis (LSF-1) in (A) one-year old yellow perch (Perca flavescens) and (B) one-year old golden shiner. Data are expressed as mean number of metacercariae of the genus Diplostomum per fish including uninfected ones ± SEM. Significant differences among years within each locality are indicated by different letters above histograms. Black fish silhouettes within graph panels illustrate the occurrence of the invasive round goby among the fish captured at that site. See Fig. 3 for site location.
Fig. 2. A in Drought-associated absence of alien invasive anchorworm, Lernaea cyprinacea (Copepoda: Lernaeidae), is related to changes in fish health
Fig. 2. A) Lernaea cyprinacea infecting Oreochromis mossambicus. B) O. mossambicus skin damage from L. cyprinacea infection, before drought. C) Uninfected O. mossambicus, during drought.
Fig. 3 in Drought-associated absence of alien invasive anchorworm, Lernaea cyprinacea (Copepoda: Lernaeidae), is related to changes in fish health
Fig. 3. Mean ± 1 s.d. condition factor, somatic indices, and health assessment index values from raw data for Lernaea cyprinacea infected and uninfected Oreochromis mossambicus. All infected fish were collected prior to drought in 2013 and indicated in dark gray. All uninfected fish were collected during drought in 2016 and indicated in light gray. GCF = gutted condition factor, HSI = hepatosomatic index, SSI = spleenosomatic index, and GSI = gonadosomatic index. The mean value of each variable is reported above the corresponding bar.
Fig. 1 in Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby
Fig. 1. Temporal changes in the mean abundance of Diplostomum spp. in spottail shiners (Notropis hudsonius) (green circle) and round gobies (Neogobius melanostomus) (black square) at two sites in the St. Lawrence River. Data are expressed as mean numbers of metacercariae of Diplostomum spp. per fish including uninfected ones ± SEM. Significant differences among years within each locality are indicated by different lower-case letters (round gobies) and upper-case letters (spottail shiners). Arrows within graph panels point to year of first sighting of the invasive round goby at each site. On the background map, sampling sites (̂Ilet Vert = IVT, ̂Iles de la Paix = IPA) are identified and the host species examined are represented by different fish silhouettes (green = spottail shiners, black = round gobies). Bird silhouettes indicate where main colonies of ring-billed gulls are localized: 2 = Beauharnois; 3 = ̂ILe Deslauriers. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Fig. 6 in Enigmatic decline of a common fish parasite (Diplostomum spp.) in the St. Lawrence River: Evidence for a dilution effect induced by the invasive round goby
Fig. 6. Potential mechanisms to explain the observed sharp decline of Diplostomum spp. infection in fish in the St. Lawrence River. Those involving a dilution effect induced by the exotic round goby (Neogobius melanostomus) appears in pale red rectangles with rounded corners. Other biotic or abiotic factors are displayed in blue rectangles. Gastropod illustration, representing lymnaeid snails, is a graphic art by Tracey Saxby, provided by the Integration and Application Network (IAN), University of Maryland Center for Environmental Science (www.ian.umces.edu/imagelibrary). The bird image, used to illustrate a ring-billed gull (Larus delawarensis), is a public domain clipart downloaded from www. openclipart.org. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Figure 4 in The invasive Ameiurus nebulosus (Lesueur, 1819) as a permanent part of the fish fauna in selected reservoirs in Central Europe: long-term study of three shallow lakes
Figure 4. Relationship between the relative numbers of the brown bullhead and the total relative numbers of fish (data logtransformed) in the lakes studied; a) Głębokie, b) Sumin, c) Rotcze.
Fig. 1 in Caryophyllidean tapeworms (Cestoda), Nearctic parasites of fish in Mexico, including description of a new species of Isoglaridacris and the first report of Khawia japonensis, an invasive parasite of common carp (Cyprinus carpio)
Fig. 1. Archigetes sp. 1 from Notropis caliensis, Michoac´an (CNHE 6800) (A, C, F); Archigetes (?) sp. 2 from Notropis nazas, Durango (CNHE 6797) (B, E); Archigetes sp. 3 from Chirostoma sp., Michoac´an (CNHE 6801) (D). A, B – total view, dorsally; C, E – anterior part with scolex; note different position of anterior-most testes and vitelline follicles between C and E; D – total view, ventrally; F – ovarian and uterine region, dorsally. Abbreviations: cs – cirrus-sac; eb – excretory bladder; eg – eggs; esv – external seminal vesicle; lo – loculi; ov – ovary; sr – seminal receptacle; te – testes; vf – vitelline follicles.
Fig. 3 in Caryophyllidean tapeworms (Cestoda), Nearctic parasites of fish in Mexico, including description of a new species of Isoglaridacris and the first report of Khawia japonensis, an invasive parasite of common carp (Cyprinus carpio)
Fig. 3. Khawia japonensis (Yamaguti, 1934) from Cyprinus carpio, Durango (CNHE 6516). A – total view, ventrally (median preovarian vitelline follicles omitted except for anterior-most follicles); B – anterior end; C – posterior end, ventrally. Abbreviations: cgp – common genital pore; cs – cirrus-sac; Mg – Mehlis' gland; ov – ovary; povf – postovarian vitelline follicles; sd – sperm duct (vas deferens); sr – seminal receptacle; te – testes; ug – uterine glands; ut – uterus; va – vagina; vf – vitelline follicles.
Fig. 2 in Caryophyllidean tapeworms (Cestoda), Nearctic parasites of fish in Mexico, including description of a new species of Isoglaridacris and the first report of Khawia japonensis, an invasive parasite of common carp (Cyprinus carpio)
Fig. 2. Isoglaridacris brevicollis sp. n. from Catostomus nebuliferus, Durango (CNHE 6802; IPCAS C-885; 2x CNHE 6761) (A–D), Catostomus bernardini, Sonora (CNHE 6796) (E), and Moxostoma astrinum, Jalisco (CNHE 6799) (F); Pseudoglaridacris confusa (Hunter, 1929) from Ictiobus meridionalis, Oaxaca (CNHE 6798) (G). A – total view, ventrally; B – anterior end; C – posterior end, ventrally; D – slightly contracted scolex; E – cirrus-sac with external seminal vesicle, ventrally; F – ovary with overlapping posterior wings, dorsally (uterine loops are omitted at level of ovarian isthmus and more posteriorly); G – total view, dorsally. Abbreviations: cgp – common genital pore; cs – cirrus-sac; eb – excretory bladder; esv – external seminal vesicle; lo – loculi; ov – ovary; povf – postovarian vitelline follicles; sd – sperm duct (vas deferens); te – testes; ut – uterus; va – vagina; vd – vitelline duct; vf – vitelline follicles.
Fig. 1 in Feeding and body condition of an invasive fish species under different environmental conditions
Fig. 1. Sampling sites in the upper Paraná River floodplain. Ivinhema subsystem (1. Ventura Lake, 2. Patos Lake and 3. Ivinhema River), Baía subsystem (4. Guarana Lake, 5. Fechada Lake and 6. Baía River) and Paraná subsystem (7. Pau Veio backwater, 8. Paraná River and 9. Garças Lake).
FIGURE 3 in Invasive poeciliids dominate fish community in a highly altered river: insights from a diversity study of riverbank fishes in Mexico
FIGURE 3 | Canonical Correspondence Analysis (CCA) results showing the relative influence of environmental variable on the community structure of fish species within each site and seasons. Native species are represented by black triangles, while invasive species are denoted by black circles
FIGURE 2 in Invasive poeciliids dominate fish community in a highly altered river: insights from a diversity study of riverbank fishes in Mexico
FIGURE 2 | Rank-abundance curves for each site and each sampled season. Pb: Pseudoxiphophorus bimaculatus; Pr: Poecilia reticulata; Pg: P. gracilis; Pm: P. mexicana; Ga: Goodea atripinnis; Nc: Notropis calientis, Cc: Cyprinus carpio. Native species are highlighted in bold. Due to the high number of individuals in drainage confluence site Log10 was used for comparative purposes.
FIGURE 1 in Invasive poeciliids dominate fish community in a highly altered river: insights from a diversity study of riverbank fishes in Mexico
FIGURE 1 | Map of the sampling sites along the Tula River: 1) Dam spillway, 2) Spring-fed, 3) Drainage confluence.
Linked collectors and determiners for: The occurrence, distribution and biology of invasive fish species in fresh and brackish water bodies of NE Morocco.
Natural history specimen data linked to collectors and determiners held within, "The occurrence, distribution and biology of invasive fish species in fresh and brackish water bodies of NE Morocco". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/55347db9-46a3-449d-8e55-ba6ed02e4820">https://bionomia.net/dataset/55347db9-46a3-449d-8e55-ba6ed02e4820</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/55347db9-46a3-449d-8e55-ba6ed02e4820">https://gbif.org/dataset/55347db9-46a3-449d-8e55-ba6ed02e4820</a>. Formatted as a Frictionless Data package.
Data from: Leveraging environmental DNA (eDNA) to optimize targeted removal of invasive fishes
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