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138 results for “Clarias”
Fig. 6 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 6. Phylogram of Camallanidae based on 18S rDNA, with Spirocerca lupi (Rudolphi, 1809) as the outgroup. Procamallanus and Paracamallanus data from the present study are indicated in purple and orange, respectively. Nodal support presented for Bayesian inference and Maximum Likelihood approaches (BI/ML), with support lower than 0.75/75% excluded and support above 0.9/90% indicated by an asterisk (*).
Fig. 4 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 4. Scanning electron micrographs of Paracamallanus cyathopharynx (Baylis, 1923) from Clarias gariepinus (Burchell, 1822). A-anterior end, apical view; B- anterior end, apical view, arrow shows oesophagus; C- isolated buccal capsule, lateral view, arrow shows oesophagus; C(i)- isolated buccal capsule, lateral view, double arrow shows isthmus; D-microdissected anterior buccal capsule, ventral view of longitudinal ridges. E- lateral view of deirid; F, G, G(i)- posterior end of female, apical view, digit-like processes. a = amphid; s = submedian papilla; sc = sclerotised plate; t = trident; 1 = anterior buccal capsule; 2 = anterior part of posterior buccal capsule; 3 = posterior part of buccal capsule.
Fig. 1. Maps indicating the sampling locality within South Africa. A in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 1. Maps indicating the sampling locality within South Africa. A- Map of Africa. B- Map of South Africa; red square highlighting area of interest. C- Map of Crocodile River flowing from Lake Heritage (sampling site) to Hartbeespoort Dam further downstream.
Fig. 7 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 7. Non-metric Multi-dimensional Scaling (nMDS) scatter plot explaining the diversity and abundance of the parasite infracommunities of Clarias gariepinus (Burchell) from Gariep Dam (GD), Great Fish River (GFR) and Riviersonderend River (RSE) in South Africa. The ordination illustrates the similarity between parasite infracommunities, with a Pearson's correlation vector overlay showing parasitic taxa with a correlation>0.1. Similarity levels (15, 30) were selected based on the hierarchical cluster analyses (Resemblance = 50) of Bray Curtis coefficients.
Fig. 6 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 6. Parasite infracommunity composition of Clarias gariepinus (Burchell) from Gariep Dam (GD), Great Fish River (GFR) and Riviersonderend River (RSE). A – abundance (N); B – species richness (S); C – Brillouin's diversity index (DB); D – Shannon-Wiener diversity index (H′); E – Simpson diversity index (D) and F – Pielou's evenness index (J′). The mean and 95% confidence interval of each index is presented. Significant differences are considered as p <0.05 and denoted with an asterisk (*) in a table for each index.
Fig. 5 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 5. Photomicrographs of A – Paracamallanus sp. and Argulus japonicus Thiele, 1900, B – dorsal view and C – ventral view. Scale bars: 20 μm (A); 1000 μm (A, B).
Fig. 4 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 4. Photomicrographs of Orientocreadium batrachoides Tubangui, 1831 (A – D) from the intestine and Tylodelphys mashonensis Beverley-Burton, 1963 (E – H) from the cranial cavity of Clarias gariepinus (Burchell) during the present study. White arrows indicate structures of taxonomic relevance. Abbreviations: Gp – genital pore, OS – oral sucker, Ph – pharynx, Ps – pseudosuckers, Vs – ventral sucker. Scale bars: 50 μm (F–H); 100 μm (B–D, E); 500 μm (A).
Fig. 2 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 2. Map depicting the distribution of A. the Asian tapeworm, Schyzocotyle acheilognathi (Yamaguti, 1934) and B. the branchiuran fish lice, Argulus japonicus Thiele, 1900 from freshwater fishes in South Africa. Dark grey shading indicates provinces where freshwater fish parasitological research has been conducted more frequently.
Fig. 3 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 3. Photomicrographs of Monogenea found from the gills of Clarias gariepinus (Burchell) during the present study. A, B – Quadriacanthus aegypticus ElNaggar et Serag, 1985; C, D – Quadriacanthus allobychowskiella Paperna, 1979; E, F – Quadriacanthus clariadis Paperna, 1961; G, H – Quadriacanthus fornicatus Francov´a et ˇRehulkov´a, 2017; I – Quadriacanthus pravus Francov´a et ˇRehulkova´, 2017. Black arrows indicate structures of taxonomic relevance. Hamuli (A, C, E, G, I); male copulatory organ with accessory piece (B, D, F, H). Scale bars: 10 μm (B, D, F, H); 20 μm (I); 25 μm (A, C, E, G).
Fig. 1 in Parasite diversity and community structure of translocated Clarias gariepinus (Burchell) in South Africa: Testing co-introduction, parasite spillback and enemy release hypotheses
Fig. 1. Map indicating the localities where Clarias gariepinus (Burchell) were collected during the present study. The orange overlay indicates the translocated distribution of C. gariepinus in South Africa. Dark grey shading represents provinces where freshwater fish parasitological research has been conducted more frequently. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Figure 2 in Aspects qualitatifs et quantitatifs de l'alimentation de Clarias buettikoferi (Siluriformes; Clariidae) dans la forêt des marais Tanoé-Ehy (Côte d'Ivoire)
Figure 2. - Distribution des fréquences de taille des spécimens de Clarias buettikoferi capturés dans la forêt des marais Tanoé-Ehy (Côte d'Ivoire) entre mars 2012 et février 2013 (saison sèche: n = 66; saison des pluies, n = 142). [Length frequency distribution of C. buettikoferi caught in the Tanoe-Ehy swamp forest (Côte d'Ivoire) from March 2012 through February 2013 (dry season: n = 66; rainy season: n = 142).]
Figure 1. - Sites d in Aspects qualitatifs et quantitatifs de l'alimentation de Clarias buettikoferi (Siluriformes; Clariidae) dans la forêt des marais Tanoé-Ehy (Côte d'Ivoire)
Figure 1. - Sites d'échantillonnage (●) de Clarias buettikoferi dans la forêt des marais Tanoé-Ehy (Côte d'Ivoire). [Sampling sites of C. buettikoferi in the Tanoe-Ehy swamp forest (Côte d'Ivoire).]
Figure 3 in Aspects qualitatifs et quantitatifs de l'alimentation de Clarias buettikoferi (Siluriformes; Clariidae) dans la forêt des marais Tanoé-Ehy (Côte d'Ivoire)
Figure 3. - Régime alimentaire en fonction de la taille chez Clarias buettikoferi provenant de la forêt des marais Tanoé-Ehy (Côte d'Ivoire). Groupe 1: n = 29, LS <130 mm; groupe 2: n = 68, 130 ≤ LS <175; groupe 3: n = 45, LS ≥ 175. [Dietary shift with size in C. buettikoferi from the TanoeEhy swamp forest (Côte d'Ivoire). Class 1: n = 29, LS <130 mm; class 2: n = 68, 130 ≤ LS <175; class 3: n = 45, LS ≥ 175.]
FIG. 1 in Deux monogènes nouveaux parasites branchiaux de Clarias ebriensis Pellegrin, 1920 (Siluriformes, Clariidae) en Côte-d'Ivoire
FIG. 1. — Mesures utilisées dans cette étude. Abréviations: bd, barre transversale dorsale; bv, barre transversale ventrale; ct, longueur de la partie centrale; h, longueur de l'expension médiane; x, longueur totale; w, largeur; cn, cuneus; I, longueur; j, largeur; g, gripus; a, longueur totale; e, longueur de la pointe; ba, largeur de la base; u, longueur totale de l'uncinulus; pa, longueur de la pièce accessoire du pénis; pe, longueur du pénis.
FIG. 3. — Quadriacanthus ivoiriensis n in Deux monogènes nouveaux parasites branchiaux de Clarias ebriensis Pellegrin, 1920 (Siluriformes, Clariidae) en Côte-d'Ivoire
FIG. 3. — Quadriacanthus ivoiriensis n. sp. Abréviations: bd, barre transversale dorsale; bv, barre transversale ventrale; cnd, cuneus dorsal; cnv, cuneus ventral; gd, gripus dorsal; gv, gripus ventral; pa, pièce accessoire; pe, pénis; vg, vagin; I à VII, uncinuli. Échelle: 30 µm.
FIG. 2. — Quadriacanthus eboreus n in Deux monogènes nouveaux parasites branchiaux de Clarias ebriensis Pellegrin, 1920 (Siluriformes, Clariidae) en Côte-d'Ivoire
FIG. 2. — Quadriacanthus eboreus n. sp. Abréviations: bd, barre transversale dorsale; bv, barre transversale ventrale; cnd, cuneus dorsal; cnv, cuneus ventral; gd, gripus dorsal; gv, gripus ventral; pa, pièce accessoire; pe, pénis; vg, vagin; I à VII, uncinuli. Échelle: 30 µm.
Fig. 2 in New records of digenean parasites of Clarias gariepinus (Pisces: Clariidae) from the Okavango Delta, Botswana, with description of Thaparotrema botswanensis sp. n. (Plathelminthes: Trematoda)
Fig. 2. Light and scanning electron micrographs of Clinostomoides brieni Dollfus, 1950 (A–E) and Neodiplostomum type 1 metacercaria (F–H) from Clarias gariepinus in the Okavango Delta: (A) excysted metacercariae; (B) whole mount; (C) spines on body surface; (D) reproductive system; (E) excretory pore; (F) metacercariae encysted in muscle; (G) oral sucker and pharynx; (H) holdfast organ. Scale bars: A, B – 1 mm; C – 2 µm, D, F – 0.1 mm; E – 20 µm; G – 0.05 mm; H – 0.01 mm.
Fig. 1 in New records of digenean parasites of Clarias gariepinus (Pisces: Clariidae) from the Okavango Delta, Botswana, with description of Thaparotrema botswanensis sp. n. (Plathelminthes: Trematoda)
Fig. 1. Light microscope projection drawings of digeneans from Clarias gariepinus in the Okavango Delta: (A) Clinostomoides brieni Dollfus, 1950; (B) Neodiplostomum Railliet, 1919 type 1 metacercaria; (C) Phyllodistomum bavuri Boomker, 1984; (D) Phyllodistomum vanderwaali Prudhoe & Hussey, 1977; (E) Glossidium pedatum Looss, 1899; (F) Thaparotrema botswanensis sp. n. Scale bars: A, C – 1 mm; D – 0.3 mm; B, E – 0.1 mm; F – 0.2 mm.
Fig. 4 in New records of digenean parasites of Clarias gariepinus (Pisces: Clariidae) from the Okavango Delta, Botswana, with description of Thaparotrema botswanensis sp. n. (Plathelminthes: Trematoda)
Fig. 4. Light micrographs of Thaparotrema botswanensis sp. n. collected from Clarias gariepinus in the Okavango Delta: (A) whole mount; (B) pharynx; (C) anterior and posterior testes; (D) seminal vesicle; (E) genital opening; (F) ovary and seminal receptacle; (G) vitellaria and uterus filled with eggs; (H) excretory bladder. Scale bars: A – 1 mm; B, C, E, F, H – 0.1 mm; D, G – 0.05 mm.
Fig. 5 in Additional data on Spinitectus petterae (Nematoda: Rhabditida) from Clarias gariepinus (Siluriformes: Clariidae) in the Vaal River system: conserved morphology or high intraspecific genetic variability?
Fig. 5. Scanning electron micrographs of immature female of Spinitectus petterae Boomker, 1993 collected from Clarias gariepinus (Burchell). A – apical view of cephalic region; B – vulva; C – conical tail end; D – conical tail. Abbrevations: A – anus; CA – caudal papilla; L – labium; MT – mucron tip; PL – pseudolabium.
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