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53 results for “mudskipper”
Figure 7 in Systematics of the mudskipper genus Oxuderces Eydoux & Souleyet 1848 (Teleostei: Gobiidae: Oxudercinae) with resurrection from synonymy of O. nexipinnis (Cantor 1849)
Figure 7. Line drawings of the jaw and jaw suspensorium of (A) Oxuderces nexipinnis (USNM 279359) and (B) Gnatholepis sp. (USNM 287166). Angle between metapterygoid–symplectic–quadrate strut and anguloarticular is acute in O. nexipinnis, in which the preopercle is relatively thin and subcrescent-shaped. In contrast, the angle between the strut and the anguloarticular is obtuse, and the preopercle is wider and broadly crescent-shaped in Gnatholepis sp. Bone is stippled, cartilage is represented by open circles.
Figure 4 in Systematics of the mudskipper genus Oxuderces Eydoux & Souleyet 1848 (Teleostei: Gobiidae: Oxudercinae) with resurrection from synonymy of O. nexipinnis (Cantor 1849)
Figure 4. Histological sections through the head of (A) Oxuderces nexipinnis (USNM 427099) and (B) Apocryptodon wirzi (USNM 432509). The paired adductor arcus palatini lie on either side of the parasphenoid and the intermandibularis spans the lower jaw and connects the dentaries. Bone is bright red, cartilage light blue, muscle and connective tissue dark blue to purple. Scale bar = 0.5 mm.
Fig. 2 in Evidence of positive selection suggests possible role of aquaporins in the water-to-land transition of mudskippers
Fig. 2 Sequence alignment and structural annotation of AQP10a and AQP11b showing positively selected positions in mudskippers (indicated with triangles and olive green or purple bars, respectively). The sequences of the corresponding paralogs of D. rerio are included as reference. Upper bars denote helices and loops. Boxes denote NPA motifs
Fig. 1 in Evidence of positive selection suggests possible role of aquaporins in the water-to-land transition of mudskippers
Fig. 1 Bayesian inference cladogram of vertebrate aquaporins based on 394 aligned amino acid positions. Filled bullets on nodes denote support for both BI and ML methods of phylogenetic inference. Open bullets on nodes denote support for only one of the methods (either BI or ML). Absence of bullet on a node denotes no support for any of the methods. Aquaporin classes are indicated with colour panels and class paralogs
Reproduction ecology of an emerging fishery resource, the amphibious mudskipper Periophthalmus chrysospilos, in the Mekong Delta
<p>The Gold-Spotted mudskipper<i> Periophthalmus chrypsospilos</i> is a potential aquarium pet living in the mudflats in coastal and estuarine regions, but populations of this mudskipper within the Mekong Delta are facing extirpation risks due to indiscriminate harvesting for the growing aquarium and food-fish trade. Consequently, this research aims to provide first reproductive references such as spawning type and season, length at first mature, batch fecundity, being used in conservation and artificially propagation research. Analysis results from 1,031 individuals (523 males and 508 females) reveal that the sex ratio of total individuals recorded is 1:1 (523 males and 508 females) (<i>c<sup>2</sup></i>=0.22, <i>p</i>=0.64). The <i>GSI</i> values are found to exhibit a non-normal distribution (Shapiro-Wilk Test, NJ=0.87, <i>p</i><0.01) and change by gender (Mann-Whitney U, <i>Z</i>=27.04, <i>p</i><0.01), season (<i>Z</i>=6.17, <i>p</i><0.01) and site (Kruskal-Wallis H, <i>c<sup>2</sup></i>=40.72,<i> p<</i>0.01). A combination of <i>GSIs</i> and the monthly appearance of mature gonads suggest that this species reproduces throughout the year, with a peak from July to October. This species exhibits sexual and spatial variation in the size at first maturity (<i>L<sub>m</sub></i>) as <i>L<sub>m</sub></i> is 6.2-8.6 cm in males and 6.4-7.3 cm in females. The batch fecundity (<i>F</i>=2,614 to 23,465 eggs/female) exhibits non-normal distribution (Shapiro-Wilk Test, NJ=0.96, <i>p</i><0.01) and varies with site (Kruskal-Wallis H, <i>c<sup>2</sup> </i>=35.55,<i> p<</i>0.01), reaching the highest point at Dam Doi, Ca Mau (13,336±1,279 SE) and the lowest point at Tran De, Soc Trang (6,654±851 SE). In addition, <i>F</i> is directly proportional to body size due to high determination values of relationships between <i>F</i> and fish size (<i>r<sup>2</sup></i>>0.64 for all cases). Information derived on the reproductive biology of this species can inform its conservation, sustainable exploitation, and ex-situ propagation.</p>
Data from: Phylogeography and demographic history of two widespread Indo-Pacific mudskippers (Gobiidae: Periophthalmus)
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Reproduction ecology of an emerging fishery resource, the amphibious mudskipper Periophthalmus chrysospilos, in the Mekong Delta
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Data from: Ecomorphological adaptation in three mudskippers (Teleostei: Gobioidei: Gobiidae) from the Persian Gulf and the Gulf of Oman
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Figure 11 in Systematics of the mudskipper genus Oxuderces Eydoux & Souleyet 1848 (Teleostei: Gobiidae: Oxudercinae) with resurrection from synonymy of O. nexipinnis (Cantor 1849)
Figure 11. Holotype of Oxuderces dentatus Eydoux & Souleyet (1848), MNHN A.1822, 77.5 mm SL.
Data from: Amphibious mudskipper populations are genetically connected along coastlines, but differentiated across water
<p><strong>Aim:</strong> Many mudskippers in the family Gobiidae are obligately amphibious, requiring both aquatic and terrestrial portions of their life cycle. The terrestrial phase involves restrictions to mudflat habitats during breeding, when adults build burrows in the mud to lay eggs. The effects of this restricted out-of-water phase might be reflected in the population structure of the species. However, dispersal during the aquatic larval phase could connect distant populations. We examine one such mudskipper, <em>Periophthalmus modestus</em>, to test whether populations separated by water are more differentiated than those connected along a coastline.</p> <p><strong>Location:</strong> South and East China Sea</p> <p><strong>Taxon:</strong> <em>Periophthalmus modestus</em> (family: Gobiidae, subfamily: Oxudercinae) (Cantor 1842)</p> <p><strong>Methods:</strong> We collected 236 individuals from ten locations around the East and South China Seas. We used a targeted capture sequencing method, RADcap, to call SNPs from 365 loci. We used multiple spatial and population genetics analyses and coalescent models to address the contemporary and historic biogeography of the species.</p> <p><strong>Results:</strong> Based on observed levels of genetic variation and population structure, populations of <em>Ps. modestus </em>are connected across large distances of continuous coastline and small spans of water. Restricted long-distance dispersal across deep water has resulted in fragmentation of populations. We recovered no signal of isolation by distance, but instead, found genetic differentiation associated with regional groupings separated by large expanses of water.</p> <p><strong>Main conclusions: </strong>These results are consistent with the hypothesis that a limited dispersal phase significantly affects population structure in fishes. The restrictive amphibious life history may be a key factor in the present-day distribution and population structure of <em>Ps. modestus</em>. Interactions between organismal life history and geography are critical for explaining the population genetic structure of a species.</p>
Data from: Environment-dependent prey-capture in the Atlantic mudskipper (Periophthalmus barbarus)
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Data from: Amphibious mudskipper populations are genetically connected along coastlines, but differentiated across water
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Figure 12 in Systematics of the mudskipper genus Oxuderces Eydoux & Souleyet 1848 (Teleostei: Gobiidae: Oxudercinae) with resurrection from synonymy of O. nexipinnis (Cantor 1849)
Figure 12. Oxuderces dentatus, head and anterior portion of the body in ventral view. A, MNHN A.1822 (holotype, 77.5 mm SL) has pectoral fins and lacks pelvic fins. B, USNM 85846 (80.3 mm SL) has fully formed pectoral and pelvic fins. The arrow in A points to the area where the pelvic fins have either been lost or never developed. Anterior is to the left.
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