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24 results for “Periophthalmus”
Fig 4 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
Fig 4: Scatter plot showing the positions of the measured specimens on a scatter plot. Note the few outliers in the plot.
Figure 1 in First record of the mudskipper Periophthalmus walailakae (Gobiidae) from southeast India
Figure 1. – Geographic distribution of P. walailakae (black dots: Polgar and Khaironizam, 2008) and new record (star); inset: sampling stations in the Vellar estuary, where P. walailakae was first recorded (St- 1–St-3).
Fig. 3 in Description of a new species of Periophthalmus (Teleostei: Gobiidae) from the Lesser Sunda Islands
Fig. 3. Live specimen of Periophthalmus gracilis, approximately 48 mm SL, collected in Vietnam (Photograph by: Tran Dac Dinh).
Fig. 1 in Description of a new species of Periophthalmus (Teleostei: Gobiidae) from the Lesser Sunda Islands
Fig. 1. Holotype of Periophthalmus pusing sp. nov. MZB 23015, female, 35.3 mm SL, collected in Sumba Island, Indonesia (Photograph by: Sandra Raredon).
Fig. 4 in Description of a new species of Periophthalmus (Teleostei: Gobiidae) from the Lesser Sunda Islands
Fig. 4. Occurrence of Periophthalmus pusing represented by a black circle—Sumba Island, Indonesia. The base map is courtesy of d-maps. com.
Fig. 2 in Description of a new species of Periophthalmus (Teleostei: Gobiidae) from the Lesser Sunda Islands
Fig. 2. Live specimen of Periophthalmus pusing sp. nov., approximately 35 mm SL, collected in Sumba Island, Indonesia.
Figure 5 in Linking a gap, First record of dusky-gilled mudskipper Periophthalmus variabilis Eggert, 1935 (Perciformes: Gobiidae) in southern Sumatra, Indonesia
Figure 5. Raised first and second dorsal fins of P. variabilis with characteristic pigmentation (© M. Iqbal).
Figure 4 in Linking a gap, First record of dusky-gilled mudskipper Periophthalmus variabilis Eggert, 1935 (Perciformes: Gobiidae) in southern Sumatra, Indonesia
Figure 4. Ventral view of P. variabilis showing pelvic fins with frenum and the inner rays fused at their base (© M. Iqbal).
Figure 1 in Linking a gap, First record of dusky-gilled mudskipper Periophthalmus variabilis Eggert, 1935 (Perciformes: Gobiidae) in southern Sumatra, Indonesia
Figure 1. Distribution of Periophthalmus variabilis, circles indicate previous records, triangle represents most recent record in southern Sumatra, Sugihan estuary, 02°55'41.8''S; 104°45'51.6''E.
Figure 2 in Linking a gap, First record of dusky-gilled mudskipper Periophthalmus variabilis Eggert, 1935 (Perciformes: Gobiidae) in southern Sumatra, Indonesia
Figure 2. Location at Sugihan estuary in southern Sumatra where P. variabilis was found (© M. Iqbal).
Anatomical insights into fish terrestrial locomotion: a study of barred mudskipper (Periophthalmus argentilineatus) fins based on μCT 3D reconstructions
<p>Mudskippers are a group of extant ray-finned fishes with an amphibious lifestyle and serve as exemplars for understanding the evolution of amphibious capabilities in teleosts. A comprehensive anatomical profile of both the soft and hard tissues within their propulsive fins is essential for advancing our understanding of terrestrial locomotor adaptations in fish. Despite the ecological significance of mudskippers, detailed data on their musculoskeletal anatomy remains limited. In the present research, we utilized contrast-enhanced high-resolution micro-computed tomography (μCT) imaging to investigate the barred mudskipper, <em>Periophthalmus argentilineatus</em>. This technique enabled detailed reconstruction and quantification of the morphological details of the pectoral, pelvic, and caudal fins of this terrestrial mudskipper, facilitating comparison with its aquatic relatives. Our findings reveal that <em>P. argentilineatus</em> has undergone complex musculoskeletal adaptations for terrestrial movement, including an increase in muscle complexity and muscle volume, as well as the development of specialized structures like aponeuroses for pectoral fin extension. Skeletal modifications are also evident, with features such as a reinforced shoulder-pelvic joint and thickened fin rays. These evolutionary modifications suggest biomechanically advanced fins capable of overcoming the gravitational challenges of terrestrial habitats, indicating a strong selective advantage for these features in land-based environments. The unique musculoskeletal modifications in the fins of mudskippers like <em>P. argentilineatus</em>, compared to their aquatic counterparts, mark a critical evolutionary shift toward terrestrial adaptations. This study not only sheds light on the specific anatomical changes facilitating this transition but also offers broader insights into the early evolutionary mechanisms of terrestrial locomotion, potentially mirroring the transformative journey from aquatic to terrestrial life in the lineage leading to tetrapods.</p>
Complete mitochondrial genome sequence of the Atlantic Mudskipper (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes: Gobiidae)
<p>The complete mitochondrial genome of the Atlantic mudskipper (<em>Periophthalmus barbarus</em>) was determined in this study. The specimen was collected from Abonnema, Nigeria (4.73075, 6.77565). The complete mitogenome sequence of <em>P. barbarus</em> would be useful for further studies on molecular phylogenetic relationship and population genetics of the subfamily Oxudercinae.</p>
Fig 2 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
Fig 2: Principal component plot 1 of the measurements.
Fig 1 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
Fig 1: Morphometric and meristic measurements of Mudskipper and their abbreviations.
Fig 3 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
Fig 3: Principal component plot 1 of the measurements.
Table 2 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
<p><b>Table 2:</b> Minimum, maximum, means and standard deviation of Morphometrical measurements.</p><table><tbody><tr><th><b>Character</b></th><th><b>Minimum</b></th><th><b>Maximum Mean</b></th><th><b>Standard deviation</b></th></tr></tbody><tbody><tr><th>SL/TL</th><td>0.39</td><td>0.96</td><td>0.83</td><td>0.05</td></tr><tr><th>HL/TL</th><td>0.13</td><td>0.70</td><td>0.26</td><td>0.06</td></tr><tr><th>HW/HL</th><td>0.17</td><td>1.29</td><td>0.49</td><td>0.13</td></tr><tr><th>HD/HL</th><td>0.20</td><td>1.05</td><td>0.59</td><td>0.12</td></tr><tr><th>SNL/HL</th><td>0.03</td><td>0.65</td><td>0.32</td><td>0.10</td></tr><tr><th>ED/HL</th><td>0.01</td><td>0.50</td><td>0.24</td><td>0.07</td></tr><tr><th>PDL/TL</th><td>0.07</td><td>0.36</td><td>0.29</td><td>0.04</td></tr><tr><th>BD/TL</th><td>0.06</td><td>1.03</td><td>0.14</td><td>0.10</td></tr><tr><th>D1L/TL</th><td>0.03</td><td>0.19</td><td>0.13</td><td>0.04</td></tr><tr><th>D2L/TL</th><td>0.09</td><td>0.23</td><td>0.17</td><td>0.03</td></tr><tr><th>PFL/TL</th><td>0.06</td><td>0.27</td><td>0.17</td><td>0.05</td></tr><tr><th>AFL/TL</th><td>0.01</td><td>0.14</td><td>0.09</td><td>0.02</td></tr><tr><th>CFL/TL</th><td>0.07</td><td>0.24</td><td>0.16</td><td>0.03</td></tr><tr><th>CPL/TL</th><td>0.09</td><td>0.25</td><td>0.17</td><td>0.03</td></tr></tbody></table>
Table 3 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
<p><b>Table 3:</b> The linear measurements, Eigenvalue and the percentage variance.</p><table><tbody><tr><th><b>PC</b></th><th><b>Eigenvalue</b></th><th><b>% variance</b></th></tr></tbody><tbody><tr><th>1</th><td>0.0402861</td><td>55.892</td></tr><tr><th>2</th><td>0.00907681</td><td>12.593</td></tr><tr><th>3</th><td>0.00525164</td><td>7.286</td></tr><tr><th>4</th><td>0.0044251</td><td>6.1393</td></tr><tr><th>5</th><td>0.00371241</td><td>5.1505</td></tr><tr><th>6</th><td>0.00292212</td><td>4.0541</td></tr><tr><th>7</th><td>0.00193359</td><td>2.6826</td></tr><tr><th>8</th><td>0.000979485</td><td>1.3589</td></tr><tr><th>9</th><td>0.000803069</td><td>1.1142</td></tr><tr><th>10</th><td>0.000724781</td><td>1.0055</td></tr><tr><th>11</th><td>0.000611192</td><td>0.84796</td></tr><tr><th>12</th><td>0.000581671</td><td>0.807</td></tr><tr><th>13</th><td>0.000536577</td><td>0.74444</td></tr><tr><th>14</th><td>0.000233605</td><td>0.3241</td></tr></tbody></table>
Table 1 in Morphometrical characterization of the Atlantic mudskipper species (Periophthalmus barbarus) (Linnaeus, 1766) (Perciformes; Gobiiae) from Abonema in Port Harcourt, Rivers State, Nigeria
<p><b>Table 1:</b> Range (cm), mean and standard deviation of morphometric characters of <i>Periophthalmus barbarus</i> (n=100).</p><table><tbody><tr><th><b>Character</b></th><th><b>Minimum Maximum (cm) (cm)</b></th><th><b>Mean (cm)</b></th><th><b>Standard deviation</b></th></tr></tbody><tbody><tr><th>TL</th><td>9.28</td><td>14.86</td><td>11.41</td><td>1.15</td></tr><tr><th>SL</th><td>3.9</td><td>12.19</td><td>9.48</td><td>1.11</td></tr><tr><th>HL</th><td>1.47</td><td>7.5</td><td>3.01</td><td>0.69</td></tr><tr><th>HW</th><td>0.39</td><td>2.29</td><td>1.43</td><td>0.31</td></tr><tr><th>HD</th><td>0.91</td><td>2.66</td><td>1.74</td><td>0.34</td></tr><tr><th>SNL</th><td>0.1</td><td>1.9</td><td>0.95</td><td>0.31</td></tr><tr><th>PDL</th><td>0.71</td><td>4.64</td><td>3.29</td><td>0.53</td></tr><tr><th>ED</th><td>0.03</td><td>1.42</td><td>0.71</td><td>0.24</td></tr><tr><th>BD</th><td>0.57</td><td>11.58</td><td>1.59</td><td>1.13</td></tr><tr><th>D1L</th><td>0.36</td><td>2.8</td><td>1.46</td><td>0.50</td></tr><tr><th>D2L</th><td>1.08</td><td>3.13</td><td>1.90</td><td>0.38</td></tr><tr><th>PFL</th><td>0.57</td><td>3.35</td><td>1.96</td><td>0.68</td></tr><tr><th>AFL</th><td>0.13</td><td>1.83</td><td>1.03</td><td>0.25</td></tr><tr><th>CFL</th><td>0.7</td><td>3.1</td><td>1.80</td><td>0.45</td></tr><tr><th>CPL</th><td>0.84</td><td>2.83</td><td>1.95</td><td>0.41</td></tr></tbody></table>
Figure 3 in Linking a gap, First record of dusky-gilled mudskipper Periophthalmus variabilis Eggert, 1935 (Perciformes: Gobiidae) in southern Sumatra, Indonesia
Figure 3. Periophthalmus variabilis, Sugihan estuary, southern Sumatra (© M. Iqbal).
Anatomical insights into fish terrestrial locomotion: a study of barred mudskipper (Periophthalmus argentilineatus) fins based on μCT 3D reconstructions
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