The water-hopping kinematics of the tree-climbing fish, Periophthalmus variabilis

Wicaksono, Adhityo; Hidayat, Saifullah; Retnoaji, Bambang; Alam, Parvez

doi:10.1016/j.zool.2020.125750

Cited by 6 publications

(5 citation statements)

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“…During aquatic locomotion (e.g. swimming or diving), P. variabilis relies completely on its caudal fins and sometimes pectoral fins (Wicaksono et al 2020). Therefore, in regards to pelvic fin actions during terrestrial locomotion, the pelvic fin of B. boddarti appears to work by curving (retraction during swimming), flattening (upon extension), and drags along the ventral face of the fish in cycle, which is possibly to hold on a watery/muddy surface to allow the B. boddarti to stand still in the substrate as a sitting pad.…”

Section: Resultsmentioning

confidence: 99%

“…The pectoral fins of P. variabilis assist the mudskipper to move forward like a pair of front limbs, acting like a pair of crutches, while the unfused pelvic fins stabilise their movement and act like hind limbs (Gibson 1986;Sayer 2005;Kutschera and Elliott 2013). The pectoral fins of P. variabilis, also deployed mid-air during the unique locomotion of water-hopping to soften the landing (Wicaksono et al 2020). Unlike the amphibians and higher vertebrates, the P. variabilis unfused pelvic fins deployed instantly in a piston-like movement as the result of pressure from the pectoral musculature into the lateral muscle which presses the pelvic fins downward (Wicaksono et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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The Morphologies of Mudskipper Pelvic Fins in Relation to Terrestrial and Climbing Behaviour

et al. 2022

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Two species of mudskipper are identified with different behaviours, which are related to their pelvic fin morphologies. Periophthalmus variabilis has unfused pelvic fins and is capable to climb on the vertical substrate. Another species, Boleophthalmus boddarti has fused pelvic fins which supports the fish mobility across the muddy substrate. In context of anatomy, both pelvic fins are composed of a frenum which covers the pelvic girdle and pelvic fin rays (lepidotrichia). The unfused pelvic fin of P. variabilis has split rays that are not interconnected, whereas the pelvic fins of B. boddarti are fused completely and the fin rays are merged to the skin. The pelvic fin ray bones of B. boddarti are composed of large bone structure, allowing it to function as a strong sitting pad on a semiterrestrial substrate. Comparatively, in P. variabilis, the ray Saifullah Hidayat and Adhityo Wicaksono: shared first authorship.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Morphologies of Mudskipper Pelvic Fins in Relation to Terrestrial and Climbing Behaviour

et al. 2022

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“…They can survive on land for extended periods by breathing through their skin and through the lining of the mouth and throat. They propel themselves over land on their sturdy forefins, and some of them are also able to climb trees and skip atop the surface of the water [ 3 ]. They inhabit tropical, subtropical, and temperate regions, including the Indo-Pacific and the Atlantic coast of Africa [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Chromosome-level genome assembly of the shuttles hoppfish, Periophthalmus modestus

et al. 2022

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Background The shuttles hoppfish (mudskipper), Periophthalmus modestus, is one of the mudskippers, which are the largest group of amphibious teleost fishes, which are uniquely adapted to live on mudflats. Because mudskippers can survive on land for extended periods by breathing through their skin and through the lining of the mouth and throat, they were evaluated as a model for the evolutionary sea-land transition of Devonian protoamphibians, ancestors of all present tetrapods. Results A total of 39.6, 80.2, 52.9, and 33.3 Gb of Illumina, Pacific Biosciences, 10X linked, and Hi-C data, respectively, was assembled into 1,419 scaffolds with an N50 length of 33 Mb and BUSCO score of 96.6%. The assembly covered 117% of the estimated genome size (729 Mb) and included 23 pseudo-chromosomes anchored by a Hi-C contact map, which corresponded to the top 23 longest scaffolds above 20 Mb and close to the estimated one. Of the genome, 43.8% were various repetitive elements such as DNAs, tandem repeats, long interspersed nuclear elements, and simple repeats. Ab initio and homology-based gene prediction identified 30,505 genes, of which 94% had homology to the 14 Actinopterygii transcriptomes and 89% and 85% to Pfam familes and InterPro domains, respectively. Comparative genomics with 15 Actinopterygii species identified 59,448 gene families of which 12% were only in P. modestus. Conclusions We present the high quality of the first genome assembly and gene annotation of the shuttles hoppfish. It will provide a valuable resource for further studies on sea-land transition, bimodal respiration, nitrogen excretion, osmoregulation, thermoregulation, vision, and mechanoreception.

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“…Periophthalmus gracilis is one of three species of the Periophthalmus in MD ( Tran et al, 2013 ) and 19 species in the world ( Murdy & Jaafar, 2017 ). It occurs quite frequently in mudflat and mangrove regions ( Murdy, 1989 ; Kottelat et al, 1993 ; Jaafar & Hou, 2012 ; Tran et al, 2013 ; Tran et al, 2020 ; Dinh et al, 2021b ; Tran et al, 2021a ) and can move flexibly in and out of the water to catch preys ( Wicaksono et al, 2020 ). In MD, P. gracilis is being captured for food supply that leads to the reduction of fish resources day by day; however, there is no data on its biology, ecology, and which factors affect the fish population.…”

Section: Introductionmentioning

confidence: 99%

Factors regulating growth pattern and condition factor of an amphibious fish Periophthalmus gracilis living in the Mekong Delta

Dinh

Nguyen

Truong

et al. 2022

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Growth pattern and condition factor (CF) are essential to fish resource assessment but limited to Periophthalmus gracilis—an amphibious fish living in the mudflats along the Indo-Pacific regions, including the Mekong Delta (MD), Vietnam. This study lasted from April 2020 to March 2021 to verify if their growth pattern and CF change with sex, size, season, month and site. The total length and weight of 486 individuals (236 females and 250 males) were 2.9–5.9 cm and 0.13–1.66 g, respectively. The mudskipper displayed negative allometry as the slope value (b = 2.69 ± 0.06) obtained from length and weight (LWR) was significantly less than 3 (p < 0.01), indicating that most fish specimens were caught in the immature stage. The fish growth pattern did not change with sex as both males and females displayed negative allometry but varied by size since the mudskipper showed negative allometry in the immature group and isometry in the mature group. Likewise, growth type changed with season since fish showed negative allometry in the dry season but isometry in the wet season. As the slope value (b) varied by site and month, the mudskipper displayed spatiotemporal growth patterns, ranging from negative to positive allometry. The CF was impacted by sex as this value of females (1.09 ± 0.02) was higher than that of males (0.96 ± 0.01, p < 0.01). Besides, CF was regulated by fish length since this value was higher in the mature group (1.12 ± 0.03) than in the immature group (1.01 ± 0.01, p < 0.01). Likewise, CF was affected by season as this value was higher in the wet season (1.05 ± 0.02) than in the dry season (0.99 ± 0.01, p < 0.01). Although the CF varied with site and month variables (p < 0.01), this value (1.02 ± 0.01) was generally higher than 1, showing fish adapted well to their habitat. The fish length at first capture should be increased to exploit this species sustainably.

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The water-hopping kinematics of the tree-climbing fish, Periophthalmus variabilis

Abstract: Author's pre-print of The water-hopping kinematics of the tree-climbing fish, Periophthalmus variabilis. ZOOLOGY (Elsevier)

Cited by 6 publications

References 29 publications

The Morphologies of Mudskipper Pelvic Fins in Relation to Terrestrial and Climbing Behaviour

The Morphologies of Mudskipper Pelvic Fins in Relation to Terrestrial and Climbing Behaviour

Chromosome-level genome assembly of the shuttles hoppfish, Periophthalmus modestus

Factors regulating growth pattern and condition factor of an amphibious fish Periophthalmus gracilis living in the Mekong Delta

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