Ontogeny of Swimming Movements in the Catfish Clarias gariepinus

Mauguit, Quentin; Gennotte, Vincent; Becco, Christophe; Baras, Étienne; Vandewalle, Nicolas; Vandewalle, Pierre

doi:10.2174/1874401x01003010016

Cited by 7 publications

(23 citation statements)

References 42 publications

(59 reference statements)

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“…Three indirect parameters described in Mauguit et al (2010) were used. A preliminary step must be carried out before one can determine the r 2 mean and CV of r 2 indices.…”

Section: Methodsmentioning

confidence: 99%

“…According to the resistive model, larvae must move with large body wave amplitudes along their whole body to exploit the viscous force optimally (Weihs 1980;Batty 1981Batty , 1984Webb and Weihs 1986). This may explain why the larvae of fish such as the sharptooth catfish (Clarias gariepinus (Burchell, 1822)) (Mauguit et al 2010) or D. rerio (Müller and van Leeuwen 2004) are known to use the anguilliform swimming mode in their first developmental stage. In the inertial flow regime, the reactive model prevails: fish need not move their entire bodies to generate thrust (Lauder and Tytell 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, Mauguit et al (2010) developed a new method for describing more precisely the establishment of swimming movements. This method is based on the following considerations.…”

Section: Introductionmentioning

confidence: 99%

“…We compared our results for Corydoras aeneus with those obtained for Clarias gariepinus, an anguilliform swimmer (Mauguit et al 2010). We thus compared swimming ontogeny in two species belonging to the same order but having different swimming modes at adulthood.…”

Section: Introductionmentioning

confidence: 99%

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Ontogeny of swimming movements in bronze corydoras (Corydoras aeneus)

et al. 2010

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Fish larvae experience fundamental morphological, physiological, and physical changes from hatching to adulthood. All of these changes have an effect on the locomotor movements observed in the larvae. We describe the development of swimming movements in larval bronze corydoras (Corydoras aeneus (Gill, 1858); Ostariophysi, Siluriformes) during their ontogeny. Swimming movements of adults and larvae, aged 0-512 h posthatching, were recorded at 500 frames/s. Movements were analyzed by digitizing points along the fish midline. Movements are described by direct (swimming speed and amplitude of landmarks) and indirect (r 2 mean and CV of r 2 as movement coordination indices; Strouhal number as an efficiency index) parameters. The increase in swimming speed correlated with improvement of movement coordination in both larvae and adults, as well as with an increase in swimming efficiency in larvae. Directly after hatching, swimming movements were coordinated but were not efficient. Efficiency increased rapidly with fish growth up to 8 mm total fish length and disappearance of the yolk sac. These events were coupled with reduction of the maximal lateral amplitude observed along the whole body during swimming. The anguilliform swimming mode was used at hatching, but a transition to the carangiform mode was observed at approximately 17 mm total fish length.

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“…Three indirect parameters described in Mauguit et al (2010) were used. A preliminary step must be carried out before one can determine the r 2 mean and CV of r 2 indices.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Consequently, Mauguit et al (2010) developed a new method for describing more precisely the establishment of swimming movements. This method is based on the following considerations.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ontogeny of swimming movements in bronze corydoras (Corydoras aeneus)

et al. 2010

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“…This hypothesis also largely applies to freshwater species with drifting eggs and larvae (Lucas and Baras 2001). Species sharing this life style generally trade off the risk of mortality at egg stage against reduced locomotion, as hatching generally takes place at an early developmental stage, when free embryos still have a short caudal region, poorly developed fins or finfold, and a massive yolk, which generally hampers swimming efficiency (Mauguit et al 2010). However, the latter penalty varies between taxa, as the yolk shape of hatchlings is strongly influenced by phylogeny (Virta and Cooper 2009).…”

Section: Thermal Biology Of Clown Loach Eggsmentioning

confidence: 99%

Biology and culture of the clown loachChromobotia macracanthus(Cypriniformes, Cobitidae) : 2- Importance of water movement and temperature during egg incubation

Slembrouck¹,

Priyadi²,

Permana³

et al. 2012

Aquat. Living Resour.

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-In comparison to older life stages, the embryonic stages of fishes generally have narrow tolerance ranges for environmental conditions, as regards water quality, temperature and mechanical shocks. The knowledge of these factors is indispensable to appraise the threats brought about by climate or anthropogenic changes upon their resilience, and to define adequate ways of incubating their eggs for an efficient propagation of the species under controlled conditions. Clown loach eggs have a narrow thermal tolerance range in comparison to other tropical and temperate fishes. Hatching occurs at 22−30• C, and non-deformed larvae can only be obtained at 23.8−30.2 • C. Furthermore, the thermal tolerance of any particular progeny was found dependent on the maintenance temperature of the female parent, thereby making the actual tolerance no broader than 4.5• C. The (log-log) relationship between the duration of the incubation period and temperature was characterized by a shallow slope, which is more typical of coldwater fishes, as is a narrow thermal tolerance range. On the other hand, clown loach hatched more rapidly (20 h at 26• C) than predicted by existing models on the basis of water temperature and egg diameter, a feature that is shared by other warmwater fishes producing eggs that undergo a strong swelling process (about three times the ova diameter in clown loach). Clown loach embryos are strongly sensitive to mechanical shocks, but their development is not viable either in protracted steady state conditions, in absence of water movement, as they develop various deformities (e.g. pericardial oedema). This is thought to originate from a hypoxic microenvironment around the embryo, as a consequence of an oxygen gradient developing inside and outside the egg, since the boundary diffusion layer is not refreshed by water movement. This issue is worsened by strong egg swelling and incubation at warm temperature.

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