An Experimental Study on the Gait Patterns and Kinematics of Chinese Mitten Crabs

doi:10.1016/S1672-6529(13)60226-7

Abstract

Abstract:

Despite the many studies on eight-legged animals and the importance of their mechanics of terrestrial locomotion, the mechanical energy of crabs in voluntary locomotion on uneven, unpredictable terrain surfaces has received little attention thus far. In this paper, motion video images of Chinese mitten crab (Eriocheir sinensis Milne-Edwards) locomotion on five types of terrains were recorded using a high-speed three-dimensional (3D) recording video system. The typical variables of locomotion such as gait patterns, duty factor, mechanical energy of the mass center, mass-specific rate of the total mechanical power of the mass center, and percentage recovery, were analyzed. Results show that the Chinese mitten crab uses random gaits instead of the alternating tetrapod gait with the increasing terrain roughness. The duty factors of the rows of the leading legs are greater for all terrains than those of the rows of the trailing legs. On smooth terrain, the duty factors of the rows of the trailing legs are greater than that on rough terrains. Kinematic measurements and calculations reveal that similar to mammals, birds, and arthropods, the Chinese mitten crab uses two fundamental gaits to save mechanical energy: the inverted pendulum gait and the bouncing gait. The bouncing gait is the main pattern of mechanical energy conservation. The low probability of injury and energy expenditure due to adaptations to various terrains induce the Chinese mitten crab to modify the mass-specific rate of the total mechanical power of the mass center. The statistical results of percentage recovery also reveal that the Chinese mitten crab has lower energy recovery efficiency over rough terrains compared with smooth terrains.

Key words: biomechanics, Chinese mitten crab, gait patterns, kinematics

Jianqiao Li, Xiaodong Zhang, Meng Zou, Rui Zhang, Benard Chirende, Ruiyang . An Experimental Study on the Gait Patterns and Kinematics of Chinese Mitten Crabs[J].J4, 2013, 10(3): 305-315.

References

[1] Sponberg S, Full R J. Neuromechanical response of mus-culo-skeletal structures in cockroaches during rapid running on rough terrain. Journal of Experimental Biology, 2008, 211, 433–446.
[2] Zhang Y, Huang H, Liu X Y, Ren L Q. Kinematics of ter-restrial locomotion in mole cricket Gryllotalpa orientalis. Journal of Bionic Engineering, 2011, 8, 151–157.
[3] Tian W J, Cong Q, Menon C. Investigation on walking and pacing stability of German shepherd dog for different lo-comotion speeds. Journal of Bionic Engineering, 2011, 8, 18–24.
[4] Farley C T, Ko T C. Mechanics of locomotion in lizards. Journal of Experimental Biology, 1997, 200, 2177–2188.
[5] Blickhan R, Full R J. Locomotion energetic of the ghost crab II. Mechanics of the centre of mass during walking and run-ning. Journal of Experimental Biology, 1987, 130, 155–174.
[6] Full R J, Weinstein R B. Integrating the Physiology, me-chanics and behavior of rapid running ghost crabs: Slow and steady doesn’t always win the race. American Zoologist, 1992, 32, 382–395.
[7] Dickinson M H, Farley C T, Full R J, Koehl M A R, Kram R, Lehman S. How animals move: An integrative view. Science, 2000, 288,100–106.
[8] Timothy M G, Russell P M, Claire T F. Biomechanics of quadrupedal walking: How do four-legged animals achieve inverted pendulum-like movements. Journal of Experi-mental Biology, 2004, 207, 3545–3558.
[9] Kristine L S, Rodger K, Jinger S G. The role of elastic energy storage and recovery in downhill and uphill running. Journal of Experimental Biology, 2012, 215, 2283–2287.
[10] Weinstein R B. Locomotor behavior of nocturnal ghost crabs on the beach: Focal animal sampling and instantaneous ve-locity from 3D motion analysis. Journal of Experimental Biology, 1995, 198, 989–999.
[11] Biancardi C M, Fabrica C G, Polero P, Loss F J and Minetti A E. Biomechanics of octopedal locomotion: Kinematic and kinetic analysis of the spider Grammostola mollicoma. Journal of Experimental Biology, 2011, 214, 3433–3442.
[12] Martinez M M, Full R J, Koehl M A. Underwater punting by an intertidal crab: A novel gait revealed by the kinematics of pedestrian locomotion in air versus water. Journal of Ex-perimental Biology, 1998, 201, 2609–2623.
[13] Hui C A. Walking of the shore crab Pachygrapsus crassipes in its two natural environments. Journal of Experimental Biology, 1992, 165, 213–227.
[14] Clark P F, Rainbow P S, Bobbins R S, Smith B, Yeomans W E, Thomas M, Dobson G. The alien Chinese mitten crab, Eriocheir sinensis (crustacean: decapoda: brachyura), in the thames catchment. Journal of the Marine Biological Asso-ciation of United Kingdom, 1998, 78, 1215–1221.
[15] Herborg L M, Rushton S P, Clare A S, Bentley M G. Spread of the Chinese mitten crab (Eriocheir sinensis H. Miline Edwards) in Continental Europe: Analysis of a historical data set. Hydrobiologia, 2003, 503, 21–28.
[16] Lu Z X, Chen N, Perdok U D, Hoogmoed W B. Charac-terisation of soil profile roughness. Biosystems Engineering, 2005, 91, 369–377.
[17] Bryant R, Moran M S, Thoma D P, Thoma C D, Collins H, Skirvin S, Rahman M, Slocum K, Starks P, Bosch D, Gon-zález Dugo M P. Measuring surface roughness height to parameterize radar backscatter models for retrieval of sur-face soil moisture. IEEE Geoscience and Remote Sensing Letters, 2007, 4, 137–141.
[18] Jindrich D V, Full R J. Dynamic stabilization of rapid hexapedal locomotion. Journal of Experimental Biology, 2002, 205, 2803–2823.
[19] Full R J, TU M S. Mechanics of six-legged runners. Journal of Experimental Biology, 1990, 148, 129–146.
[20] Cavagna G A, Heglund N C, Taylor C R. Mechanical work in terrestrial locomotion: Two basic mechanisms for mini-mizing energy expenditure. Journal of Applied Physiology, 1977, 233, R243–R256.
[21] Barnes W J P. Leg co-ordination during walking in the crab, Uca pugnax. Journal of Comparative Physiology A, 1975, 96, 237–256.
[22] Heglund N C, Cavagna G A, Taylor C R. Energetics and mechanics of terrestrial locomotion III. Energy changes of the centre of mass as a function of speed and body size in birds and mammals. Journal of Experimental Biology, 1982, 79, 41–56.

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