Morphological adaptations for burrowing, such as an elongated body, and a small head may constrain feeding behaviour in fossorial reptiles. We experimentally examined the effect of prey type on prey capture and handling behaviour of the amphisbaenian Blanus cinereus. This amphisbaenian showed four different handling modes according to the characteristics of each prey type. When prey diameter was narrower than gape-size, prey were consumed without prey processing; when prey diameter was wider than gape-size, B. cinereus shifted handling mode to prey processing. Amphisbaenians scraped or tore off bite-sized pieces of large prey and showed longer handling times for some prey types than most epigean saurians. Flexibility in feeding behaviour may allow amphisbaenians to exploit variable underground trophic resources, overcoming constraints of morphological adaptation to fossoriality.
Andrews R.M., Pough F.H., Collazo A., De Queiroz A. (1987): The ecological cost of morphological specialization: Feeding by a fossorial lizard. Oecologia 73: 139-145.
Avery R.A., Mynott A. (1990): The effects of temperature on prey handling time in the common lizard, Lacerta vivipara. Amph.-Rept. 11: 111-112.
Avery R.A., Bedford J.D., Newcombe C.P. (1982): The role of thermoregulation in lizard biology: Predatory efficiency in a temperate diurnal basker. Behav. Ecol. Sociobiol. 11: 262-267.
Busack S.D. (1988): Biochemical and morphological differentiation in Spanish and Moroccan populations of Blanus and the description of a new species from northern Morocco (Reptilia, Amphisbaenia, Amphisbaenidae). Copeia 1988: 101-109.
Cooper W.E. (1981): Head-first swallowing of large prey by a scincid lizard, Eumeces laticeps. J. Herpetol. 15: 371-373.
Demarco V.G., Drenner R.W., Ferguson G.W. (1985): Maximum prey size of an insectivorous lizard, Sceloporus undulatus garmani. Copeia 1985: 1077-1080.
Diefenbach C.O., Emslie S.G. (1971): Cues influencing the direction of ingestion of the Japanese snake, Elaphe climacophora (Colubridae, Serpentes). Herpetologica 27: 461-466.
Gans C. (1974): Biomechanics: An approach to vertebrate biology. Lippincot, Philadelphia.
Gil M.J., Guerrero F., Pérez-Mellado V. (1993): Observations on morphometrics and ecology in Blanus cinereus (Reptilia: Amphisbaenia). J. Herp. 27: 205-209.
Goetz M. (2007): On the husbandry and reproduction of Blanus cinereus (Vandelli, 1797) (Squamata: Amphisbaenia) in captivity. Salamandra 43: 52-56.
Herrel A., Measey G.J. (2012): Feeding underground: kinematics of feeding in caecilians. J. Exp. Zool. A 317: 533-539.
Herrel A., Van Damme R., Vanhooydonck B., De Vree F. (2001): The implications of bite performance for diet in two species of lacertid lizards. Can. J. Zool. 79: 662-670.
Jayne B.C., Voris H.K., Ng P.K.L. (2002): Snake circumvents constraints on prey size. Nature 418: 143.
Kamel S., Gatten R.E. (1983): Aerobic and anaerobic activity metabolism of limbless and fossorial reptiles. Physiol. Zool. 56: 419-429.
Kardong K.V. (1982): Comparative study of changes in prey capture behavior of the cottonmouth (Agkistrodon piscivorus) and the egyptian cobra (Naja haje). Copeia 1982: 337-343.
Kaspari M. (1990): Prey preparation and the determinants of handling time. Anim. Behav. 40: 118-126.
Lopez P., Martin J. (2001): Chemosensory predator recognition induces specific defensive behaviours in a fossorial amphisbaenian. Anim. Behav. 62: 259-264.
Lopez P., Salvador A. (1992): The role of chemosensory cues in discrimination of prey odors by the amphisbaenian Blanus cinereus. J. Chem. Ecol. 18: 87-93.
Lopez P., Martin J., Salvador A. (1991): Diet selection by the amphisbaenian Blanus cinereus. Herpetologica 47: 210-218.
López P., Salvador A., Martín J. (1998): Soil temperatures, rock selection and the thermal ecology of the amphisbaenian reptile Blanus cinereus. Can. J. Zool. 76: 673-679.
Malkmus R. (1991): Zur aktivitätsrhytmik der netzwühle Blanus cinereus. Nachr. Naturwiss. Mus. Aschaff. 98: 79-91.
Marques O.A.V., Sazima I. (1997): Diet and feeding behavior of the Coral Snake Micrurus corallinus, from the Atlantic Forest of Brazil. Herpetol. Nat. Hist. 5: 88-93.
Martin J., Lopez P., Salvador A. (1990): Field body temperatures of the amphisbaenid lizard Blanus cinereus. Amph.-Rept. 11: 87-96.
Measey J., Herrel A. (2006): Rotational feeding in caecilians: putting a spin on the evolution of cranial design. Biol. Lett. 2: 485-487.
Mori A. (1991): Effects of prey size and type on prey-handling behavior in Elaphe quadrivirgata. J. Herpetol. 25: 160-166.
Navas C.A., Antoniazzi M.M., Carvalho J.E., Chaui-Berlink J.G., James R.S., Jared C., Kohlsdorf T., Pai-Silva M.D., Wilson R.S. (2004): Morphological and physiological specialization for digging in amphisbaenians, an ancient lineage of fossorial vertebrates. J. Exp. Biol. 207: 2433-2441.
Paulissen M.A. (1987): Optimal foraging and intraspecific diet differences in the lizard Cnemidophorus sexlineatus. Oecologia 71: 439-446.
Pough F.H., Andrews R.M. (1985): Energy costs of subduing and swallowing prey for a lizard. Ecology 66: 1525-1533.
Salvador A. (1981): Blanus cinereus (Vandelli, 1797) Netzwühle. In: Handbuch der Reptilien und Amphibien Europas, Band 1: Echen (Sauria) I, p. 277-289. Böhme W., Ed., Akademische Verlag, Wiesbaden.
Schwenk K. (2000): Feeding: form, function and evolution in tetrapod vertebrates. Academic Press, New York.
Siegel S., Castellan N.J. (1988): Nonparametric statistics for the behavioral sciences, 2nd Edition. McGraw-Hill, New York.
Sokal R.R., Rohlf F.J. (1995): Biometry, 3rd Edition. W.H. Freeman, San Francisco.
Vanhooydonck B., Boistel R., Fernandez V., Herrel A. (2011): Push and bite: trade-offs between burrowing and biting in a burrowing skink (Acontias percivali). Biol. J. Linn. Soc. 101: 461-475.
Verwaijen D., Van Damme R., Herrel A. (2002): Relationships between head size, bite force, prey handling efficiency and diet in two sympatric lacertid lizards. Funct Ecol. 16: 842-850.
Withers P.C. (1981): Physiological correlates of limblessness and fossoriality in scincid lizards. Copeia 1981: 197-204.
Relationship between log10 transformed prey volume (mm3) and partial handling time (s) (excluding time spent in pauses) of the amphisbaenian B. cinereus. The different symbols represent the different prey types (see legend).
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Morphological adaptations for burrowing, such as an elongated body, and a small head may constrain feeding behaviour in fossorial reptiles. We experimentally examined the effect of prey type on prey capture and handling behaviour of the amphisbaenian Blanus cinereus. This amphisbaenian showed four different handling modes according to the characteristics of each prey type. When prey diameter was narrower than gape-size, prey were consumed without prey processing; when prey diameter was wider than gape-size, B. cinereus shifted handling mode to prey processing. Amphisbaenians scraped or tore off bite-sized pieces of large prey and showed longer handling times for some prey types than most epigean saurians. Flexibility in feeding behaviour may allow amphisbaenians to exploit variable underground trophic resources, overcoming constraints of morphological adaptation to fossoriality.
All Time | Past 365 days | Past 30 Days | |
---|---|---|---|
Abstract Views | 153 | 0 | 0 |
Full Text Views | 184 | 42 | 4 |
PDF Views & Downloads | 173 | 50 | 2 |