Comparative analysis of fiber‐type composition in the iliofibularis muscle of phrynosomatid lizards (Squamata)

Bonine, Kevin E.; Gleeson, Todd T.; Garland, Theodore

doi:10.1002/jmor.1069

Cited by 51 publications

(40 citation statements)

References 73 publications

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“…Recently, Bonine et al (2000) have reported a negative relationship between the percentage of fast glycolytic and fast oxidativeglycolytic fibers in the iliofibularis muscle of phrynosomatid lizards.…”

Section: Discussionmentioning

confidence: 98%

Speed and Stamina Trade-Off in Lacertid Lizards

Vanhooydonck¹,

Damme²,

Aerts³

2007

Evolution

113

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Morphological and physiological considerations suggest that sprinting ability and endurance capacity put conflicting demands on the design of an animal's locomotor apparatus and therefore cannot be maximized simultaneously. To test this hypothesis, we correlated size-corrected maximal sprint speed and stamina of 12 species of lacertid lizards. Phylogenetically independent contrasts of sprint speed and stamina showed a significant negative relationship, giving support to the idea of an evolutionary trade-off between the two performance measures. To test the hypothesis that the trade-off is mediated by a conflict in morphological requirements, we correlated both performance traits with snout-vent length, size-corrected estimates of body mass and limb length, and relative hindlimb length (the residuals of the relationship between hind-and forelimb length). Fast-running species had hindlimbs that were long compared to their forelimbs. None of the other size or shape variables showed a significant relationship with speed or endurance. We conclude that the evolution of sprint capacity may be constrained by the need for endurance capacity and vice versa, but the design conflict underlying this trade-off has yet to be identified.

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Section: Discussionmentioning

confidence: 98%

Speed and Stamina Trade-Off in Lacertid Lizards

Vanhooydonck¹,

Damme²,

Aerts³

2007

Evolution

113

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“…The data of Perry (1999) do not show the presence of bimodality within either clade, nor among them, although members of Iguania tend to be more sedentary than are members of Autarchoglossa. Similarly, Bonine and Garland (1999) and Bonine et al (2001) showed that locomotor performance and underlying morphologies are highly diverse among species within Phrynosomatidae. For example, demonstrated rapid changes in structure and function related to communicative displays among populations of Sceloporus graciosus, and Martins (1993) and Martins and Lamont (1998) showed substantial and sometimes rapid divergence in head bob displays among species and populations of Cyclura.…”

Section: Biological Factors Affecting Home Range Sizementioning

confidence: 92%

Lizard Home Ranges Revisited: Effects of Sex, Body Size, Diet, Habitat, and Phylogeny

Perry

Garland

2002

Ecology

122

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The area traversed by an animal during food gathering, mating, and other routine activities is termed the home range (HR), and its size is believed to reflect behavioral and physiological requirements (e.g., access to mates and food). We evaluated both biological and methodological factors that may affect estimated HR sizes of lizards. We compiled a database of nearly 500 published sex ϫ population data sets. These yielded usable data for 108 populations from 60 species, all with both sexes represented. Initial analyses indicated pervasive sex differences, so sexes were analyzed separately with both conventional and phylogenetically based statistical methods. First, we conducted conventional analyses of covariance, which treat each data point as statistically independent. Second, we repeated these analyses while comparing members of two major clades represented in our database, Iguania and Autarchoglossa. Third, we repeated the analyses after designating smaller clades, nested within major clades. Fourth, we performed a fully phylogenetic analysis via independent contrasts and a composite phylogeny assembled from published studies. All analyses showed highly significant effects of both biological (body size, diet, habitat type) and most methodological (calculation method and minimum number of sightings per individual, but not study duration) factors and covariates tested. The conventional analysis comparing Iguania and Autarchoglossa en toto indicated a significant difference, as has been suggested in the literature. The analysis with nested minor clades, however, revealed differences among these but not between the two major clades. The analysis with phylogenetically independent contrasts indicated no statistically significant differences either among minor clades or between major clades. We also used our database to compare the scaling of HR area to body mass, using recently published allometric equations for field metabolic rates of lizards. The similarity of allometric slopes suggests that, interspecifically, HR size scales directly with energetic requirements. Intraspecifically, however, we found that males in both Autarchoglossa and Iguania consistently had larger HRs than did females. This difference, presumably related to the need to maximize access to females, may impose a ''cost of reproduction'' on males.

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“…Within 48 h of cryosectioning, half of the slides were subjected to NADH diaphorase-SDH staining and half to actomyosin ATPase staining, following procedures described by Gleeson (1983), Higham et al (2011), andO'Connor et al (2011). Fibers staining darkly for ATPase indicate high ATPase enzyme activity, and those staining darkly for SDH indicate a high oxidative capacity (Gleeson et al 1980;Gleeson 1983;Bonine et al 2001).…”

Section: Histochemistrymentioning

confidence: 99%

“…Reptilian skeletal locomotor muscles are often composed primarily of fast glycolytic (FG) fibers (Gleeson 1983;Bonine et al 2001;Meyer et al 2002), which have a high capacity for generating rapid movement, but fatigue quickly. Therefore, such muscles might not be expected to sustain movement following autotomy for the lengths of time observed for the tail of Eublepharis macularius (Meyer et al 2002).…”

Section: Tail Kinematics and Contractile Muscle Dynamicsmentioning

confidence: 99%

Controlled Chaos: Three-Dimensional Kinematics, Fiber Histochemistry, and Muscle Contractile Dynamics of Autotomized Lizard Tails

Higham¹,

Lipsett²,

Syme³

et al. 2013

Physiological and Biochemical Zoology

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The ability to shed an appendage occurs in both vertebrates and invertebrates, often as a tactic to avoid predation. The tails of lizards, unlike most autotomized body parts of animals, exhibit complex and vigorous movements once disconnected from the body. Despite the near ubiquity of autotomy across groups of lizards and the fact that this is an extraordinary event involving the self-severing of the spinal cord, our understanding of why and how tails move as they do following autotomy is sparse. We herein explore the histochemistry and physiology of the tail muscles of the leopard gecko (Eublepharis macularius), a species that exhibits vigorous and variable tail movements following autotomy. To confirm that the previously studied tail movements of this species are generally representative of geckos and therefore suitable for in-depth muscle studies, we quantified the three-dimensional kinematics of autotomized tails in three additional species. The movements of the tails of all species were generally similar and included jumps, flips, and swings. Our preliminary analyses suggest that some species of gecko exhibit short but high-frequency movements, whereas others exhibit larger-amplitude but lower-frequency movements. We then compared the ATPase and oxidative capacity of muscle fibers and contractile dynamics of isolated muscle bundles from original tails, muscle from regenerate tails, and fast fibers from an upper limb muscle (iliofibularis) of the leopard gecko. Histochemical analysis revealed that more than 90% of the fibers in original and regenerate caudal muscles had high ATPase but possessed a superficial layer of fibers with low ATPase and high oxidative capacity. We found that contraction kinetics, isometric force, work, power output, and the oscillation frequency at which maximum power was generated were lowest in the original tail, followed by the regenerate tail and then the fast fibers of the iliofibularis. Muscle from the original tail exhibited greater resistance to fatigue, followed by the regenerate tail and then the fast iliofibularis fibers. These results suggest that the relatively slow and oxidative fibers found within the tail musculature have a significant impact on contractile function, which translates into a trade-off between longevity of performance and power after autotomy.

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Comparative analysis of fiber‐type composition in the iliofibularis muscle of phrynosomatid lizards (Squamata)

Cited by 51 publications

References 73 publications

Speed and Stamina Trade-Off in Lacertid Lizards

Speed and Stamina Trade-Off in Lacertid Lizards

Lizard Home Ranges Revisited: Effects of Sex, Body Size, Diet, Habitat, and Phylogeny

Controlled Chaos: Three-Dimensional Kinematics, Fiber Histochemistry, and Muscle Contractile Dynamics of Autotomized Lizard Tails

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