How sexual differences affect locomotor performance and metabolism of the Sword Snake: An integrated view from energetics

Lima-Santos, Jade; Carvalho, José Eduardo de; Brasileiro, Cínthia A.

doi:10.1111/jzo.12908

Cited by 5 publications

(4 citation statements)

References 54 publications

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“…The population-level analysis revealed no correspondence between performance and metabolic rate. These results are similar to those of a recent study of locomotor performance and metabolism in snakes, which measured oxygen consumption and maximum activity of two enzymes (lactate dehydrogenase and citrate synthase), which also showed no correspondence with sprint speed [87]. So far, performance characteristics and properties of metabolism in reptiles do not show obvious signs of coupling, but further studies on this aspect are needed.…”

Section: Discussionsupporting

confidence: 86%

Is It Function or Fashion? An Integrative Analysis of Morphology, Performance, and Metabolism in a Colour Polymorphic Lizard

et al. 2022

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Colour polymorphism may be accompanied by alternative expressions of phenotypic traits that are directly or indirectly related to fitness, and selection forces may act on the traits separately or concurrently. In polymorphic species, natural selection may act through frequency- or density-dependent mechanisms and maintain polymorphism through interactions among morphs. We used an integrative approach to examine functionally relevant and interrelated life history traits in the context of colour polymorphism in the European wall lizard (Podarcis muralis). Body, head and limb morphology, bite and locomotor performance, and physiology, particularly metabolic and antioxidant capacity, were analysed in the three pure colour morphs (yellow, orange, white) and the two mosaic morphs (yellow-orange and white-orange). Morphological differences between morphs were present but subtle and consisted mainly of variations in head length. Head size and bite force were strongly associated between and within morphs. Limb and boot morphology and locomotor performance (sprinting and climbing) were variably associated among morphs. Finally, variation in biochemical indicators of cellular metabolism and antioxidant capacity appeared to be largely independent of morphology and performance. The results provide evidence for existing and non-existing relationships between colour and morphology, performance, and physiology that could have short- and long-term effects on selection.

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Section: Discussionsupporting

confidence: 86%

Is It Function or Fashion? An Integrative Analysis of Morphology, Performance, and Metabolism in a Colour Polymorphic Lizard

et al. 2022

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“…2005 ). Lima-Santos et al. (2021) described how sexual differences affect the locomotor performance and metabolism in Tomodon dorsatus, being faster in males and showing increased basal metabolism.…”

Section: Discussionmentioning

confidence: 99%

Echocardiographic measurements and cardiac anatomy in healthy Western hognose snakes (Heterodon nasicus)

Oliveri¹,

Carnabuci²,

Vignoli³

et al. 2023

Vet. Med.

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This study aims to describe the most important cardiac structures in the Heterodon nasicus through echocardiography and anatomical dissection. Echocardiographic and echo-Doppler measurements were performed on twenty healthy adult Heterodon nasicus (10.10). The values of the ventricular length, aortic diameter, pulmonary trunk diameter, the mean thickness of the interventricular septum, and thicknesses of the wall of the cavum pulmonale (Cav. P) and cavum arteriosum (Cav. A), were measured. The aortic flow and pulmonary trunk flow were recorded. Two dead specimens (1.1) were dissected. The male's pulmonary trunk diameter was bigger compared to the female's in both the long and short axis. The reproductive ecology of Heterodon nasicus has yet to be fully elucidated upon, however, male territorialism and dispersal from the hibernacula, and multiple male courtships toward a single female were described, hence, the more active reproductive activity of the male and the consequent sexual selection toward a higher aerobic performance can be hypothesised. A moderate interventricular right to left shunt was noticed in the Cav. V of all the specimens, which is considered normal and should not confuse the clinician. Congenital defects, cardiomyopathies, valvulopathies, and pericardial diseases are known to occur in ophidians and other reptiles. Reliable data and profound knowledge of the anatomy and physiology of the ophidian heart are fundamental for the in vivo diagnosis of cardiac diseases in snakes.

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“…On the other hand, the RMR of males is greater than that of females during vitellogenesis and pregnancy. This result can be explained by the sexual dimorphism of the species, where males are smaller than females (Lima‐Santos et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Does reproductive effort influence the metabolic rate of Tomodon dorsatus snakes?

et al. 2021

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In Squamate reptiles, vitellogenesis in females is marked by an increase in the number and size of follicles, leading to an increase in aerobic metabolism to support the rising energy demand during reproductive activity. Male gametes are smaller than female gametes, and spermiogenesis requires less energy than vitellogenesis. This investigation compares the relationship between aerobic metabolism and reproductive effort in male and female viviparous Tomodon dorsatus snakes. We evaluated the influence of the males' and females' reproductive stages, along with the masses of follicles and testicles, on their aerobic metabolic rate. Our findings show that females have higher maintenance cost of pregnancy than metabolic costs of vitellogenesis. In males, we found no evidence of the reproductive effort influencing aerobic metabolic rates. In T. dorsatus, females have a long period of development and high fecundity. Therefore, the metabolic costs of vitellogenesis represent a critical component in the reproductive effort. On the other hand, males of T. dorsatus maintain a similar mass of gonads throughout the year with constant energy demand. These results reflect the difference in reproductive efforts between females and males of T. dorsatus.

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How sexual differences affect locomotor performance and metabolism of the Sword Snake: An integrated view from energetics

Cited by 5 publications

References 54 publications

Is It Function or Fashion? An Integrative Analysis of Morphology, Performance, and Metabolism in a Colour Polymorphic Lizard

Is It Function or Fashion? An Integrative Analysis of Morphology, Performance, and Metabolism in a Colour Polymorphic Lizard

Echocardiographic measurements and cardiac anatomy in healthy Western hognose snakes (Heterodon nasicus)

Does reproductive effort influence the metabolic rate of Tomodon dorsatus snakes?

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