Crescimento alométrico, morfologia e uso do habitat em cinco espécies de Mabuya Fitzinger (Reptilia, Scincidae)

Pinto, Gabriel Silva; Ávila-Pires, Teresa Cristina Sauer

doi:10.1590/s0101-81752004000200001

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…Despite the importance of evolutionary history in determining the microhabitat choices of tadpoles, morphological changes are needed to refine the adaptation of an organism to the environment. The typical morphology of a population should confer optimal performance on the organism in the occupied habitat (Pinto & Ávila‐pires ). However, we expect a time lag between environmental modification and the emergence of new morphological attributes, which results in adaptive refinement.…”

Section: Discussionmentioning

confidence: 99%

Where to Live? How Morphology and Evolutionary History Predict Microhabitat Choice by Tropical Tadpoles

Marques

Nomura

2015

Biotropica

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Tadpoles have diverse morphologies and occupy diverse habitats. The morphological differences between tadpoles can be represented by linear and geometric measurements and used to explain the organization of tadpole assemblages. However, the effects of evolutionary history must be isolated from the morphological differences before we can determine which patterns result from the use and sharing of common ecological resources. Here, we aimed to determine how morphological similarities and phylogenetic distances affect microhabitat choice by tadpoles. We analyzed the tadpoles of 101 anuran species and classified them according to ecomorphological guild, habitat use, position in the water column, and floor substrate. We used geometric and traditional morphometric approaches to describe the morphological variation among tadpoles and calculated the patristic distance for each species. Afterwards, we used morphometric and phylogenetic matrices as predictors of the variance in the ecological matrix, using a partial redundancy analysis. When we used traditional morphometric data, phylogeny explained a large amount of the ecological variation. By contrast, when we used geometric morphometric data, morphology and phylogeny explained similar amounts of the ecological variation, showing that the technique used to extract morphological variation affects the results. We provide evidence that both morphology, as a surrogate for contemporary factors, and evolutionary inertia are important in determining the behavior of tadpoles. Thus, niche conservatism can be important in modeling the behavior of tadpoles, but does not explain all the preferences of tadpoles.

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Section: Discussionmentioning

confidence: 99%

Where to Live? How Morphology and Evolutionary History Predict Microhabitat Choice by Tropical Tadpoles

Marques

Nomura

2015

Biotropica

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“…Those three prey types are usually among the most important items in the diets of M. agilis in other areas (Vrcibradic & Rocha, 1995aVrcibradic, 2001;Rocha et al, 2002) and in the diets of other Brazilian Mabuya species (Vitt & Blackburn, 1991;Vitt, 1995;Vrcibradic & Rocha, 1995bVitt et al, 1997;Pinto, 1999). Thus, it seems that the insular habitat and the absence of potential competitors (i.e., other similar-sized diurnal lizards) do not have a strong influence on the general food habits of M. agilis at Praia do Sul.…”

Section: Discussionmentioning

confidence: 99%

Diet of the lizard Mabuya agilis (Sauria; Scincidae) in an insular habitat (Ilha Grande, RJ, Brazil)

2004

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We examined the stomach contents of 21 specimens of Mabuya agilis (Sauria; Scincidae) collected during February 2001 at the restinga habitat of Praia do Sul, in Ilha Grande, RJ, Brazil. Diet was composed of various types of small arthropods, with no plant material being eaten. Spiders were the most important items in the diet, followed by orthopterans. Apart from the absence of isopterans, the diet of Mabuya agilis from this insular area was similar to those of other conspecific mainland populations. This suggests that factors such as insularity and the absence of other small sympatric lizards may not have a significant effect on the feeding habits of the Praia do Sul population.

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“…In dorsal view, the variation observed was associated with body shape (e.g., compressed laterally or globular) and position of eyes and nostrils (e.g., lateral or dorsal). These characteristics show the refined responses of the tadpoles to changes in the habitats, especial the tail and body characteristics (Grosjean, 2005;Xavier Jordani et al, 2019), since morphology should provide an optimal swimming performance in an occupied habitat (Pinto and Ávila-Pires, 2004;Marques and Nomura, 2015;Xavier Jordani et al, 2019). We can't exclude the tadpoles autonomy to access different water depths according to your preferences to abiotic variations on streamlets (Warkentin, 1992).…”

Section: Shape Variation In Lateral and Dorsal Viewmentioning

confidence: 99%

Re-description of external morphology and factors affecting body and tail shape of the stone frog tadpoles

Gonçalves

Hendges²,

Madalozzo³

et al. 2022

Acta Herpetol.

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Ecological studies testing the preponderance of environmental filters on ontogeny to explain the variation in tadpole morphology are scarce for Neotropical anurans. We used tadpoles of the stone frog Limnomedusa macroglossa (Alsodidae): (1) to assess the variation in body and tail shape; (2) to examine the effect of streamlet depth and allometry on tadpole shape, and (3) to re-describe and compare the tadpole external morphology with closely related species. We obtained the body shape and size from 150 tadpoles. The re-description was based on 57 qualitative and 24 quantitative characters, from 19 tadpoles between stages 30 and 37 and 31 to 37, respectively. Allometry was the major factor influencing the lateral view of body shape: smaller tadpoles had round bodies and eyes and nostrils positioned more laterally in comparison with larger ones. Thus, the power of ontogenetic variations reported here makes the tadpole developmental “climax” period a questionable concept that deserves additional attention. The depth gradient of streamlets also affected the shape: in shallower environments, the tadpoles presented a decrease in height of the body, fins and tail muscles, and an increase in body width. These results may indicate adaptations allowing better swimming performance in lotic environments with intense water flow. The external morphological characterization of L. macroglossa presented here differed from that previously reported, mainly due to coloration, body shape, nostril, anal tube, tail, shape and position of nostrils and snout. Additionally, we presented unknown traits for this species, making comparisons with closely related species within the Alsodidae family.

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Crescimento alométrico, morfologia e uso do habitat em cinco espécies de Mabuya Fitzinger (Reptilia, Scincidae)

Cited by 9 publications

References 18 publications

Where to Live? How Morphology and Evolutionary History Predict Microhabitat Choice by Tropical Tadpoles

Where to Live? How Morphology and Evolutionary History Predict Microhabitat Choice by Tropical Tadpoles

Diet of the lizard Mabuya agilis (Sauria; Scincidae) in an insular habitat (Ilha Grande, RJ, Brazil)

Re-description of external morphology and factors affecting body and tail shape of the stone frog tadpoles

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