Quantifying elevational effect on the geometric body shape of Russian beetle Carabus exaratus (Coleoptera: Carabidae)

Benítez, Hugo A.; Sukhodolskaya, Raisa; Avtaeva, T. A.; Escobar-Suárez, Scott; Órdenes-Clavería, Rodrigo; Laroze, David; Hernández-P, Raquel; Vavilov, Dmitriy N.

doi:10.1016/j.jcz.2022.11.005

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Besides real size variation the variation of shape should be studied. Our investigated species-C. exaratus-showed distinct shape variation in altitude gradient with elongated specimen in low mountains [24].…”

Section: Resultsmentioning

confidence: 76%

Sexual Dimorphism in Physiological Reactions to Biotope Type (the Case Study in Ground Beetles)

Khomitskiy,

Avtaeva,

Kushalieva

et al. 2024

Genetics

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Sexual size dimorphism (SSD) (the difference between males and females in size) is considered to be the physiological reaction to environmental conditions. We estimated body size variation and SSD in two populations of ground beetle Carabus exaratus. Beetles were sampled in Krasnodar Province (Russia) in the forb-cereal meadow and beech-hornbeam forest. We processed morphometric measurements in 521 specimen for six linear traits. Beetles from the meadow were slightly larger than from the forest. SSD was pronounced in a half of traits being the highest by elytra length. On a whole, SSD did not differ in the populations studied.

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Section: Resultsmentioning

confidence: 76%

Sexual Dimorphism in Physiological Reactions to Biotope Type (the Case Study in Ground Beetles)

Khomitskiy,

Avtaeva,

Kushalieva

et al. 2024

Genetics

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“…This challenges conventional understanding and calls for a closer examination of the underlying mechanisms [6,8,20]. For example, in high-latitude regions like the Arctic, sub-Arctic and sub-Antarctic ecosystems, smaller-bodied individuals (groups) have been documented, in contrast to those found at lower latitudes, with larger-bodied groups [21]. The existence of this converse pattern challenges the prevailing notion that larger body size is universally advantageous in colder climates.…”

Section: Introductionmentioning

confidence: 99%

Breaking the Law: Is It Correct to Use the Converse Bergmann Rule in Ceroglossus chilensis? An Overview Using Geometric Morphometrics

Benítez,

Muñoz-Ramírez,

Correa

et al. 2024

Insects

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The converse Bergmann’s rule is a pattern of body size variation observed in many ectothermic organisms that contradicts the classic Bergmann’s rule and suggests that individuals inhabiting warmer climates tend to exhibit larger body sizes compared to those inhabiting colder environments. Due to the thermoregulatory nature of Bergmann’s rule, its application among ectotherms might prove to be more complicated, given that these organisms obtain heat by absorbing it from their habitat. The existence of this inverse pattern therefore challenges the prevailing notion that larger body size is universally advantageous in colder climates. Ceroglossus chilensis is a native Chilean beetle that has the largest latitudinal range of any species in the genus, from 34.3° S to 47.8° S. Within Chile, it continuously inhabits regions extending from Maule to Aysen, thriving on both native and non-native forest species. Beyond their remarkable color variation, populations of C. chilensis show minimal morphological disparity, noticeable only through advanced morphological techniques (geometric morphometrics). Based on both (1) the “temperature–size rule”, which suggests that body size decreases with increasing temperature, and (2) the reduced resource availability in high-latitude environments that may lead to smaller body sizes, we predict that C. chilensis populations will follow the converse Bergmann’s rule. Our results show a clear converse pattern to the normal Bergmann rule, where smaller centroid sizes were found to be measured in the specimens inhabiting the southern areas of Chile. Understanding the prevalence of the converse Bergmann’s rule for ectotherm animals and how often this rule is broken is of utmost importance to understand the underlying mechanisms allowing organisms to adapt to different environments and the selective pressures they face.

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Combination of Morphometric and Morphological Analyses: An Effective Approach for the Study of Platynus from the Italian W Alps (Coleoptera, Carabidae, Platynini)

et al. 2023

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In the W Italian Alps, an area characterized by considerable environmental complexity, the widespread Platynus were studied by focusing on their species composition. The ecological niche realized by the genus in this area encompasses a preference for humid and cold environments, sometimes associated with altitude. Several specimens from private and public collections were investigated by geometric morphometrics, a powerful technique capable of detecting even minor morphological variation. The quantitative analysis was paired to a qualitative survey of anatomical traits. To classify and discriminate species, external traits (head, pronotum, right elytron) and internal structures (male and female genitalia, mouthparts) were evaluated by direct examination and dissection. The results supported the presence of the five species already known from the study area and also helped to identify four new cryptic taxa to which the specific rank was assigned. They are herein described as Platynus maritimus n. sp., Platynus occitanus n. sp., Platynus simonisi n. sp., and Platynus vignai n. sp.

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Quantifying elevational effect on the geometric body shape of Russian beetle Carabus exaratus (Coleoptera: Carabidae)

Cited by 3 publications

References 46 publications

Sexual Dimorphism in Physiological Reactions to Biotope Type (the Case Study in Ground Beetles)

Sexual Dimorphism in Physiological Reactions to Biotope Type (the Case Study in Ground Beetles)

Breaking the Law: Is It Correct to Use the Converse Bergmann Rule in Ceroglossus chilensis? An Overview Using Geometric Morphometrics

Combination of Morphometric and Morphological Analyses: An Effective Approach for the Study of Platynus from the Italian W Alps (Coleoptera, Carabidae, Platynini)

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