The relationship between brain size and digestive tract length do not support expensive-tissue hypothesis in Hylarana guentheri

Liu, Ya Ting; Luo, Yi; Gu, Jun; Jiang, Sha; Li, Da Yong; Liao, Wen Bo

doi:10.13128/acta_herpetol-20920

Cited by 5 publications

(4 citation statements)

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“…Some studies have shown a significant negative correlation between brain size and digestive tract length, thus supporting the ETH (Kaufman, 2003;Jin et al, 2015;Tsuboi et al, 2015;Liao et al, 2016). On the contrary, other studies have found no such relationship or even the opposite (Lemaître et al, 2009;Barrickman and Lin, 2010;Navarrete et al, 2011;Liu et al, 2018). The study of Opsanus tau shows that increased investment in one structure does not necessarily drive a loss of mass in one or more organs (Dornburg et al, 2018).…”

Section: Introductionmentioning

confidence: 83%

“…The relative brain size of Rana omeimontis was significantly negatively correlated with the relative digestive tract length, and energy restriction could explain the change in brain size, thus supporting the ETH (Jin et al, 2015). However, some studies suggested that the relative brain size was not significantly correlated with the relative digestive tract length, and the change in brain size could not be explained by energy restriction, which did not support the ETH (Liao et al, 2016;Liu et al, 2018). Besides, the study found no negative correlation between brain mass and intestinal length, and even no negative correlation was discovered between brain mass and the mass of other organs in Bufo gargarizans (Mi and Liao, 2021).…”

Section: Introductionmentioning

confidence: 88%

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Relationship between brain size and digestive tract length support the expensive-tissue hypothesis in Feirana quadranus

Song

Liu

et al. 2022

Front. Ecol. Evol.

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The brain is among the most energetically costly organs in the vertebrate body, while the size of the brain varies within species. The expensive-tissue hypothesis (ETH) predicts that increasing the size of another costly organ, such as the gut, should compensate for the cost of a small brain. Here, the ETH was tested by analyzing the relationship between brain size variation and digestive tract length in a Swelled-vented frog (Feirana quadranus). A total of 125 individuals across 10 populations ranging from 586 to 1,702 m a.s.l. from the Qinling-Daba Mountains were sampled. With the increase in altitude, the brain size decreases and the digestive tract length increases. Different brain regions do not change their relative size in a consistent manner. The sizes of telencephalon and cerebellum decrease with the increase in altitude, while the olfactory nerve increases its size at high altitudes. However, the olfactory bulb and optic tectum have no significant relationship with altitude. After controlling for snout-vent length (SVL), a significant negative correlation could be found between brain size and digestive tract length in F. quadranus. Therefore, the intraspecific variation of brain size follows the general patterns of ETH in this species. The results suggest that annual mean temperature and annual precipitation are environmental factors influencing the adaptive evolution of brain size and digestive tract length. This study also suggests that food composition, activity times, and habitat complexity are the potential reasons driving the adaptive evolution of brain size and digestive tract length.

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 88%

Relationship between brain size and digestive tract length support the expensive-tissue hypothesis in Feirana quadranus

Song

Liu

et al. 2022

Front. Ecol. Evol.

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“…Moreover, environmental stimuli were found to increase the brain weight of rabbit males [6], probably due to stimulating neurogenesis in the hippocampus [7] or the higher energy requirements of animals [8]. Changes in brain size can also be supported by the expensive-tissue hypothesis, which predicts that the higher the brain size, the lower the size of another costly organ, such as the gut or others [9]. Additionally, the ability to learn tasks is a stimulus of increasing brain size [10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Housing System and Gender on Relative Brain Weight, Body Temperature, Hematological Traits, and Bone Quality in Muscovy Ducks

Krunt

Kraus

Zita

et al. 2022

Animals

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The study was conducted during the summer season (June–August 2020). Two hundred sixty-four 5-week-old sexed Muscovy ducklings were randomly divided into four equal experimental groups by housing system and by gender. Each group had three replicates (22 birds/replicate) in a randomized design experiment. Regarding the hematological traits, the volume of leukocytes was higher in the D group (by 0.34 × 109/L; p < 0.05) than in the S group. Furthermore, body temperature was found to be higher in ducks (by 0.84 °C; p < 0.05) and in the D group (by 0.5 °C; p < 0.05) in comparison with drakes and birds from the S group. Considering relative brain weight, drakes had higher values than ducks (by 0.56 g; p < 0.05), and birds from the S group also manifested higher values (by 0.78 g; p < 0.05). In terms of bone quality, there were no differences in studied parameters of tibia and femur bones regarding housing systems. The results provide valuable evidence of differences in the fattening of intensively bred Muscovy ducks within the housing system but also regarding gender.

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“…This species lives in pools, ditches, paddy fields and freshwater body (Wu et al, 2014), playing important roles in pest control as well as aquatic and terrestrial food webs (Shao et al, 2018). Its breeding season starts from March to June with the proportion of females and males 1:2.02 (Liu et al, 2018;Zou et al, 2003). The breeding males have swollen nuptial pads on thumb, whereas females have mature oocytes (Zou et al, 2003).…”

mentioning

confidence: 99%

Exploring sexual differences in external morphology and limb muscles of Hylarana guentheri (Anura: Ranidae) during non‐breeding season

Chen

Jiang

et al. 2022

Acta Zoologica

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Studying sexual dimorphism facilitates better understanding of the general intersexual divergence of the same species and gives insights into the impact of selective forces on each sex. The sexual dimorphism in anuran external morphology or limb muscles has been well studied in reproductive context, but less so outside the breeding season. Herein, the intersexual differences in 12 external morphological characteristics, 11 forelimb and 12 hindlimb muscles of Hylarana guentheri during non‐breeding season were investigated. We found that the males possessed significantly greater head width and tympanum diameter, while the females had significantly larger body size and head length; there was no sexual differences in the examined limb muscles, except for the mass of flexor carpi radialis. The larger body size means greater fertility for the females, and the longer head may be related to the allometry and reduce resource competition. For the males, the wider head is likely correlated with prey size and male–male competition, and also, the larger tympanum and heavier flexor carpi radialis probably aid the productive success. This study provides the comprehensive morphological accounts about the sexual differences of H. guentheri during non‐breeding season, which will contribute to clarify the sex‐specific resource allocation and reproductive strategies of anurans.

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The relationship between brain size and digestive tract length do not support expensive-tissue hypothesis in Hylarana guentheri

Cited by 5 publications

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Relationship between brain size and digestive tract length support the expensive-tissue hypothesis in Feirana quadranus

Relationship between brain size and digestive tract length support the expensive-tissue hypothesis in Feirana quadranus

The Effect of Housing System and Gender on Relative Brain Weight, Body Temperature, Hematological Traits, and Bone Quality in Muscovy Ducks

Exploring sexual differences in external morphology and limb muscles of Hylarana guentheri (Anura: Ranidae) during non‐breeding season

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