Brain size evolution in anurans: a review

Animal Biology, Journal Year: 2019, Volume and Issue: 69(3), P. 265 - 279

Published: Jan. 1, 2019

Abstract Selection pressure is an important force in shaping the evolution of vertebrate brain size among populations within species as well between species. The tightly linked to natural and sexual selection, life-history traits. In particular, increased environmental stress, intensity slower life history usually result enlarged brains. However, although previous studies have addressed causes evolution, no systematic reviews been conducted explain anurans. Here, we review whether supports cognitive buffer hypothesis (CBH), expensive tissue (ETH), or developmental cost (DCH) by analyzing intraspecific and/or interspecific patterns regions (i.e., olfactory nerves, bulbs, telencephalon, optic tectum, cerebellum) associated with ecological factors (habitat, diet predator risk), selection intensity, traits (age at maturity, mean age, longevity, clutch egg size, testis sperm length), other energetic organs. Our findings suggest that anurans CBH, ETH DCH. We also future directions for studying relationships crypsis ordinary mucous glands skin), food alteration different stages.

Language: Английский

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Genome size variation is associated with life‐history traits in birds

Journal of Zoology, Journal Year: 2019, Volume and Issue: 310(4), P. 255 - 260

Published: Dec. 25, 2019

Abstract Genome size markedly displays variation across taxa. is affected by two principally different mechanisms (such as whole‐genome duplication events (polyploidization) and accumulation of noncoding elements). In addition, genome also the phylogenetic signal, life‐history traits environmental factors. Here, we studied relationships between (e.g. clutch size, hatching time, fledging age at sexual maturity, longevity body mass) among 240 species birds using a comparative analysis path analysis. We found that was positively correlated with both mass time. maturity in birds. Our findings suggest although directly linked to mass, evolution larger genomes associated bodies prolonged

Language: Английский

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Investigating the role of body size, ecology, and behavior in anuran eye size evolution

Evolutionary Ecology, Journal Year: 2019, Volume and Issue: 33(4), P. 585 - 598

Published: June 3, 2019

Language: Английский

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Socio-ecological context modulates significance of territorial contest competition inDrosophila prolongata

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: April 26, 2024

Abstract The intensity and direction of sexual selection is intricately linked to the social ecological context. Both operational sex ratios (OSRs) population densities can affect ability males monopolize resources mates, thus form on them. Here, we studied how mating system promiscuous strongly sexually dimorphic fruit fly Drosophila prolongata responds changes in OSR density. We recorded groups flies over five days quantified territory occupancy, success, competitive fertilization success. Although was stronger under male-biased than even OSRs but unrelated density, realized morphological traits higher increased with Larger more territorial achieved both success only OSRs. Our combined results also support a shift from contest competition scramble potentially at low where there no clear contribution measured reproductive study emphasizes limitations traditional metrics role socio-ecological context predicting adaptation changing environment. Significance Mating systems are complex dynamic, adapting ongoing change. Studies often assume that alter indicating individual fitness, our work challenges this view. By manipulating ratio jointly investigating behavior pre- post-mating several days, reveal plastic strategies fly. This dynamism underscores static classifications importance studying across diverse contexts. broader perspective advances understanding tight connections between environmental change, demographics, evolutionary process.

Language: Английский

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Altitudinal implications in organ size in the Andrew’s toad (Bufo andrewsi)

Animal Biology, Journal Year: 2019, Volume and Issue: 69(3), P. 365 - 376

Published: Jan. 1, 2019

Abstract Phenotypic flexibility of morphological and physiological traits within species is a common phenomenon across animal taxa. Hesse’s rule predicts that the size an organ should exhibit increase with increasing altitude along environmental gradients due to changes in oxygen supply energy demands. Here, we test prediction by investigating geographical variation relative organs (i.e., heart, lungs, liver, kidneys) ten populations Bufo andrewsi gradient. We found these four specific did not or latitude all populations. also find increased among six located at similar longitude, which inconsistent rule. Our findings suggest demands do necessarily affect

Language: Английский

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Brain size evolution in small mammals: test of the expensive tissue hypothesis

Mammalia, Journal Year: 2021, Volume and Issue: 85(5), P. 455 - 461

Published: May 20, 2021

Abstract Brain size exhibits significant changes within and between species. Evolution of large brains can be explained by the need to improve cognitive ability for processing more information in changing environments. However, are among most energetically expensive organs. Enlarged impose energetic demands that limit brain evolution. The tissue hypothesis (ETH) states a decrease another tissue, such as gut, should compensate cost brain. We studied interplay limitations evolution small mammals using phylogenetically generalized least squares (PGLS) regression analysis. mass was not correlated with length digestive tract 37 species after correcting phylogenetic relationships body effects. further found accompanied male reproductive investments into testes female investment offspring number. is inconsistent prediction ETH.

Language: Английский

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Investigating the role of life-history traits in mammalian genomes

Animal Biology, Journal Year: 2019, Volume and Issue: 70(2), P. 121 - 130

Published: Sept. 18, 2019

Abstract Genome size evolution has intrigued many evolutionary biologists. Ultimately, the reasons that genomes have become large are proliferation of non-coding elements and/or duplication events. The proximate causes related to phylogeny, life-history traits and environmental factors. in mammals exhibits little interspecific variation compared with other taxa. patterns shaped by phylogeny or largely unknown for mammals. Here, a dataset 121 species mammals, we studied variations genome associated life history using comparative quantitative analysis. results showed was positively body size, but not four (i.e., gestation period, weaning age, litter longevity) these species. For Primates, Rodentia Chiroptera, correlated traits. Our suggest may result from increased cell thus facilitate bodies.

Language: Английский

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Frogs with denser group-spawning mature later and live longer

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Sept. 24, 2019

The understanding of the intrinsic and extrinsic causes longevity variation has deservedly received much attention in evolutionary ecologist. Here we tested association between spawning-site groups across 38 species Chinese anurans. As indicators group-spawning used group size density, which measured at 152 spawning sites field. We found that both density were positively associated with longevity. Male (e.g., male size) was also correlated A phylogenetic path analysis further revealed seems directly size, part depend on 'groups-spawning-age first reproduction' association. Our findings suggest increased are likely to benefit declining mortality rates living longer through improving total anti-predator behaviour under predation pressure.

Language: Английский

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