检索结果-南通市图书馆

No association between brain size and male sexual behavior in the guppy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2015年第2期61卷 265-273页

作者： Alberto CORRAL-LOPEZ Simon ECKERSTROM-LIEDHOLM Wouter VAN DER BIJL Alexander KOTRSCHAL Niclas KOLM Department of Zoology/Ethology Stockholm University Svante Arrhenius v~ig 18B. SE-10691 Stockholm Sweden

Animal behavior is remarkably variable at all taxonomic levels. Over the last decades, research on animal behavior has focused on understanding ultimate processes. Yet, it has progressively become more evident that to fully understand beha- vioral variation, ultimate explanations need to be complemented with proximate ones. In particular, the mechanisms generating variation in sexual behavior remain an open question. Variation in aspects of brain morphology has been suggested as a plausible mechanism underlying this variation. However, our knowledge of this potential association is based almost exclusively on com- parative analyses. Experimental studies are needed to establish causality and bridge the gap between micro- and macroevolutio- nary mechanisms concerning the link between brain and sexual behavior. We used male guppies that had been artificially selected for large or small relative brain size to study this association. We paired males with females and scored the full known set of male and female sexual behaviors described in guppies. We found several previously demonstrated associations between male traits, male behavior and female behavior. Females responded more strongly towards males that courted more and males with more orange coloration. Also, larger males and males with less conspicuous coloration attempted more coerced copulations. However, courting, frequency of coerced copulation attempts, total intensity of sexual behavior, and female response did not differ between large- and small-brained males. Our data suggest that relative brain size is an unlikely mechanism underlying variation in sexual behavior of the male guppy. We discuss these findings in the context of the conditions under which relative brain size might affect male sexual behavior .

关键词： brain size brain morphology Sexual behavior Guppy Artificial selection Behavioral mechanisms

Relative brain size decreases with avivory in diurnal raptors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Relative brain size decreases with avivory in diurnal raptor...

Large-brained birds lay smaller but heavier clutches

23rd International Ornithological Congress

作者： Andrew N.Iwaniuk Dept. Biological Sciences Monash University Clayton Victoria 3168 Australia andrew

＜正＞ Interspecific differences in behavior and ecology have been thought relatively unimportant in the evolution of brain size in birds. Rather, developmental mode is commonly considered the primary determinant. By examining interspecific variation in relative brain size within taxa that share the same developmental mode, possible relationships with behavioral and/or ecological traits can be tested. Here I present data on brain size in over 30 species of diurnal raptors （Accipitridae, Falconidae） and compare interspecific variation in brain size to

关键词： brain size comparative method diet prey capture

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Avian Research 2023年第3期14卷 460-466页

作者： Shaobin Li Xiaoman Liu Guopan Li Xiaolong Du College of Life Science Yangtze UniversityJingzhou40025China

The brain is among the most energetically costly organs in vertebrates,and thus trade-offs have been hypothesized to exert constraints on brain size *** energy trade-off hypothesis(ETH) predicts that reducing the energy consumption of reproduction or other costly tissues should compensate for the cost of a large *** production in birds requires a large proportion of the total energy budget,and a clutch mass in some bird species can outweigh the body mass of the *** date,this hypothesis has mainly been tested in mammals and ectothermic animals such as anurans and *** collated data on adult brain size,body mass and eggproduction traits such as clutch size,egg mass and annual broods from published studies,and conducted a phylogenetic comparative test of the interplay between egg-production investment and brain size evolution across bird *** controlling for phylogenetic relationships and body size,we find a negative correlation between brain size and clutch size across 1395 species,which favored ***,when egg mass was integrated in models,positive associations were detected between brain size and mass of eggs(via egg mass,clutch mass and annual total egg mass).Our results suggest that brain size trades off against egg-production only via certain aspects(e.g.,clutch size).By contrast,a positive relationship between brain size and total egg reproduction(e.g.,clutch mass and annual total egg mass) implied increased total energy budget outweighing energy allocation across bird *** study shows that there is no general energy trade-off between brain size and eggreproduction investment,and suggests that brain size evolution follows mixed strategies across bird species.

关键词： brain size Breeding attempts Clutch size Comparative analysis Egg mass Reproduction investment Trade-off

Adaptation in brain structure and respiratory and olfactory structures across environmental gradients in African and North American muroid rodents

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2024年第1期19卷 165-181页

作者： Peter J.TAYLOR Aluwani NENGOVHELA Christiane DENYS Graham R.SCOTT Catherine M.IVY Department of Zoology School of Natural and Mathematical SciencesUniversity of VendaThohoyandouSouth Africa Afromontane Unit Department of Zoology and EntomologyUniversity of the Free StatePhuthaditjhabaSouth Africa Department of Mammalogy National MuseumBloemfonteinSouth Africa Institut de Systématique EvolutionBiodiversité(ISYEB)Muséum National d’Histoire NaturelleCNRSSorbonne UniversitéEPHEUniversitéDes AntillesParisFrance Department of Biology McMaster UniversityHamiltonOntarioCanada Guglielmo and Shoemaker Labs Advanced Facility for Avian ResearchUniversity of Western OntarioLondonOntarioCanada

Morphometric studies of 3D micro CT-scanned images can provide insights into the evolution of the brain and sensory structures but such data are still scarce for the most diverse mammalian order of *** reviewed and new data,we tested for convergence to extreme aridity and high elevation in the sensory and brain morphology of rodents,from morphometric data from micro-CT X-ray scans of 174 crania of 16 species of three distantly re-lated African murid(soft-furred mice,Praomyini,laminate-toothed rats,Otomyini,and gerbils,Gerbillinae)clades and one North American cricetid(deer mice and white-footed mice,Peromyscus)*** studies demon-strated convergent evolution acting on the oval window area of the cochlea(enlarged in extremely arid-adapted species of Otomyini and Gerbillinae)and on endocranial volume(reduced in high elevation taxa of Otomyini and Peromyscus).However,contrary to our predictions,we did notfind evidence of convergence in brain struc-ture to aridity,or in the olfactory/respiratory system(turbinate bones)to high *** structure differed,particularly in the petrosal lobules of the cerebellum and the olfactory bulbs,between Otomyini and Gerbillinae,with extreme arid-adapted species in each clade being highly divergent(not convergent)from other species in the same *** observed greater“packing”of the maxillary turbinate bones,which have important respiratory functions,in Peromyscus mice from high and low elevations compared to the high-elevation African Praomyini,but more complex patterns within Peromyscus,probably related to trade-offs in respiratory physiology and heat exchange in the nasal epithelium associated with high-elevation adaptation.

关键词： 3D morphometrics Africa brain size North America Rodentia sensory evolution

Large-brained birds display lower extra-pair paternity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2023年第2期18卷 278-288页

作者： Yating LIU Zhengjun WU Wenbo LIAO Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection Ministry of EducationGuangxi Normal UniversityGuilinChina Guangxi Key Laboratory of Rare and Endangered Animal Ecology Guangxi Normal UniversityGuilinChina Key Laboratory of Southwest China Wildlife Resources Conservation(Ministry of Education) China West Normal UniversityNanchongChina

Extra-pair paternity(EPP)beneﬁts to improve the reproductive success via extra-pair fertilizations without the costs of parental care in males and through improved offspring quality with additional food and parental care in females among species of *** in the EPP appear to link to behavioral and ecological factors and sexual *** to the“relationship intelligence hypothesis”,the cognitive abilities of the birds play an important role in maintaining long-term ***,we undertook theﬁrst comparative test of the relationships between extra-pair paternity and brain size,testis size,and life histories among 315 species of birds using phylogenetically controlled comparative analyses and path *** controlling for the effects of shared ancestry and body mass,the frequency of EPP was negatively correlated with relative brain size,but positively with testis size across species of ***,the frequency of EPP was not linked to life-history traits(*** period,ﬂedging period,clutch size,egg mass,and longevity).Ourﬁndings suggest that large-brained birds associated with enhanced cognitive abilities are more inclined to maintain long-term stable relationships with their mates and to mutualism with them than to increase the frequency of EPP.

关键词： brain size cognitive ability extra-pair paternity life history sexual selection

brain weight predicts yawn duration across domesticated dog breeds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2020年第4期66卷 401-405页

作者： Andrew C.Gallup Lea Moscatello Jorg J.M.Massen Psychology Program Department of Social and Behavioral SciencesSUNY Polytechnic InstituteUticaNY13502USA Department of Psychology SUNY College at OneontaOneontaNY13820USA Animal Ecology Group Department of BiologyUtrecht UniversityPadualaan 8Utrecht CH3584The Netherlands

Previous research shows that yawning enhances intracranial circulation and regulates brain temperature. Consistent with these functional outcomes, yawn duration correlates positively with interspecies variation in brain weight across mammals, with robust relationships documented at both the taxonomic rank of class and the more restricted scale of family (e.g., Felidae). This study provides the first investigation into whether differences in brain weight within a single species, domesticated dogs Canis lupus familiaris, can predict intraspecific variation in yawn duration. Measures of yawn duration were obtained from public videos available online and then paired with previously published brain and body weight data of different dog breeds. The final sample consisted of 272 yawns from 198 dogs across 23 breeds. Consistent with recent studies, we find robust correlations between yawn duration and brain weight across breeds. Moreover, these correlations remain significant after controlling for differences in body weight across breeds. These findings replicate and extend upon past work in this area and provide further support that yawns evolved to serve an important and large-scale neurophysiologic function.

关键词： brain cooling brain size cortical arousal neuroanatomy