{"title":"个体内协变量掩盖了草原蜥蜴个体间的绩效权衡","authors":"K. L. Lang, M. E. Gifford","doi":"10.1111/jzo.13104","DOIUrl":null,"url":null,"abstract":"<p>To understand fitness consequences of performance, one must determine how underlying physiological traits result in and constrain performance. Biochemical and mechanistic investment in a performance trait may cause decreased performance elsewhere: a performance tradeoff, indicating performance specialization in a population. (Co)variation exists within individuals, and among individuals, populations, and species. Conflicting patterns of among-individual and within-individual covariation may eliminate, or mask, the relationship at the phenotypic level. Multivariate mixed-effects models (MMMs) model within-individual and among-individual variation separately. We used MMMs to test for relationships between physiological and performance traits associated with locomotion in the prairie lizard <i>Sceloporus consobrinus</i>, and tested for tradeoffs at multiple hierarchical levels. We then compared these results to the conventional Pearson correlations. We found a significant among-individual tradeoff between endurance and climbing speed. Positive covariation within individuals masked the tradeoff at the phenotypic level. Sprint speed positively covaried with climbing speed. Excluding anaerobic scope, which was associated with endurance, no measured physiological traits were predictive of locomotor performance. These data indicate that performance specialization exists among prairie lizards and contribute to a growing body of literature that have successfully used MMMs to uncover performance tradeoffs which may have been masked using conventional methods.</p>","PeriodicalId":17600,"journal":{"name":"Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Within-individual covariation masks an among-individual performance tradeoff in the prairie lizard\",\"authors\":\"K. L. Lang, M. E. Gifford\",\"doi\":\"10.1111/jzo.13104\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>To understand fitness consequences of performance, one must determine how underlying physiological traits result in and constrain performance. Biochemical and mechanistic investment in a performance trait may cause decreased performance elsewhere: a performance tradeoff, indicating performance specialization in a population. (Co)variation exists within individuals, and among individuals, populations, and species. Conflicting patterns of among-individual and within-individual covariation may eliminate, or mask, the relationship at the phenotypic level. Multivariate mixed-effects models (MMMs) model within-individual and among-individual variation separately. We used MMMs to test for relationships between physiological and performance traits associated with locomotion in the prairie lizard <i>Sceloporus consobrinus</i>, and tested for tradeoffs at multiple hierarchical levels. We then compared these results to the conventional Pearson correlations. We found a significant among-individual tradeoff between endurance and climbing speed. Positive covariation within individuals masked the tradeoff at the phenotypic level. Sprint speed positively covaried with climbing speed. Excluding anaerobic scope, which was associated with endurance, no measured physiological traits were predictive of locomotor performance. These data indicate that performance specialization exists among prairie lizards and contribute to a growing body of literature that have successfully used MMMs to uncover performance tradeoffs which may have been masked using conventional methods.</p>\",\"PeriodicalId\":17600,\"journal\":{\"name\":\"Journal of Zoology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2023-08-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Zoology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jzo.13104\",\"RegionNum\":3,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ZOOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Zoology","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jzo.13104","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ZOOLOGY","Score":null,"Total":0}
Within-individual covariation masks an among-individual performance tradeoff in the prairie lizard
To understand fitness consequences of performance, one must determine how underlying physiological traits result in and constrain performance. Biochemical and mechanistic investment in a performance trait may cause decreased performance elsewhere: a performance tradeoff, indicating performance specialization in a population. (Co)variation exists within individuals, and among individuals, populations, and species. Conflicting patterns of among-individual and within-individual covariation may eliminate, or mask, the relationship at the phenotypic level. Multivariate mixed-effects models (MMMs) model within-individual and among-individual variation separately. We used MMMs to test for relationships between physiological and performance traits associated with locomotion in the prairie lizard Sceloporus consobrinus, and tested for tradeoffs at multiple hierarchical levels. We then compared these results to the conventional Pearson correlations. We found a significant among-individual tradeoff between endurance and climbing speed. Positive covariation within individuals masked the tradeoff at the phenotypic level. Sprint speed positively covaried with climbing speed. Excluding anaerobic scope, which was associated with endurance, no measured physiological traits were predictive of locomotor performance. These data indicate that performance specialization exists among prairie lizards and contribute to a growing body of literature that have successfully used MMMs to uncover performance tradeoffs which may have been masked using conventional methods.
期刊介绍:
The Journal of Zoology publishes high-quality research papers that are original and are of broad interest. The Editors seek studies that are hypothesis-driven and interdisciplinary in nature. Papers on animal behaviour, ecology, physiology, anatomy, developmental biology, evolution, systematics, genetics and genomics will be considered; research that explores the interface between these disciplines is strongly encouraged. Studies dealing with geographically and/or taxonomically restricted topics should test general hypotheses, describe novel findings or have broad implications.
The Journal of Zoology aims to maintain an effective but fair peer-review process that recognises research quality as a combination of the relevance, approach and execution of a research study.