{"title":"Life-History Analysis of Asterinid Starfishes.","authors":"Thomas A Ebert","doi":"10.1086/716913","DOIUrl":null,"url":null,"abstract":"<p><p>AbstractThe starfish family Asterinidae shows a diversity of reproductive modes, and a number of species have sufficient life-history data that can be used for analysis, using life-cycle graphs. These include four species that reproduce by fission (<i>Aquilonastra yairi</i>, <i>Nepanthia belcheri</i>, <i>Aquilonastra burtonii</i>, and <i>Ailsastra heteractis</i>), a viviparous species (<i>Parvulastra vivipara</i>), two species with benthic egg masses (<i>Asterina gibbosa</i> and <i>Asterina phylactica</i>), one with planktonic larvae that do not feed (<i>Cryptasterina pentagona</i>), and one with larvae that feed in the plankton (<i>Patiria miniata</i>). Species are compared using adult and first-year survival and, for some species, the age at first reproduction, number of offspring (eggs or newly released juveniles), and individual growth parameters of the von Bertalanffy model. The sensitivity of population growth, fitness, to changes in these traits is shown by elasticity analysis, which aids in understanding possible consequences of environmental forces as well as possible directions of selection.</p>","PeriodicalId":55376,"journal":{"name":"Biological Bulletin","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biological Bulletin","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1086/716913","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2021/11/17 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"BIOLOGY","Score":null,"Total":0}
引用次数: 2
Abstract
AbstractThe starfish family Asterinidae shows a diversity of reproductive modes, and a number of species have sufficient life-history data that can be used for analysis, using life-cycle graphs. These include four species that reproduce by fission (Aquilonastra yairi, Nepanthia belcheri, Aquilonastra burtonii, and Ailsastra heteractis), a viviparous species (Parvulastra vivipara), two species with benthic egg masses (Asterina gibbosa and Asterina phylactica), one with planktonic larvae that do not feed (Cryptasterina pentagona), and one with larvae that feed in the plankton (Patiria miniata). Species are compared using adult and first-year survival and, for some species, the age at first reproduction, number of offspring (eggs or newly released juveniles), and individual growth parameters of the von Bertalanffy model. The sensitivity of population growth, fitness, to changes in these traits is shown by elasticity analysis, which aids in understanding possible consequences of environmental forces as well as possible directions of selection.
期刊介绍：
The Biological Bulletin disseminates novel scientific results in broadly related fields of biology in keeping with more than 100 years of a tradition of excellence. The Bulletin publishes outstanding original research with an overarching goal of explaining how organisms develop, function, and evolve in their natural environments. To that end, the journal publishes papers in the fields of Neurobiology and Behavior, Physiology and Biomechanics, Ecology and Evolution, Development and Reproduction, Cell Biology, Symbiosis and Systematics. The Bulletin emphasizes basic research on marine model systems but includes articles of an interdisciplinary nature when appropriate.
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