Further genetic evidence for the reproductive isolation of green sea anemone Actinia prasina Gosse from common intertidal beadlet anemone Actinia equina (L.)

Solé‐Cava, Antônio M.; Thorpe, J. P.

doi:10.3354/meps038225

Cited by 20 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Allcock, Watts, & Thorpe, 1998;Manchenko, Dautova, & Latypov, 2000;Watts, Allcock, Lynch, & Thorpe, 2000), while other attempts did not find statistical support to clearly separate species or morphotypes based on cnidae size differences (e.g. Solé-Cava & Thorpe, 1987;Chintiroglou & Karalis, 2000;González-Muñoz et al, 2015;González-Muñoz, Garese, Tello-Musi, & Acuña, 2017).…”

mentioning

confidence: 90%

Comparison of cnidae sizes between the two morphotypes of the giant Caribbean sea anemone Condylactis gigantea (Actiniaria: Actiniidae)

Muñoz

Hernández-Ortíz

Garese

et al. 2018

RBT

View full text Add to dashboard Cite

The sea anemone Condylactis gigantea is an ecologically important member of the benthic community in coral reefs of the tropical Atlantic, and displays two morphotypes with respect to the color in their tentacular tips: the green tip morphotype and the pink/purple tip morphotype. Although some molecular and ecological differences have been found between these morphotypes, no other morphological distinctions have been reported, and currently both are still considered a single taxonomic species. In the present study, we perform an exploration on the variability in the size of cnidae between these two morphotypes and performed statistical analyses to compare the 10 categories of cnidae from specimens hosted in the Cnidarian Collection of Gulf of Mexico and Mexican Caribbean, of the Universidad Nacional Autónoma de México, which were previously collected in several coral reefs localities of the Yucatán Peninsula. Results reveal no significant variation in cnidae size between the two morphotypes, but significant variations were found within each morphotype. In addition, we update the composition of the cnidom of C. gigantea, and the utility of the size of cnidae to distinguish between morphotypes or closely related species is discussed.

show abstract

mentioning

confidence: 90%

Comparison of cnidae sizes between the two morphotypes of the giant Caribbean sea anemone Condylactis gigantea (Actiniaria: Actiniidae)

Muñoz

Hernández-Ortíz

Garese

et al. 2018

RBT

View full text Add to dashboard Cite

show abstract

“…prusinu and Actiniu sp., however, the situation may be quite different. These species can reach high densities in the intertidal zone (Haylor, Thorpe & Carter, 1984), but the levels of genetic differentiation between local populations can be very high (SolC-Cava & Thorpe, 1987). Subdivisions of natural populations into more or less isolated units produces a decrease in effective population size (Kimura, 1983).…”

Section: Population Size and Heterozygositymentioning

confidence: 99%

High levels of genetic variation in natural populations of marine lower invertebrates

Solé‐Cava¹,

Thorpe²

1991

Biological Journal of the Linnean Society

View full text Add to dashboard Cite

The predictions of neutralist and selectionist hypotheses have been tested many times in the past, but mostly using data only from organisms such as vertebrates, with generally low to average heterozygosities. The more recent discovery of particularly high levels of genetic variation in marine sponges and coelenterates provides an opportunity to use data from such species to contribute further to the understanding of the determinants of heterozygosity in natural populations. Therefore, 23 species of sponges and coelenterates from temperate, tropical and boreal waters were analysed by gel electrophoresis for an average of 14.3 enzyme loci per species.Mean heterozygosity values for each species were unusually high, ranging between 0.106 and 0.401. The means and variances of the heterozygosity estimates showed reasonable correlation with neutralist predictions (with both the stepwise mutation and the infinite alleles models). Population sizes were generally difficult to estimate with any confidence, but, for one sponge species for which this was possible, levels of heterozygosity again were similar to neutralist predictions, although the same was not apparently true for three species of sea anemone. No differences were found between heterozygosity levels of tropical and temperate species of sponges and coelenterates, thus apparently contradicting the selectionist 'trophic resource stability' and 'temporal environmental variation' hypotheses. Conversely, however, the consistently high levels of genetic variation found in coelenterates and sponges may be argued to be related to common biological characteristics, such as sessile life, great evolutionary 'age', limited ability to disperse and probable low homoeostatic capability.Our results seem, overall, to agree well with neutralist expectations for species with large, stable population sizes. Also, the mean heterozygosities, their variances and the observed and expected proportions of polymorphic loci seem to fit well with predictions based on the neutralist hypothesis. However, the selectionist 'environmental grain' and the 'shifting balance' hypotheses fit the data equally well. As with much earlier work, the problems in distinguishing between the various predictions of selectionist or neutralist ideas make it both difficult and unwise to draw definite conclusions.

show abstract

“…prasina (Sole-Cava and Thorpe, 1987) although see Schama et al (2005), but additional cryptic species perhaps also exist, particularly those morphotypes that differ in the colour of the pedal disc (grey/green versus red/pink/orange). These morphotypes show clear differences in intertidal distribution (red/pink morphs are found higher up the shore with green/grey morphs lower down the intertidal zone) and have been shown to present diagnostic allozyme genotypes at both malate dehydrogenase and hexokinase loci (Quicke and Brace, 1984;Quicke et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

Morphotypes of the common beadlet anemone Actinia equina (L.) are genetically distinct

Wilding

Weedall

2019

Journal of Experimental Marine Biology and Ecology

View full text Add to dashboard Cite

Further genetic evidence for the reproductive isolation of green sea anemone Actinia prasina Gosse from common intertidal beadlet anemone Actinia equina (L.)

Cited by 20 publications

References 15 publications

Comparison of cnidae sizes between the two morphotypes of the giant Caribbean sea anemone Condylactis gigantea (Actiniaria: Actiniidae)

Comparison of cnidae sizes between the two morphotypes of the giant Caribbean sea anemone Condylactis gigantea (Actiniaria: Actiniidae)

High levels of genetic variation in natural populations of marine lower invertebrates

Morphotypes of the common beadlet anemone Actinia equina (L.) are genetically distinct

Contact Info

Product

Resources

About