Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda: Octopodoidea)

Christian M. Ibáñez, Enrico L. Rezende, Roger D. Sepúlveda, Jorge Avaria-Llautureo, Cristián E. Hernández, Javier Sellanes, Elie Poulin, M. Cecilia Pardo-Gandarillas

Resultado de la investigación: Article

5 Citas (Scopus)

Resumen

Here, we evaluate the so-called Thorson's rule, which posits that direct-development and larger eggs are favored toward the poles in marine organisms and whose validity been the subject of considerable debate in the literature, combining an expanded phenotypic dataset encompassing 60 species of benthic octopuses with a new molecular phylogeny. Phylogenetic reconstruction shows two clades: clade 1 including species of the families Eledonidae, Megaleledonidae, Bathypolypodidae, and Enteroctopodidae, and clade 2 including species of Octopodidae. Egg size, development mode, and all environmental variables exhibited phylogenetic signal, partly due to differences between the two clades: whereas most species in clade 1 inhabit cold and deep waters, exhibit large eggs and hatchling with holobenthic development, species from clade 2 inhabit tropical-temperate and shallow waters, evolved small eggs, and generally exhibit merobenthic development. Phylogenetic regressions show that egg size exhibits a conspicuous latitudinal cline, and that both egg size and development mode vary with water temperature. Additionally, analyses suggest that egg size is constrained by body size in lineages with holobenthic development. Taken together, results suggest that the variation in egg size and development mode across benthic octopuses is adaptive and associated with water temperature, supporting Thorson's rule in these organisms.

Idioma originalEnglish
Páginas (desde-hasta)1829-1839
Número de páginas11
PublicaciónEvolution
Volumen72
N.º9
DOI
EstadoPublished - 1 sep 2018

Huella dactilar

Cephalopoda
Octopodiformes
Octopodidae
egg size
Ovum
life history
phylogeny
Eggs
egg development
Water
egg
water temperature
phylogenetics
organisms
Aquatic Organisms
Temperature
cline
Body Size
Phylogeny
cold water

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Agricultural and Biological Sciences(all)

Citar esto

Ibáñez, C. M., Rezende, E. L., Sepúlveda, R. D., Avaria-Llautureo, J., Hernández, C. E., Sellanes, J., ... Pardo-Gandarillas, M. C. (2018). Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda: Octopodoidea). Evolution, 72(9), 1829-1839. https://doi.org/10.1111/evo.13559
Ibáñez, Christian M. ; Rezende, Enrico L. ; Sepúlveda, Roger D. ; Avaria-Llautureo, Jorge ; Hernández, Cristián E. ; Sellanes, Javier ; Poulin, Elie ; Pardo-Gandarillas, M. Cecilia. / Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda : Octopodoidea). En: Evolution. 2018 ; Vol. 72, N.º 9. pp. 1829-1839.
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Ibáñez, CM, Rezende, EL, Sepúlveda, RD, Avaria-Llautureo, J, Hernández, CE, Sellanes, J, Poulin, E & Pardo-Gandarillas, MC 2018, 'Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda: Octopodoidea)', Evolution, vol. 72, n.º 9, pp. 1829-1839. https://doi.org/10.1111/evo.13559

Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda : Octopodoidea). / Ibáñez, Christian M.; Rezende, Enrico L.; Sepúlveda, Roger D.; Avaria-Llautureo, Jorge; Hernández, Cristián E.; Sellanes, Javier; Poulin, Elie; Pardo-Gandarillas, M. Cecilia.

En: Evolution, Vol. 72, N.º 9, 01.09.2018, p. 1829-1839.

Resultado de la investigación: Article

TY - JOUR

T1 - Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda

T2 - Octopodoidea)

AU - Ibáñez, Christian M.

AU - Rezende, Enrico L.

AU - Sepúlveda, Roger D.

AU - Avaria-Llautureo, Jorge

AU - Hernández, Cristián E.

AU - Sellanes, Javier

AU - Poulin, Elie

AU - Pardo-Gandarillas, M. Cecilia

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N2 - Here, we evaluate the so-called Thorson's rule, which posits that direct-development and larger eggs are favored toward the poles in marine organisms and whose validity been the subject of considerable debate in the literature, combining an expanded phenotypic dataset encompassing 60 species of benthic octopuses with a new molecular phylogeny. Phylogenetic reconstruction shows two clades: clade 1 including species of the families Eledonidae, Megaleledonidae, Bathypolypodidae, and Enteroctopodidae, and clade 2 including species of Octopodidae. Egg size, development mode, and all environmental variables exhibited phylogenetic signal, partly due to differences between the two clades: whereas most species in clade 1 inhabit cold and deep waters, exhibit large eggs and hatchling with holobenthic development, species from clade 2 inhabit tropical-temperate and shallow waters, evolved small eggs, and generally exhibit merobenthic development. Phylogenetic regressions show that egg size exhibits a conspicuous latitudinal cline, and that both egg size and development mode vary with water temperature. Additionally, analyses suggest that egg size is constrained by body size in lineages with holobenthic development. Taken together, results suggest that the variation in egg size and development mode across benthic octopuses is adaptive and associated with water temperature, supporting Thorson's rule in these organisms.

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KW - Egg size

KW - holobenthic

KW - life histories

KW - macroevolution

KW - merobenthic

KW - phylogeny

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Ibáñez CM, Rezende EL, Sepúlveda RD, Avaria-Llautureo J, Hernández CE, Sellanes J y otros. Thorson's rule, life-history evolution, and diversification of benthic octopuses (Cephalopoda: Octopodoidea). Evolution. 2018 sep 1;72(9):1829-1839. https://doi.org/10.1111/evo.13559