IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Developmental plasticity in a meristic character: the number of tentacles in the lophophore of a bryozoan species
Amui-Vedel, A.-M.; Clancy, L.; Arthur, W. (2011). Developmental plasticity in a meristic character: the number of tentacles in the lophophore of a bryozoan species. Biol. J. Linn. Soc. 104(3): 541-551.
In: Biological Journal of the Linnean Society. Academic Press: London; New York. ISSN 0024-4066, more
Peer reviewed article  

Available in  Authors 

    Adaptations; Body size; Lophotrochozoa; Marine
Author keywords
    adaptiveness; body size; Lophotrochozoa; polyphenism; reaction norm

Authors  Top 
  • Amui-Vedel, A.-M.
  • Clancy, L.
  • Arthur, W.

    There is increasing interest among evolutionary biologists in developmental plasticity. Previously ignored by many as being irrelevant to evolution because a plastic response to an environmental change is not inherited, the current, more positive, view of plasticity focuses on the fact that, although any individual plastic response is nonheritable, the overall pattern of developmental response to environmental variation (i.e. the developmental reaction norm) is heritable and may vary among genotypes within a population. Characters subject to plastic variation, like those that are entirely genetically determined, may vary in continuous, meristic or discrete ways. Of these, the least work has been carried out on meristic variation. In the present study, we contribute to the rectification of this imbalance by examining the plastic response of the number of tentacles in the lophophore of a species of bryozoan, Membranipora membranacea, to three environmental variables: temperature, salinity and food concentration. Because the approach taken was an experimental one, unlike the majority of studies of bryozoan tentacles to date, we are able to make statements about the causality of variation in tentacle number. The main conclusions of the present study are: (1) that plastic responses occur to all three environmental variables; (2) that these are part of a more generalized plastic response in the overall development of the zooids rather than being lophophore-specific; and (3) that the issue of whether the relevant developmental reaction norms are adaptive or not is an open (and interesting) question.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors