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Evolutionary Ecology of Marine Invertebrate Larvae$
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Tyler Carrier, Adam Reitzel, and Andreas Heyland

Print publication date: 2017

Print ISBN-13: 9780198786962

Published to Oxford Scholarship Online: January 2018

DOI: 10.1093/oso/9780198786962.001.0001

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Section 1 Summary—Evolutionary Origins and Transitions in Developmental Mode

Section 1 Summary—Evolutionary Origins and Transitions in Developmental Mode

Chapter:
(p.82) Chapter 6 Section 1 Summary—Evolutionary Origins and Transitions in Developmental Mode
Source:
Evolutionary Ecology of Marine Invertebrate Larvae
Author(s):
Tyler J. Carrier, Adam M. Reitzel, Andreas Heyland
Publisher:
Oxford University Press
DOI:10.1093/oso/9780198786962.003.0006

Abiotic variables and biotic interactions can act on variation in life history traits, ultimately leading to divergence in reproductive mode. Marine invertebrates have a remarkable diversity in such strategies, sometimes even between closely related species. It is this natural diversity that lends itself to employing a powerful comparative approach, both for particular morphological characteristics as well as molecular signatures from developmental genes. For example, complex life histories, where a larval stage is interposed between the embryo and juvenile, likely represent the product of numerous selection pressures, historical and current, that have shaped the diversity of larval stages in extant marine species. In fact, the very question about “what is a larva?” has to be addressed, as it is so intimately connected to bentho-planktonic life cycle and metamorphosis. Furthermore, novel larval types have evolved in particular lineages and larvae have been secondarily lost in others. This in itself creates an interesting and exciting playground to test evolutionary developmental hypotheses....

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