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Evolution in an extreme environment: developmental biases and phenotypic integration in the adaptive radiation of antarctic notothenioids
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2016
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Source: BMC Evolutionary Biology, 16(1)
[PDF-2.15 MB]
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Journal Title:BMC Evolutionary Biology
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Description:Over the past 40 million years water temperatures have dramatically dropped in the Southern Ocean, which has led to the local extinction of most nearshore fish lineages. The evolution of antifreeze glycoproteins in notothenioids, however, enabled these ancestrally benthic fishes to survive and adapt as temperatures reached the freezing point of seawater (−1.86 °C). Antarctic notothenioids now represent the primary teleost lineage in the Southern Ocean and are of fundamental importance to the local ecosystem. The radiation of notothenioids has been fostered by the evolution of “secondary pelagicism”, the invasion of pelagic habitats, as the group diversified to fill newly available foraging niches in the water column. While elaborate craniofacial modifications have accompanied this adaptive radiation, little is known about how these morphological changes have contributed to the evolutionary success of notothenioids.
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Source:BMC Evolutionary Biology, 16(1)
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ISSN:1471-2148
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Rights Information:CC BY
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Compliance:Library
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