Publication Date:
2014-08-28
Description:
The origin of tetrapods from their fish antecedents, approximately 400 million years ago, was coupled with the origin of terrestrial locomotion and the evolution of supporting limbs. Polypterus is a member of the basal-most group of ray-finned fish (actinopterygians) and has many plesiomorphic morphologies that are comparable to elpistostegid fishes, which are stem tetrapods. Polypterus therefore serves as an extant analogue of stem tetrapods, allowing us to examine how developmental plasticity affects the 'terrestrialization' of fish. We measured the developmental plasticity of anatomical and biomechanical responses in Polypterus reared on land. Here we show the remarkable correspondence between the environmentally induced phenotypes of terrestrialized Polypterus and the ancient anatomical changes in stem tetrapods, and we provide insight into stem tetrapod behavioural evolution. Our results raise the possibility that environmentally induced developmental plasticity facilitated the origin of the terrestrial traits that led to tetrapods.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Standen, Emily M -- Du, Trina Y -- Larsson, Hans C E -- England -- Nature. 2014 Sep 4;513(7516):54-8. doi: 10.1038/nature13708. Epub 2014 Aug 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology Department, University of Ottawa, Gendron Hall, 30 Marie Curie Private, Ottawa, Ontario K1N 6N5, Canada. ; Redpath Museum, McGill University, 859 Sherbrooke Street West, Montreal, Quebec H3A 0C4, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25162530" target="_blank"〉PubMed〈/a〉
Keywords:
Animal Fins/anatomy & histology/physiology
;
Animals
;
*Biological Evolution
;
Biomechanical Phenomena
;
Bone and Bones/anatomy & histology/physiology
;
*Environment
;
Extremities/*anatomy & histology/*growth & development
;
Female
;
Fishes/*anatomy & histology/classification/*growth & development/physiology
;
*Locomotion
;
Male
;
Models, Animal
;
Muscles/anatomy & histology/physiology
;
Phylogeny
;
Swimming/physiology
;
Time Factors
;
Walking/physiology
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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