Why are there no really big bony fishes? A point-of-view on maximum body size in teleosts and elasmobranchs

Why are there no really big bony fishes? A point-of-view on maximum body size in teleosts and... The most massive teleost, the ocean sunfish(Mola mola), is an order of magnitude smaller than the largest cartilaginous fish,the whale shark (Rhincodon typus), and issignificantly smaller than several other extantelasmobranch species. Possible reasons for this discrepancy in maximum size include:anatomical, physiological, ecological, and life-history/ontogenetic constraints. Weexamined life-history traits and growth ratesas the most likely constraints on maximum teleostsize. For pelagic fishes there appear to be two life-history strategies: producing few,large, live young or many, tiny eggs. We propose that this dichotomy is an evolutionaryvestige of the freshwater origins of teleosts, and is the basis of the limitation onmaximal body size in teleosts. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reviews in Fish Biology and Fisheries Springer Journals

Why are there no really big bony fishes? A point-of-view on maximum body size in teleosts and elasmobranchs

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Publisher
Springer Journals
Copyright
Copyright © 2002 by Kluwer Academic Publishers
Subject
Life Sciences; Freshwater & Marine Ecology; Zoology
ISSN
0960-3166
eISSN
1573-5184
D.O.I.
10.1023/A:1025365210414
Publisher site
See Article on Publisher Site

Abstract

The most massive teleost, the ocean sunfish(Mola mola), is an order of magnitude smaller than the largest cartilaginous fish,the whale shark (Rhincodon typus), and issignificantly smaller than several other extantelasmobranch species. Possible reasons for this discrepancy in maximum size include:anatomical, physiological, ecological, and life-history/ontogenetic constraints. Weexamined life-history traits and growth ratesas the most likely constraints on maximum teleostsize. For pelagic fishes there appear to be two life-history strategies: producing few,large, live young or many, tiny eggs. We propose that this dichotomy is an evolutionaryvestige of the freshwater origins of teleosts, and is the basis of the limitation onmaximal body size in teleosts.

Journal

Reviews in Fish Biology and FisheriesSpringer Journals

Published: Oct 13, 2004

References

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