Journal article
Metamorphic changes in the intestine of three species of lampreys
Journal of Morphology, Vol.176(2), pp.181-196
1983
Abstract
Measurements have been made of those changes which lead to increases in the surface area of the intestine during the metamorphosis of three species of lampreys. Although the intestine of the Southern Hemisphere lamprey, Geotria australis, increases in length by 1.13 times and in diameter by 1.12 times, the main factor influencing the 5.71 times increase in surface area is the development of longitudinal folds. The contribution of the typhlosole to the internal perimeter of the intestine is less in most life cycle stages of G. australis than in Lampetra spp. The changes in the various intestinal measurements of the nonparasitic species L. planeri parallel those of the presumed ancestral parasitic species, L. fluviatilis, during the first six stages of metamorphosis. However, the longitudinal folds, but not the typhlosole, subsequently start regressing in L. planeri just after the time when the rate of gonadal development increases markedly. An account is also given of the pattern of fold formation and the development of the typhlosolar vein in G. australis.
Details
- Title
- Metamorphic changes in the intestine of three species of lampreys
- Authors/Creators
- R.W. Hilliard (Author/Creator)D.J. Bird (Author/Creator)I.C. Potter (Author/Creator)
- Publication Details
- Journal of Morphology, Vol.176(2), pp.181-196
- Publisher
- Wiley-Blackwell
- Identifiers
- 991005542413207891
- Copyright
- © 1983 Wiley-Liss, Inc.
- Murdoch Affiliation
- School of Environmental and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- 3.2 Marine Biology
- 3.2.62 Freshwater Fish Ecology
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