NDLI: The secondary vascular system of Actinopterygii: interspecific variation in origins and investment

Content Provider	Springer Nature Link
Author	Skov, Peter Vilhelm Bennett, Michael Brian
Copyright Year	2004
Abstract	Vascular casts of 3 species of Chondrichthyes, 1 of Dipnoi, 1 of Chondrostei and 14 species of the Teleostei were examined by light and scanning electron microscopy in order to give a qualitative and quantitative analysis of interarterial anastomoses (iaas) that indicate the presence (or absence) of a secondary vascular system (SVS). Anastomoses were found to originate from a variety of different primary blood vessels, many of which have not been previously identified as giving rise to secondary vessels. Segmental arteries derived from the dorsal aorta and supplying body musculature were major sites of origin of the SVS, although there was considerable variation in where, in the hierarchy of arterial branching, the anastomoses occurred. The degree of investment in a SVS was species specific, with more active species having a higher degree of secondary vascularisation. This difference was quantified using an absolute count of iaas between Anguilla reinhardtii and Trachinotus baillonii. A range of general features of the SVS is also described. No evidence of iaas was found on the coeliac, mesenteric or renal circulation in any species. Evidence of iaas was lacking in the dipnoan and chondrichthyan species examined, suggesting that a SVS is restricted to Actinopterygii. The presence and distribution of a SVS does not appear to be exclusively linked to phylogenetic position, but rather to the physiological adaptation of the species.
Starting Page	55
Ending Page	64
Page Count	10
File Format	PDF
ISSN	0720213X
Journal	Zoomorphology
Volume Number	123
Issue Number	1
e-ISSN	1432234X
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-11-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	vessels circulation Vascular casting Phylogeny Investment Chondrichthyes Chondrostei Holostei Teleostei
Content Type	Text
Resource Type	Article
Subject	Developmental Biology Animal Science and Zoology

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