Branchial vascular pathways in two species of Tetraodontiformes and the concept of secondary vessels and nutrient arteries

Skov, P. V. and Bennett, M. B. (2005) Branchial vascular pathways in two species of Tetraodontiformes and the concept of secondary vessels and nutrient arteries. Zoomorphology, 124 2: 79-88.


Author Skov, P. V.
Bennett, M. B.
Title Branchial vascular pathways in two species of Tetraodontiformes and the concept of secondary vessels and nutrient arteries
Journal name Zoomorphology   Check publisher's open access policy
ISSN 0720-213X
Publication date 2005
Sub-type Article (original research)
DOI 10.1007/s00435-005-0113-3
Volume 124
Issue 2
Start page 79
End page 88
Total pages 10
Editor T. Bartolomaeus
Place of publication New York
Publisher Springer
Collection year 2005
Language eng
Subject C1
270503 Animal Anatomy and Histology
780105 Biological sciences
Abstract The vascular organisation of the branchial basket was examined in two Tetraodontiform fishes; the three-barred porcupinefish, Dicotylichthys punctulatus and the banded toadfish, Marylina pleurosticta by scanning electron microscopy of vascular casts and standard histological approaches. In D. punctulatus, interarterial anastomoses (iaas) originated at high densities from the efferent filamental and branchial arteries, subsequently re-anastomosing to form progressively larger secondary vessels. Small branches of this system entered the filament body, where it was interspersed between the intrafilamental vessels. Large-bore secondary vessels ran parallel with the efferent branchial arteries, and were found to constitute an additional arterio-arterial pathway, in that these vessels exited the branchial basket in company with the mandibular, the carotid and the afferent and efferent branchial arteries, from where they gave rise to capillary beds after exit. Secondary vessels were not found to supply filament muscle; rather these tissues were supplied by single specialised vessels running in parallel between the efferent and afferent branchial arteries in both species examined. Although the branchial vascular anatomy was generally fairly similar for the two species examined, iaas were not found to originate from any branchial component in the banded toadfish, M. pleurosticta, which instead showed a moderate frequency of iaas on other vessels in the cephalic region. It is proposed that four independent vascular pathways may be present within the teleostean gill filament, the conventional arterio-arterial pathway across the respiratory lamellae; an arterio-arterial system of secondary vessels supplying the filament and non-branchial tissues; a system of vessels supplying the filament musculature; and the intrafilamental vessels (central venous sinus). The present study demonstrates that phylogenetic differences in the arrangement of the branchial vascular system occur between species of the same taxon.
Keyword Secondary
Vessels
Arterio-venous
Inter-arterial
Anastomoses
Intrafilamental
Non-respiratory
Anatomy & Morphology
Zoology
Accessory Respiratory Organs
Salmo-gairdneri Richardson
Rainbow-trout
Blood-flow
Oncorhynchus-mykiss
Gill Filament
Fish Gill
Microcirculation
Circulation
Serotonin
Q-Index Code C1

 
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