| Muscle activity and hydrodynamic function of pelvic fins in trout (Oncorhynchus mykiss). | |
| | |
MedLine Citation:
|
PMID: 20154199 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Contrary to the previous premise that pelvic fins lacked obvious function, recent work on three-dimensional fin motions suggests that pelvic fins actively control stability and speed in slowly swimming trout. This study used electromyography to measure pelvic fin muscle activity and particle imaging velocimetry to quantify flow along the ventral body region to test this hypothesis. Fish swam at slow speeds (0.13-1.36 BL s(-1)) while being filmed with three high speed cameras. Three-dimensional kinematics were captured for all trials. During EMG trials pelvic fin muscle activity was synchronized to kinematic motion, during particle imaging velocimetry trials, a laser light-sheet was used to visualize the flow surrounding the ventral aspect of the fish. Four main conclusions are reached: first, pelvic fins are actively oscillated during slow-speed swimming; antagonistic abductor and adductor muscles contracted simultaneously, their collective action producing a unique contralateral oscillating behaviour in the fins. Second, pelvic fins slow the flow along the ventral side affecting pitch and yaw instabilities; flow upstream of the pelvic fins is slowed by 0.02 m s(-1) and flow downstream of the pelvic fins is slowed by 0.034 m s(-1) compared with free stream flow. Third, pelvic fin wake influences anal fin angle of attack; flow angle in the wake of the pelvic fin was 33.84+/-2.4 deg. (max) and -11.83+/-11.2 deg. (min) compared with the free stream flow angle of 1.27+/-0.1 deg. Fourth, pelvic fins appear to actively damp body oscillation during slow-speed swimming, providing drag to help control speed and stabilize the body position during slow-speed swimming. |
| | |
Authors:
|
E M Standen |
Related Documents
:
|
17092209 - Fgf4 regulates blood and muscle specification in xenopus laevis. 9535149 - Insulin resistance in essential hypertension is characterized by impaired insulin stimu... 1911469 - Low frequency components of the body's center of gravity and blood circulation. 282069 - Effect of selective and non-selective beta-adrenoreceptor blockade on calf blood flow i... 9167019 - Effects of intermittent pneumatic compression on venous haemodynamics and fibrinolytic ... 910969 - Influence of the burn wound on peripheral circulation in thermally injured patients. 4033599 - Flow resistance of endotracheal tubes during kinking and compression. an experimental s... 12884989 - Nitrous oxide concentrations in maternal and fetal blood during caesarean section. 21216569 - Analysis of the contribution of sedimentation to bacterial mass transport in a parallel... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: The Journal of experimental biology Volume: 213 ISSN: 1477-9145 ISO Abbreviation: J. Exp. Biol. Publication Date: 2010 Mar |
Date Detail:
|
Created Date: 2010-02-15 Completed Date: 2010-05-03 Revised Date: 2010-05-19 |
Medline Journal Info:
|
Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
|
Languages: eng Pagination: 831-41 Citation Subset: IM |
Affiliation:
|
Museum of Comparative Zoology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animal Structures
/
anatomy & histology,
physiology* Animals Biomechanics / physiology Electric Stimulation Electrodes Electromyography Muscles / physiology* Oncorhynchus mykiss / physiology* Pelvis / physiology* Rheology Swimming / physiology Time Factors Water Movements |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: In situ cardiac function in Atlantic cod (Gadus morhua): effects of acute and chronic hypoxia.
Next Document: Perfusion with cAMP analogue affects pheromone-sensitive trichoid sensilla of the hawkmoth Manduca s...