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Titolo:
Caudal differential pressure as a predictor of swimming speed of cod (Gadus morhua)
Autore:
Webber, DM; Boutilier, RG; Kerr, SR; Smale, MJ;
Indirizzi:
Dalhousie Univ, Dept Biol, Halifax, NS B3H 4J1, Canada Dalhousie Univ Halifax NS Canada B3H 4J1 iol, Halifax, NS B3H 4J1, Canada Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England Univ Cambridge Cambridge England CB2 3EJ ool, Cambridge CB2 3EJ, England Port Elizabeth Museum, ZA-6013 Humewood, South Africa Port Elizabeth Museum Humewood South Africa ZA-6013 mewood, South Africa
Titolo Testata:
JOURNAL OF EXPERIMENTAL BIOLOGY
fascicolo: 20, volume: 204, anno: 2001,
pagine: 3561 - 3570
SICI:
0022-0949(200110)204:20<3561:CDPAAP>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
METABOLIC-RATE; RAINBOW-TROUT; ENERGETICS; TELEMETRY; FREQUENCY; OUTPUT;
Keywords:
cod; Gadus morhua; pressure; swimming speed; tailbeat frequency; bioenergetics; oxygen consumption; fish;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Webber, DM Dalhousie Univ, Dept Biol, Halifax, NS B3H 4J1, Canada Dalhousie Univ Halifax NS Canada B3H 4J1 x, NS B3H 4J1, Canada
Citazione:
D.M. Webber et al., "Caudal differential pressure as a predictor of swimming speed of cod (Gadus morhua)", J EXP BIOL, 204(20), 2001, pp. 3561-3570

Abstract

We report the results of an experiment designed to investigate the feasibility of using differential pressure to estimate the swimming speed and metabolic rate of Atlantic cod (Gadus morhua). Seven cod were fitted with a miniature differential pressure sensor mounted on one side of the caudal peduncle immediately anterior to the base of the caudal fin rays. Relationships between differential pressure, tailbeat frequency, tailbeat amplitude, swimming speed and rate of oxygen consumption (M-O2) were determined as a function of the swimming speed of cod swimming at 5 degreesC in a recirculating 'Brett-style' respirometer. Tailbeat differential pressure, tailbeat amplitude and tailbeat frequency were highly correlated with swimming speed. The average or integrated pressure ranged from 0 to 150 Pa for speeds up to 0.8m s(-1) (1.1 L s(-1), where L is total body length), while the 'pressure difference' (maximum minus minimum pressure) ranged from 0 to 900 Pa. Small changes in swimming speed of less than 0.05 m s(-1) were readily detected as differences in tailbeat pressure. Burst swimming in the respirometer resulted in huge pressure 'bursts' of up to 5000 Pa 'pressure difference'. The rate of oxygen consumption increased exponentially and was highly correlated with swimming speed (r(2)=0.77). The rate of oxygen consumption was also correlated with tailbeat integrated pressure (r(2)=0.68) and with differential pressure (r(2)=0.43); regression correlations were always greater for individuals than for combined data from all cod. The results detailed in this study indicate that an ultrasonic differential pressure transmitter would enable accurate estimates of the swimming speed, rates of oxygen consumption and activity patterns of free-ranging fish in nature.

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Documento generato il 05/07/20 alle ore 09:54:23