Diel metabolic and activity patterns of the lemon shark (Negaprion brevirostris)

✍ Scribed by Nixon, Asa J. ;Gruber, Samuel H.

• Publisher: John Wiley and Sons
• Year: 1988
• Tongue: English
• Weight: 590 KB
• Volume: 248
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402480102

✦ Synopsis

Computation of the energy budget, average daily metabolic rate, and standard metabolism require information on hourly metabolic rates over a full 24-hour period. This study provides such information for the lemon shark, a tropical predator. Simultaneous measurements of metabolism and activity in an annular respirometer demonstrated that oxygen consumption increased from a daytime level of 176 to 210 mg02 kgplhpl at night. Activity increased concurrently from 0.17 to 0.33 bl spl. The average daily metabolic rate was 16.2 k cal kg-l at 0.26 bl spl and 23 "C. Both activity and metabolic rate appear to have endogenous circadian components.