Reproductive Energetics and Prey Harvest of Leach's Storm‐Petrels in the Northwest Atlantic

Abstract

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Leach's Storm-Petrels (Oceanodroma leucorhoa), the smallest and most abundant seabirds that breed in the northwest Atlantic, are not usually included in avian energetics models. To round out an energy analysis of seabirds spanning the full range of body sizes in the northwest Atlantic, the field metabolic rates (FMRs) of breeding Leach's Storm-Petrels were measured using doubly labeled water techniques (DLW). Metabolic, dietary and, demographic data were used as inputs in a populations energetics model to estimate the energy requirements and prey harvests of the Leach's Storm-Petrel population of eastern North America. Ecological Society of AmericaFMRs An intra-specific, inter-colony difference in FMR is suggested: FMRs measured in a Newfoundland colony were significantly higher than those determined with the same DLW procedure in the Bay of Fundy near the southern limit of the species' breeding range in the northwest Atlantic. Differences in ambient temperatures and wind speed associated with different oceanographic regimes may generate energetic differences. Like inter-colony differences in feeding ecology, inter-colony differences in FMR need to be considered in population and community energetics models and in meso-and mega-scale extrapolations.

Energy costs of chick rearing in Black-legged Kittiwakes (Rissa tridactyla)

“…Studies of Leach's Storm Petrels (Oceanodroma leucorhoa; Montevecchi et al 1992) and Least Auklets (Obst et al 1995) provide exceptions. Montevecchi et al (1992) compared the results of their study of storm petrels breeding at Green Island, Newfoundland (46°53′N), with a study of the same species breeding in the Bay of Fundy (44°35′N) (Ricklefs et al 1986), and detected an intercolony difference in FMR. This difference, however, was not attributed to different adult reproductive investment strategies in the two study populations.…”

Exploitation of trawler discards by breeding seabirds in the north-western Mediterranean: differences between the Ebro Delta and the Balearic Islands areas

“…Since there are no measures of basal metabolic rate (BMR) consumption for Mediterranean seabirds, we used data from Scottish seabirds recorded by Bryant and Furness (1995): BMR (kJ d 1 )=2.3 (body mass) 0.774 . Energy requirements of Mediterranean seabirds are probably lower because of the lower latitude and higher average temperatures (Birt-Friesen et al, 1989;Montevecchi et al, 1992).…”

Application of the two-sample doubly labelled water method alters behaviour and affects estimates of energy expenditure in black-legged kittiwakes

“…Similarly, in most field studies, as has been pointed out earlier (Speakman, 1997;Uttley et al, 1994), altered behaviour of study animals is routinely not controlled for (e.g. Montevecchi et al, 1992;Weathers et al, 2002). Also, many studies that do assess potential behavioural impacts suffer from small sample sizes and consequently from low statistical power to detect effects (e.g.…”