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Population energetics of the american white ibis


, : Population energetics of the american white ibis. Auk 94(1): 114-122

The white ibis [Eudocimus albus] population nesting in the fluctuating water ecosystem of S Florida [USA] numbered up to 62,000 birds and used several nesting habitats including islands in large lakes, the vast freshwater marshes of the Everglades and coastal estuaries. Periodic reproduction at large inland colonies, accounting for 93-98% of the nesting birds, sustains the population at its current level, but smaller, more consistantly successful coastal colonies provide recruitment during years of inland nesting failure. Clutch size, brood reduction pattern and energy requirements showed intraregional variation. Clutch size differences may be related to habitat, with lowered clutch sizes along the coast. Despite clutch size differences, the number of young fledged was similar in different colonies. Intraregional variation in timing of brood reduction resulted in differences in the energy required for nesting. The daily energy expenditure of white ibis was estimated from the time-activity budget and multiples of measured metabolic rates. Although existence metabolism was similar to that predicted by Kendeigh's (1970) regression, daily energy expenditure was considerably below that predicted by extrapolating King's (1974) regression, suggesting a slower increase of DEE [daily energy expenditure] at higher body weights. The white ibis consumed about 21% of its body weight daily, similar to that found in other studies of ciconiiformes. The energy required to raise a brood of young was 9.2-9.9 .times. 103 kcal. The nesting population expended 930 and 640 .times. 106 kcal during 1972 and 1973, respectively. Over 70% of this energy was derived from the Everglades and over 90% from inland habitats. Contrasted with the wood stork, the smaller size and shorter nesting cycle enables nesting white ibis to support 11 times the population on 1.1 times the energy. The ability of smaller birds to maintain higher populations on a given resource base may supply a competitive advantage during times of intense resource-based selection. Together the south Florida populations of white ibis and wood storks require 1.9 billion kcal/nesting season and are important determinants of energy flow in the wetland ecosystem.

US$19.90

DOI: 10.2307/4084896


Other references

Pryor, W.W.; Blackhurst, D.W.; Gates, K.; Wagner, G.S., 1995: Evaluation of computerized electrocardiographic interpretations in a community hospital. Journal of the South Carolina Medical Association 91(3): 105-111

Claus, E.; Lemahieu, S.F.; Ernould, D., 1980: The most used otoradiological projections. Journal Belge de Radiologie 63(2-3): 183-203

Kawashima Y.; Hino T.; Takeuchi H.; Niwa T.; Horibe K., 1991: Shear induced phase inversion and size control of water oil water emulsion droplets with porous membrane. A water/oil/water (w/o/w) emulsion was prepared with liquid paraffin, hydrophobic (Span 80) and hydrophilic (Tween 20) surfactants. When the emulsion was extruded through a polycarbonate membrane possessing pores of 3 or 8 .mu.m in diameter, the e...

Gálvez, J.; López-Domínguez, J.M.; Navarro, A.; Creagh, R.; Casado, J.L.; Chinchón Lara, I., 1998: Patient with Hansen disease and lepromatous reaction with predominant neural involvement. We describe a patient with a diagnosis of Hansen's disease borderline type, presenting as cutaneous lesions and silent multineuritis. Samples of nasal mucus, earlobe and cutaneous lesions were positive for acid-fast bacilli. He was given trea...

Laidler, K.J., 1983: Kinetic equations and mechanisms for activation and inhibition in enzyme systems. The rates of enzyme reactions that are activated or inhibited by added modifiers can in some cases be expressed as a rational function of the first degree, v = (alpha 0 + alpha 1[Q] )/(beta 0 + beta 1 [Q] ) where [Q] is the concentration of the mo...

Wu, J.; Baguley, I.J., 2005: Urinary retention in a general rehabilitation unit: prevalence, clinical outcome, and the role of screening. To document the prevalence of, risk factors for, and outcomes of, urinary retention (UR). Prospective observational study. A subacute general (predominantly geriatric) rehabilitation unit. Three hundred nineteen consecutive patients (196 women, 12...

Marques-Vidal, P.; Cambou, J.P.; Ferrières, J.; Thomas, D.; Grenier, O.; Cantet, C.; Danchin, N., 2001: Distribution and treatment of cardiovascular risk factors in coronary patients: the Prevenir Study. The aim of this study was to evaluate the distribution and hospital treatment of cardiovascular risk factors in coronary patients. A transverse observational study was carried out in 77 cardiological centres throughout France. All patients with a...

Meisner, Herman Matthew, 1964: Influence of tonicity on mitotic recovery in X-irradiated grasshopper neuroblasts. Diss Abstr 25(4): 2182-2183

Ricketti, P.A.; Ricketti, A.J.; Cleri, D.J.; Seelagy, M.; Unkle, D.W.; Vernaleo, J.R., 2011: A 41-year-old male with cough, wheeze, and dyspnea poorly responsive to asthma therapy. Reactive airway disease is often triggered by an upper respiratory viral infection and readily responds to anti-inflammatory and bronchodilator therapy. The differential diagnosis for unresponsive disease includes poorly controlled asthma, noncomp...

Shephard B.K.; Mcintosh A.W.; Atchison G.J.; Nelson D.W., 1980: Aspects of the aquatic chemistry of cadmium and zinc in a heavy metal contaminated lake. Concentrations of Cd and Zn were determined at several sites in Palestine Lake, Indiana, USA, and in the stream (Williamson Ditch) which transports metal-bearing wastes to the lake. Average dissolved Cd and Zn concentrations in the lake were as hi...