@misc{Diehl_Barbara_Productivity_1971,
 author={Diehl, Barbara},
 editor={Polish Academy of Sciences, Institute of Ecology},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 howpublished={online},
 year={1971},
 language={eng},
 abstract={Daily food consumption of the Red-backed Shrike averaged 56% of the mean body weight for nestlings and 50% for fledglings Gross energy intake was 15.9 kcall/ nestling/ day, and 22.8 kcal/ fledgling/ day. Average daily metabolic rate was 8.4 kcal/nestling/day and 14.9 kcal/ fledgling/day. Food consumption and metabolic rate were largely affected by the ambient temperature. Amount of food consumed by young birds until a month of age in the Red-backed Shrike population was 3.5 mg fresh weight of insects per day per m2.},
 type={Text},
 title={Productivity investigation of two types of meadows in the Vistula valley. 12, Energy requirement in nestling and fledgling Red-backed Shrike (Lanius collurio L.)},
 URL={http://rcin.org.pl/Content/71712/PDF/WA058_86465_P2840-T19_Eko-Pol-A-Nr-18.pdf},
 volume={19},
 number={18},
 journal={Ekologia Polska},
 publisher={Państwowe Wydawnictwo Naukowe},
 keywords={meadows, soils, research, Poland, primary productivity, ecology, red-backed shrike, Lanius collurio},
}