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Volume 266(1437);  December 22, 1999
Knowing no fear.
R Sprengelmeyer, A W Young, U Schroeder, P G Grossenbacher, J Federlein, T Büttner, and H Przuntek
Proc Biol Sci. 1999 December 22; 266(1437): 2451–2456.
PMCID: PMC1690477
Anti-predator behaviour changes following an aggressive encounter in the lizard Tropidurus hispidus
R Diaz-Uriarte
Proc Biol Sci. 1999 December 22; 266(1437): 2457–2464.
PMCID: PMC1690482
Regulation of queen-worker conflict in bumble-bee (Bombus terrestris) colonies
G Bloch
Proc Biol Sci. 1999 December 22; 266(1437): 2465–2469.
PMCID: PMC1690486
An uncoupling of male and sexual egg production leads to reduced inbreeding in the cyclical parthenogen Daphnia
De Meester L and J Vanoverbeke
Proc Biol Sci. 1999 December 22; 266(1437): 2471–2477.
PMCID: PMC1690476
Sex differences in energy expenditure in non-human primates.
C Key and C Ross
Proc Biol Sci. 1999 December 22; 266(1437): 2479–2485.
PMCID: PMC1690481
Climate change has affected the breeding date of tree swallows throughout North America
P0 Dunn and DW Winkler
Proc Biol Sci. 1999 December 22; 266(1437): 2487–2490.
PMCID: PMC1690485
Joint effects of feeding and breeding behaviour on trophic dimorphism in hummingbirds
R Bleiweiss
Proc Biol Sci. 1999 December 22; 266(1437): 2491–2497.
PMCID: PMC1690480
Bird orientation at high latitudes: flight routes between Siberia and North America across the Arctic Ocean
T Alerstam and GA Gudmundsson
Proc Biol Sci. 1999 December 22; 266(1437): 2499–2505.
PMCID: PMC1690484
Evolution of stepping-stone dispersal rates.
S Gandon and F Roussett
Proc Biol Sci. 1999 December 22; 266(1437): 2507–2513.
PMCID: PMC1690488
The immunocompetence handicap hypothesis: testing the genetic predictions
J Kurtz and KP Sauer
Proc Biol Sci. 1999 December 22; 266(1437): 2515–2522.
PMCID: PMC1690479
Virus phenotype switching and disease progression in HIV-1 infection.
D S Callaway, R M Ribeiro, and M A Nowak
Proc Biol Sci. 1999 December 22; 266(1437): 2523–2530.
PMCID: PMC1690483
Scrapie transmission in Britain: a recipe for a mathematical model.
A R Mclean, A Hoek, L J Hoinville, and M B Gravenor
Proc Biol Sci. 1999 December 22; 266(1437): 2531–2538.
PMCID: PMC1690487
Invasion thresholds for fungicide resistance: deterministic and stochastic analyses
S Gubbins and CA Gilligan
Proc Biol Sci. 1999 December 22; 266(1437): 2539–2549.
PMCID: PMC1690478
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