Data file

Data collected in the field, see readme file for details

MOESM2 of Sperm collection in Black-legged Kittiwakes and characterization of sperm velocity and morphology

Additional file 2. Video of spermatozoa in motion

MOESM1 of Sperm collection in Black-legged Kittiwakes and characterization of sperm velocity and morphology

Additional file 1. Video showing sperm collection on a Black-legged Kittiwake

MOESM3 of Sperm collection in Black-legged Kittiwakes and characterization of sperm velocity and morphology

Additional file 3. We checked the minimum number of sperm cells per ejaculate required for accurate estimates of ejaculate mean and standard deviation using a resampling procedure. We randomly sampled 1 to 15 sperm cells per ejaculate without replacement and computed the associated mean (Fig. S1) and standard deviation (Fig. S2). A visual assessment of the plots reveals that a minimum of 10 sperm cells per ejaculate allows accurate estimates of mean and SD