Sperm competition leads to functional adaptations in avian testes to maximize sperm quantity and quality

Resolving variation in the reproductive tradeoff between sperm size and number

(2011) S. Immler et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Sperm competition games: Sperm size (mass) and number under raffle and displacement, and the evolution of P2

(2010) G.A. Parker et al.   JOURNAL OF THEORETICAL BIOLOGY

Sperm design and variation in the New World blackbirds (Icteridae)

(2009) Stefan Lüpold et al.   BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY

Sperm competition and sperm length influence the rate of mammalian spermatogenesis

(2009) S. A. Ramm et al.   Biology Letters

Female promiscuity promotes the evolution of faster sperm in cichlid fishes

(2009) J. L. Fitzpatrick et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Sperm morphology and sperm velocity in passerine birds

(2009) S. Lupold et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

INTRASPECIFIC VARIATION IN SPERM LENGTH IS NEGATIVELY RELATED TO SPERM COMPETITION IN PASSERINE BIRDS

(2008) Oddmund Kleven et al.   EVOLUTION

INCREASED POSTCOPULATORY SEXUAL SELECTION REDUCES THE INTRAMALE VARIATION IN SPERM DESIGN

(2008) Simone Immler et al.   EVOLUTION

SPERM COMPETITION SELECTS BEYOND RELATIVE TESTES SIZE IN BIRDS

(2008) Stefan Lüpold et al.   EVOLUTION