Cooperatively breeding cichlid fish adjust their testis size but not sperm traits in relation to sperm competition risk
Satoshi Awata, Tomohiro Takeyama, Yoshimi Makino, Yuko Kitamura and Masanori Kohda
Behavioural Ecology and Sociobiology
62
1701
1710
https://doi.org/10.1007/s00265-008-0598-0