ABSTRACT
Fishes vary in where they reproduce, some, such as the annual killifishes of the tropics, being confined to a single small pool their entire lifetimes, others undertaking lengthy migrations between feeding and breeding sites. Some fishes lay eggs, others produce living young, and even their manner of determining which sex an individual belongs to shows greater variation than is found in any other group of vertebrates. Numerous reviews of fish reproductive physiology and development exist, perhaps the best still being W. S. Hoar’s (1969) paper. More recent reviews (Carrier et al., 2004; Yaron and Sivan, 2006) include increased coverage of endocrines and other molecular aspects of reproduction. Other worthwhile resources include Nikolsky (1963), Potts and Wooton (1984), Blaxter (1969, 1988) and Hamlett (2005).
