1. Akagawa I, Okiyama M (1993) Alternative male mating tactics in Hypoptychus dybowskii (Gasterosteiformes): territoriality, body size and nuptial colouration. Jpn J Ichthyol 40:343–350
2. Akagawa I, Tsukamoto Y, Okiyama M (1995) Sexual dimorphism and pair spawning into a sponge by the filefish, Brachaluteres ulvarum, with a description of the eggs and larvae. Jpn J Ichthyol 41:397–407
3. Akagawa I, Iwamoto T, Watanabe S, Okiyama M (2004) Reproductive behaviour of Japanese tubesnout, Aulichthys japonicus (Gasterosteiformes), in the natural habitat compared with relatives. Environ Biol Fishes 70:353–361
4. Balon EK (1975) Reproductive guilds of fishes: a proposal and definition. J Fish Res Board Can 32:821–864
5. Breder CM, Rosen DE (1966) Modes of reproduction in fishes. TFH Publications, New York