Syngnathoides biaculeatus (the Double-ended Pipefish) belongs to the family Syngnathidae, which is characterised by exclusive male parental care of offspring. Males incubate eggs which females deposit onto his stomach. In this study I compared the number of eggs in male and female Double-ended Pipefish to try to determine if females distribute eggs to more than one male. Forty-eight fish were collected from Moreton Bay. Clutch size was recorded for females and brood size was recorded on pregnant males. Clutch sizes of males and females did not differ significantly: the median number of eggs in the most mature batch of eggs in females was 156, and in males was 162. These results suggest that the female probably gives her clutch to only one male.
Kelly Perry, ’01 North Mankato, MN
Sponsor: Martha Condon