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/lp/springer-journals/the-role-of-dilution-and-differential-predation-in-brood-adoptions-of-FMwP730w4s
- Publisher
- Springer Journals
- Copyright
- Copyright © 2004 by Springer-Verlag and ISPA
- Subject
- LifeSciences
- ISSN
- 0873-9749
- eISSN
- 1437-9546
- DOI
- 10.1007/s10211-004-0098-9
- Publisher site
- See Article on Publisher Site
Abstract
Laboratory experiments were conducted to determine if the addition of conspecific “foreign” fry affects the survival of “host” fry in the Midas cichlid, Amphilophus xiloaensis. The study consisted of two separate experiments: (1) adoption treatments simulated by adding 75 foreign fry to a host brood containing 150 fry and parents (10 trials where host fry were larger, 10 trials where foreign fry were larger); (2) control treatments in which no foreign fry were added to a host brood containing 150 fry and parents (20 trials). Predation was imposed by introducing three bigmouth sleepers (Gobiomorus dormitor). No significant differences were found between the survival of host, foreign, and control fry after 24 h. Survival was significantly affected by fry size, leading to differential predation on smaller fry. Mean predation rate increased proportionally with brood size, therefore the addition of conspecific foreign fry did not result in dilution of the host brood.
Journal
acta ethologica – Springer Journals
Published: Oct 16, 2004