Summary
Manipulations of population density, availability of oviposition substrate, and size of breeding habitat affected the proportion of pupfish (Cyprinodon pecosensis) males adopting territorial and satellite breeding tactics. Satellites occupied stations above breeding substrates defended by territorial males. Both territorial and satellite males developed a bright blue breeding coloration. A third breeding tactic, sneak-spawning, was occasionally observed. Sneak-spawning males retained the cryptic female coloration and occasionally spawned on territories. The lower reproductive success of satellites and sneak-spawning males suggested that both are conditional breeding tactics adopted by competitively inferior males. Satellites were present in all treatments that favored a territorial breeding system, but were absent when the breeding system was a dominance hierarchy. Satellites were associated with territorial males that had higher reproductive success and larger territories than males without satellites. Satellites functioned as parasites rather than as mutualists, since they disrupted spawnings and stole copulations from territorial males. The occurrence and frequency of the conditional breeding behaviours in pupfish represent facultative responses of males to changes in the intensity of competition for breeding sites and females.
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Kodric-Brown, A. Satellites and sneakers: opportunistic male breeding tactics in pupfish (Cyprinodon pecosensis). Behav Ecol Sociobiol 19, 425–432 (1986). https://doi.org/10.1007/BF00300545
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DOI: https://doi.org/10.1007/BF00300545