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Nocturnal spawning as a way to avoid egg exposure to diurnal predators.

ABSTRACT: Animals that do not provide parental care have to secure the survival of their offspring by ensuring a safe reproductive environment or smart timing tactics. Nocturnal spawning behaviour of many fish species is an example of the latter behaviour in the animal kingdom and is hypothesized to provide a survival advantage to the eggs spawned during the night. In order to test the efficiency of the smart timing tactics in a freshwater fish, a study was carried out of the interaction of the rheophilic spawner (asp Leuciscus aspius) and the predator of its drifting eggs (bleak Alburnus alburnus) using passive telemetry. According to a model based on acquired data, asp laid 63% of its eggs at night, while vision-oriented bleak was present in 92% of the time during the day. This study gives support to the predator avoidance hypothesis, which expects animals to reproduce in a period when the probability of offspring predation is at its lowest.

SUBMITTER: Smejkal M

PROVIDER: S-EPMC6193928 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Nocturnal spawning as a way to avoid egg exposure to diurnal predators.

Šmejkal Marek M Souza Allan T AT Blabolil Petr P Bartoň Daniel D Sajdlová Zuzana Z Vejřík Lukáš L Kubečka Jan J

Scientific reports 20181018 1

Animals that do not provide parental care have to secure the survival of their offspring by ensuring a safe reproductive environment or smart timing tactics. Nocturnal spawning behaviour of many fish species is an example of the latter behaviour in the animal kingdom and is hypothesized to provide a survival advantage to the eggs spawned during the night. In order to test the efficiency of the smart timing tactics in a freshwater fish, a study was carried out of the interaction of the rheophilic ...[more]

PMID: 30337666

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