Freshwater entry behaviour of a non‐migratory stenohaline marine fish Takifugu snyderi

We conducted salinity choice trials with the stenohaline marine species Takifugu snyderi to test their freshwater (FW) entry frequency in relation to starvation. The fish preferred to enter non‐natal FW rather than remain in seawater. No relationship was detected between starvation and FW entry beha...

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Bibliographic Details
Published in:Journal of fish biology 2020-02, Vol.96 (2), p.480-485
Main Authors: Nakamura, Masahiro, Masuda, Reiji, Tsukamoto, Katsumi, Otake, Tsuguo
Format: Article
Language:English
Subjects:
Animals
Behavior, Animal
behaviour
Choice Behavior
diadromy
evolutionary origin
Fish
Fish migration
Food Deprivation
Fresh Water
Freshwater
Inland water environment
Marine fish
Marine fishes
osmoregulation
partial migration
Regular Paper
Regular Papers
Salinity
Seawater
Starvation
Stenohalinity
Takifugu - physiology
Takifugu snyderi
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Summary:We conducted salinity choice trials with the stenohaline marine species Takifugu snyderi to test their freshwater (FW) entry frequency in relation to starvation. The fish preferred to enter non‐natal FW rather than remain in seawater. No relationship was detected between starvation and FW entry behaviour. Our results provide new empirical evidence of a stenohaline fish entering a non‐natal osmotic environment. Further research on the entry of stenohaline species such as this one into lethal environments may help determine if this might help promote the evolution of diadromous life histories.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.14229