1 August 2007 Salinity Tolerance of Eggs of Buergeria japonica (Amphibia, Anura) Inhabiting Coastal Areas
Takashi Haramura
Author Affiliations +

Buergeria japonica is one of a few frogs that breed in coastal areas. To understand why this species can breed in coastal areas, I tested the salinity tolerance of eggs of B. japonica collected from a coastal area of Okinawa Island, Japan. All eggs hatched within four days after oviposition. At 0‰ salinity (control), over 94% of eggs hatched normally, and even at 1‰ salinity over 85% of eggs hatched. Survival rate of eggs was low at 2, 3, and 4‰, and no eggs hatched at 5‰ salinity. These results indicate that low salinity, close to pure water, is necessary for successful egg development, even for populations of B. japonica that breed in coastal areas. Future studies are necessary to examine whether females of B. japonica breeding in coastal areas select appropriate oviposition sites where the environmental salinity level is sufficiently low for eggs.

Takashi Haramura "Salinity Tolerance of Eggs of Buergeria japonica (Amphibia, Anura) Inhabiting Coastal Areas," Zoological Science 24(8), 820-823, (1 August 2007). https://doi.org/10.2108/zsj.24.820
Received: 23 January 2007; Accepted: 1 March 2007; Published: 1 August 2007
amphibian eggs
Buergeria japonica
coastal area
egg mortality
salinity tolerance
Get copyright permission
Back to Top