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Both-ways sex change in monogamous coral gobies, Gobiodon spp. by Yasuhiro Nakashima; Tetsuo Kuwamura; Yutaka Yogo is a Environmental Science article available to read on EtoBox.

What is Both-ways sex change in monogamous coral gobies, Gobiodon spp. about?

We confirmed both-ways sex change in the coral-dwelling gobies Gobiodon micropus, G. oculolineatus, G. quinquestrigatus and G. rivulatus rivulatus by mate-removal experiment in the field and by the aquarium experiment of keeping two consexual fish in a coral. Eight species of Gobiodon were found in Acropora corals on the reef flat of Sesoko Island, Okinawa, southern Japan. The 4 species mentioned above bred in monogamous pairs composed of a male and a female matched by size, and the male took care of eggs deposited on the coral branch. In G. quinquestrigatus and G. rivulatus rivulatus males were larger than females in newly formed pairs, and females grew faster than their mates until breeding. The growth-rate advantage in females seems to be the major factor in the evolution of female to male sex change. The gobies strongly depended on host corals, but they moved between the corals after mate loss or coral death to form new pairs. This provides opportunities for the evolution of male to female sex change: the ability to change sex in both directions reduces the frequency of risky movement between host corals to form new pairs. These conditions are very similar to those reported in

Who reads Both-ways sex change in monogamous coral gobies, Gobiodon spp.?

Author

Yasuhiro Nakashima; Tetsuo Kuwamura; Yutaka Yogo

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0378-1909)

Published

1996

Language

EN

Field

Environmental Science (Physical Sciences)