caa a22 4500 477115608 CHVBK 20180405111621.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF00005004 doi (NATIONALLICENCE)springer-10.1007/BF00005004 Both-ways sex change in monogamous coral gobies, Gobiodon spp [Elektronische Daten] [Yasuhiro Nakashima, Tetsuo Kuwamura, Yutaka Yogo] Synopsis: 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 the both-ways sex change of another coral-dwelling goby Paragobiodon echinocephalus. Kluwer Academic Publishers, 1996 Hermaphroditism nationallicence Protandry nationallicence Protogyny nationallicence Growth-rate advantage nationallicence Inter-group movement nationallicence Monogamy nationallicence Parental care nationallicence Gobiidae nationallicence Nakashima Yasuhiro Department of Zoology, Faculty of Science, Kyoto University, 606-01, Kyoto, Japan aut Kuwamura Tetsuo Biological Laboratory, Faculty of Liberal Arts, Chukyo University, 466, Yagoto, Nagoya, Japan aut Yogo Yutaka Showa Women's High School, 877, Hita, Oita, Japan aut Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 281-288 0378-1909 46:3<281 1996 46 10641 https://doi.org/10.1007/BF00005004 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005004 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nakashima Yasuhiro Department of Zoology, Faculty of Science, Kyoto University, 606-01, Kyoto, Japan aut NATIONALLICENCE 700 1- Kuwamura Tetsuo Biological Laboratory, Faculty of Liberal Arts, Chukyo University, 466, Yagoto, Nagoya, Japan aut NATIONALLICENCE 700 1- Yogo Yutaka Showa Women's High School, 877, Hita, Oita, Japan aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 281-288 0378-1909 46:3<281 1996 46 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer