Transfer of symbiotic luminous bacteria from parental Leiognathus nuchalis to their offspring |
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| Authors: | M Wada N Azuma N Mizuno H Kurokura |
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| Institution: | (1) Ocean Research Institute, The University of Tokyo, Minamidai 1-15-1, Nakano-ku, Tokyo 164-8639, Japan, JP;(2) Laboratory of Wildlife Management, Faculty of Agriculture and Life Science, Hirosaki University, Bunkyo-cho, Hirosaki 036-8224, Japan, JP;(3) Fisheries Laboratory, Faculty of Agriculture, The University of Tokyo, Maisaka 2971-4, Maisaka-cho, Hamana-gun, Shizuoka 431-0211, Japan, JP;(4) Laboratory of Global Fisheries Science, Department of Global Agricultural Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan, JP |
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| Abstract: | Juveniles of Leiognathus nuchalis were raised from fertilized eggs for up to 60 d and examined for luminescence activity. Almost all juveniles raised separately
from adults failed to produce detectable light. In contrast, a significant percentage (33 to 100%) of the juveniles became
luminescent in less than 48 h when they were either kept with adults or inoculated with a homogenate of the adult light organs.
The luminescence tended to increase with time after the treatments. These findings suggest that: (1) most of L. nuchalis offspring typically hatch and develop apo-symbiotically and (2) at least 45 d after hatching, juveniles can be infected with
symbiotic luminous bacteria from the light organ of adult fish, and thereby gain the ability to produce light.
Received: 16 February 1999 / Accepted: 21 September 1999 |
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