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Title :Larval development of the oriental lancelet, Branchiostoma belcheri, in laboratory mass culture
Authors :Urata, Makoto
Yamaguchi, Nobuo
Henmi, Yasuhisa
Issue Date :Aug-2007
Citation jtitle :Zoological Science
vol. :24
no. :8
start page :787
end page :797
Abstract :We are successfully maintaining a laboratory colony of the lancelet Branchiostoma belcheri bred in the laboratory. Based on living individuals in this mass culture, morphological characteristics from the seven-day larval to benthic juvenile stages have been studied. Most striking was that later larval development of B. belcheri showed great individual variation even in a rather stable culture environment. Metamorphosis first occurred on 60 days post fertilization (dpf) and was continuously observed throughout the present study up to 100 dpf. Morphological traits such as the number of primary gill slits and body size at the start of metamorphosis are apparently affected by culture condition. Body size measured in the largest individuals showed nearly linear growth at 0.087 mm/day. The variability found in larval development calls for caution when developmental stages and chronological ages are compared between populations. However, the developmental flexibility of this animal also raises the possibility that growth and sexual maturation could be controlled artificially in captivity.
URL :http://www.zoology.or.jp/
Type Local :雑誌掲載論文
Publisher :Zoological Society of Japan
Rights :Zoological Society of Japan / 社団法人日本動物学会
Comment :Zoological Science Award (論文賞) 2008年度受賞論文
URI :http://hdl.handle.net/2298/11343
Appears in Collections:Journal Article (Sciende)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2298/11343