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キヌバリの産卵行動


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Title: キヌバリの産卵行動
Other Titles: The Reproductive Behaviour in the Gobiid Fish, Pterogobius elapoides (GÜNTHER)
Authors: 道津, 喜衛 / 堤, 俊夫
Authors (alternative): Dotu, Yosie / Tsutsumi, Toshio
Issue Date: 30-Nov-1959
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.8, pp.186-190; 1959
Abstract: Pterogobius elapoides (GÜNTHER) is a small Gobiid fish, some 80mm in total length, with a polymorphic black band at the base of caudal fin (Plate XVI, Figs. 1, 2, 3, 4). It is distributed in Japan throughout, and lives individually a semi-pelagic life in bottom waters of rocky shore. It feeds on copepods, organic deposit and sea-weeds omnivorosly. A pair of this Gobiid fish, reared in the Shimonoseki Aquarium, spawnd four times during from October 6 th to November 30 th, 1957 (Plate XVI, Fig. 6; Table 1). The authors observed the spawning behaviour and detected three phases of it as followings: (1) Pre-spawning behaviour, (2) Spawning behaviour, and (3) Post-spawning behaviour (Plate XVI, Figs, 1, 2, 3). (1) Pre-spawning behaviour. The ripe male, 98mm in total length, with black nuptial colour-ation enters into the shell set for artifical breeding-room and takes out a territory in its vicinity. Then the male leads the ripe female, 107mm in total lenght, with black nuptial colouration into the shell. A pair of the fish nest in the shell during from one day to two days period preceding spawning. This nesting-behaviour is a important phase of the spawning. (2) Spawning behaviour. After the nesting, the oviposition and fertilization take place alternately. The duration of every oviposition and fertilization is about thirty seconds. This behaviour-phase lasts as long as about one hour. (3) Post-spawning behaviour. The female parent leaves the nest soon after spawning, while the male guards over the egg-mass in the nest. The number of the eggs of every spawning was enumerated as about 1,800. The fertilized egg is ellipsoid, 2.2~2.4mm in long axis and 0.7~0.9mm in short axis, with a large perivitelline space and whity yolk (Fig. 1).
URI: http://hdl.handle.net/10069/31845
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第8号

Citable URI : http://hdl.handle.net/10069/31845

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