Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 342180
Title Gonad development and spawning behaviour of artificially-matured European eel (Anguilla anguilla L.)
Author(s) Ginneken, V.J.T. van; Vianen, G.; Muusze, B.; Palstra, A.P.; Verschoor, L.; Lugten, O.; Onderwater, M.; Schie, Sj.; Niemantsverdriet, P.; Heeswijk, R. van; Eding, E.H.; Thillart, G. van den
Source Animal Biology 55 (2005)3. - ISSN 1570-7555 - p. 203 - 218.
DOI https://doi.org/10.1163/1570756054472791
Department(s) Aquaculture and Fisheries
IMARES
WIAS
Publication type Refereed Article in a scientific journal
Publication year 2005
Keyword(s) japanese eel - reproductive migration - hydrostatic-pressure - sexual-maturation - fertilization - induction - japonica - larvae - growth - eggs
Abstract Gonadal development and spawning behaviour of artificially-matured European eel (Anguilla anguilla L.) was studied. Treatment of males with Human Chorionic Gonadotropin (HCG; 1 IU g/week) resulted in a Gonado-Somatic Index (GSI) of 10.88 ± 3.39 and spermiation. Treatment of females with carp Pituitary suspension (cPs) (20 mg cPs/kg body weight per week) resulted in oogenesis with a GSI of 20.0 ± 11.3 (n = 7), and the number of eggs per female was 1874 * 103 ± 1116 * 103; (n = 7). Ovulation of the females was induced with 17, 20 dihydroxyprogesteron (DHP) at 2 g/g bodyweight. Eggs of European eel were found to be non-sticky and typically pelagic. Maximum speed of eggs rising to the surface in a water column was 2.24 ± 0.33 metres (m) per hour (h). To study behaviour in a qualitative way, two females were used together with three groups of three males. During a 283 minute (min) observation of the two females, we observed female-female interaction: 'lethargic behaviour' (33.6%) vs. 'cruising together' (66.4%). In the period when males and females were together (188 min), we observed 'approaching the head region of the female' (57.7%), 'touching the operculum' (39.4%), or 'approaching the urogenital area' (2.9%) by the males (total 725 seconds (s)). Sperm release in the presence of a female took 115 s of the total approaching time of 725 s (15.9%), while in the case of male-male interaction this was only 15 s of the total period of 116 s (12.9%). Induced spawning behaviour of eels was collective and simultaneous, corresponding to spawning in a group. This is the first time group spawning behaviour has ever been observed and recorded in eels
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