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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Seasonal changes in broodstock spawning performance and egg quality in ballan wrasse (Labrus bergylta)
Author(s): Grant, Bridie
Davie, Andrew
Taggart, John
Selly, Sarah-Louise Counter
Picchi, Nicolas
Bradley, Caroline
Prodohl, Paulo A
Leclercq, Eric
Migaud, Herve
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Keywords: Cleaner fish
Ballan wrasse
Broodstock management
Parental contribution, spawning patterns, fatty acid
Issue Date: 1-Nov-2016
Date Deposited: 22-Aug-2016
Citation: Grant B, Davie A, Taggart J, Selly SC, Picchi N, Bradley C, Prodohl PA, Leclercq E & Migaud H (2016) Seasonal changes in broodstock spawning performance and egg quality in ballan wrasse (Labrus bergylta). Aquaculture, 464, pp. 505-514.
Abstract: Sea lice continue to be one of the largest issues for the salmon farming industry and the use of ballan wrasse (Labrus bergylta) as a biological control is considered to be one of the most sustainable solutions in development. Broodstock management has proved challenging in the initial phases due to the significant lack of understanding of basic reproductive physiology and behaviour in the species. The aim of the study was to monitor captive breeding populations throughout a spawning season to examine timing and duration of spawning, quantify egg production, and look at seasonal changes in egg quality parameters as well as investigate the parental contribution to spawning events. A clear spawning rhythm was shown with 3–5 spawning periods inclusive of spawning windows lasting 1–9days followed by interspawning intervals of 8–12days. Fertilization rate remained consistently high (>87.5%) over the spawning season and did not differ significantly between spawning populations. Hatch rate was variable (0–97.5%), but peaked in the middle of the spawning season. Mean oocyte diameter and gum layer thickness decreased slightly over the spawning season with no significant differences between spawning populations. Fatty acid (FA) profile of eggs remained consistent throughout the season and with the exception of high levels of ARA (3.8±0.5% of total FA) the FA profile was similar to that observed in other marine fish species. Parental contribution analysis showed 3 out of 6 spawning events to be single paired mating while the remaining 3 had contributions from multiple parents. Furthermore, the proposed multiple batch spawning nature of this species was confirmed with proof of a single female contributing to two separate spawning events. Overall this work represents the first comprehensive dataset of spawning activity of captive ballan wrasse, and as such and will be helpful in formulating sustainable broodstock management plans for the species.
DOI Link: 10.1016/j.aquaculture.2016.07.027
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Accepted refereed manuscript of: Grant B, Davie A, Taggart J, Picchi N, Bradley C, Prodohl PA, Leclercq E & Migaud H (2016) Seasonal changes in broodstock spawning performance and egg quality in ballan wrasse (Labrus bergylta), Aquaculture, 464, pp. 505-514. DOI: 10.1016/j.aquaculture.2016.07.027 © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
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