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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: High temperature is detrimental to captive lumpfish (Cyclopterus lumpus, L) reproductive performance
Author(s): Pountney, Samuel M
Lein, Ingrid
Migaud, Herve
Davie, Andrew
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Keywords: Lumpfish
Cleaner fish
Gamete quality
Issue Date: 30-May-2020
Citation: Pountney SM, Lein I, Migaud H & Davie A (2020) High temperature is detrimental to captive lumpfish (Cyclopterus lumpus, L) reproductive performance. Aquaculture, 522, Art. No.: 735121.
Abstract: There is increased commercial interest in the production of Lumpfish (Cyclopterus lumpus, Linnaeus, 1758) as a biological control for sea lice infections in Atlantic salmon farming. To ensure sustainability, reliable captive breeding is required however, optimal husbandry conditions for broodstock performance remain unknown. The present study investigated the effects of holding temperature on spawning productivity and gamete quality in captivity reared lumpfish. Sexually mature lumpfish (15 month old) were held on three temperature regimes (6 °C, 9 °C and 14 °C) from the onset of first spawning. Holding mature lumpfish at high temperatures (14 °C) resulted in a notable reduction in spawning activity with a significant reduction in sperm density (50% reduction compared to pre-treatment levels) and furthermore resulted in the production of non-viable oocytes (0% to eyeing rate). Holding lumpfish at 9 °C and 6 °C did not have a similar negative impact on gamete quality, however the spawning season for the 6 °C treatment was twice as long as the 9 °C treatment. These results indicate that holding temperature for lumpfish broodstock should not reach the 14 °C degree threshold, with a possible thermal optimum below 10 °C. The current findings are the first step in identifying optimal rearing conditions for captive Lumpfish broodstock.
DOI Link: 10.1016/j.aquaculture.2020.735121
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. Please cite this article as: S.M. Pountney, I. Lein, H. Migaud, et al., High temperature is detrimental to captive lumpfish (Cyclopterus lumpus, L) reproductive performance, aquaculture (2020), 522, Art No.: 735121. © 2020 Published by Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
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