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Brood-stock management and early hatchery rearing of Arctic charr (Salvelinus alpinus(Linnaeus))

Olk, Tom Robin and Jeuthe, Henrik and Thorarensen, Helgi and Wollebaek, Jens and Lydersen, Espen (2020). Brood-stock management and early hatchery rearing of Arctic charr (Salvelinus alpinus(Linnaeus)). Reviews in Aquaculture. 12 , 1595-1623
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Abstract

Arctic charr (Salvelinus alpinus(Linnaeus)) is a stenothermic cold-water fish, which has been cultured in Northern Europe and North America since the 1980s. The industry has remained relatively small with an annual production between 6000 and 10 000 tonnes, and is still challenged by an unreliable offspring production. This review focuses on offspring production in Arctic charr aquaculture including holding conditions for brood-stock, fertilisation and egg rearing until hatch. Brood-stock requires low temperatures during summer (<12 degrees C) with the optimum still unknown. The temperature maximum for egg incubation lies between 6 and 8 degrees C. The composition of an optimal brood-stock diet is debated regarding fatty acids. A demand for a freshwater-based diet rich in omega-6 fatty acids is indicated, but results remain inconclusive. Extensive knowledge has been gained on the timing of spawning and its manipulation through photoperiod, temperature and hormone treatments; spawning can be induced by short-day photoperiod; and temperature drops to 5 degrees C. Eggs are fertilised dry in ovarian fluid. Egg quality is highly variable and positively related to egg size and energy density. Contrary, little information is available on sperm quality and its impact on egg survival. There may also be profound differences between Arctic charr of stationary or anadromous origin regarding requirements for holding conditions of brood-stock and their diet. However, these differences have received little attention, and direct comparative studies are in demand.

Authors/Creators:Olk, Tom Robin and Jeuthe, Henrik and Thorarensen, Helgi and Wollebaek, Jens and Lydersen, Espen
Title:Brood-stock management and early hatchery rearing of Arctic charr (Salvelinus alpinus(Linnaeus))
Year of publishing :2020
Volume:12
Page range:1595-1623
Number of Pages:29
Publisher:Wiley
ISSN:1753-5123
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:brood-stock husbandry, egg rearing, fertilisation, pre-hatch survival, Salvelinus alpinus
URN:NBN:urn:nbn:se:slu:epsilon-p-107756
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107756
Additional ID:
Type of IDID
DOI10.1111/raq.12400
Web of Science (WoS)000560558800019
ID Code:17553
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: SLUpub Connector
Deposited On:06 Oct 2020 07:45
Metadata Last Modified:06 Oct 2020 07:45

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