Effect of parental origin on early life history traits of European eel.

Autor: Benini E; STMI Aqua Systems, Copenhagen, Denmark., Politis SN; National Institute of Aquatic Resources, Technical University of Denmark, Copenhagen, Denmark., Kottmann JS; National Institute of Aquatic Resources, Technical University of Denmark, Copenhagen, Denmark., Butts IAE; School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama., Sørensen SR; National Institute of Aquatic Resources, Technical University of Denmark, Copenhagen, Denmark.; Billund Aquaculture Service, Billund, Denmark., Tomkiewicz J; National Institute of Aquatic Resources, Technical University of Denmark, Copenhagen, Denmark.
Jazyk: angličtina
Zdroj: Reproduction in domestic animals = Zuchthygiene [Reprod Domest Anim] 2018 Oct; Vol. 53 (5), pp. 1149-1158. Date of Electronic Publication: 2018 Jun 25.
DOI: 10.1111/rda.13219
Abstrakt: Establishment of European eel (Anguilla anguilla) hatchery production will rely on selectively bred individuals that produce progeny with the best traits in successive generations. As such, this study used a quantitative genetic breeding design, between four females and nine males (four wild-caught and five cultured), to investigate the effect of paternal origin (wild-caught vs. cultured) and quantify the relative importance of parental effects, including genetic compatibility, on early life history (ELH) performance traits (i.e. fertilization success, embryonic survival at 32 hr post-fertilization, hatch success and larval deformities at 2 days post-hatch) of European eel. Wild-caught males had higher (56%) spermatocrit values than cultured males (45%), while fertilization success, embryonic survival, hatch success and larval deformities were not significantly impacted by paternal origin. This demonstrates that short-term domestication of male eels does not negatively affect offspring quality and enables the consideration of cultured male broodstock in future breeding programmes. Moreover, paternity significantly explained 9.5% of the variability in embryonic survival, providing further evidence that paternal effects need to be taken into consideration in assisted reproduction protocols. Furthermore, maternity significantly explained 54.8% of the variation for fertilization success, 61.7% for embryonic survival, 88.1% for hatching success and 62.8% for larval deformities, validating that maternity is a major factor influencing these "critical" ELH traits. At last, the parental interaction explained 12.8% of the variation for fertilization success, 8.3% for embryonic survival, 4.5% for hatch success and 20.5% for larval deformities. Thus, we conclude that eggs of one female can develop more successfully when crossed with a compatible male, highlighting the importance of mate choice for successful propagation of high-quality offspring. Together, this knowledge will improve early offspring performance, leading to future breeding programmes for this critically endangered and economically important species.
(© 2018 Blackwell Verlag GmbH.)
Databáze: MEDLINE
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