Tracing transgenerational plasticity through ova fatty acid biomarkers in Giant Kōkopu ( Galaxias argenteus )

• DOI: 10.1080/00288330.2024.2324815
• Publication Date: 2024-03-07T22:33:21Z
• Authors: Armagan Sabetian; Luu Huong Hoang; Jingjing Zhang; Julian Lilkendey
• Keywords: Transgenerational epigenetics; Tracing

Broodstock management has traditionally focused on heritable traits and diet-induced gamete quality. However, the potential of transgenerational plasticity (TP) underscores importance understanding adaptive trait transfer in aquaculture, where sustainability production can be hampered by mortality arising from disease stress. Notably, role fatty acids (FAs) as important biomarkers is an untapped area TP research with implications for new aquaculture species. We assessed Giant Kōkopu (Galaxias argenteus) comparing ova FA profiles broodstock across five captive generations; wild-caught, F1, three successive F2s. Our study revealed intergenerational shifts profiles. encountered a significant decline C18:1 (n-9) (Oleic Acid, OLA) C20:4 (n-6) (Arachidonic acid, ARA), increase C16:0 (Palmitic PAL) wild-caught to captive-bred broodstock. These reveal that latter generations G. argenteus are reducing provision FAs associated stress (OLA) lower reproductive success (ARA), while increasing those linked improved immune response (PAL), signalling adaptation captivity. findings help elucidate theoretical through use biomarkers, providing practical insight management.