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Fatty Acid Composition of Eggs and its Relationships to Egg and Larval Viability from Domesticated Common Sole ( Solea solea ) Breeders
Author(s) -
Parma L,
Bonaldo A,
Pirini M,
Viroli C,
Parmeggiani A,
Bonvini E,
Gatta PP
Publication year - 2015
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/rda.12466
Subject(s) - hatching , biology , broodstock , polyunsaturated fatty acid , zoology , composition (language) , larva , human fertilization , reproduction , fatty acid , fishery , aquaculture , ecology , fish <actinopterygii> , biochemistry , anatomy , linguistics , philosophy
Contents The study of lipids and fatty acids ( FA s) has been used in the assessment of egg quality because their composition can influence the fertilization rate, hatching, survival and growth of marine fish larvae. For these reasons, the lipid content ( TL ) and fatty acid composition of common sole ( Solea solea ) eggs were measured and correlated to egg and larval viability parameters throughout an entire reproductive season. Seventeen batches of fertile eggs obtained from natural spawning of captive breeders were characterized for the TL , FA profile, hatching rate ( HR ) and survival rate of larvae ( SR ) at 0–6 days post‐hatching (dph). The egg FA composition reflected the composition of the feed supplied to the broodstock during summer and autumn (before and during vitellogenesis) rather than that supplied during the spawning season. In general, the egg FA profile showed minimal differences among the early‐, mid‐ and late‐spawning periods (possibly due to the change of the diet and/or water temperature) indicating that it is possible to obtain a similar egg quality in terms of egg FA profile over 2 months of spawning. Saturated FA s and monounsaturated FA s ( MUFA ) were positively correlated with HR , while TL , 22 : 6n‐3 ( DHA ), 20 : 4n‐6 ( ARA ), polyunsaturated FA s of the (n‐3) series (n‐3 PUFA ) and polyunsaturated FA s of the (n‐6) series were negatively correlated (p ≤ 0.05). MUFA , 20 : 5n‐3 ( EPA ), n‐6/n‐3 were positively correlated with SR , while DHA , n‐3 PUFA , DHA / EPA were negatively correlated (p ≤ 0.05). In conclusion, the feed supplied before and during vitellogenesis has a major role in determining the egg FA profile in common sole. The relationships found between TL and FA s with egg and larval viability parameters differ from many other farmed marine fish species, which may suggest the need for a specific broodstock feed for this species.