Effect of feeding a DHA-enriched nutriceutical on the quality of fresh, cooled and frozen stallion semen
Department of Large Animal Medicine and Surgery, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843-4475, USA. Theriogenology
(Impact Factor: 1.8).
04/2005; 63(5):1519-27. DOI: 10.1016/j.theriogenology.2004.07.010
Eight stallions were used in 2 x 2 crossover study to determine if feeding a nutriceutical rich in docosahexaenoic acid (DHA) would improve semen quality. Stallions were randomly assigned to one of two treatment groups (n = 4 per group). Stallions were fed their normal diet (control) or their normal diet top-dressed with 250 g of a DHA-enriched nutriceutical. Feeding trials lasted for 14 week, after which a 14-week washout period was allowed and the treatment groups were reversed for another 14 week feeding trial. Feeding the nutriceutical resulted in a three-fold increase in semen DHA levels and 50% increase in the ratio of DHA to DPA in semen. Sperm motion characteristics in fresh semen were unaffected by treatment. After 24 h of cooled semen storage in an Equitainer, total and progressive motility did not differ between treatment groups, but sperm from stallions fed the nutriceutical exhibited higher velocity and straighter projectory (P < 0.05). After 48 h of cooled storage, increases in the percentages of sperm exhibiting total motility (P = 0.07), progressive motility (P = 0.06) and rapid motility (P = 0.04), were observed when stallions were being fed the nutriceutical. For a subset of four stallions, whose progressive sperm motility was <40% after 24 h of cooled storage when fed the control diet, feeding the nutriceutical resulted in improvements in mean progressive motility of sperm after 24 h (P = 0.10) and 48 h (P = 0.03) of storage. Feeding the nutriceutical resulted in similar improvements in motion characteristics being observed in frozen-thawed semen. While it appears that feeding the nutriceutical may improve the motion characteristics of cool-stored stallion semen, it may be most beneficial for stallions of marginal fertility whose sperm do not tolerate the rigors of cooling and storage. The nutriceutical also appeared to improve the freezability of semen. More dramatic improvements in semen quality may be observed if modifications in the main fat content of the diet are incorporated with the DHA supplement.
Available from: Fawad Ur Rehman
- "Therefore the omega-3 rich food must be supplemented into their feed to fulfil the animal requirement. The Flaxseed has been extensively investigated for the fertility enhancement   . In this context, the current study was designed to investigate the effect dietary Flaxseed supplementation on sperm quality parameters in different dairy cattle bull breeds. "
- "In the last fifteen years, in various feeding experiments DHA or its precursors have been supplied to change the fatty acid composition of sperm membrane in order to improve sperm quality and fertility. Several different studies revealed that the fatty acid profile of sperm membrane can be modified with diet and, thus, improvement in sperm quality was demonstrated in a variety of livestock species including chicken (Zaniboni et al., 2006), turkey (Blesbois et al., 2004), boar (Maldjian et al., 2005); buffalo (Adeel et al., 2009) and stallion (Brinsko et al., 2005). However, diets that contain more PUFAs are associated with impaired antioxidant capacity of animal tissues, blood, and semen (Surai et al., 2000a; Castellini et al., 2003). "
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ABSTRACT: The aim of the present study was to examine the effects of feeding alpha-linolenic (ALA) acid on fatty acid composition and quality of bovine sperm and on antioxidative capacity of seminal plasma. Nine bulls (ALA bulls) were fed with 800g rumen-resistant linseed oil with a content of 50% linolenic acid and eight bulls with 400g palmitic acid (PA bulls). Sperm quality was evaluated for plasma membrane and acrosome intact sperm (PMAI), the amount of membrane lipid peroxidation (LPO), and the percentage of sperm with a high DNA fragmentation index (DFI). Fatty acid content of sperm was determined using gas chromatography. Total antioxidant capacity, glutathione peroxidase, and superoxide dismutase activity were determined in seminal plasma. Feeding ALA increased (P<0.05) the docosahexaenoic acid (DHA) content in bulls whereas in PA bulls did not change. PMAI increased after cryopreservation in ALA bulls as well as in PA bulls during the experiment period (P<0.005). LPO of sperm directly after thawing did not change during the study period in ALA group, but decreased in PA group (P<0.006). After 3h of incubation LPO increased in the ALA group (P<0.02), while LPO did not differ between phases within groups. In conclusion, feeding of neither saturated nor polyunsaturated fatty acids affect the antioxidant levels in seminal plasma. Both saturated as well as polyunsaturated fatty acids had positive effects on quality of cryopreserved bovine sperm, although the content of docosahexaenoic acid in sperm membranes increased only in ALA bulls.
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Available from: Behrooz Khalili
- "Lipids, present in both the sperm and seminal plasma, are involved not only in sperm energy metabolism, but also in many functions and events that lead to fertilization (Zaniboni et al., 2006). Semen from all domestic species contains high levels of polyunsaturated fatty acids (PUFAs) (Brinsko et al., 2005), but the nature of lipids depends on animal species. Whereas, fatty acids of the n − 6 series predominate in birds semen (Kelso et al., 1997), in most mammals, the fatty acid composition of sperm is characterized by very high proportions of omega-3 polyunsaturated fatty acids (n − 3), particularly docosahexaenoic acid (22:6 n − 3) (Kelso et al., 1997; Samadian et al., 2010). "
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ABSTRACT: Sixteen fertile rams were randomly allotted to four groups and fed either of the four diets for 14 weeks: (1) control diet (COD) without fish oil (FO) and vitamin C (VC), (2) diet containing 2.5% FO (FOD), (3) diet containing 300mg/kg DM VC (VCD), and (4) diet containing 2.5% FO and 300mg/kg DM VC (FCD). Semen was collected at 14-d intervals from 1 April to 10 July (out of the physiologic breeding season in Iran). Semen volume and percentages of motile and progressively motile sperm were increased by FO and VC feeding. A significant interaction was also found between FOD and VCD on motility and progressive motility percentage (P<0.05). HOS-test and percentage of sperm with normal acrosome improved significantly by FO and VC. Rams fed FCD had better HOS-test and higher proportion of sperm with normal acrosome than rams in other groups (82.4 and 93.6%, respectively). Diets containing FO and FO and VC increased the proportion of docosahexaenoic acid in sperm (P<0.05). The activity of lactate dehydrogenase in the seminal fluid was significantly affected by VC and the interaction between FO and VC (P<0.05). Blood metabolites, except glucose, were affected positively by FO. The results showed that dietary supplementation with FO and VC improved seminal quality and may have beneficial effects on fertility in Moghani rams.
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