Publications by authors named "Birgitte Narud"
Article Synopsis
- Cold storage and freezing of Atlantic salmon milt can impact sperm functionality and fertilization ability, prompting a study to compare quality under different conditions.
- The researchers examined milt from eight mature males, storing samples at 2°C and 8°C for up to 4 days, then performing fertilization trials to assess various sperm quality parameters.
- Results showed that higher storage temperatures adversely affected sperm quality and fertilization rates, with certain sperm parameters and metabolites correlating significantly with fertility outcomes.
In this study, the complexity of chromatin integrity was investigated in frozen-thawed semen samples from 37 sires with contrasting fertility, expressed as 56-day non-return rates (NR56). Protamine deficiency, thiols, and disulfide bonds were assessed and compared with previously published data for DNA fragmentation index (DFI) and high DNA stainability (HDS). In addition, in vitro embryo development and sperm DNA methylation were assessed using semen samples from 16 of these bulls.
View Article and Find Full Text PDFGenomic selection in modern farming demands sufficient semen production in young bulls. Factors affecting semen quality and production capacity in young bulls are not well understood; DNA methylation, a complicated phenomenon in sperm cells, is one such factors. In this study, fresh and frozen-thawed semen samples from the same Norwegian Red (NR) bulls at both 14 and 17 months of age were examined for sperm chromatin integrity parameters, ATP content, viability, and motility.
View Article and Find Full Text PDFIn the dairy breeding industry, prediction of bull fertility in artificial insemination (AI) is important for efficient and economically sustainable production. However, it is challenging to identify bulls with superior fertility applying conventional in vitro sperm assays. In the present study, sperm functionality was investigated to identify a multivariate model that could predict fertility.
View Article and Find Full Text PDFBackground: Sperm DNA integrity is considered essential for successful transmission of the paternal genome, fertilization and normal embryo development. DNA fragmentation index (DFI, %) has become a key parameter in the swine artificial insemination industry to assess sperm DNA integrity. Recently, in some elite Norwegian Landrace boars (boars with excellent field fertility records), a higher level of sperm DFI has been observed.
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