Effects of different equilibration conditions on cryopreserved bovine sperm quality

Ekilibrasyon, spermanın sıcaklığının düşürüldüğü ve faz değişimlerinin meydana geldiği aşama olarak, sperma dondurulmasında en önemli basamaklardan biridir. Ekilibrasyonun gerçekleştirildiği ortam çoğu zaman göz ardı edilmekte, ekilibrasyon koşullarının başarısı ampirik tecrübelere dayanmaktadır. Bu çalışmanın amacı farklı ekilibrasyon ortamlarının toplam motilite (TMOT), progresif motilite (PMOT), spermatozoa hareket parametleri (VCL, VSL, VAP, LIN, STR, WOB, ALH, BCF), plazma membran ve akrozom bütünlüğü (PMAI) ve DNA fragmentasyon indeksi (DFI) üzerine etkisinin araştırılmasıdır. Çalışmada 4 baş boğadan iki kez sperma alınarak üç eşit hacme bölündü. Andromed® ile sulandırılan spermalar 24 saat 4°C’de payet içinde (Deneme 1), kapta (Deneme 2) ve çalkalayıcıda (Deneme 3) ekilibrasyona bırakıldı. Çözüm sonu sperma kalitesi TMOT, PMOT, VCL, VSL, VAP, LIN, STR, WOB, ALH, BCF, PMAI ve DFI parametreleri değerlendirilerek belirlendi. Farklı ekilibrasyon koşulları arasında, hareket özellikleri olan TMOT, PMOT, VSL, VAP, BCF ve morfolojik özellikler olan PMAI ve DFI açısından istatistiki bir farklılık bulunamadı (p>0,05). En yüksek VCL değeri Deneme 3’te, en yüksek LIN, STR, WOB ve ALH değerleri Deneme 2’de gözlendi (p0.05) depending on equilibration conditions for TMOT, PMOT, VSL, VAP, BCF as kinetic parameters and for PMAI and DFI as morphological parameters. The highest VCL value was observed in experiment 3, when the highest LIN, STR, WOB and ALH values were observed in experiment 2 (p<0.05). The results show that changes in equilibrating condition have no detrimental effect on post-thaw bull semen quality. In addition, it can be said that equilibrating bull semen in a shaker presents some kinetic benefits in contrast with cup or straw equilibration methods

The use of infrared thermography to detect the stages of estrus cycle and ovulation time in anatolian shepherd dogs

Abstract Background The aim of the study is to evaluate the effectiveness of thermographic monitoring, using the temperature changes of perianal and perivulvar areas for the determination of estrus in Anatolian Shepherd bitches. Fifteen bitches were used in the study. Blood and vaginal smear samples were collected and thermographic monitoring of perianal and perivulvar areas were carried out starting from proestrus to early diestrus. Also, external signs of estrus were investigated. Smear samples were evaluated by light microscopy after Diff-Quik staining method and superficial and keratinized superficial cells were determined as percentage (S + KS%). Progesterone and luteinizing hormone measurements were done by radioimmunoassay. The difference in temperature between perianal and perivulvar areas was evaluated through thermographic images by FLIR ResearchIR Software. Results According to the results obtained from the study, differences between progesterone and S + KS% were statistically significant (P  0,05). Serum luteinizing hormone levels did not sign any difference (P > 0,05). Conclusions As a result, thermographic monitoring alone is not enough for estrus detection in Anatolian Shepherd bitches. However, it can be used to assist the actual estrus detection technique in terms of providing some foreknowledge by evaluating the differences in temperature

Investigation of the effects of syringic acid supplemented to Tris semen diluent on ram semen freezability

To the best of our knowledge, no research has been conducted to test the effects of syringic acid (SA) on ram semen freezing within the scope of natural antioxidants added to semen extenders. Therefore, this study had two main objectives. First, to test whether adding SA to ram semen freezing extender has a protective effect and contributes positively to sperm kinetic, plasma and acrosome integrity, mitochondrial membrane potential, lipid peroxidation, oxidant and antioxidant and DNA damage parameters after thawing. Second, it was to determine at what concentration the SA supplemented to the extender could be applied by in vitro studies by preserving the fertilization ability of frozen semen at the highest level. In the study, six individuals of Sönmez rams were used. The semen was collected from the rams using an artificial vagina and pooled. The pooled semen was divided into five different groups and extended with 0, 0.5, 1, 2 and 4 mM SA (control C, SA0.5, SA1, SA2 and SA4, respectively). After dilution, the semen samples were kept at 4°C for 3 h, then loaded into 0.25 mL straws and frozen in liquid nitrogen vapour. The SA1 and SA2 groups were higher plasma membrane and acrosome integrity (PMAI), high mitochondrial membrane potential (HMMP), plasma membrane integrity and motility compared to other groups (p <.05). It was observed that SA supplemented to the Tris extender significantly reduced DNA damage, and the lowest values were obtained especially in the SA1 and SA2 treatments (p <.05). Also, lowest MDA level was determined at the SA1 and this was statistically significant compared to SA4 and C (p [removed

Use of infrared thermography during ejaculation process and Its link with semen quality and freezability in dogs

This study aimed to describe the thermal variation of external reproductive tracts during ejaculation in relation to sperm quality in dogs. Forty-six adult fertile dogs were monitored using a thermal camera before, during and after the semen collection, taking into account penile and scrotal temperatures as reproductive thermal patterns while eye and perianal temperatures were recorded as complementary thermal patterns of behavioral response. The parameters were classified depending on age (≤4 years and >4 years), body weight (BW) (≤75 kg and >75 kg), sperm concentration (CON) (≤300 million and >300 million), total testicular volume (TTV) (≤600 cm3 and >600 cm3) and total ejaculation time (TET) (≤800 s and >800 s) of the animals from which semen was collected successfully. Heavier males (p < 0.05) that have more consistent testicles (p < 0.01) as well as quicker ejaculate responders (p < 0.001) and lower scrotal temperature had better semen (Δ motility) freezability. The lower eye temperature prior to the ejaculation (p < 0.01), lower scrotal temperature following ejaculation (p < 0.01), and conversely, higher penile temperature during the ejaculation (p < 0.001) had a higher sperm concentration. Furthermore, the sperm freezability was negatively correlated with total ejaculation time (r = -0.39, p < 0.05) and sperm abnormalities were lower in the ejaculate of dogs having a higher temperature of the scrotum, bulbus and penis. In conclusion, infrared monitoring throughout semen collection in dogs can provide information on behavioral reactions during human manipulation, as well as semen quality and testicular functionality