Seasonal Changes in Testicular Cell Morphology in Domestic Male Cats (<i>Felis catus</i>)

Stornelli, María Alejandra; Reyna, JC; Favre, R; Savignone, C.A.; Tittarelli, Claudia Marcela; Sota, Rodolfo Luzbel de la

doi:10.1111/j.1439-0531.2009.01448.x

Cited by 15 publications

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“…In agreement, testicles from males orchiectomized during long hours days had a lower percentage of round and elongated sperm compared to testicles from males orchiectomized during short hours days (Stornelli et al. ). It has been reported that the number of sperm collected by electroejaculation was different between the non‐breeding seasons and breeding seasons of male cats in Australia (Johnstone ).…”

Section: Discussionmentioning

confidence: 63%

“…Recent studies show seasonal changes in testicular cell morphology in domestic cat (Stornelli et al. ). Stornelli et al.…”

Section: Discussionmentioning

confidence: 99%

“…In those, photoperiod and melatonin concentrations are related to circannual sperm production. Recent studies show seasonal changes in testicular cell morphology in domestic cat (Stornelli et al 2009). Stornelli et al (2009) found that testicles from males orchiectomized during long hours days had a higher percentage of tubules with tailed sperm and mature sperm (ready to be release from Sertoli cells) compared to testicles from males orchiectomized during short hours days.…”

Section: Discussionmentioning

confidence: 99%

“…Likewise, the effect of season on reproductive function in the male domestic cat has been insufficiently explored. Whereas previous studies concluded that male cats are not seasonal in sperm production (Spindler and Wildt 1999;Franca and Godinho 2003), more recent studies challenge those findings and suggest seasonality of sperm production (Axner and Linde Forsberg 2007;Blottner and Jewgenow 2007;Stornelli et al 2009). Previous studies have shown seasonal changes in testicular cell morphology in domestic cats (Stornelli et al 2009).…”

Section: Introductionmentioning

confidence: 90%

“…Previous studies have shown seasonal changes in testicular cell morphology in domestic cats (Stornelli et al. ). Probably, these changes are reflected in seasonal variations of epididymal sperm quality.…”

Section: Introductionmentioning

confidence: 96%

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Effect of Natural Photoperiod on Epididymal Sperm Quality and Testosterone Serum Concentration in Domestic Cat (Felis silvestris catus)

Favre

Bonaura

Tittarelli

et al. 2012

Reprod Domestic Animals

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ContentsThe aim of this study was to assess epididymal sperm characteristics and serum testosterone concentration in cats under natural photoperiod. The hypothesis was that natural photoperiod induces seasonal changes in spermatozoal quality and serum testosterone concentration. Mixed breed tomcats (n = 43) that underwent bilateral orchiectomy at a municipal public pet shelter were used in the study. Epididymides were divided into two groups according to time of castration. In Group I, toms were castrated during increasing light (IL; [winter and spring; n = 24]), and group II, during decreasing light (DL; [summer and fall; n = 19]). Only mature toms castrated in the two lasts weeks of each season were included in this study. Sperm samples were obtained by cutting the cauda epididymis in Tris solution and tested for motility (MOT,% motile), velocity (VEL, 0-5), total sperm cells (TS, 10 6 ), acrosome integrity (ACR,% intact; FITC-PSA), plasma membrane integrity (MI,%intact; CFDA-PI) and sperm morphology (SM,% normal). Before orchiectomy, blood samples were taken to measure serum concentrations of testosterone (T2) by a solid-phase RIA. Data were analysed with the mixed procedure of SAS. Toms castrated during IL had higher sperm plasma membrane integrity and better sperm morphology compared to toms castrated during DL (69.0 ± 2.7 vs 60.6 ± 2.1, p < 0.01; 45.9 ± 2.5 vs 35.9 ± 3.4; p < 0.02; respectively) and tended to have higher sperm motility and total number of sperm cells compared to toms castrated during DL (56.3 ± 2.8 vs 47.3 ± 3.7, p < 0.06; 13.8 ± 1.4 vs 10.0 ± 1.8, p < 0.09). However, velocity, acrosome integrity and serum testosterone concentrations were similar between both groups (3.5 ± 0.1 vs 3.4 ± 0.1, p > 0.6; 45.8 ± 3.3 vs 44.0 ± 4.0, p > 0.72; 0.76 ± 0.15 vs 0.59 ± 0.19, p > 0.51; respectively). In conclusion, natural photoperiod induces seasonal changes in sperm quality with a moderate variation in serum testosterone concentrations. IntroductionThe queen is a seasonal breeder when exposed to natural photoperiod, with ovarian activity ceasing under decreasing photoperiod and resuming with increasing photoperiod. This seasonality may be observed in both females and males of several mammalian species, and in these species, photoperiod and melatonin concentrations are related to circannual sperm production (Chemineau et al. 2008). This seasonality is observed in geographic locations where large differences between hours of light during the year are present and occurs as an adaptation to annual changes in the habitat (Malpaux et al. 2001;Chemineau et al. 2008). Although the reproductive features of queens are well known, in tom cats, there are few studies about sperm production. Likewise, the effect of season on reproductive function in the male domestic cat has been insufficiently explored. Whereas previous studies concluded that male cats are Previous studies have shown seasonal changes in testicular cell morphology in domestic cats (Stornelli et al. 2009). Probably, these changes are reflected in se...

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Section: Discussionmentioning

confidence: 63%

“…Recent studies show seasonal changes in testicular cell morphology in domestic cat (Stornelli et al. ). Stornelli et al.…”

Section: Discussionmentioning

confidence: 99%