Predicting ejaculate quality and libido in male ostriches: Effect of season and age

Bonato, Maud; Malecki, Irek; Rybnik-Trzaskowska, P.K.; Cornwallis, Charlie K.; Cloete, S.W.P.

doi:10.1016/j.anireprosci.2014.09.015

Cited by 23 publications

(21 citation statements)

References 35 publications

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“…The latter result can possibly be explained by the method of motility evaluation (Bonato et al, 2014). Results from the present study, however, were consistent with previous results in studies with free-range chickens where sperm motility decreased with decreased photoperiod and temperature particularly during the winter season (Santiago-Moreno et al, 2009).…”

Section: Effects Of Season Dilution and Year On Sperm Variablessupporting

confidence: 93%

“…The LIVE and HOS variable means in the present study were different between seasons being greatest in the spring for LIVE and HOS, compared to the winter. These results are consistent with those of Bonato et al (2014) where it was reported that percentage of live-normal sperm as determined from Nigrosin/Eosin stained slides was greater for ostrich males in the spring to early summer compared to the winter season.…”

Section: Effects Of Season Dilution and Year On Sperm Variablessupporting

confidence: 91%

“…Different seasons may affect fresh semen variables, resulting in impacts on fertilization success of the male (natural or AI systems) as well as the percentage of sperm surviving processing for short-and long-term storage. The first account of ostrich seasonality on ejaculate quality in terms of sperm cell volume, concentration, motility score, morphology as well as libido was reported by Bonato et al (2014). However, a detailed functional assessment of sperm had not been considered for the ostrich until the present study was conducted.…”

Section: Effects Of Season Dilution and Year On Sperm Variablesmentioning

confidence: 98%

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Classification of ostrich sperm characteristics

Smith

Bonato

Dzama

et al. 2016

Animal Reproduction Science

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The success of assisted reproduction techniques is dependent on a sound foundation of understanding sperm characteristics to evaluate so as to improve semen processing. This study offers a descriptive basis for ostrich semen quality in terms of sperm function characteristics (SFC) that include motility, measured by computer assisted sperm analysis CASA (SCA(®)), viability (SYBR14/PI) and membrane integrity (hypo-osmotic swelling test). Relationships among these SFC's were explored and described by correlations and regressions. Certain fixed effects including the dilution of semen, season, year and male associated with semen collection were interpreted for future applications. The seasonal effect on sperm samples collected throughout the year suggested that it is prudent to restrict collections to spring and summer when SFC's and sperm concentration are maximized, compared to winter when these aspects of sperm quality are suppressed. Dilution of ejaculates helped to maintain important SFC's associated with fertilization success. The SFC's and sperm concentration varied among males, with specific males, having greater values for the percentage of motile (MOT) and progressively motile (PMOT) sperm, as well as sperm velocity (VCL, VSL, VAP) and linearity (LIN) variables. Males may thus be screened on these variables for inclusion in an artificial insemination (AI) programme to optimize fertility success rates.

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Section: Effects Of Season Dilution and Year On Sperm Variablessupporting

confidence: 93%

Section: Effects Of Season Dilution and Year On Sperm Variablessupporting

confidence: 91%

Section: Effects Of Season Dilution and Year On Sperm Variablesmentioning

confidence: 98%

See 1 more Smart Citation

Classification of ostrich sperm characteristics

Smith

Bonato

Dzama

et al. 2016

Animal Reproduction Science

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“…; Bonato et al. ). To date, to the best of our knowledge, in the literature are lacking a similar data of experiments carried out through several reproductive seasons, on both domesticated and wild birds.…”

Section: Resultsmentioning

confidence: 97%

“…; Bonato et al. ), frequency and semen collection technique (Tan ; Pawluczuk and Grunder ) and individual male characteristics (Wishart and Palmer ; Robertson et al. ).…”

Section: Introductionmentioning

confidence: 99%

The Usefulness of Captive Kept Capercaillie (Tetrao urogallusL.) as the Semen Donors for Artificial Insemination and Gene Pool PreservationIn vitro

Łukaszewicz

Kowalczyk

2015

Reprod Domestic Animals

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Captive breeding of birds threatened by extinction in zoological gardens or other closed aviary centres is one of the methods allowing their protection and gene pool preservation ex situ in vivo. Such birds are usually kept in captivity lifelong and serve as parents of several new generations that can be further released into natural environment, or males are used as semen donors for artificial insemination and gene banking. Therefore, the fecundity of such flocks (number of laid egg and spermatozoa quantity and quality) is very important. The aim of this study was to evaluate the usefulness of captive kept capercaillie (Tetrao urogallus L.) as semen donors in three subsequent reproductive seasons, based on the assessment of manually collected semen quality. Male response to dorso-abdominal massage, ejaculate volume, sperm concentration, motility and morphology were evaluated individually at three succeeding years. Depending on individual male properties and year of collection, the number of positive reactions to semen collection attempts (i.e. ending with ejaculation) varied from 44.4% to 100.0%; single ejaculate volume ranged from 10 to 300 μl, spermatozoa concentration from 10 × 10(6) per ml to 3520 × 10(6) per ml and percentage of live morphologically normal spermatozoa from 19.3 to 80.3%. The highest average value (66.7) of semen quality factor (SQF) was noted for a 2-year-old male (varying from 1.9 to 258.1), while the lowest for ten- (4.8; varying from 0.1 to 17.0) and 7-year-old (6.6; varying between 0.6 and 13.6). Assuming that for AI purposes, the ejaculate quality has to be at minimum 10 SQF, obtained results indicate that majority of capercaillie kept in captivity, both young (2-3 years old) and older (up to 10 years old), can be valuable semen producers in succeeding seasons.

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Ostrich ejaculate characteristics and male libido around equinox and solstice dates

Muvhali

Bonato

Malecki

et al. 2020

Trop Anim Health Prod

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The study evaluated the effect of time of the year in which changes in photoperiod occurs on ostrich semen characteristics and male libido. Semen was collected for five days before, on and five days after winter solstice (21 st June 2016), spring equinox (22 nd September 2016), summer solstice (21 st December 2016) and autumn equinox (20 th March 2017) in the southern hemisphere. Semen was collected from 10 South African Black ostrich males (average age ± standard deviation: 4.5 ± 2.27 years) using the dummy female. Semen volume, sperm concentration, total sperm per ejaculate, sperm motility traits, percentage of normal sperm, head and tail abnormalities and percentage of affected sperm in the hypo-osmotic swelling test (HOS) were evaluated. Male libido defined as the willingness of males to mount the dummy female was also recorded. Semen samples collected around summer solstice, spring and autumn equinox were higher in sperm concentration and sperm output compared to winter solstice (P < 0.05). Study periods did not influence semen volume, sperm motility traits, the percentage of normal sperm, head abnormalities and HOS. Tail abnormalities were higher around winter solstice than around spring equinox (P < 0.05). Male libido and the success of semen collection were significantly higher around spring equinox (P < 0.05). Changes in photoperiod in the southern hemisphere do not affect semen production in ostriches. However, high sperm output and male libido around spring equinox 2 and summer solstice dates suggest that these periods may be preferred for semen collection for artificial insemination and storage purposes.

show abstract

Predicting ejaculate quality and libido in male ostriches: Effect of season and age

Cited by 23 publications

References 35 publications

Classification of ostrich sperm characteristics

Classification of ostrich sperm characteristics

The Usefulness of Captive Kept Capercaillie (Tetrao urogallusL.) as the Semen Donors for Artificial Insemination and Gene Pool PreservationIn vitro

Ostrich ejaculate characteristics and male libido around equinox and solstice dates

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