The mean values of macroscopical and microscopical semen parameters are depicted in Table 1. Same amount of ejaculate volume was recorded by
Khandokar et al., (2006) in case of Black Bengal buck. However, higher ejaculate volumes were recorded by
Goswami et al., (2020). The differences in ejaculate volume might be due to differences in breed, age, season, frequency of ejaculation and age of the male animals
(Patni et al., 2016). In the present study, the mass activity of Pantja buck semen is in agreement with
Bitto and Egbunike (2012). The individual motility in the present study is in close harmony with
Patil et al., (2019). In contrary, higher values of individual motility was noted by
Atara et al., (2018) in Surti goat. These differences of sperm motility might be due to variation in breed, nutrition, environment and individual variation
(Umar et al., 2017). Similar to our study, same sperm concentration was also found by
Goswami et al., 2020. Though, the sperm concentration in the present experiment was not in accordance with
Mishra et al., (2010). Concentration may vary depending upon the breed, age of male animals, climate (macro and micro), season, geographical location, restraint, number of false mounting before collection and frequency of collection
(Foster et al., 1971). The present findings related to sperm viability are on the line of
Parmar et al., (2011). Different factors such as age, breed, nutrition of the sire, pH and osmolality of the semen, season and ambient temperature affects the viability of the spermatozoa. In case of sperm abnormalities, our results are in a close harmony with
Goswami et al., (2020). While,
Umar et al., (2017) documented higher values of sperm abnormalities.
Ahmed et al., (2014) in Beetal goat found similar HOST percentage with the present findings. Although,
Umar et al., (2017) reported higher percentage of HOST-reacted spermatozoa. The percentage of acrosome integrity in present study was in agreement with
Deori et al., (2018).
The mean levels of seminal plasma biochemical constituents are presented in Table 2. Somewhat similar range of ALT level was reported by
Sinha et al., (2000). However, a higher value of ALT was mentioned by
Umar et al., (2017) and lower values by
Sharma et al., (2013). The value of AST in present study was in the agreement with
Sharma et al., (2013), but in contrary to
Sinha et al., (2000). The seminal plasma LDH activity in the present study was similar the other studies conducted by
Umar et al., (2017). A very few literature is available about seminal plasma ALP activity in goat semen.
Ali and Mustafa (1986) reported higher level of seminal plasma ALP activity in Nubian goat. In the present study, seminal plasma glutathione peroxidase activity was also in the light of the findings of
Anand et al., (2016). The obtained value of seminal plasma albumin, globulin and total proteins in Pantja buck semen in our present study were closely related to the values reported by
Nidhi (2014). The calcium and phosphorus ions in the seminal plasma of Pantja bucks were in agreement with previously reported findings of
Nidhi (2014).
The level of correlation between the seminal plasma biochemical constituents and semen characteristics is represented in Table 3. Two tailed Pearson’s correlation analysis showed that seminal plasma ALT level has significant negative correlation (p≤0.01) with sperm mass activity, individual motility, plasma membrane integrity and acrosome integrity and a significant positive (p≤0.01) correlation with morphologically abnormal spermatozoa. Seminal plasma AST had a significant negative (p≤0.05) correlation with plasma membrane integrity and acrosome integrity and a significant (p≤0.05) positive correlation with morphologically abnormal spermatozoa. Glutamic oxaloacetate transaminase (GOT) or Aspartate transaminase (AST) and Glutamic pyruvate transaminase (GPT) or Alanine transaminase (ALT) activity in the seminal plasma are two very important indicator of plasma membrane stability of the spermatozoa
(Juyena and Stelletta. 2012). Level of GOT and GPT are negatively correlated with the percent live spermatozoa
(Taha et al., 2000). Umar et al., (2017) reported a significant positive relationship of seminal plasma ALT and AST level with morphologically abnormal spermatozoa and a significantly negative correlation of AST with plasma membrane integrity, which is in agreement with present study. On contrary the study indicated that seminal plasma ALT had significant positive correlation with HOST-reacted spermatozoa.
However, seminal plasma alkaline phosphatase (ALP) activity was exhibited significant (p≤0.01) positive correlation with ejaculate volume and spermatozoa concentration in the ejaculates. Viudes-De-Castro
et al. (2015) observed a significant positive correlation of ALP with sperm concentration in the ejaculates, which is in the harmony with the present study. The activity of ALP in seminal plasma is a biomarker of the sperm motility, metabolism, health status of the accessory sex glands and sperm plasma membrane integrity
(Gupta et al., 2019).
Lactate dehydogenase (LDH) showed significant negative correlation with ejaculates volume (p≤0.01), sperm concentration (p≤0.01) and positive correlation with spermatozoa viability (p<0.05). Previous studies also reported same results in agreement with the present findings
(Talluri et al., 2017).
Seminal plasma glutathione peroxidase activity exhibited significant (p≤0.01) positive correlation with mass activity, individual motility, viability, HOST-reacted spermatozoa and acrosome integrity and significant (p≤0.01) negative correlation with morphologically abnormal spermatozoa. Malondialdehyde (MDA) concentration had significant negative correlation with individual motility (p≤0.01), live sperm percentage (p≤0.05), plasma membrane integrity (p≤0.05) and acrosome integrity (p<0.05) and significant positive correlation with sperm morphological abnormality (p≤0.05). Glutathione peroxidase present in the seminal plasma acts as endogenous antioxidants and neutralizes the free radicals. Similarly,
Crisol et al., (2012) reported a significant positive correlation of seminal plasma glutathione peroxidase activity with total sperm motility, progressive motility and normal spermatozoa percentage.
Seminal plasma albumin, globulin and total protein showed significant (p≤0.01) positive correlation with volume, mass activity, individual motility, live sperm percentage, plasma membrane and acrosome integrity and negative correlation with sperm morphological abnormalities. Seminal plasma calcium and phosphorus levels were positively correlated with mass activity and individual motility of spermatozoa. The present findings are in agreement with
Umar et al., (2017). Seminal plasma calcium had a significant (p≤0.05) positive correlation with mass motility and individual motility. Similarly, seminal plasma phosphorous showed a significant positive correlation with mass motility (p≤0.05) and individual motility (p≤0.01). Correlation of seminal plasma calcium and phosphorus also reported in earlier study
(Umar et al., 2017).
Table 4 represents the correlation between the biochemical constituents of seminal plasma. ALT and AST positively (p≤0.01) correlated with each other and showed negative correlation with GSH-Px (p≤0.05). ALP had significant (p≤0.01) negative correlation with LDH. However, LDH exhibited significant positive (p≤0.05) correlation with MDA concentration and significant negative (p≤0.01) correlation with seminal plasma albumin, globulin and total protein. Seminal plasma glutathione peroxidase activity had significant (p≤0.01) positive correlation with albumin, globulin and total protein. Oppositely, MDA showed significant (p≤0.01) negative correlation with above three constituents. Furthermore, seminal plasma albumin, globulin and total protein was positively correlated with each other (p≤0.01). Calcium revealed significant (p≤0.05) positive correlation with GSH-Px, globulin and total protein. Similarly, phosphorus showed significant (p≤0.05) positive correlation with GSH-Px, albumin, globulin and total protein. Calcium and phosphorus was significantly (p≤0.01) correlated with each other. Similar findings were also observed by
Umar et al., (2017).