There is very scanty information about the trace mineral status during periparturient period in goats, therefore the present study was undertaken with the objective to determine the variations in the blood levels of zinc, copper, iron, manganese and cobalt at various stages of periparturient period in various breeds of goats
Blood levels of zinc (Zn), copper (Cu), iron (Fe) manganese (Mn) and cobalt (Co) were found to be similar in the recognized breeds (Jamunapari, Barbari and Jakharana) of goats at different stages of periparturient period, but the values were found significantly lower at different stages of periparturient period in the non-descript breed of goats in comparison to the recognized breeds under study (Table 1-5). The recognized breeds of goats under study were maintained on the semi-intensive system of rearing at organized farms of the institute and they have continuous supplementation of fodder and concentrates in the diet apart from grazing. However, non-descript breed of selected goats only maintained on free-range grazing systems at farmers field flock by local villagers and therefore they are absolutely dependent on pasture only for trace minerals as they have very limited or no opportunities of trace mineral supplements via fodder and concentrates, hence it may be due to poor nutritional status of non-descript goats of farmers field flocks, because they are only maintained on grazing which may exhibit trace mineral deficiency as soils and forages contain limited concentrations (Hill and Shannon 2019). The status of trace minerals in blood is directly depending on diet or nutritional status of the animals (Condron et al. 2000). These findings simulates with earlier report about the status of trace minerals in cattle of Mathura and adjoining areas, deficit of copper in heifers (Gupta et al. 2015) and copper, zinc and cobalt in cattle had been reported (Sharma et al. 2006).
Table 1
Mean±SE values of Zinc (mg/L) in blood of various breeds of goats during periparturient period
Groups/Breeds | Mid gestation | 4 week prepartum | Parturition | 4 week post partum |
Jamunapari | 1.836 ±0.044 | 1.866 ±0.033 | 2.535a ±0.030 | 1.857 ±0.028 |
Barbari | 1.827 ±0.030 | 1.846 ±0.031 | 2.537b ±0.030 | 1.821 ±0.027 |
Jakharana | 1.851 ±0.025 | 1.864 ±0.017 | 2.568c ±0.023 | 1.824 ±0.017 |
Non-descript | 1.616A ±0.039 | 1.645B ±0.034 | 2.226Cd ±0.024 | 1.621D ±0.034 |
Mean with different superscript (A-D) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-d) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 2
Mean±SE values of Copper (mg/L) in blood samples of various breeds of goats during periparturient period
Groups / Breeds | Mid gestation | 4 week prepartum | Parturition | 4 week post partum |
Jamunapari | 4.831a ±0.055 | 4.744a ±0.048 | 3.388b ±0.063 | 2.339c ±0.059 |
Barbari | 4.824d ±0.060 | 4.687d ±0.042 | 3.368e ±0.064 | 2.348f ±0.044 |
Jakharana | 4.812g ±0.056 | 4.745g ±0.043 | 3.399h ±0.060 | 2.343i ±0.038 |
Non-descript | 3.859Aj ±0.079 | 3.779Bj ±0.079 | 2.185Ck ±0.141 | 1.77Dl ±0.096 |
Mean with different superscript (A-D) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-l) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 3
Mean±SE values of Iron (mg/L) in blood of various breeds of goats during periparturient period
Groups/Breeds | Mid gestation | 4 week prepartum | Parturition | 4 week post partum |
Jamunapari | 2.41 ±0.06a | 2.83 ±0.07b | 1.69 ±0.06c | 1.95 ±0.04d |
Barbari | 2.42 ±0.08a | 2.80 ±0.03b | 1.58 ±0.06c | 1.89 ±0.05d |
Jakharana | 2.61 ±0.07a | 2.94 ±0.06b | 1.75 ±0.04c | 2.03 ±0.05d |
Non-descript | 2.11 ±0.03Aa | 2.41 ±0.04Bb | 1.36 ±0.04Cc | 1.69 ±0.03Dd |
Mean with different superscript (A-D) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-d) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 4
Mean±SE values of Manganese (mg/L) in blood of various breeds of goats during periparturient period
Groups/Breeds | Mid gestation | 4 week prepartum | Parturition | 4 week post partum |
Jamunapari | 2.59 ± 0.04a | 3.26 ±0.07b | 1.54 ±0.05c | 1.97 ±0.06d |
Barbari | 2.57 ±0.04a | 3.41 ±0.08b | 1.57 ±0.05c | 1.99 ±0.05d |
Jakhrana | 2.60 ±0.04a | 3.28 ±0.07b | 1.56 ±0.05c | 1.98 ±0.05d |
Non-descript | 1.76 ±0.05Aa | 2.74 ±0.07Bb | 1.24 ±0.02Cc | 1.56 ±0.03Dd |
Mean with different superscript (A-D) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-d) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 5
Mean±SE values of Cobalt (µg/L) in blood of various breeds of goats during periparturient period
Groups/Breeds | Mid gestation | 4 week prepartum | Parturition | 4 week post partum |
Jamunapari | 149.31 ±4.12a | 181.30 ±2.20b | 79.78 ±1.53c | 135.87 ±1.60d |
Barbari | 149.66 ±3.65a | 181.48 ±1.51b | 79.72 ±1.28c | 136.52 ±1.80d |
Jakharana | 150.19 ±3.88a | 181.17 ±2.04b | 79.18 ±1.41c | 137.16 ±1.49d |
Non-descript | 105.21 ±2.21Aa | 126.16 ±3.63Bb | 65.40 ±0.89Cc | 92.19 ±1.32Dd |
Mean with different superscript (A-D) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-d) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
It was also observed in the all the breed of goats under study that the blood levels of Zn, Fe, Mn and Co showed increasing trends from mid gestation to parturition and thereafter it showed a decreasing trend from parturition to four weeks post-partum, these finding observed in present investigation are in partial agreement of the finding in which it was reported that decreasing tendency of iron towards parturition, increasing trend for zinc and copper at the day of parturition and increase thereafter in buffaloes (Akhtar et al. 2009). The variations of trace minerals during gestation was reported that concentrations of essential trace micro minerals (Cu, Zn, Fe) decreased during pregnancy or late period of gestation in single and twin pregnant ewes (Abdollahi et al. 2013). Blood level of Cu showed a decreasing trend throughout the periparturient period in present investigation, which is in the accordance of the findings earlier reported by various workers that copper in serum was higher at estrus and depressed on the day of calving (Small 1997; Xin et al. 1993). Significant increase in blood Mn concentrations with increasing gestational age had been reported (Mora et al. 2014). Variation in the level of cobalt during periparturient period could not be explained due to paucity of literature. These variations in trace minerals during periparturient period in present investigation may be in response to colostrogenesis (Meglia et al. 2001).
Colostrum and milk levels were also assessed in the selected goats and it was observed that zinc (Zn), copper (Cu), iron (Fe) manganese (Mn) and cobalt (Co) levels were found to be similar in the recognized breeds (Jamunapari, Barbari and Jakharana) of goats of organized farms (Table 6-10) but values in non-descript breed of goat of farmers field flock were found significantly lower in colostrum and milk samples (Condron et al. 2000). These findings might be due to poor nutritional status of non-descript goats as they had low blood level of these trace minerals, therefore the trace minerals levels of colostrum and milk levels were found to be low than the recognized breed under study as they are maintained on the good dietary nutrition (Leeson 2005).
Table 6
Mean±SE values of Zinc (mg/L) in colostrum and milk of various breeds of goats
Groups/Breeds | Colostrum | Milk |
Jamunapari | 11.289 ±0.188a | 4.882 ±0.121b |
Barbari | 11.212 ±0.215a | 4.865 ±0.120b |
Jakharana | 11.215 ±0.216a | 4.845 ±0.104b |
Non-descript | 9.945 ±0.122Aa | 4.143 ±0.060Bb |
Mean with different superscript (A, B) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-b) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 7
Mean±SE values of Copper (mg/L) in colostrum and milk of various breeds of goats
Groups/Breeds | Colostrum | Milk |
Jamunapari | 0.318 ±0.012a | 0.106 ±0.009b |
Barbari | 0.316 ±0.016a | 0.103 ±0.008b |
Jakharana | 0.307 ±0.008a | 0.103 ±0.006b |
Non-descript | 0.252 ±0.013Aa | 0.071 ±0.005Bb |
Mean with different superscript (A, B) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-b) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 8
Mean±SE values of Iron (mg/L) in colostrum and milk of various breeds of goats
Groups/Breeds | Colostrum | Milk |
Jamunapari | 1.76 ±0.05a | 0.35 ±0.01b |
Barbari | 1.72 ±0.04a | 0.34 ±0.01b |
Jakharana | 1.71 ±0.03a | 0.33 ±0.01b |
Non-descript | 1.46 ±0.04Aa | 0.29 ±0.01Bb |
Mean with different superscript (A, B) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-d) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 9
Mean±SE values of Manganese (mg/L) in colostrum and milk of various breeds of goats
Groups/Breeds | Colostrum | Milk |
Jamunapari | 0.261 ±0.008a | 0.113 ±0.003b |
Barbari | 0.262 ±0.008a | 0.114 ±0.003b |
Jakharana | 0.263 ±0.008a | 0.114 ±0.003b |
Non-descript | 0.181 ±0.003Aa | 0.096 ±0.001Bb |
Mean with different superscript (A, B) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-b) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
Table 10
Mean±SE values of Cobalt (µg/L) in colostrum and milk of various breeds of goats
Groups/Breeds | Colostrum | Milk |
Jamunapari | 130.37 ±2.65a | 71.37 ±1.86b |
Barbari | 128.95 ±1.86a | 72.38 ±1.86b |
Jakharana | 128.97 ±1.37a | 72.41 ±1.76b |
Non-descript | 87.02 ±1.71Aa | 52.24 ±1.60Bb |
Mean with different superscript (A, B) in columns are differing significantly in between the groups, otherwise non-significant (p<0.05). |
Mean with different superscript (a-b) in rows are differing significantly in between the intervals, otherwise non-significant (p<0.05). |
It was also observed in the all the breed of goats under study that the colostrum levels of zinc, copper, iron, manganese and cobalt were found to be significantly higher in comparison to the milk samples after four weeks of kidding, showing a decreasing trend from colostrum to milk. Relatively very little work has been done on assessment of trace minerals concentrations in colostrum and milk during the early post-partum period. However, it was reported that the average concentrations of copper, iron, zinc and manganese in colostrum were many fold higher than values for normal milk (Kehoe et al. 2007). It was also observed that no particular trends for the concentrations of copper and iron in colostrum over the first 108 h post-partum; the concentration of zinc was highest in the first milking, but decreased sharply thereafter, while no manganese was detected in colostrum (Jeong et al. 2009). While a general decrease in the levels of copper, iron and zinc level from colostrum to milk had been reported (Abd El Fattah et al. 2012, Quigley and Drewry 1998).
The colostrum immunoglobulin’s (IgG, IgM and IgA) were assessed in the selected goats, revealed a significantly lower values of all the three colostral immunoglobulin’s (IgG, IgM, IgA) in the non-descript breed of goats of the farmers field flocks in comparison to the recognized breeds of goats, however; the values of colostral immunoglobulins (IgG, IgM, IgA) were found to be similar in the recognized breeds of Jamunapari, Barbari and Jakharana of the organized farms (Table 11). The reduction in the values colostral immunoglobulin’s in non-descript goat might be due to fact that they are maintained on a low plane of nutrition than the recognized breed of goats under study. These findings are in agreement with the findings earlier reported that diet plays a significant role in enhancement of immune responses of small ruminants around parturition (Caroprese et al. 2015). Trace minerals deficiencies, may impair colostral transfer of immunoglobulin, which is the might be the reason of decreased immunoglobulin’s in the colostrum of Non-descript goats (Enjalbert et al. 2006).
Table 11
Mean±SE values of immunoglobulins in colostrum of various breeds of goat using quantitative ELISA kits
Parameters | Jamunapari | Barbari | Jakharana | Non-descript |
IgG (mg/ml) | 63.232 ±1.447a | 63.167 ±1.427a | 63.402 ±1.384a | 57.286 ±0.896b |
IgM (µg/ml) | 1931 ±25.704a | 1924.8 ±47.649a | 1941.8 ±34.312a | 1699.2 ±28.523b |
IgA (µg/ml) | 959.8 ±12.677a | 959.4 ±19.846a | 961 ±14.734a | 810 ±13.372b |
Mean with different superscript (a-b) in rows are differing significantly in between the breeds, otherwise non-significant (p<0.05). |
The highest morbidity and mortality was recorded in goat kids born of non-descript breed of goats in first month, second month and third month in comparison to the recognized breeds of goats’ viz. Jamunapari, Barbari and Jakharana (Table 12). Failure of passive transfer of immunity (FPTI) due to poor quality of colostrum viz. reduced levels of colostrum immunoglobulin’s and trace minerals status in present investigation might be the reason for increased morbidity and mortality in goat kids born from non-descript breed of goats. It is very well known fact that neonates of farmed ruminants are agammaglobulinemic at birth and have immature innate and adaptive immune system and to resist infections in early postnatal life, they solely depend on maternal immunoglobulins present in colostrum (Radostits et al. 2007). It is also reported that moderate trace mineral deficiencies are more likely to occur, especially during the transition period, affecting the health of both cows and calves (Linn et al. 2011). The high kid morbidity/mortality is the most significant syndrome affecting the goat rearing and the main losses occurred in the first three months of life. Therefore, efforts should be made to minimize neonatal morbidity/mortality of goat kids to overcome this problem and to make goat rearing more profitable.
Table 12
Percent disease incidence/morbidity and mortality in neonatal goat kids born live from selected goats of various breeds up to weaning
Breed of goats | No of dam | No of kids born live | Percent morbidity (week wise) within 1st month | Percent morbidity (1st month) | Percent morbidity (2nd month) | Percent morbidity (3rd month) | Percent mortality |
1st week | 2nd week | 3rd week | 4th week | 1st month | 2nd month | 3rd month |
Jamunapari | 10 | 13 | 7.69 (1/13) | 15.38 (2/13) | 15.38 (2/13) | 23.08 (3/16) | 38.46 (5/13) | 46.15 (6/13) | 50.00 (6/12) | 00 | 7.69 (1/13) | 8.33 (1/12) |
Barbari | 10 | 16 | 12.5 (2/16) | 31.25 (5/16) | 37.5 (6/16) | 18.75 (3/16) | 62.50 (10/16) | 18.75 (3/16) | 25.00 (4/16) | 00 | 00 | 6.25 (1/16) |
Jakharana | 10 | 17 | 00 | 00 | 11.76 (2/17) | 29.14 (5/17) | 41.17 (7/17) | 29.14 (5/17) | 11.76 (2/17) | 00 | 00 | 00 |
Non-descript | 10 | 15 | 40.00 (6/15) | 53.33 (8/15) | 53.84 (7/13) | 61.54 (8/13) | 100.00 (15/15) | 69.23 (9/13) | 81.81 (9/11) | 13.33 (2/15) | 15.38 (2/13) | 9.09 (1/11) |
It is now a well established fact that pregnant animals undergo some sort of immunosuppressive/ immunotolerant phase during gestation. The main reason behind this is the negative effect of metabolic stress on the immune function, health, and production during this period is well established (Sordillo and Aitken 2009). Metabolic stress starts several weeks before parturition, and therefore can potentially affect the fetus also (Sordillo and Raphael 2013). This may results into various acquired infections due to failure of passive transfer of immunity are considered a major cause of delayed and late postnatal diseases in neonates of farmed ruminants as at birth neonates are agammaglobulinemic and have immature innate and adaptive immune system and to resist infections in early postnatal life, they solely depend on maternal immunoglobulins present in colostrum (Radostits et al. 2007). Failure of passive transfer of immunity (FPTI) due to poor quality or inadequate ingestion of colostrum leads to increased morbidity and mortality in farm animals. Colostrum contains different immune components viz. immunoglobulins, antimicrobial peptides, cytokines, leukocytes and milk oligosaccharides etc. Mechanisms responsible for their synthesis factors regulating them are still poorly understood. This knowledge gap makes it difficult to select nutrient-nutraceutical approach which although has proven immunomodulatory activity to alter the immune quality of colostrum. The trace mineral status of an animal is important during times of stress, especially for transition period because of stress due to fetal growth, colostrums production, as well as other hormonal, physiological, dietary and environmental changes they face (Leeson 2005). Colostrum is the main source of minerals for the neonates; hence mineral content of colostrum is largely affected by mineral supplementation to the dam during the transition period. Therefore, the use of supplemental trace minerals prior to parturition to increase the trace mineral content in fetal tissues and colostrum may help to enhance immunity in the neonates. Trace minerals such as copper, zinc and selenium deficiencies, impaired colostral transfer of immunoglobulin, which is the major reason of decreased resistance of calves, mainly resulting in perinatal mortality and also impair the acquired immunity in older calves (Enjalbert et al. 2006).