A note on the association of haemoglobin types with ewe and ram fertility and lamb mortality in Indian sheep

Arora, C. L.; Acharya, R. M.; Kakar, S. N.

doi:10.1017/s000335610002986x

Cited by 11 publications

(7 citation statements)

References 7 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The trend was for lamb survival to be higher in lambs born to dams with Hb BB and sired by Hb AB rams and this would be consistent with the results of some workers (King et al 1958) and contrary to others (Obst & Evans 1970;Arora et al 1971;Purser & Hall 1974).…”

Section: Discussionsupporting

confidence: 86%

See 1 more Smart Citation

Identification of factors contributing to the improved lamb survival in Marshall Romney sheep

Knight

Lynch²,

Hall³

et al. 1988

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

In each of three years (1979, 1980, 1981) 260 -280 mixed age Marshall Romney (MR) and 300 -400 mixed age control Romney (CR) ewes were allocated to eight groups with ewes of each strain present in each group. Four groups were single-sire-mated with four MR rams and the other four groups with four CR rams. A new selection of rams was used each year. The haemoglobin type of all ewes and rams was determined. Ewes were weighed 3 -4 weeks before the beginning of lambing and their respective weights adjusted to conceptus-free weights. At lambing, the lambs born to each ewe were identified and birth weight, pelvic width, and head and chest circumferences were measured. Each day dead lambs were picked up and autopsied. In the last 2 years this included looking for cranial and spinal haemorrhages. Lambs present at weaning were weighed and recorded. The conjugate and transverse diameters and area of the pelvic opening were measured on the pelvises of 47 MR and 37 CR ewes after slaughter in 1980 and 1981. The length of gestation was recorded for all ewes in 1980. Lamb survival was 8.5010 higher for lambs born to MR ewes and 5.5% higher for lambs sired by MR rams. The strain of ewe by strain of ram interaction was not significant and the improvement in lamb survival for MR ewes and rams occurred for both single-and twin-born lambs. The improved survival of lambs born to MR ewes was associated with a lower incidence of dystocia (2.3 v. 5.7%) and starvation (2.9 v. 5.1%).The main effect of MR rams was a lower incidence of parturient deaths (0.1 v. 1.0%). Overall incidence of cranial and spinal haemorrhages was 24% and 41 % respectively. Most of the cranial haemorrhages occurred in lambs dying from dystocia (41 %) and hypoxia (33 %) and most of the spinal haemorrhages were found in lambs dying from starvation (41 %) and dystocia (61 %). There was no effect of ewe or ram strain on the occurrence of central nervous system haemorrhages. The conceptus-free pre-lambing liveweight of MR ewes was 56.9 kg compared to 50.4 kg for CR ewes. Despite the large difference in liveweight between the two strains of ewes, the mean birth weight of the lambs was only 0.08 kg heavier for lambs born to MR ewes (4.64 kg) compared with CR ewes (4.56 kg). This small increase in birth weight of lambs born to MR ewes was accompanied by a 0.7 cm (1.9%) increase in chest circumference of the lambs. Lambs sired by MR rams were 0.1 kg lighter than lambs sired by CR rams (4.55 v. 4.65 kg). This was accompanied by a 0.09 cm (1.0%) narrower pelvic width for lambs sired by MR rams. T~ere were quadratic relationships between lamb survival and birth weight, chest circumference, and head circumference, and a linear relationship between lamb survival and pelvic width. MR ewes had pelvic openings with larger conjugate (10.9 v. 10.6 cm) and transverse (9.5 v. 9.0 cm) diameters than CR ewes. The area of the pelvic opening was 8.0;0 larger for MR than CR ewes (104.1 v. 95.3 cm ). There was evidence of improved maternal behaviour of MR ewes compared with CR ew...

show abstract

Section: Discussionsupporting

confidence: 86%

“…Obst & Evans (1970) found the advantage in survival of lambs from ewes with Hb AA occurred early in life and only under wet, cold conditions. Arora et al (1971) found lambs sired by rams with Hb BB had better survival than lambs sired by rams with Hb AB. Walker et al (1979), however, found no effect of ram Hb type on lamb survival.…”

Section: Introductionmentioning

confidence: 92%

Identification of factors contributing to the improved lamb survival in Marshall Romney sheep

Knight

Lynch²,

Hall³

et al. 1988

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

show abstract

“…in HbA ewes than in HbB ewes. Furthermore, the results of Arora et al (1971) and Meyer et al (1967) for sheep grazing non-oestrogenic pastures indicate similar findings.…”

Section: Discussionsupporting

confidence: 64%

Influence of Haemoglobin Type and Selenium Status on Peripheral Plasma Progesterone and Corticosteroid Concentration in Ewes Grazing Oestrogenic Pastures

Walker¹,

Obst²,

Smith³

et al. 1979

Aust. Jnl. Of Bio. Sci.

View full text Add to dashboard Cite

Peripheral plasma progesterone and corticosteroid concentrations were studied in ewes grazing oestrogenic pastures during oestrus, pregnancy and parturition in 1974 and during pregnancy in 1975. Haemoglobin (Hb) type A ewes had significantly higher mean corticosteroid concentrations than HbB ewes in both years. In 1974 the concentration of progesterone did not differ significantly between Hb types whilst in 1975 the concentration was significantly (P < 0·001) higher in HbA ewes.The mean corticosteroid concentrations were higher in selenium-supplemented ewes of both Hb types than in unsupplemented ewes in 1974 but lower in 1975. Selenium treatment did not significantly influence the progesterone concentration in ewes of both Hb types in 1974 but significantly (P< 0'01) increased it in 1975.It is concluded that the higher concentration of plasma corticosteroids or factors regulating the relationship between corticosteroids and progesterone could be responsible for the higher estimates of embryonic mortality reported in HbA ewes.

show abstract

“…Animals with genotype Hb and BB have been reported to have better body weight (Arora et al, 1971). In sheep, with Hb AB and Hb BB genotypes had been observed to have an effect on their performance (Dally et al, 1980;Arora, 1984;Dratch et al, 1986).…”

Section: Introductionmentioning

confidence: 99%

“…The study of haemoglobin polymorphism in fish has become imperative, because of its importance in the improvement of farm animals due to the fact that some polymorphic alleles may be linked with traits of economic importance (Egena and Alao, 2014). Arora et al (1971) reported marginally but not significant better body weight in Hb BB type animals.…”

Section: Introductionmentioning

confidence: 99%

Haemoglobin polymorphism in wild and cultured African catfish (<i>Clarias gariepinus</i> Burchell, 1822)

Diyaware¹,

Ahmed²,

Akinyemi³

et al. 2017

Ife Journal of Science

View full text Add to dashboard Cite

Haemoglobin polymorphism, haemoglobin concentration, blood group and genotypes of wild and cultured Clarias gariepinus were investigated. Blood samples of Clarias gariepinus collected from Lake Alau (wild) and Dalori fish farm (cultured) were subjected to cellulose acetate electrophoresis to reveal the activities of hemoglobin (Hb). The result shows that both wild and cultured C. gariepinus had AA, BB and CC genotypes in the males and females. However, BD genotype was observed only in the female wild C. gariepinus. The percentage AA and BB genotypes of wild male C. gariepinus was 6.6% each. Wild females had AA, BB, CC and BD genotype with frequencies of 26.6, 33.3, 20 and 6.6% respectively. Cultured male C. gariepinus had AA, BB and CC with frequencies of 13.3, 26.6 and 6.6%, respectively, while the female C. gariepinus had AA, BB and CC with frequencies of 20, 13.3 and 20% respectively. Wild C. gariepinus had the highest (10.36 g/dl) haemoglobin

show abstract

A note on the association of haemoglobin types with ewe and ram fertility and lamb mortality in Indian sheep

Cited by 11 publications

References 7 publications

Identification of factors contributing to the improved lamb survival in Marshall Romney sheep

Identification of factors contributing to the improved lamb survival in Marshall Romney sheep

Influence of Haemoglobin Type and Selenium Status on Peripheral Plasma Progesterone and Corticosteroid Concentration in Ewes Grazing Oestrogenic Pastures

Haemoglobin polymorphism in wild and cultured African catfish (<i>Clarias gariepinus</i> Burchell, 1822)

Contact Info

Product

Resources

About