EFFECTS OF BOVINE SOMATOTROPIN ON THE PATTERN OF MILK YIELD WITHIN AND BETWEEN INJECTION INTERVALS IN WEST AFRICAN DWARF GOATS
DOI:
https://doi.org/10.51406/jagse.v10i1.1075Keywords:
WAD goats, milk yield, recombinant bovine somatotropin, Wood’s equation.Abstract
Twenty-four West African Dwarf (WAD) goats were used to study the pattern of milk yield response torecombinant bovine somatotropin (rbST) administered in a sustained-delivery vehicle. The goats weredivided equally into four treatment groups, each comprising of six does. The first group (control, T0)received no rbST while the other groups received rbST (T1, 20 mg; T2, 40 mg; T3, 60 mg) injected at 2-week intervals commencing from the 7th week postpartum for 6 weeks. Pattern of milk yield responseto rbST was significantly (p<0.05) influenced by rbST dose, day from rbST treatment, order of rbSTtreatment and parity. Milk yield of treated goats increased from day 1 of treatment, peaked betweenday 5 and day 8 after treatment and progressively decreased until day 14 of treatment but that of thecontrol decreased progressively from day 1 till day 14 of treatment. The mean relative response ofDMY to rbST treatment for T1, T2 and T3 exceeded T0 by 50.36, 68.00 and 71.16 % respectively andsignificantly affected the shape of the lactation curve, thus, improving persistency of lactation. Thepatterns of DMY for T1, T2 and T3 were well-fitted by the Wood’s equations: Y = 16.628n1.728e-0.439n (R2= 63.1), Y = 25.198n0.836e-0.239n (R2 = 75.6) and Y = 0.008n9.081e-1.352n (R2 = 42.3) respectively. Theadministration of 40 mg dose of rbST appears to elicit DMY response that favoured milk yield persistency.But since highest DMY was observed with 60 mg dose of rbST, estimation of optimal dose thatwould elicit maximum DMY response may be required in order to validate the statement. Our findingssuggest that rbST administration to WAD goats after peak of lactation can enhance milk yield, galactopoiesisand persistency of lactation indicating higher milk yield in extended lactation.References
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F., Pinotti, L., Baraldi-Scesi, L.,
Fantuz, F., Dell`Orto, V. 2002. Bovine
somatoptropin administration to dairy goats
in late lactation: Effects on mammary function,
composition and morphology. J. Dairy
Sci., 85: 1093-1102.
Bauman, D.E. 1992. Bovine somatotropin:
Review of an emerging animal technology. J.
Dairy Sci., 75:3432-3451 (Abstract).
Bauman, D.E., Vernon, R.G. 1993. Effects
of exogenous bovine somatotropin on
lactation. Ann. Review Nutrition, 13: 437-461.
Bemji, M.N., Osinowo, O.A., Ozoje,
M.O., Adebambo, O.A., Aina, A.B.J.
2007. A comparative study on milk yield and
pre-weaning growth of West African Dwarf
and Red Sokoto goats intensively managed
in South-Western Nigeria. Ghanaian J. Anim.
Sci., 2&3(1): 81-88.
Chadio, S.E., Zervas, G., Kiriaku, K.,
Goulas, C., Menegatos, J. 2000. Effects of
recombinant bovine somatotropin administration
to lactating goats. Small Rumin. Res.,
35: 263-269.
Chilliard, Y. 1989. Long-term effects of recombinant
bovine somatotropin (rbST) on
dairy cow performances. Ann. Zootech. (Paris)
37: 159.
Chiofalo, V., Baldi, A., Savoini, G., Polidori,
F., Dell`Orto, V., Politis, I. 1999.
Response of dairy ewes in late lactation to
recombinant bovine somatotropin (rbST).
Small Rumin. Res., 34: 119-125.
Davis, J.J., Sahlu, T., Puchala, R., Herselman,
M.J., Fernadez, J.M., McCann,
J.P., Coleman, S.W. 1999. The effect of
bovine somatotropin on production of lactating
Angora does with kids. J. Anim. Sci.17:17-24.
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J., Ternois, F., Sauvant, D. 1995. Effects
of recombinant bovine somatotropoin on
goats milk yield, composition and plasma
metabolites. Small Rumin. Res., 15: 139-148.
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of somatotropin in growth and lactation
of domestic animals. Physiol. Rev., 78:
745-761.
Fernandez, N., Rodrigues, M., Peris, C.,
Barcelo, M., Moolina, M.P., Torres, A.
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dairy ewes. I. Milk yield and milk composition.
J. Dairy Sci., 78: 1078-1082.
Gallo, L., Bailoni, L., Schiavon, S., Carnier,
P., Ramanzin, M., Andrighetto, I.,
Bittante, G., 1997. Effect of slow-release
somatotropin on the pattern of milk yield
between and within injection intervals. J.
Dairy Sci., 80: 46-51.
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Dairy Sci., 77: 759.
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Agriculture and Agri-Food Canada,
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West African Dwarf, Red Sokoto and Sahel
goats during pregnancy and lactation and their
relationship with partial daily milk yield. M.
Agric. Dissertation. Department of Animal Production
and Health, University of Agriculture,
Abeokuta, Nigeria. Pp. 102.
Jammes, H., Dissenhaus, C., Ouriet, V.,
Kayser, C., Postel-Vinay, M.C., Djiane, J.
1996. Growth hormone-binding protein in the
goat: characterization, evolution under receptor
levels. Domest. Anim. Endocrinol., 13: 477-
489.
Kim, J., Campling, R.C., Wilkinson, J.I.D.
1991. Evaluation of a slow release form of recombinantly
derived bovine somatotropin in
dairy cattle. Anim. Prod., 52: 49.
Peel, C.J. Bauman, D.E. 1987. Somatotropin
and lactation. J. Dairy Sci. 70: 474.
Sallam, S.M.A., Nasser, M.E.A., Yousef,
M.I. 2005. Effect of recombinant bovine
somatotropin administration on milk production,
composition and some haematobiochemical
parameters of lactating goats.
http://net.shams.edu.eg/esap/12005issue/4.pdf
Schams, D., Graf, F., Meyer, J., Graule, B.,
Mauthner, M., Wollny, C. 1991. Changes in
hormones, metabolites and milk after treatment
with sometribove (recombinant methionyl
bST) in Deutsche Fleckvieh and German
Black and White cows. J. Dairy Sci., 69: 1583.
SYSTAT 1992. SYSTAT Computer Package,
Version 5.02 SYSTAT, Inc. 1800 Sherman
Av., Evanston, IL USA, 6021, 708.864.5670.
Wood, P.D.P. 1967. Algebraic model of
lactation curve in cattle. Nature, 216:164-165.
F., Pinotti, L., Baraldi-Scesi, L.,
Fantuz, F., Dell`Orto, V. 2002. Bovine
somatoptropin administration to dairy goats
in late lactation: Effects on mammary function,
composition and morphology. J. Dairy
Sci., 85: 1093-1102.
Bauman, D.E. 1992. Bovine somatotropin:
Review of an emerging animal technology. J.
Dairy Sci., 75:3432-3451 (Abstract).
Bauman, D.E., Vernon, R.G. 1993. Effects
of exogenous bovine somatotropin on
lactation. Ann. Review Nutrition, 13: 437-461.
Bemji, M.N., Osinowo, O.A., Ozoje,
M.O., Adebambo, O.A., Aina, A.B.J.
2007. A comparative study on milk yield and
pre-weaning growth of West African Dwarf
and Red Sokoto goats intensively managed
in South-Western Nigeria. Ghanaian J. Anim.
Sci., 2&3(1): 81-88.
Chadio, S.E., Zervas, G., Kiriaku, K.,
Goulas, C., Menegatos, J. 2000. Effects of
recombinant bovine somatotropin administration
to lactating goats. Small Rumin. Res.,
35: 263-269.
Chilliard, Y. 1989. Long-term effects of recombinant
bovine somatotropin (rbST) on
dairy cow performances. Ann. Zootech. (Paris)
37: 159.
Chiofalo, V., Baldi, A., Savoini, G., Polidori,
F., Dell`Orto, V., Politis, I. 1999.
Response of dairy ewes in late lactation to
recombinant bovine somatotropin (rbST).
Small Rumin. Res., 34: 119-125.
Davis, J.J., Sahlu, T., Puchala, R., Herselman,
M.J., Fernadez, J.M., McCann,
J.P., Coleman, S.W. 1999. The effect of
bovine somatotropin on production of lactating
Angora does with kids. J. Anim. Sci.17:17-24.
Disenhaus, C.H., Jammes, H., Hervieu,
J., Ternois, F., Sauvant, D. 1995. Effects
of recombinant bovine somatotropoin on
goats milk yield, composition and plasma
metabolites. Small Rumin. Res., 15: 139-148.
Etherton, T.D., Bauman, D.E. 1998. Biology
of somatotropin in growth and lactation
of domestic animals. Physiol. Rev., 78:
745-761.
Fernandez, N., Rodrigues, M., Peris, C.,
Barcelo, M., Moolina, M.P., Torres, A.
1995. Bovine somatotropin dose titration in
dairy ewes. I. Milk yield and milk composition.
J. Dairy Sci., 78: 1078-1082.
Gallo, L., Bailoni, L., Schiavon, S., Carnier,
P., Ramanzin, M., Andrighetto, I.,
Bittante, G., 1997. Effect of slow-release
somatotropin on the pattern of milk yield
between and within injection intervals. J.
Dairy Sci., 80: 46-51.
Gallo, L., Cassandro, M., Carnier, P.,
Mantovani, R., Ramanzin, M., Bittante,
G., Tealdo, E., Casson, P. 1994. Modelling
response to slow-releasing somatotropin
administered at 3- or 4-week intervals. J.
Dairy Sci., 77: 759.
Google Earth, 2006. http://www.google.earth
Hartnell, G.F. 1995. Bovine somatotropin:
Production, management, and United States
experience. In: Animal Research and Development:
moving towards a new century, edited by
M. Evan, Centre for Food and Animal Research,
Agriculture and Agri-Food Canada,
Ottawa, ONK1A OC6, Canada. Pp. 189-
203.
James, I.J. 2000. Changes in udder traits of
West African Dwarf, Red Sokoto and Sahel
goats during pregnancy and lactation and their
relationship with partial daily milk yield. M.
Agric. Dissertation. Department of Animal Production
and Health, University of Agriculture,
Abeokuta, Nigeria. Pp. 102.
Jammes, H., Dissenhaus, C., Ouriet, V.,
Kayser, C., Postel-Vinay, M.C., Djiane, J.
1996. Growth hormone-binding protein in the
goat: characterization, evolution under receptor
levels. Domest. Anim. Endocrinol., 13: 477-
489.
Kim, J., Campling, R.C., Wilkinson, J.I.D.
1991. Evaluation of a slow release form of recombinantly
derived bovine somatotropin in
dairy cattle. Anim. Prod., 52: 49.
Peel, C.J. Bauman, D.E. 1987. Somatotropin
and lactation. J. Dairy Sci. 70: 474.
Sallam, S.M.A., Nasser, M.E.A., Yousef,
M.I. 2005. Effect of recombinant bovine
somatotropin administration on milk production,
composition and some haematobiochemical
parameters of lactating goats.
http://net.shams.edu.eg/esap/12005issue/4.pdf
Schams, D., Graf, F., Meyer, J., Graule, B.,
Mauthner, M., Wollny, C. 1991. Changes in
hormones, metabolites and milk after treatment
with sometribove (recombinant methionyl
bST) in Deutsche Fleckvieh and German
Black and White cows. J. Dairy Sci., 69: 1583.
SYSTAT 1992. SYSTAT Computer Package,
Version 5.02 SYSTAT, Inc. 1800 Sherman
Av., Evanston, IL USA, 6021, 708.864.5670.
Wood, P.D.P. 1967. Algebraic model of
lactation curve in cattle. Nature, 216:164-165.
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