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Thermoregulation and performance of British Anglo-Nubian and Saanen goats reared in an intensive system in Trinidad


Anglo-Nubian and Saanen goats were imported into Trinidad and Tobago to form the nucleus of the goat expansion and improvement programme. Thermoregulation and performance of the parent stock and the F1 were evaluated under intensive housing and management. Rectal temperature in the a.m. irrespective of breed or season ranged from 38.5°C to 38.7°C and p.m. ranged from 38.8°C to 39.0°C. After 2 h of exposure outdoors without shade, Saanen parent stock (SAPS) respiration rate (105 br/min) was significantly higher (p < 0.001) than Saanen F1 (SAF1, 76 br/min), Anglo-Nubian parent stock (ANSP, 65 br/min) and Anglo-Nubian F1 (ANF1, 51 br/min). Rectal temperature over the same period showed significant differences (p < 0.042) between SAF1 (39.8°C) and SAPS (39.4°C), and ANF1 (39.4°C); the value for ANSP was 39.7°C. Age at first kidding showed no significant difference (p > 0.05) between breeds or between the parent stock and the F1 generations, ranging from 638 to 686 days. The ANPS were the most prolific of all groups (p < 0.05); the mean for this group was 1.86 ± 0.07 kids/kidding. Saanen F1 was the least prolific among the group, with mean number of kids at 1.23 (±0.11) kids/kidding. Kidding interval showed no significant (p > 0.05) difference between the groups, ranging from 319 to 521 days. It was concluded that the Anglo-Nubian appears to be more suitable than the Saanen for the tropical humid environment in Trinidad as indicated by their thermoregulation, prolificacy and kidding interval.

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  • Baccari, Jr., F., Brasil, L. H. A., Teodoro, S. M., Goncalves, H. C., Wechsler, F. S. and Aguir, I. S., 1997. Thermoregulatory responses of Alpine goats during thermal stress. In Bottcher, R. W. and Hoff, S. J. (eds). Livestock Environment (American Society of Agricultural Engineers. Michigan, USA vol 2), 789–794.

    Google Scholar 

  • Benicio de Souza, B., Danusio de Souza, E., Cezar, M. F., Haus de Souza, W., Sores dos Santos, J. R. and Alves Benicio, T. M., 2008. Superficial temperature and index of tolerance to the heat of goats of different genetic groups in semi-arid. Ciênc. Agrotec. Larvas., 32, 275–280.

    Article  Google Scholar 

  • Betancourt, O. J. G., 1983. Genetic analysis of a crossbreeding experiment using improved dairy goat breeds and native goats in a dry tropical environment (unpublished PhD thesis, University of California Davis).

  • Cunningham, J.G., 1992. Textbook of Veterinary Physiology. (W. B. Saunders Company. Philadelphia, USA).

    Google Scholar 

  • Chukwuka, O. K., Okoli, I. C., Okeudo, N. J., Opara, M. N., Herbert, U., Ogbuewu, and Ekenyem, B. U., 2010. Reproductive potentials of West African sheep and goats: A Review. Research Journal of Veterinary Sciences, 3, 86–100.

    Article  Google Scholar 

  • Daramola, J. O. and Adeloye, A. A., 2009. Physiological adaptation to the humid tropics with special reference to the West African (WAD) goat, Tropical Animal Health and Production, 41, 1005–1016.

    PubMed  Article  CAS  Google Scholar 

  • Darcan, N. and Güney, O., 2008. Alleviation of climatic stress of dairy goats in Mediterranean climate., Small Ruminant Research, 74, 212–215.

    Article  Google Scholar 

  • Hahn, G. L., Mader, T. L. and Eigenberg, R. A., 2003. Perspective on development of thermal indices for animal studies and management. In Lacetera, N., Bernabucci, U., Khalifa, H. H., Ronchi, B. and Nardone, A. (eds). Interaction between climate and animal production. (EAAP Technical Series. 7), 31–44.

  • Harricharan, H., Lauckner, F. B. And Ramlal, H. (1986). Some production parameters of four breeds of goats reared in Trinidad and Tobago. In Rankine, L. B. (ed) Proceedings of the 17th West Indian Agricultural Economics Conference, held at UWI, St. Augustine, Trinidad W. I. (Department of Agricultural Economics and Farm Management. The University of the West Indies), 40–46.

  • Jacque, A., Douglas, V., Davis, F., Bute, R., Harry, E. and Kalloo, M., 1999. Development plan for the small ruminant sub-sector in Trinidad and Tobago. (Government of the Republic of Trinidad and Tobago, Ministry of Agriculture, Land and Marine Resources).

  • Lallo, C. H. O. and Neckles, F. A., 1988. The performance of crossbred goats under zero-grazing conditions. In Proceedings of the Second Annual Seminar on Agricultural Research in Trinidad & Tobago. (NIHERST, POS), Vol. 2, 125–133.

  • Marai, I. F. M., El-Darawany, A. A., Fadiel, A. and Adel-Hafez, M. A. M., 2007. Physiological traits as affected by heat stress in sheep- a review, Small Ruminant Research, 71, 1–12

    Article  Google Scholar 

  • Majid, A.M.; Cartwright, T.C.; Yazman, J.A. and Fitzhugh H.A., 1993. Performance of Five Breeds of Dairy Goats in Southern United States: Reproductive Traits and Maturing Patterns. World Review of Animal Production, 28, 15–23.

    Google Scholar 

  • Oppong, E.N.W., and Yebuah N.M.N., 1981. Some Production Traits of the West African Dwarf Goat, Tropical Animal Health and Production, 13, 208–212.

    PubMed  Article  CAS  Google Scholar 

  • Otega-Jimenez, E., Alexandre, G., Arquet, R., Mahieu, M. and Xande, A., 2005. Preweaning productivity of suckling goats and sheep in Guadeloupe (FWI) under intensive reproductive rate and grazing management, Tropical Animal Health and Production, 37, 151–165.

    Article  Google Scholar 

  • Shkolnik, A., and Choshniak, I., 1985. Physiological responses and productivity of goats. In Yousef, M. K. (ed). Stress Physiology Vol. 2:39–57. (CRC Press, Inc. Boca Raton, Florida. USA).

  • Song, H. B., Jo, I. H. and Sol, H. S., 2006. Reproductive performance of Korean native goats under natural and intensive conditions, Small Ruminant Research, 65, 284–287.

    Article  Google Scholar 

  • Turkon, P. K., Antiri, Y. K. and Baffuor-Awuah, O., 2004. Risk factors for kid mortality in West African Dwarf goats under an intensive management system in Ghana, Tropical Animal Health and Production, 36:353–364.

    Article  Google Scholar 

  • VSN International, 2008. Genstat discovery edition 3. (WWW.VSNI.Co.Uk).

  • Wilson, R. T. and Murayi, T., 1988. Productivity of the small East African goat and its crosses with the Anglo Nubian and the Alpine in Rwanda, Tropical Animal Health and Production, 20, 219–228.

    PubMed  Article  CAS  Google Scholar 

  • Yousef, M. K., 1985. Stress physiology definition and terminology. In Yousef, M. K. (ed). Stress Physiology in Livestock, Vol. 1, 3–7. (CRC Press, Inc. Boca Raton, Florida. USA).

    Google Scholar 

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The authors wish to thank the Animal Production Division Centeno and the Ministry of Agriculture, Land and Marine Resources, Republic of Trinidad and Tobago. Special thanks to Dr. Francis Davis for supporting this collaborative study.

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Correspondence to Cicero H. O. Lallo.

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Lallo, C.H.O., Paul, I. & Bourne, G. Thermoregulation and performance of British Anglo-Nubian and Saanen goats reared in an intensive system in Trinidad. Trop Anim Health Prod 44, 491–496 (2012).

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  • Anglo-Nubian
  • Saanen
  • Adaptability
  • Performance
  • Trinidad
  • Humid tropics