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The Physiological Suppressing Factors of Dry Forage Intake and the Cause of Water Intake Following Dry Forage Feeding in Goats - A Review

  • Sunagawa, Katsunori (Faculty of Agriculture, University of the Ryukyus) ;
  • Nagamine, Itsuki (Faculty of Agriculture, University of the Ryukyus)
  • Received : 2015.08.17
  • Accepted : 2015.10.17
  • Published : 2016.02.01

Abstract

The goats raised in the barn are usually fed on fresh grass. As dry forage can be stored for long periods in large amounts, dry forage feeding makes it possible to feed large numbers of goats in barns. This review explains the physiological factors involved in suppressing dry forage intake and the cause of drinking following dry forage feeding. Ruminants consume an enormous amount of dry forage in a short time. Eating rates of dry forage rapidly decreased in the first 40 min of feeding and subsequently declined gradually to low states in the remaining time of the feeding period. Saliva in large-type goats is secreted in large volume during the first hour after the commencement of dry forage feeding. It was elucidated that the marked suppression of dry forage intake during the first hour was caused by a feeding-induced hypovolemia and the loss of $NaHCO_3$ due to excessive salivation during the initial stages of dry forage feeding. On the other hand, it was indicated that the marked decrease in feed intake observed in the second hour of the 2 h feeding period was related to ruminal distension caused by the feed consumed and the copious amount of saliva secreted during dry forage feeding. In addition, results indicate that the marked decreases in dry forage intake after 40 min of feeding are caused by increases in plasma osmolality and subsequent thirst sensations produced by dry forage feeding. After 40 min of the 2 h dry forage feeding period, the feed salt content is absorbed into the rumen and plasma osmolality increases. The combined effects of ruminal distension and increased plasma osmolality accounted for 77.6% of the suppression of dry forage intake 40 min after the start of dry forage feeding. The results indicate that ruminal distension and increased plasma osmolality are the main physiological factors in suppression of dry forage intake in large-type goats. There was very little drinking behavior observed during the first hour of the 2 h feeding period most water consumption occurring in the second hour. The cause of this thirst sensation during the second hour of dry forage feeding period was not hypovolemia brought about by excessive salivation, but rather increases in plasma osmolality due to the ruminal absorption of salt from the consumed feed. This suggests the water intake following dry forage feeding is determined by the level of salt content in the feed.

Keywords

Physiological Controlling Factors;Excessive Salivation;Plasma Osmolality;Dry Forage Intake;Water Intake;Goats

References

  1. Annison, E. F. and D. G. Armstrong. 1970. Volatile fatty acid metabolism and energy supply. In: Physiology of Digestion and Metabolism in Ruminants. Proceeding of the 3rd International Symposium (Ed. A. T. Phillipson). Oriel Press, Newcastle upon Tyne, UK. pp. 422-437.
  2. Anil, M. H., J. N. Mbanya, H. W. Symonds, and J. M. Forbes. 1993. Responses in the voluntary intake of hay or silage by lactating cows to intraruminal infusions of sodium acetate or sodium propionate, the tonicity of rumen fluid or rumen distension. Br. J. Nutr. 69:699-712. https://doi.org/10.1079/BJN19930071
  3. Argenzio, R. 1984. Secretory function of the gastrointestinal tract. In: Dukes' Physiology of Domestic Animals (Ed. M. J. Swenson). Cornell University Press, New York, USA. 292 p.
  4. Bail, C. A. and J. M. Forbes. 1974. Control of feed intake and regulation of energy balance in ruminants. Physiol. Rev. 54:160-214. https://doi.org/10.1152/physrev.1974.54.1.160
  5. Baile, C. A., J. Mayer, and C. L. McLaughlin. 1969. Feeding behavior of goats: Ruminal distension, ingesta dilution, and acetate concentration. Am. J. Physiol. 217:397-402.
  6. Blair-West, J. R. and A. H. Brook. 1969. Circulatory changes and renin secretion in sheep in response to feeding. J. Physiol. 204:15-30.
  7. Campling, R. C. and C. C. Balch. 1961. Factors affecting the voluntary feed intake of the cow. 1. Preliminary observations on the effect, on the voluntary intake of hay, of changes in the amount of the reticulo-ruminal contents. Br. J. Nutr. 15:523- 530. https://doi.org/10.1079/BJN19610065
  8. Ciura, S. and C. W. Bourque. 2006. Transient receptor potential vanilloid 1 is required for intrinsic osmoreception in organum vasculosum lamina terminalis neurons and for normal thirst responses to systemic hyperosmolality. J. Neurosci. 26:9069- 9075. https://doi.org/10.1523/JNEUROSCI.0877-06.2006
  9. Denton, D. A. 1982. The sheep (a ruminant) as a felicitous creature for research in experimental endocrinology and blood fluid regulation: Control of aldosterone secretion. In: The Hunger for Salt (Ed. D. A. Denton). Springer-Verlag. New York, NY, USA. pp. 145-167.
  10. Fitzsimons, J. T. 1979. The physiology of thirst and sodium appetite. Cambridge University Press, Cambridge, UK. 59 p.
  11. Fitzsimons, J. T. 1998. Angiotensin, thirst, and sodium appetite. Physiol. Rev. 78:583-686. https://doi.org/10.1152/physrev.1998.78.3.583
  12. Forbes, J. M. 1995. Ruminant gastrointestinal tract. In: Voluntary food intake and diet selection in farm animals (Ed. J. M. Forbes). CAB International, Wallingford, UK. pp. 58-80.
  13. Grovum, W. L. 1995. Mechanisms explaining the effects of short chain fatty acids on feed intake in ruminants-osmotic pressure, insulin and glucose. In: Ruminant physiology: Digestion, Metablism, Growth and Reproduction. Proceedings of the Eight International Symposium on Ruminant Physiology (Eds. W. V. Engelhardt, S. Leonhard-Marek, G. Breves, and D. Giesecke). Ferdinant Enke Verlag, Stuttgart, Germany. pp. 173-197.
  14. Hidari, H. 1981. The relationships between rumen load and diurnal eating pattern of sheep fed in various time of access to feed. Jpn J. Zootech. Sci. 52:219-226.
  15. Kato, S., Y. Sasaki, and T. Tsuda. 1979. Food intake and rumen osmolality in the sheep. Annales de Recherches Veterinaire 10:229-230.
  16. Leek, B. F. and R. H. Harding. 1975. Sensory nervous receptors in the ruminant stomach and the reflex control of reticulo-ruminal motility. In: Digestion and Metabolism in the Ruminant Stomach (Eds. I. W. McDonald and A. C. I. Warner). University of New England Publishing Unit, Armidale, Australia. pp. 60-76.
  17. Liu, J. R., B. Yu, F. H. Liu, K. J. Cheng, and X. Zhao. 2005. Expression of rumen microbial fibrolytic enzyme genes in probiotic Lactobacillus reuteri. Appl. Environ. Microbiol. 71:6769-6775. https://doi.org/10.1128/AEM.71.11.6769-6775.2005
  18. Mathai, M., M. D. Evered, and M. J. McKinley. 1997. Intracerebroventricular losartan inhibits postprandial drinking in sheep. Am. J. Physiol. 272:R1055-R1059.
  19. McKinley, M. J., M. J. Cairns, D. A. Denton, G. Egan, M. L. Mathai, A. Uschakov, J. D. Wade, R. S. Weisinger, and B. J. Oldfield. 2004. Physiological and pathological influences on thirst. Physiol. Behav. 81:795-803. https://doi.org/10.1016/j.physbeh.2004.04.055
  20. McKinley, M. J., D. A. Denton, S. Hatzikostas, and R. S. Weisinger. 1979. Effect of angiotensin II on parotid saliva secretion in conscious sheep. Am. J. Physiol. 237:E56-E60. https://doi.org/10.1152/ajpcell.1979.237.1.C56
  21. Nagamine, I., K. Sunagawa, J. Kuriwaki, and A. Shinjo. 2003. Chnages in single unit activity in the lateral hypothalamic area of goats during feeding. J. Anim. Sci. 81:529-536. https://doi.org/10.2527/2003.812529x
  22. Oldfield, B. J., E. Bader, D. K. Hards, and M. J. McKinley. 1994. Fos production in retrogradely labelled neurons of the lamina terminalis following intravenous infusion of either hypertonic saline or angiotensin II. Neurosci 60:255-262. https://doi.org/10.1016/0306-4522(94)90219-4
  23. Oshio, S. and I. Tahata. 1984. Absorption of dissociated volatile fatty acids through the rumen wall of sheep. Can. J. Anim. Sci. 64(Suppl.):167-168. https://doi.org/10.4141/cjas84-207
  24. Sasaki, Y., S. Watanabe, Y. Sato, and S. Kato. 1974. Changes in acid-base status of sheep during eating. Jap. J. Zootech. Sci. 45:8-13.
  25. Sasaki, Y., S. Watanabe, Y. Sato, and S. Kato. 1975. Changes in renal excretion of minerals after feeding in sheep. Jap. J. Zootech. Sci. 46:208-212.
  26. Sasaki, Y., S. Watanabe, Y. Sato, and S. Kato. 1975. Effect of intravenous infusion of artificial saliva on changes in acid-base status of sheep during eating. Jap. J. Zootech. Sci. 46:449-453.
  27. Sato, Y. 1975. The relationship between saliva secretion and body fluid balance during feeding in sheep. Ph. D. Thesis, Tohoku University, Sendai, Japan.
  28. Stacy, B. D. and A. C. Warner. 1966. Balances of water and sodium in the rumen during feeding: Osmotic stimulation of sodium absorption in the sheep. Q. J. Exp. Physiol. 51:79-93. https://doi.org/10.1113/expphysiol.1966.sp001843
  29. Stricker, E. M. 1966. Extracellular fluid volume and thirst. Am. J. Physiol. 211:232-238.
  30. Stricker, E. M., K. S. Gannon, and J. C. Smith. 1992. Thirst and salt appetite induced by hypovolemia in rats: analysis of drinking behavior. Physiol. Behav. 51:27-37. https://doi.org/10.1016/0031-9384(92)90200-L
  31. Sunagawa, K., Y. Nakatsu, Y. Nishikubo, T. Ooshiro, K. Naitou, and I. Nagamine. 2002. Effects of intraruminal saliva flow on feed intake in goats fed on alfalfa hay cubes. Asian Australas. J. Anim. Sci. 15:1738-1746. https://doi.org/10.5713/ajas.2002.1738
  32. Sunagawa, K., Y. Nakatsu, Y. Nishikubo, T. Ooshiro, K. Naitou, and I. Nagamine. 2003. Effect of parotid saliva secretion on dry forage intake in goats. Asian Australas. J. Anim. Sci. 16:1118-11125. https://doi.org/10.5713/ajas.2003.1118
  33. Sunagawa, K., T. Hashimoto, M. Izuno, N. Hashizume, M. Okano, I. Nagamine, and T. Hirata. 2008. An intravenous replenishment of salivary components and dry forage intake in freely drinking large-type goats. Asian Australas. J. Anim. Sci. 21:538-546. https://doi.org/10.5713/ajas.2008.70292
  34. Sunagawa, K., T. Ooshiro, N. Nakamura, Y. Ishii, I. Nagamine, and A. Shinjo. 2007. Physiological factors depressing feed intake and saliva secretion in goats fed on dry forage. Asian Australas. J. Anim. Sci. 20:60-69.
  35. Sunagawa, K., R. S. Weisinger, M. J. McKinley, B. S. Purcell, C. Thomson, and P. L. Burns. 2001. The role of angiotensin II in the central regulation of feed intake in sheep. Can. J. Anim. Sci. 81:215-221. https://doi.org/10.4141/A00-055
  36. Thang, T. V., K. Sunagawa, I. Nagamine, and S. Kato. 2010. Deprivation of esophageal boluses and dry forage intake in large-type goats. Asian Australas. J. Anim. Sci. 23:1174-1183. https://doi.org/10.5713/ajas.2010.10027
  37. Thang, T. V., K. Sunagawa, I. Nagamine, S. Kato, and G. Ogura. 2011a. Salivary secretion volume related ruminal distension and suppression of dry forage intake in large-type goats. Asian Australas. J. Anim. Sci. 24:1100-1111. https://doi.org/10.5713/ajas.2011.11001
  38. Thang, T. V., K. Sunagawa, I. Nagamine, and G. Ogura. 2011b. Plasma osmolality controls dry forage intake in large-type goats. Asian Australas. J. Anim. Sci. 24:1069-1085. https://doi.org/10.5713/ajas.2011.11063
  39. Thang, T. V., K. Sunagawa, I. Nagamine, T. Kishi, and G. Ogura. 2012a. The main suppressing factors of dry forage intake in large-type goats. Asian Australas. J. Anim. Sci. 25:341-352. https://doi.org/10.5713/ajas.2011.11228
  40. Thang, T. V., K. Sunagawa, I. Nagamine, T. Kishi, and G. Ogura. 2012b. A physiological stimulating factor of water intake during and after dry forage feeding in large-type goats. Asian Australas. J. Anim. Sci. 25:502-514. https://doi.org/10.5713/ajas.2011.11300
  41. Warner, A. C. I. and B. D. Stacy. 1977. Influence of ruminal and plasma osmotic pressure on salivary secretion in sheep. Q. J. Exp. Physiol. 62:133-142. https://doi.org/10.1113/expphysiol.1977.sp002383