Summary
The calcium ingestion of Malabar Giant Squirrels Ratufa indica (Sciuridae) was examined at two sites, Magod and Bhimashankar, in western India. In females at Magod a positive correlation was found between rates of calcium ingestion from food resources and the contribution of those resources to the daily diet. This relationship was true for all females at Magod irre-spective of their reproductive condition. This relationship was neither significant for males at the same site nor for both sexes at Bhimashankar. A differential requirement for calcium between the sexes and the occurrence of higher rates of calcium ingestion or the probable presence of more easily digestible calcium at Bhimashankar are postulated to explain the observed phenomenon. Mature leaves and bark appear to be reliable sources of calcium at these sites.
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References
Altmann J (1974) Observational study of behavior: sampling methods. Behaviour 49:227–267
Ankney CD, Scott DM (1980) Changes in nutrient reserves and diet of breeding brown-headed cowbirds. Auk 97:684–696
Baranga D (1983) Changes in chemical composition of food parts in the diet of colobus monkeys. Ecology 64:668–673
Beasom SL, Pattee OH (1978) Utilization of snails by Rio Grande turkey hens. J Wildl Mgmt 42:916–919
Belovsky GE (1978) Diet optimization in a generalist herbivore: the moose. Theoret Pop Biol 14:105–134
Belovsky GE, Jordan PA (1981) Sodium dynamics and adaptations of a moose population. J Mammal 62:613–621
Biddulph O (1959) Translocation of inorganic solutes. In: Steward FC (ed) Plant Physiology, vol 2, Plants in relation to water and solutes. Academic Press, New York, London, pp 553–603
Borges RM (1989) Resource heterogeneity and the foraging ecology of the Malabar Giant Squirrel Ratufa indica. Ph.D. diss, University of Miami, USA
Brommage R, DeLuca HF (1984) Self-selection of a high calcium diet by vitamin D deficient lactating rats increases food consumption and milk production. J Nutrition 114:1377–1385
Classen HL, Scott TA (1982) Self-selection of calcium during the rearing and early laying periods of white leghorn pullets. Poultry Sci 61:2065–2074
Denton D, McKinley M, Nelson J, Weisinger R (1977) The hormonal genesis of mineral appetites. Acta Endocrinol 85(S212):3–4
Ernst W (1975) Variation in the mineral contents of leaves of trees in miombo woodland in South Central Africa. J Ecol 63:801–807
Freeland WJ, Janzen DH (1974) Strategies in herbivory by mammals: The role of plant secondary compounds. Am Nat 108:269–289
Glander KE (1981) Feeding patterns in mantled howling monkeys. In: Kamil AC, Sargent TD (eds) Foraging behavior: ecological, ethological, and psychological approaches. Garland STPM Press, New York
Golley FB, Yantko J, Richardson T, Klinge H (1980a) Biogeochemistry of tropical forests: 1. The frequency distribution and mean concentration of selected elements in a forest near Manaus, Brazil. Trop Ecol 21:59–70
Golley FB, Yantko J, Jordan C (1980b) Biogeochemistry of tropical forests: 2. The frequency distribution and mean concentration of selected elements near San Carlos de Rio Negro Venezucla. Trop Ecol 21:71–80
Hughes BO, Dewar WA (1971) A specific appetite for zine in zinc-depleted domestic fowls. Br Poultry Sci 12:255–258
Hughes BO, Wood-Gush DGM (1971) A specific appetite for calcium in domestic chickens. Anim Behav 19:490–499
Jones PJ (1976) The utilization of calcareous grit by laying Quelea quelea. Ibis 118:575–576
Jordan CF (1985) Nutrient cycling in tropical forest ecosystems. John Wiley and Sons, New York
Joshua JG, Mueller WJ (1979) The development of a specific appetite for calcium in growing broiler chicks. Br Poultry Sci 20:481–490
Larcher W (1980) Physiological plant ecology. 2nd edition. Springer, Berlin, Heidelberg, New York
Lobaugh B, Joshua IG, Mueller WJ (1981) Regulation of calcium appetite in broiler chickens. J Nutrition 111:298–306
MacLean SF Jr. (1974) Lemming bones as a source of calcium for Arctic sandpipers (Calidris spp.). Ibis 116:552–557
Maynard AB, Loosli JK (1969) Animal nutrition. McGraw-Hill, New York
McDermott MT, Kidd GS (1987) The role of calcitonin in the development and treatment of osteoporosis. Endocr Rev 8:377–390
McKey DB, Gartlan JS, Waterman PG, Choo GM (1981) Food selection by black colobus monkeys (Colobus satanus) in relation to plant chemistry. Biol J Linn Soc 16:115–146
Menzel CM, Carseldine ML, Simpson DR (1987) The effect of leaf age on nutrient composition of non-fruiting litchi (Litchi chinensis Sonn.). J Hortic Soc 62:273–279
Milton K (1979) Factors influencing leaf choice by howler monkeys. A test of some hypotheses of food selection by generalist herbivores. Am Nat 114:362–378
Nelson MM, Evans HM (1961) Dietary requirements for lactation in the rat and other laboratory animals. In: Kon SK, Cowie AT (eds) Milk: the mammary gland and its secretion, vol 2. Academic Press, New York, pp 137–191
Oates JF, Swain T, Zantovska J (1977) Secondary compounds and food selection by colobus monkeys. Biochem Syst Ecol 5:317–321
Pyke GH (1984) Optimal foraging theory: a critical review. Ann Rev Ecol Syst 15:523–575
Richter CP (1936) Increased salt appetite in adrenalectomised rats. Am J Physiol 115:155
Robbins CT (1983) Wildlife feeding and nutrition. Academic Press, New York and London
Rodgers WL (1967) Specificity of specific hungers. J Comp Physiol Psychol 64:49–58
Rosenthal GA, Janzen DH (eds) (1979) Herbivores. Their interaction with secondary plant metabolites. Academic Press, New York and London
Rubin RP (1985) Historical and biological aspects of calcium action. In: Rubin RP, Weiss GB, Putney JW Jr. (eds) Calcium in biological systems. Plenum Press, New York, pp 5–11
Scott EM, Verney EL, Morissey PD (1950) Self selection of diet. XI. Appetites for calcium, magnesium and potassium. J Nutrition 41:187–201
Siegel S (1956) Nonparametric statistics for the behavioral sciences. McGraw-Hill, New York
Smith CC (1977) Feeding behaviour and social organization in howling monkeys. In: Clutton-Brock TH (ed) Primate ecology: studies of feeding and ranging behaviour in lemurs, monkeys and apes. Academic Press, London, pp 97–126
Stephens DW, Krebs JR (1986) Foraging theory. Monographs in behavior and ecology. Princeton University Press, New Jersey
Tiegs RD, Brody JJ, Wahner HW, Barta J, Riggs BL, Heath H, III (1985) Calcitonin secretion in postmenopausal osteoporosis. NE J Med 312:1097–1100
Tolsma DJ, Ernst WHO, Vermeij RA, Vooijs R (1987) Seasonal variation of nutrient concentrations in a semi-arid savanna eco-system in Botswana. J Ecol 75:755–770
Vaughan TA, Czaplewski NJ (1985) Reproduction in Stephens' Woodrat: the wages of folivory. J Mammal 66:429–443
Westoby M (1978) What are the biological bases of varied diets? Am Nat 112:627–631
Woodside B, Millelire L (1987) Self-selection of calcium during pregnancy and lactation in rats. Physiol Behav 39:291–295
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Borges, R.M. Sexual and site differences in calcium consumption by the Malabar Giant Squirrel Ratufa indica . Oecologia 85, 80–86 (1990). https://doi.org/10.1007/BF00317346
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DOI: https://doi.org/10.1007/BF00317346