In order to determine the effects of low level lead exposure on gastric motility in raptors, strain gage transducers were surgically implanted on the serosal surface of the muscular stomach of three red-tailed hawks. The frequency and amplitude of gastric contractions during ingestion and early digestion were monitored for 1 week under control conditions and for 3 weeks while the birds were fed 0.82 or 1.64 mg lead (as lead acetate) per kg body weight each day. Exposure to these doses did not appreciably affect either the frequency or amplitude of gastric contractions in these birds. This low level lead exposure also had no consistent effect on the regular egestion of pellets of undigested material by hawks. Daily exposure to doses up to 6.55 mg lead/kg body weight did not affect the frequency or timing of pellet egestion, and exposure to 1.64 mg lead/kg did not affect the gastric contractions associated with pellet egestion. Although gastrointestinal dysfunction is often associated with clinical cases of acute lead toxicity, chronic exposure to these low levels of lead acetate did not significantly alter gastric motility in red-tailed hawks.
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Beyer WN, Spann JW, Sileo L, Franson JC (1988) Lead poisoning in six captive avian species. Arch Environ Contam Toxicol 17:121–130
Cooke SW (1982) Surgical relief of oesophageal impaction in a Whooper Swan. Vet Rec 111:166
Cory-Slechta DA, Garman RH, and Siedman D (1980) Lead-induced crop dysfunction in the pigeon. Toxicol Appl Pharmacol 52:462–467
Duke GE and Kostuch TE (1974) The use of strain gauge transducers to study gastroduodenal motility in turkeys. Poultry Sci 54:1472–1478
Duke GE, Evanson OA, and Jegers A (1976) Meal to pellet intervals in 14 species of captive raptors. Comp Biochem Physiol 53A:1–6
Durham K (1983) Mechanism and regulation of pellet egestion in the red-tailed hawk. Master's thesis, University of Minnesota, St. Paul, MN
Franson JC, Sileo L, Pattee OH and Moore JF (1983) Effects of chronic dietary lead in American kestrels (Falco sparverius). J Wildl Dis 19:110–113
Janssen DL, Oosterhuis JE, Allen JL, Anderson MP, Kelts DG, Wiemeyer SN (1986) Lead poisoning in free-ranging California condors. J Am Vet Med Assoc 189:115–117
Nelson TA, Mitchell C, Abbott C (1989) Lead-shot ingestion by bald eagles in western Arkansas. SW Naturalist 34:245–249
Pattee OH, Wiemeyer SN, Mulhern BM, Sileo L and Carpenter JW (1981) Experimental lead-shot poisoning in bald eagles. J Wildl Manage 45:806–810
Pattee OH and Hennes SK (1983) Bald eagles and waterfowl: The lead shot connection. Trans North Amer Wildl and Nat Resour Conf 48:230–237
Redig PT, Duke GE, and Swanson P (1983) The rehabilitation and release of bald and golden eagles: A review of 245 cases. In: Bird DM (ed)Biology and Management of Bald Eagles and Ospreys. MacDonald Raptor Research Center and Raptor Research Foundation, Inc., St. Anne de Bellevue, Quebec, Canada, pp 137–147
Redig PT, Lawler EM, Schwartz S, Dunnette JD, Stephenson B, and Duke GE (1991) Effects of chronic exposure to sublethal concentrations of lead acetate on heme synthesis and immune function in red-tailed hawks. Arch Environ Contam Toxicol 21:72–77
Reichel WL, Schmeling SK, Cromartie E, Kaiser TE, Krynitsky AJ, Lamont TG, Mulhern BM, Prouty RM, Stafford CJ, and Swineford DM (1984) Pesticide, PCB, and lead residues and necropsy data for bald eagles from 32 states — 1978–81. Environ Monit Assess 4:395–403
Reiser MH and Temple SA (1981) Effects of chronic lead ingestion on birds of prey. In: Cooper JE and Greenwood AG (eds.)Recent Advances in the Study of Raptor Diseases Chiron Publ. Ltd., West Yorkshire, England, pp 21–25
Stendall RC (1980) Dietary exposure of kestrels to lead. J WiidS Manage 44:527–530
Wiemeyer SN, Frenzel RW, Anthony RG, McClelland BR, Knight RL (1989) Environmental contaminants in blood of western bald eagles. J Raptor Res 23:140–146
This research was partially supported by a grant from the Blandin Foundation of Grand Rapids, Minnesota 55744.
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Lawler, E.M., Duke, G.E. & Redig, P.T. Effect of sublethal lead exposure on gastric motility of red-tailed hawks. Arch. Environ. Contam. Toxicol. 21, 78–83 (1991). https://doi.org/10.1007/BF01055560
- Waste Water
- Strain Gage
- Chronic Exposure
- Consistent Effect
- Lead Exposure