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Effects of petroleum on mink applied as a model for reproductive success in sea otters.
J Wildl Dis. 2001 Oct;37(4):686-92
Publication Type
J A Mazet
I A Gardner
D A Jessup
L J Lowenstine
Author Affiliation
Wildlife Health Center, School of Veterinary Medicine, University of California, Davis, California 95616, USA.
J Wildl Dis. 2001 Oct;37(4):686-92
Publication Type
Food Contamination
Maternal Exposure
Models, Animal
Otters - physiology
Petroleum - adverse effects
Pregnancy Outcome - veterinary
Pregnancy, Animal - drug effects - physiology
Prenatal Exposure Delayed Effects
Reproduction - drug effects
Research Support, Non-U.S. Gov't
Water Pollutants, Chemical - adverse effects
Ranch-reared mink (Mustela vison) were used as a model in an experimental trial to investigate the potential effects of exposure to two petroleum products on sea otters (Enhydra lutris). Mink were exposed either dermally on one occasion 60 days prior to breeding or via low level contamination of their diets daily from 60 days prior to breeding (January 1994) until weaning of kits (June 1994). For dermal exposure, we placed mink in either a slick of Alaskan North Slope crude oil (n = 24) or bunker C fuel oil (n = 24) on sea water or sea water alone (n = 10) for 1 min. For dietary exposure, we fed mink rations containing 500 ppm of either Alaskan North Slope crude oil (n = 24) or bunker C fuel oil (n = 24; control, n = 15). The number of liveborn kits did not differ significantly among mink exposed dermally (5.0 kits/female for crude oil and 6.5 kits/female for bunker C fuel oil) and unexposed controls (5.3 kits/female). However, only 2.3 and 0.7 kits were produced per female for those exposed through the diet to crude oil and bunker C fuel oil, respectively. Females with reduced reproductive success had no clinical signs of toxicosis or behavioral abnormalities. In addition, kits of females exposed through the diet had poor survival to weaning. Once mature, kits born to females exposed to bunker C fuel oil in the diet had significantly reduced reproductive success (3.4 kits/female) although their only exposure to the petroleum products was in utero or during nursing. Therefore, it is possible that sea otter populations consuming contaminated food sources or colonizing previously oiled habitats will have reduced reproductive success.
PubMed ID
11763732 View in PubMed
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