Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support

Reproduction of Feral Pigs in Southern Texas

Richard B. Taylor, Eric C. Hellgren, Timothy M. Gabor and Linda M. Ilse
Journal of Mammalogy
Vol. 79, No. 4 (Nov., 1998), pp. 1325-1331
DOI: 10.2307/1383024
Stable URL: http://www.jstor.org/stable/1383024
Page Count: 7
  • Read Online (Free)
  • Download ($42.00)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Reproduction of Feral Pigs in Southern Texas
Preview not available

Abstract

The feral pig (Sus scrofa) is an abundant introduced species with pernicious effects on native species and ecosystems. Its potential reproductive rate is the highest of any ungulate, but data on reproductive rates of feral pigs are limited. We studied reproduction of feral pigs in two regions of southern Texas: the Gulf Coast Prairies and the western South Texas Plains. Pregnancy rates of adults (>21 months) ranged from 78% during winter (December-February) in the Gulf Coast Prairie to 6% in summer (June-August) in the western study area. Fetal litter sizes in adults tended to be greater (P = 0.11) than those of yearlings. Fecundity ranged from 1.1 female young/year for juvenile females to 4.5 female young/year in adult females. Sex ratio of fetuses (n = 298) was male-biased (P < 0.05) when data from both study areas were combined. Two seasonal peaks of births were observed (January-March and June-July). Fecundity of pigs in southern Texas was more than four times higher than native ungulates, raising serious questions about dynamics of the ungulate community in this region.

Page Thumbnails

  • Thumbnail: Page 
1325
    1325
  • Thumbnail: Page 
1326
    1326
  • Thumbnail: Page 
1327
    1327
  • Thumbnail: Page 
1328
    1328
  • Thumbnail: Page 
1329
    1329
  • Thumbnail: Page 
1330
    1330
  • Thumbnail: Page 
1331
    1331