Abstract/Details

Spatio-temporal ecology and habitat selection of the critically endangered tropical hare (<i>Lepus flavigularis</i>) in Oaxaca, Mexico


2004 2004

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Abstract (summary)

I studied the spatio-temporal ecology, habitat selection, and survival of tropical hares Lepus flavigularis in Oaxaca, Mexico. Home range size and overlap were estimated to insight into tropical hare's mating behavior and social organization. Habitat selection and survival rates were determined to identify key habitat types and cause-specific mortality for conservation actions. I radio-tracked 51 hares in a savanna of the Isthmus of Tehuantepec, from February 2001 to July 2003. Annual home ranges and core areas of adults averaged 0.56 and 0.09 km2, respectively. Seasonal home ranges of adults varied from 0.22 to 1.11 km2 for females, and from 0.24 to 1.66 km2 for males. Seasonal core areas varied from 0.03 to 0.19 km2 for females, and from 0.02 to 0.20 km 2 for males. Juvenile home range varied from 0.07 to 0.49 km 2 for females, and from 0.11 to 2.64 km2 for males. Home range overlap with more than one individual suggests tropical hares show a polygamous mating behavior, and a non-territorial social organization. Hares selected home ranges with relatively more grassy and sparse shrubby habitats and less dense vegetation. Hares rested during daytime, and favored savanna with bushes of Byrsonima crassifolia that probably provided cover from predators. Hares foraged during crepuscular and nocturnal hours, and favored savanna with scattered trees of Crescentia spp. that allowed visual detection of predators. No effects of sex and season on range size or habitat selection were detected. Annual survival for adults was 0.43, and survival during the wet season (0.56) was lower than during the dry season (0.79), particularly for females. Survival of juvenile females was low during the dry (0.06) and wet (0.15) seasons when compared to juvenile males survival (0.35 and 0.48). Predation was the major cause of mortality with 67% of adult and 94% of juvenile deaths. Induced fires and poaching accounted for 20% and 13% of adult deaths, respectively. Preservation of native vegetation structure in savannas is needed for tropical hare conservation.

Indexing (details)


Subject
Ecology;
Zoology
Classification
0329: Ecology
0472: Zoology
Identifier / keyword
Biological sciences; Byrsonima crassifolia; Ecology; Endangered; Habitat selection; Lepus flavigularis; Mexico; Oaxaca; Tropical hare
Title
Spatio-temporal ecology and habitat selection of the critically endangered tropical hare (<i>Lepus flavigularis</i>) in Oaxaca, Mexico
Author
Farias, Veronica
Number of pages
121
Publication year
2004
Degree date
2004
School code
0118
Source
DAI-B 65/11, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
049613227X, 9780496132270
Advisor
Fuller, Todd K.
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3152694
ProQuest document ID
305176590
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305176590
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