東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Intestinal parasites, acorn masts an...

Pedersen, Amy Beth.

Linked to FindBook

Google Book

Amazon

博客來

Intestinal parasites, acorn masts and population dynamics of Peromyscus.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Intestinal parasites, acorn masts and population dynamics of Peromyscus./
Author:	Pedersen, Amy Beth.
Description:	219 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2384.
Contained By:	Dissertation Abstracts International66-05B.
Subject:	Biology, Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3177489
ISBN:	9780542170317

Intestinal parasites, acorn masts and population dynamics of Peromyscus.
Pedersen, Amy Beth.

Intestinal parasites, acorn masts and population dynamics of Peromyscus. - 219 p.

Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2384.

Thesis (Ph.D.)--University of Virginia, 2005.

Understanding the factors contributing to temporal variation in population size is of great ecological interest. While a number of studies have examined the role of predators in causing oscillations in prey abundance, few empirical studies have evaluated the role of parasitism.

ISBN: 9780542170317Subjects--Topical Terms:

1017726
Biology, Ecology.

Intestinal parasites, acorn masts and population dynamics of Peromyscus.
LDR:03503nmm 2200313 4500 001 1825052
005 20061205094420.5
008 130610s2005 eng d
020 $a 9780542170317
035 $a (UnM)AAI3177489
035 $a AAI3177489
040 $a UnM $c UnM
100 1 $a Pedersen, Amy Beth. $3 1914076
245 1 0 $a Intestinal parasites, acorn masts and population dynamics of Peromyscus.
300 $a 219 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2384.
500 $a Adviser: Janis Antonovics.
502 $a Thesis (Ph.D.)--University of Virginia, 2005.
520 $a Understanding the factors contributing to temporal variation in population size is of great ecological interest. While a number of studies have examined the role of predators in causing oscillations in prey abundance, few empirical studies have evaluated the role of parasitism.
520 $a The white-footed mouse (Peromyscus leucopus) and the deer mouse (Peromyscus maniculatus) are ecologically similar species that demonstrate temporal fluctuations in population size. Previous studies suggest that population peaks are due to increased food availability during oak acorn masts. However, resource depletion does not fully explain why populations crash after mast years. One possible explanation is that density dependent transmission of deleterious intestinal pathogens may contribute to post-mast crashes.
520 $a This dissertation examined how intestinal parasites and periodic variation in food availability may regulate natural populations of Peromyscus . I first analyzed long-term data on mouse dynamics, and confirmed acorn mast intensity as the dominant factor contributing to fluctuations in Peromyscus. Predation and abiotic conditions were identified as significant but secondary factors determining mouse abundance, however, a large proportion of the variation in population size remained unexplained. Using a theoretical model I demonstrated that resource depletion alone is insufficient to explain the documented dynamics of Peromyscus populations. Adding a density dependent pathogen to the model provides qualitative agreement with the long-term data. To explore whether the unexplained variation in population dynamics might be a product of host-parasite dynamics, I first tracked the patterns of prevalence and infection intensity of the Peromyscus internal parasite community over three years. Second, I used an antihelminthic drug to remove intestinal nematode and demonstrate that parasite community composition may be structured by within-host competition. Lastly, to test whether population crashes may be influenced by intestinal parasitism, I experimentally manipulated both resource pulses and intestinal nematode infection. I found that the interaction between resource availability and parasitism are likely to contribute to mouse population dynamics, and more specifically the seasonally crashes of Peromyscus.
520 $a In conclusion, I have demonstrated that multiple factors are important for the dynamics of small mammal populations, and that parasitism may interact with resource pulses to contribute to population fluctuations observed in Peromyscus species.
590 $a School code: 0246.
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Biology, Zoology. $3 1018632
690 $a 0329
690 $a 0472
710 2 0 $a University of Virginia. $3 645578
773 0 $t Dissertation Abstracts International $g 66-05B.
790 1 0 $a Antonovics, Janis, $e advisor
790 $a 0246
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3177489