About: The impact of a pathogenic bacterium on a social carnivore population

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: The impact of a pathogenic bacterium on a social carnivore population Goto Sponge NotDistinct Permalink

An Entity of Type : schema:ScholarlyArticle, within Data Space : wasabi.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	The impact of a pathogenic bacterium on a social carnivore population
Creator	Hofer, Heribert Thierer, Dagmar Wachter, Bettina East, Marion Goller, Katja Mü Ller, Thomas Fyumagwa, Robert Hö Ner, Oliver Runyoro, Victor
source	Medline; PMC
abstract	1. The long‐term ecological impact of pathogens on group‐living, large mammal populations is largely unknown. We evaluated the impact of a pathogenic bacterium, Streptococcus equi ruminatorum, and other key ecological factors on the dynamics of the spotted hyena Crocuta crocuta population in the Ngorongoro Crater, Tanzania. 2. We compared key demographic parameters during two years when external signs of bacterial infection were prevalent (‘outbreak’) and periods of five years before and after the outbreak when such signs were absent or rare. We also tested for density dependence and calculated the basic reproductive rate R (0) of the bacterium. 3. During the five pre‐outbreak years, the mean annual hyena mortality rate was 0·088, and annual population growth was relatively high (13·6%). During the outbreak, mortality increased by 78% to a rate of 0·156, resulting in an annual population decline of 4·3%. After the outbreak, population size increased moderately (5·1%) during the first three post‐outbreak years before resuming a growth similar to pre‐outbreak levels (13·9%). We found no evidence that these demographic changes were driven by density dependence or other ecological factors. 4. Most hyenas showed signs of infection when prey abundance in their territory was low. During the outbreak, mortality increased among adult males and yearlings, but not among adult females – the socially dominant group members. These results suggest that infection and mortality were modulated by factors linked to low social status and poor nutrition. During the outbreak, we estimated R (0) for the bacterium to be 2·7, indicating relatively fast transmission. 5. Our results suggest that the short‐term ‘top–down’ impact of S. equi ruminatorum during the outbreak was driven by ‘bottom–up’ effects on nutritionally disadvantaged age–sex classes, whereas the longer‐term post‐outbreak reduction in population growth was caused by poor survival of juveniles during the outbreak and subsequent poor recruitment of breeding females. These results suggest synergistic effects of ‘bottom–up’ and ‘top–down’ processes on host population dynamics.
has issue date	2011-06-01(xsd:dateTime)
bibo:doi	10.1111/j.1365-2656.2011.01873.x
bibo:pmid	21631499
has license	no-cc
sha1sum (hex)	adec032dd047f78fbabdfcd306a838e1918381c2
schema:url	https://doi.org/10.1111/j.1365-2656.2011.01873.x
resource representing a document's title	The impact of a pathogenic bacterium on a social carnivore population
has PubMed Central identifier	PMC7194172
has PubMed identifier	21631499
schema:publication	J Anim Ecol
resource representing a document's body	covid:adec032dd047f78fbabdfcd306a838e1918381c2#body_text
is schema:about of	named entity 'Streptococcus' named entity 'yearlings' named entity 'survival' named entity 'ecological' named entity 'factors' named entity 'large' named entity 'RESULTING IN' named entity 'SURVIVAL' named entity 'COMPARED' named entity 'LIVING' named entity 'PATHOGENIC' named entity 'RECRUITMENT' named entity 'SYNERGISTIC' named entity 'LONG-TERM' named entity 'SHORT-TERM' named entity 'THEIR' named entity 'ANNUAL' named entity 'OUR' named entity 'ABSENT' named entity 'HOST POPULATION' named entity 'TERM' named entity 'FOUND' covid:arg/adec032dd047f78fbabdfcd306a838e1918381c2 named entity 'synergistic effects' named entity 'pathogens' named entity 'prey' named entity 'impact' named entity 'ecological' named entity 'populations' named entity 'density dependence' named entity 'top-down' named entity 'Our' named entity 'dominant' named entity 'density dependence' named entity 'population growth' named entity 'Ngorongoro Crater' named entity 'Crocuta' named entity 'ecological impact' named entity 'key demographic' named entity 'spotted hyena' named entity 'bacterial infection' named entity 'signs of infection' named entity 'carnivore' named entity 'mortality rates' named entity 'Runyoro' named entity 'infection' named entity 'Begon' named entity 'Streptococcus equi' named entity 'rabies' named entity 'pathogens' named entity 'plains zebra' named entity 'adult males' named entity 'Tanzania' named entity 'hyena' named entity 'highly social' named entity 'hyena' named entity 'adult males' named entity 'predation' named entity 'domestic dogs' named entity 'adult males' named entity 'nonvirulent' named entity 'hyena' named entity 'stochastic' named entity 'likelihood ratio test' named entity 'hyena' named entity 'CDV' named entity 'density dependence' named entity 'hyena' named entity 'Streptococcus equi' named entity 'hyena' named entity 'hyena' named entity 'Maasai' named entity 'liver'

Faceted Search & Find service v1.13.91 as of Mar 24 2020

Alternative Linked Data Documents: Sponger | ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3229 as of Jul 10 2020, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (94 GB total memory)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2025 OpenLink Software