A 14-Year Study of Blarina brevicauda Populations in East-Central Illinois

1989 ◽  
Vol 70 (1) ◽  
pp. 58-66 ◽  
Author(s):  
L. L. Getz
Keyword(s):  
Blarina Brevicauda ◽  
East Central ◽  
Central Illinois

Population dynamics of the northern short-tailed shrew, Blarina brevicauda: insights from a 25-year study

2004 ◽  
Vol 82 (11) ◽  
pp. 1679-1686 ◽  
Author(s):  
Lowell L Getz ◽  
Joyce E Hofmann ◽  
Betty McGuire ◽  
Madan K Oli
Keyword(s):  
Survival Rates ◽  
Seasonal Reproduction ◽  
Population Fluctuations ◽  
Population Densities ◽  
Blarina Brevicauda ◽  
East Central ◽  
Annual Peak ◽  
Annual Population ◽  
Central Illinois ◽  
Winter Population

The population demography of the northern short-tailed shrew, Blarina brevicauda (Say, 1823), was studied for 25 years in bluegrass, alfalfa, and tallgrass habitats in east-central Illinois. The population in bluegrass had higher over-winter population density, began increasing earlier in the year, peaked earlier in the year, had higher mean monthly densities and amplitudes of fluctuation, and remained higher for longer than did populations in alfalfa and tallgrass. Survival rates were greater in bluegrass and tallgrass than in alfalfa. The species displayed annual population fluctuations with little variation in amplitude among years in all three habitats. Seasonal reproduction appeared to be responsible for the annual fluctuations. Survival did not vary in relation to season, but was positively correlated with annual peak densities, whereas reproduction was not. There was no correlation between population densities of voles during April–August and annual peak densities of B. brevicauda. We conclude that annual fluctuations in B. brevicauda populations are driven by seasonal reproduction, while variation in mortality, most likely from predation, may explain differences in the amplitudes of annual peaks.

scholarly journals POPULATION ECOLOGY OF THE NORTHERN SLIMY SALAMANDER (PLETHODON GLUTINOSUS) IN EAST-CENTRAL ILLINOIS

2015 ◽  
pp. 17-21
Author(s):  
John A. Crawford ◽  
Andrew R. Kuhns ◽  
Mathys J. Meyer
Keyword(s):  
Population Density ◽  
Population Ecology ◽  
Demographic Data ◽  
Ecosystem Integrity ◽  
East Central ◽  
Plethodon Glutinosus ◽  
Capture Success ◽  
Plethodontid Salamanders ◽  
Management Plans ◽  
Central Illinois

The importance of plethodontid salamanders in forested habitats has been recognized for decades and more recently plethodontids have been touted as a model taxon for monitoring ecosystem integrity and recovery. However, basic demographic data that are crucial to conservation and management plans are currently lacking for many species and regions. The objectives of our study were to characterize the population density, biomass, and capture success of a peripheral population of Plethodon glutinosus to provide a comparison for eastern populations and set a baseline for future monitoring of Midwestern populations. We estimated the population density of P. glutinosus at our site to be 0.41 salamanders/m2, with an estimated biomass of 0.70 g/m2. We did not find any evidence for temperature or precipitation affecting capture success. Our results showed that our density estimate falls within the range of other population ecology studies of Plethodon and sets a baseline for other peripheral Midwestern populations.

Stability of white-tailed doe parturition ranges on a refuge in east-central Illinois

1992 ◽  
Vol 70 (5) ◽  
pp. 968-973 ◽  
Author(s):  
Charles M. Nixon ◽  
Lonnie P. Hansen ◽  
Paul A. Brewer ◽  
James E. Chelsvig
Keyword(s):  
Home Range ◽  
Social Groups ◽  
East Central ◽  
Seasonal Movements ◽  
Bottomland Forests ◽  
Successional Forests ◽  
Core Areas ◽  
Continued Use ◽  
Natal Home ◽  
Central Illinois

Stability and retention of parturition sites were examined for 17 white-tailed does (Odocoileus virginianus) radio-marked on an 800-ha forested area in Piatt County, east-central Illinois. Pre- and post-natal home range sizes were not significantly correlated with density of females, age of doe, litter size (postnatal range only), or sex of litter. As females aged, parturition sites moved closer to prenatal centers of home range activity (P < 0.02), and overlap of both pre- and post-natal home range boundaries increased in consecutive years (P < 0.001). Postnatal core areas of related females evidenced considerable overlap, whereas those of unrelated does were discrete. Breeding does used upland successional forests (< 60 years old) more than expected and bottomland forests less than expected (P < 0.05) as sites for parturition. Through seasonal movements, including migratory and dispersal behaviors, does in east-central Illinois, where forests are scarce, use all available sites suitable for parturition. Selection and retention of these parturition sites promote the development of matriarchal social groups, which ensures continued use of these sites by related females.

Using blends of cerambycid beetle pheromones and host plant volatiles to simultaneously attract a diversity of cerambycid species

2012 ◽  
Vol 42 (6) ◽  
pp. 1050-1059 ◽  
Author(s):  
Lawrence M. Hanks ◽  
Jocelyn G. Millar ◽  
Judith A. Mongold-Diers ◽  
Joseph C.H. Wong ◽  
Linnea R. Meier ◽  
...  
Keyword(s):  
Host Plant ◽  
Native Species ◽  
Plant Volatiles ◽  
Strong Inhibition ◽  
Host Plant Volatiles ◽  
East Central ◽  
Pheromone Components ◽  
Cerambycid Beetles ◽  
Multiple Species ◽  
Central Illinois

We evaluated the attraction of native species of cerambycid beetles to blends of cerambycid pheromones and the host plant volatiles ethanol and α-pinene to determine whether such blends could be effective lures for detecting and monitoring multiple species. The complete six-component blend of pheromones included racemic 3-hydroxy-2-hexanone, 2,3-hexanediol isomers, (E)-6,10-dimethyl-5,9-undecadien-2-ol and the corresponding acetate, 2-(undecyloxy)-ethanol, and racemic 2-methyl-1-butanol. Bioassays in east-central Illinois captured 3070 cerambycid beetles of 10 species, including four species in the subfamily Cerambycinae ( Neoclytus acuminatus (Fabricius, 1775), Neoclytus mucronatus (Fabricius, 1775), Phymatodes lengi Joutel, 1911, and Xylotrechus colonus (Fabricius, 1775)) and six species in the subfamily Laminiae ( Aegomorphus modestus (Gyllenhal in Schoenherr, 1817), Astyleiopus variegatus (Haldeman, 1847), Astylidius parvus (LeConte, 1873), Graphisurus fasciatus (DeGeer, 1775), Lepturges angulatus (LeConte, 1852), and Monochamus carolinensis (Olivier, 1792)). Beetles were attracted to their pheromone components within the blend, with inhibition only evident in one species. Host plant volatiles synergized attraction for some species, and synergism usually was attributed to ethanol, with α-pinene enhancing attraction only for the pine specialist M. carolinensis. The optimal strategy for targeting a broad range of cerambycid species would be to bait traps with a blend of several pheromones plus ethanol and α-pinene because synergism by these plant volatiles is critical for some species, whereas strong inhibition is uncommon.

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