The California Ground Squirrel

Hindle, Edward

doi:10.1038/158771b0

Cited by 14 publications

(27 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar development associated with rodent mounds has been noted elsewhere in California (Grinnell & Linsdale 1936, Linsdale 1946 Arenaria-Eriogonum community in that it essentially is a superimposition of low (a few decimeters in height) Artemisia rothrockii shrubs over lag gravel (Fig. Many species common to the lag gravel community are here also: Phlox, Arabis, Calyptridium, etc.…”

Section: Meadowssupporting

confidence: 69%

Microenvironmental Influence on Vegetational Pattern near Timberline in the Central Sierra Nevada

Klikoff¹

1965

Ecological Monographs

View full text Add to dashboard Cite

show abstract

Section: Meadowssupporting

confidence: 69%

Microenvironmental Influence on Vegetational Pattern near Timberline in the Central Sierra Nevada

Klikoff¹

1965

Ecological Monographs

View full text Add to dashboard Cite

show abstract

“…These interconnected burrows might be more likely at high densities. Such a dynamic could explain what appears to be the longest burrow system ever measured for a ground squirrel, a California ground squirrel burrow that totaled 266 m in length, had 33 openings, and was occupied by 6 adult females and 5 adult males (Linsdale 1946). The species is not considered highly social (Armitage 1981;Michener 1983); females are thought to live alone and not share burrow systems with other females or with males, but they can form dense aggregations (:S90/ha- Boellstorff et al 1994).…”

Section: Resultsmentioning

confidence: 99%

Factors influencing burrow length and depth of ground-dwelling squirrels

Vuren

Ordeñana

2012

J Mammal

View full text Add to dashboard Cite

We reviewed the literature on burrows of North American ground-dwelling squirrels to assess factors influencing burrow length and depth. Prior research suggested that soil characteristics and burrow age can influence burrow dimensions; we extended these findings by evaluating the influence of body size, temperature stress, and degree of sociality. We found that body size was positively correlated with burrow length and depth, probably because larger species require more space for underground activities. This relationship did not hold for Marmota monax and M. flaviventris, for unknown reasons. Burrow length scaled allometric ally with body mass (b = 0.72), possibly because the metabolic effects of limited ventilation in burrows placed a constraint on burrow length. Temperature stress was not related to burrow depth, perhaps because of the insulation provided by snow and soil. The more highly social species excavated longer burrow systems, probably because of the greater space needs of multiple residents per burrow.

show abstract

“…High variation in population indices before and after treatment at control sites, and high variation in treatment efficacy between sites suggest that squirrel behaviour may have reduced the sensitivity of our population index. Activity of California ground squirrels varies hourly as well as daily as a result of factors such as stage of the breeding cycle, temperature, presence of predators, and food supply (Linsdale 1946;Stroud 1983). Our index limits the effects of daily variation of behaviour on our index by restricting squirrel counts to the hours when squirrels are most active, and using the mean of the highest of five counts per day from three days.…”

Section: Discussionmentioning

confidence: 99%

“…With our index, we conducted five counts of the number of active squirrels on a plot between 0700 and 0900 hours each day, when squirrels are most active (Linsdale 1946;Fitch 1948), for three consecutive days. The index was calculated as the mean of the highest number of squirrels on each census day.…”

Section: Assessment Of Squirrel Populationsmentioning

confidence: 99%

Comparison of 0.005% and 0.01% diphacinone and chlorophacinone baits for controlling California ground squirrels (Spermophilus beecheyi)

Salmon¹,

Whisson

Berentsen³

et al. 2007

Wildl. Res.

View full text Add to dashboard Cite

Diphacinone and chlorophacinone, first-generation anticoagulant rodenticides, are frequently used for control of California ground squirrels (Spermophilus beecheyi) in agricultural and rangeland areas in California, USA. Owing to growing concerns over the risks to non-target species associated with the use of these rodenticides, the USA Environmental Protection Agency (EPA) proposed that the concentration of baits for above-ground use should be reduced from 0.01% to 0.005% active ingredient. We conducted field trials to compare the efficacy of 0.005% and 0.01% chlorophacinone and diphacinone baits in broadcast and spot applications for control of California ground squirrels on rangeland. We found no significant difference in efficacy owing to bait type, concentration or application method. Repeat testing is needed in other habitat types (e.g. crop areas) where alternative foods might reduce the effectiveness of a 0.005% bait application.

show abstract

The California Ground Squirrel

Cited by 14 publications

References 0 publications

Microenvironmental Influence on Vegetational Pattern near Timberline in the Central Sierra Nevada

Microenvironmental Influence on Vegetational Pattern near Timberline in the Central Sierra Nevada

Factors influencing burrow length and depth of ground-dwelling squirrels

Comparison of 0.005% and 0.01% diphacinone and chlorophacinone baits for controlling California ground squirrels (Spermophilus beecheyi)

Contact Info

Product

Resources

About