ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Use of predator odors as repellents to reduce feeding damage by herbivores (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 379-389 
    Details
    ISSN: 1573-1561
    Keywords: Predator odors ; mustelids ; anal-gland compounds ; pocket gopher ; avoidance response ; thietanes ; dithiolanes ; crop protection ; orchard ; kairomones ; 2,5-dihydro-2,4,5-trimethylthiazoline ; fox urine and feces ; Vulpes vulpes, Mustela spp. ; Thomomys talpoides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract This study investigated the influence of the major anal-gland compounds from the stoat (Mustela erminea) and ferret (M. putorius) in generating an avoidance response by northern pocket gophers (Thomomys talpoides) in tree fruit orchards in the Okanagan Valley of British Columbia, Canada. A secondary objective assessed the impact of additional predator odors on gopher avoidance behavior in laboratory bioassays. In field bioassays, a 1: 1 mixture of 2-propylthietane and 3-propyl-1,2-dithiolane, as well as 3,3-dimethyl-1,2-dithiolane, placed in gopher burrows did not reduce the number of gophers colonizing treatment versus control grids in orchard blocks. However, these predator gophers did dramatically alter the distribution of gophers. Significantly more gophers were captured at perimeter than nonperimeter trap stations on treatment versus control grids in two of three orchards. In all orchards, significantly more gophers were captured at perimeter stations after the predator odors had been placed in burrows than prior to the start of the experiment. Gophers clearly avoided 2,5-dihydro-2,4,5-trimethylthiazoline, a component of fox (Vulpes vulpes) feces, but did not avoid 2,2-dimethylthietane from the mink (M. vison) or 3-methyl-3-butenyl methyl sulfide from fox urine in laboratory bioassays. Poor avoidance was also recorded for 3,3-dimethyl-1,2-dithiolane, although this may be due to the state of polymerization of this compound. An improved formulation is required to dispense these semiochemicals in controlled-release devices within orchards and other forest-agricultural areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01022553
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Laboratory Evaluation of Predator Odors for Eliciting an Avoidance Response in Roof Rats (Rattus rattus) (1998)
    Springer
    Journal of chemical ecology 24 (1998), S. 49-66 
    Details
    ISSN: 1573-1561
    Keywords: Laboratory bioassay ; Rattus rattus ; roof rats ; avoidance behavior ; mustelids ; anal-gland compounds ; red fox urine ; feces ; Vulpes vulpes ; mongoose ; Herpestes auropunctatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We evaluated eight synthetic predator odors and mongoose (Herpestes auropunctatus) feces for eliciting avoidance responses and/or reduced feeding by wild captured Hawaiian roof rats (Rattus rattus). In a bioassay arena, we recorded: (1) time until each rat entered the arena, (2) time elapsed until first eating bout, (3) time spent in each half of the arena, (4) number of eating bouts, and (5) consumption. Rats displayed a response to the predator odors in terms of increased elapsed time before initial arena entry and initial eating bout, a lower number of eating bouts, and less food consumption than in the respective control groups. The odor that produced the greatest differences in response relative to the control group was 3,3-dimethyl-1,2-dithiolane [from red fox (Vulpes vulpes) feces and mustelid anal scent gland]. Mongoose fecal odor produced different responses in four of the five variables measured while (E,Z)-2,4,5-trimethyl-Δ3-thiazoIine (red fox feces) and 4-mercapto-4-methylpentan-2-one (red fox urine and feces) odors were different from the control group in three of the five variables measured. These laboratory responses suggest that wild Hawaiian roof rats avoid predator odors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022384728170
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Field Testing Synthetic Predator Odors for Roof Rats (Rattus Rattus) in Hawaiian Macadamia Nut Orchards (1998)
    Springer
    Journal of chemical ecology 24 (1998), S. 603-630 
    Details
    ISSN: 1573-1561
    Keywords: Field bioassay ; macadamia nut orchards ; Macadamia integrifolia ; Hawaii ; roof rats ; Rattus rattus ; 3,3-dimethyl-1,2-dithiolane ; (E,Z)-2,4,5-trimethyl-Δ3-thiazoline ; radio telemetry ; mark–recapture ; populations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Field trials were conducted to determine whether the synthetic predator odors 3,3-dimethyl-l,2-dithiolane (DMDIT) and (E,Z)-2,4,5-tri-methyl-Δ3-thiazoline (TMT) were effective at eliciting a behavioral response in wild roof rats (Rattus rattus). The study site was a Hawaiian macadamia nut (Macadamia integrifotia) orchard with a recent history of roof rat feeding damage. The synthetic predator odors were encapsulated in urethane devices secured to tree branches. Mark-recapture data from live-trapping of rats and radio telemetry location data were used to assess behavioral responses of rats to the predator odors. Mark–recapture data indicated that DMDIT and TMT had no effect on capture numbers, reproduction, or body weight of rats. There was some indication that distribution of captures and number of locations relative to treated trees in TMT areas were less than in controls, but this pattern was not significant. The predator odors had no effect on home range or median distance from center of activity (MDIS) of rats as measured by telemetry. There was a trend of increasing values of MDIS on TMT areas in session 1 but not session 2. Overall we could not detect significant differences or consistent trends in responses of rats to DMDIT or TMT in these field trials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022304917652
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Response of pocket gophers (Thomomys talpoides) to an operational application of synthetic semiochemicals of stoat (Mustela erminea) (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 941-949 
    Details
    ISSN: 1573-1561
    Keywords: Pocket gopher ; avoidance response ; mustelids ; 2-propylthietane ; 3-propyl-1,2-dithiolane ; 3,3-dimethyl-1,2-dithiolane ; anal-gland compounds ; operational application ; Thomomys talpoides ; Mustela spp. ; controlled-release devices
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract This paper reports on laboratory bioassays and a large-scale field trial of synthetic mustelid anal-gland compounds in controlled-release devices designed for operational application to burrow systems of northern pocket gophers (Thomomys talpoides). The field study was conducted in an apple orchard in the Okanagan Valley of British Columbia. In laboratory bioassays, a 1∶1 mixture of 2-propylthietane and 3-propyl-1,2-dithiolane from the stoat (Mustela erminea) and 3,3-dimethyl-1,2-dithiolane from the ferret (M. putorius), dispensed in clay pellets (activated alumina), produced a significant avoidance response by gophers. All resident gophers were permanently removed from 4-ha control and treatment blocks prior to placement of stoat odor in burrows. As indexed by soil mounds, significantly fewer gophers colonized the treatment (40) than the control (68) removal area during a 5.5-month overwinter experiment. There was also a significant difference when comparing the number of mounds between pre-(79) and posttreatment (40) censuses. In addition, most gopher activity tended to occur on the perimeter of the treatment block. Abundance of gophers showed little difference between additional 4-ha control and treatment blocks where gophers had not been removed. The results of this study provide an alternative technique to toxicants for pocket gopher control on forest and agricultural land.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01016502
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...