The use of artifical perches to increase predation on house mice (mus domesticus) by raptors

1994 ◽  
Vol 21 (1) ◽  
pp. 95 ◽  
Author(s):  
BJ Kay ◽  
LE Twigg ◽  
TJ Korn ◽  
HI Nicol
Keyword(s):  
Population Density ◽  
Linear Models ◽  
Management Strategies ◽  
Crop Damage ◽  
Birds Of Prey ◽  
House Mice ◽  
Mus Domesticus ◽  
Generalised Linear Models ◽  
Mouse Population ◽  
Over Time

Changes in raptor and mouse abundance over time in response to the introduction of artificial perches for raptors were analysed using generalised linear models. The placement of artificial perches around the perimeter of irrigated soybean crops significantly increased the number of diurnal raptors visiting and hunting over these crops compared with untreated crops. This increased hunting pressure reduced (a) the rate at which the mouse population increased in the crops and (b) the maximum mouse population density. These effects were greater when artificial perches were placed at 100-m spacings rather than 200-m spacings. No significant reductions in mouse damage were detected as mice failed to reach threshold densities for crop damage on the untreated plots. Despite this, the use of artificial perches to attract birds of prey may be a useful addition to rodent management strategies.

The Strategic Use of Rodenticides Against House Mice (Mus Domesticus) Prior to Crop Invasion.

1994 ◽  
Vol 21 (1) ◽  
pp. 11 ◽  
Author(s):  
BJ Kay ◽  
LE Twigg ◽  
HI Nicol
Keyword(s):  
Generalized Linear Models ◽  
Predictive Models ◽  
Linear Models ◽  
Control Strategies ◽  
Crop Damage ◽  
House Mice ◽  
Mus Domesticus ◽  
Short Term ◽  
Over Time

This study evaluated the effect of baiting refuge habitats around irrigated soyabeans with bromadiolone to control house mice and reduce their invasion of crops. Generalized linear models were constructed and used to predict changes in mouse abundance over time in both refuge and crop habitats of treated and untreated plots. Compared with untreated plots, bromadiolone significantly reduced the number of mice inhabiting the refuge habitat and reduced the rate at which mice invaded and colonized the adjacent crops. Despite this, no significant reductions in damage were detected as mice numbers failed to reach critical densities for crop damage on the untreated plots. This indicates a need for short-term predictive models when considering control strategies.

Integral projection models

2021 ◽  
pp. 181-196
Author(s):  
Edgar J. González ◽  
Dylan Z. Childs ◽  
Pedro F. Quintana-Ascencio ◽  
Roberto Salguero-Gómez
Keyword(s):  
Population Dynamics ◽  
Environmental Variables ◽  
Linear Models ◽  
Vital Rates ◽  
Matrix Population Models ◽  
Generalised Linear Models ◽  
Integral Projection Models ◽  
Integral Projection ◽  
Over Time

Integral projection models (IPMs) allow projecting the behaviour of a population over time using information on the vital processes of individuals, their state, and that of the environment they inhabit. As with matrix population models (MPMs), time is treated as a discrete variable, but in IPMs, state and environmental variables are continuous and are related to the vital rates via generalised linear models. Vital rates in turn integrate into the population dynamics in a mechanistic way. This chapter provides a brief description of the logic behind IPMs and their construction, and, because they share many of the analyses developed for MPMs, it only emphasises how perturbation analyses can be performed with respect to different model elements. The chapter exemplifies the construction of a simple and a more complex IPM structure with an animal and a plant case study, respectively. Finally, inverse modelling in IPMs is presented, a method that allows population projection when some vital rates are not observed.

scholarly journals Steep declines in sightings of manta rays and devilrays (Mobulidae) in southern Mozambique

2017 ◽  
Author(s):  
Christoph A. Rohner ◽  
Anna L Flam ◽  
Simon J Pierce ◽  
Andrea D Marshall
Keyword(s):  
Environmental Variables ◽  
Linear Models ◽  
Rapid Decrease ◽  
Vulnerable Species ◽  
High Susceptibility ◽  
Generalised Linear Models ◽  
Population Growth Rates ◽  
Trend Data ◽  
Steep Decline ◽  
Over Time

Mobulid rays are one of the most vulnerable chondrichthyan groups due to their low population growth rates and high susceptibility to fisheries. While estimates of human-induced mortality are lacking, sighting trend data can provide an index of their status. We recorded underwater sightings data of Mobula alfredi, M. birostris and M. kuhlii over a 14-year period in southern Mozambique. Generalised linear models were used to standardise sightings and adjust for influences other than time. Standardised sightings of the three species, individually, declined by >90%. Declines in sightings were driven primarily by a rapid decrease between 2003–2007, although the declines continued to 2016. While environmental variables did influence sightings, they did not explain this steep decline over time. Increasing mortality from fisheries is likely to have played a significant role in the declining sightings of these vulnerable species.

Cost-effectiveness of poison bait trails for control of house mice in mallee cereal crops.

1993 ◽  
Vol 20 (4) ◽  
pp. 445 ◽  
Author(s):  
GJ Mutze
Keyword(s):  
Cost Effectiveness ◽  
Cost Effective ◽  
Moderate Level ◽  
Cereal Crops ◽  
Wheat Crop ◽  
House Mice ◽  
Mus Domesticus ◽  
Population Densities ◽  
Mouse Population ◽  
The Cost

Damage by house mice (Mus domesticus) to a maturing wheat crop was controlled by laying thin trails of poisoned wheat through the crop. Mouse population densities at treatment were about 70 mice ha-1. Mouse numbers were reduced by 100% within 1 week; at harvest, 9 weeks later, mouse numbers were still reduced by 46% relative to 3 untreated crops. That level of mouse control reduced damage to the crop by more than 808, but treatment was barely cost-effective because of the moderate level of damage in untreated crops and the low wheat prices in that year. Treatment is likely to be costeffective given mouse densities of at least 100 mice ha-1 or higher wheat prices, but cost-effectiveness depends greatly on the cost of rodenticide used.

Modelling Income Protection Claim Termination Rates by Cause of Sickness I: Recoveries

2009 ◽  
Vol 4 (2) ◽  
pp. 199-239 ◽  
Author(s):  
S. Y. Ling ◽  
H. R. Waters ◽  
A. D. Wilkie
Keyword(s):  
Linear Models ◽  
Cox Model ◽  
Swine Flu ◽  
Insurance Claims ◽  
Generalised Linear Models ◽  
The Past ◽  
Aggregate Claim ◽  
Over Time

ABSTRACTIn this paper we present methods and results for the estimation and modelling of the recovery intensity for Income Protection (IP) insurance claims, allowing for different causes of claim. We use UK data supplied by the Continuous Mortality Investigation relating to claims paid in the years 1975 to 2002, inclusive. Each claim is classified by one of 70 possible causes according to ICD8.We group causes where appropriate, and then use the Cox model and generalised linear models to model the recovery intensity.In two subsequent papers we complete our modelling of IP claim termination rates by discussing the modelling of the mortality of IP claimants.There are two main reasons why it is useful to incorporate cause of sickness in the modelling of IP claim terminations:(i) The cause of sickness will be known to the insurer for a claim in the course of payment. A reserve can be set more accurately for such a claim if a model of the termination rates appropriate for this cause is available.(ii) Different causes of claim will become more or less significant over time. For example, tuberculosis may have been an important cause of sickness in the past, but is likely to be far less significant now; the swine flu pandemic starting in 2009 is likely to have a significant effect on observed aggregate claim termination rates, skewing them towards higher rates at shorter durations. Information about trends in morbidity, together with a model of termination rates by cause of claim, allows future aggregate claim termination rates to be predicted more accurately, reserves to be set at more appropriate levels and policies to be priced more accurately.One of the covariates included in our models for recovery intensities is Calendar Year. Aggregate recovery intensities have been decreasing over the period considered, 1975 to 2002, and this is generally reflected in the models for recovery intensities by cause of sickness. However, when these intensities are projected for years beyond 2002, the results are not always plausible.

Managing crop damage caused by house mice (Mus domesticus) in Australia

2010 ◽  
Vol 5 (1) ◽  
pp. 2-14 ◽  
Author(s):  
Shahram KABOODVANDPOUR ◽  
Luke K.-P. LEUNG
Keyword(s):  
Crop Damage ◽  
House Mice ◽  
Mus Domesticus

scholarly journals Steep declines in sightings of manta rays and devilrays (Mobulidae) in southern Mozambique

2017 ◽  
Author(s):  
Christoph A. Rohner ◽  
Anna L Flam ◽  
Simon J Pierce ◽  
Andrea D Marshall
Keyword(s):  
Environmental Variables ◽  
Linear Models ◽  
Rapid Decrease ◽  
Vulnerable Species ◽  
High Susceptibility ◽  
Generalised Linear Models ◽  
Population Growth Rates ◽  
Trend Data ◽  
Steep Decline ◽  
Over Time

Mobulid rays are one of the most vulnerable chondrichthyan groups due to their low population growth rates and high susceptibility to fisheries. While estimates of human-induced mortality are lacking, sighting trend data can provide an index of their status. We recorded underwater sightings data of Mobula alfredi, M. birostris and M. kuhlii over a 14-year period in southern Mozambique. Generalised linear models were used to standardise sightings and adjust for influences other than time. Standardised sightings of the three species, individually, declined by >90%. Declines in sightings were driven primarily by a rapid decrease between 2003–2007, although the declines continued to 2016. While environmental variables did influence sightings, they did not explain this steep decline over time. Increasing mortality from fisheries is likely to have played a significant role in the declining sightings of these vulnerable species.

scholarly journals Augmenting the Clinical Data Sources for Enigmatic Diseases: A Cross-Sectional Study of Self-Tracking Data and Clinical Documentation in Endometriosis

2020 ◽  
Vol 11 (05) ◽  
pp. 769-784
Author(s):  
Ipek Ensari ◽  
Adrienne Pichon ◽  
Sharon Lipsky-Gorman ◽  
Suzanne Bakken ◽  
Noémie Elhadad
Keyword(s):  
Additional Data ◽  
Intraclass Correlation ◽  
Management Strategies ◽  
The Self ◽  
Self Management ◽  
Cross Sectional ◽  
Two Samples ◽  
Data Source ◽  
Daily Function ◽  
Over Time

Abstract Background Self-tracking through mobile health technology can augment the electronic health record (EHR) as an additional data source by providing direct patient input. This can be particularly useful in the context of enigmatic diseases and further promote patient engagement. Objectives This study aimed to investigate the additional information that can be gained through direct patient input on poorly understood diseases, beyond what is already documented in the EHR. Methods This was an observational study including two samples with a clinically confirmed endometriosis diagnosis. We analyzed data from 6,925 women with endometriosis using a research app for tracking endometriosis to assess prevalence of self-reported pain problems, between- and within-person variability in pain over time, endometriosis-affected tasks of daily function, and self-management strategies. We analyzed data from 4,389 patients identified through a large metropolitan hospital EHR to compare pain problems with the self-tracking app and to identify unique data elements that can be contributed via patient self-tracking. Results Pelvic pain was the most prevalent problem in the self-tracking sample (57.3%), followed by gastrointestinal-related (55.9%) and lower back (49.2%) pain. Unique problems that were captured by self-tracking included pain in ovaries (43.7%) and uterus (37.2%). Pain experience was highly variable both across and within participants over time. Within-person variation accounted for 58% of the total variance in pain scores, and was large in magnitude, based on the ratio of within- to between-person variability (0.92) and the intraclass correlation (0.42). Work was the most affected daily function task (49%), and there was significant within- and between-person variability in self-management effectiveness. Prevalence rates in the EHR were significantly lower, with abdominal pain being the most prevalent (36.5%). Conclusion For enigmatic diseases, patient self-tracking as an additional data source complementary to EHR can enable learning from the patient to more accurately and comprehensively evaluate patient health history and status.

Potential impacts of poison baiting for introduced house mice on native animals on islands in Jurien Bay, Western Australia

2016 ◽  
Vol 43 (1) ◽  
pp. 61 ◽  
Author(s):  
Clifford Bennison ◽  
J. Anthony Friend ◽  
Timothy Button ◽  
Harriet Mills ◽  
Cathy Lambert ◽  
...  
Keyword(s):  
Western Australia ◽  
Rhodamine B ◽  
Native Species ◽  
House Mice ◽  
Mus Domesticus ◽  
Target Species ◽  
Island Populations ◽  
Delivery Technique ◽  
Poison Baiting ◽  
Competition For Resources

Context House mice (Mus domesticus) are present on Boullanger and Whitlock islands, Western Australia, and could potentially threaten populations of the dibbler (Parantechinus apicalis) and grey-bellied dunnart (Sminthopsis griseoventer) through competition for resources. A workshop in 2007 recommended a study to assess the feasibility of eradicating house mice from the islands by using poison baits and of the risk posed to non-target native species. Aim We aimed to assess the risk to non-target native species if poison baiting was used to eradicate house mice on Boullanger and Whitlock islands. Methods Non-toxic baits containing the bait marker rhodamine B were distributed on Boullanger Island and on the mouse free Escape Island to determine the potential for primary poisoning. Acceptance of baits by mammals was measured through sampling and analysis of whiskers, and by reptiles through observations of dye in faeces. To determine the potential for secondary exposure to poison, the response of dibblers to mouse carcasses was observed using motion-activated cameras. Bait acceptance was compared using two methods of delivery, namely, scattering in the open and delivery in polyvinyl chloride (PVC) tubes. A cafeteria experiment of bait consumption by dibblers was also undertaken using captive animals held at the Perth Zoo. Ten dibblers were offered non-toxic baits containing rhodamine B in addition to their normal meals; consumption of bait and the presence of dye in whiskers were measured. Key results Bait acceptance on the islands was high for house mice (92% of individuals) and dibblers (48%) and it was independent of bait-delivery technique. There was no evidence of bait acceptance by grey-bellied dunnarts. Dibblers may consume mice carcasses if available; however, no direct consumption of mice carcasses was observed with movement sensor cameras but one dibbler was observed removing a mouse carcass and taking it away. During the cafeteria experiment, 9 of 10 captive dibblers consumed baits. Conclusions This investigation demonstrated that dibblers consume baits readily and island populations would experience high mortality if exposed to poison baits. Poison baiting could effectively eradicate mice from Boullanger and Whitlock islands but not without mortality for dibblers. Implications Toxic baits could be used to eradicate mice from Boullanger and Whitlock islands, provided that non-target species such as dibblers were temporarily removed from the islands before the application of baits.

Sign in / Sign up

Export Citation Format

Share Document