scholarly journals Correction: Multistate matrix population model to assess the contributions and impacts on population abundance of domestic cats in urban areas including owned cats, unowned cats, and cats in shelters

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245633
Author(s):  
D. T. Tyler Flockhart ◽  
Jason B. Coe
Keyword(s):  
Urban Areas ◽  
Population Model ◽  
Population Abundance ◽  
Matrix Population Model ◽  
Domestic Cats

scholarly journals Factors associated with the distribution of natural Toxoplasma gondii infection among equids in Northeastern Brazil

2019 ◽  
Vol 28 (2) ◽  
pp. 283-290 ◽  
Author(s):  
Alexandre Dias Munhoz ◽  
Monia Andrade Souza ◽  
Sonia Carmen Lopo Costa ◽  
Jéssica de Souza Freitas ◽  
Aísla Nascimento da Silva ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Rural Areas ◽  
Urban Areas ◽  
Linear Models ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Northeastern Brazil ◽  
Domestic Cats ◽  
Serum Samples ◽  
Factors Associated

Abstract The aim of this study was to determine the frequency and factors associated with Toxoplasma gondii in naturally infected equids in northeastern Brazil. Serum samples from 569 equids (528 horses, 8 mules and 33 donkeys) were subjected to the indirect fluorescent antibody test. Generalized linear models were used to evaluate associated factors. Among the 569 animals sampled, 118 (30.6%) living in rural areas and 14 (26.42%) in urban areas were seropositive (p>0.05). Seropositive animals were observed on 95% of the farms and in all the municipalities. Donkeys/mules as the host, presence of domestic cats and rats on the farm, ingestion of lagoon water and goat rearing remained in the final model as factors associated with infection. Preventive measures such as avoiding the presence of domestic cats close to rearing areas, pastures and sources of water for the animals should be adopted. The wide-ranging distribution of positive animals also indicated that infection in other domestic animals and in humans, through the contaminated environment, was possible. It should be highlighted that there was the possibility that donkeys and mules would continue to have detectable titers for longer, thus explaining the prevalence found. Further studies are needed to confirm this possibility.

Belled collars reduce catch of domestic cats in New Zealand by half

2010 ◽  
Vol 37 (5) ◽  
pp. 372 ◽  
Author(s):  
J. K. Gordon ◽  
C. Matthaei ◽  
Y. van Heezik
Keyword(s):  
New Zealand ◽  
Urban Areas ◽  
Experimental Studies ◽  
Urban Wildlife ◽  
Control Measures ◽  
Domestic Cats ◽  
The Public ◽  
Negative Impacts ◽  
Catch Rates ◽  
The Uk

Context. As evidence accumulates implicating domestic cats as significant predators of urban wildlife, the need for effective mitigation of potentially negative impacts becomes more pressing. Belled collars are probably one of the cheapest and least intrusive methods, although the opinion of a proportion of members of the public in New Zealand is that they are not effective. Aims. We aimed to determine whether belled collars reduced prey catch. Methods. Prey caught and brought back home by cats that were regular hunters during 6 weeks when they wore a belled collar was compared with prey caught during 6 weeks when they did not wear a collar. Key results. Predation of birds and rodents was reduced by 50% and 61%, respectively. The number of rats, lizards and insects was not significantly reduced; however, these constituted a small proportion of the total catch. Sex and age of cats, as well as time did not affect catch rates, with the exception that older cats were more likely to catch rats (Rattus spp.) than were younger cats. Most of the cats in the study were young, reflecting our selection criteria that cats be regular and frequent hunters. Conclusions. The degree to which catch of birds and rodents was reduced is similar to that reported in two experimental studies in the UK, and confirms that belled collars are effective in the New Zealand environment. Implications. In New Zealand, small mammals are introduced pests and hunters of native wildlife; predation by cats may regulate their populations in urban areas and so care should be taken when instituting cat-control measures. It is also possible that a 50% reduction in predation may be insufficient to ensure viability for some urban wildlife populations.

scholarly journals Polar bear hunt strategies evaluated by a Leslie matrix population model

1983 ◽  
Vol 1 (3) ◽  
pp. 241-247
Author(s):  
Nils Are Øritsland ◽  
Ray Schweinsburg
Keyword(s):  
Population Model ◽  
Polar Bear ◽  
Leslie Matrix ◽  
Matrix Population Model

scholarly journals The genealogical decomposition of a matrix population model with applications to the aggregation of stages

2016 ◽  
Author(s):  
François Bienvenu ◽  
Erol Akçay ◽  
Stéphane Legendre ◽  
David M. McCandlish
Keyword(s):  
Population Model ◽  
Population Biology ◽  
Projection Matrix ◽  
Dominant Eigenvalue ◽  
Matrix Population Model ◽  
Ergodic Markov Chain ◽  
Number Of Classes ◽  
The Relationship ◽  
Asymptotic Growth Rate ◽  
Central Tool

AbstractMatrix projection models are a central tool in many areas of population biology. In most applications, one starts from the projection matrix to quantify the asymptotic growth rate of the population (the dominant eigenvalue), the stable stage distribution, and the reproductive values (the dominant right and left eigenvectors, respectively). Any primitive projection matrix also has an associated ergodic Markov chain that contains information about the genealogy of the population. In this paper, we show that these facts can be used to specify any matrix population model as a triple consisting of the ergodic Markov matrix, the dominant eigenvalue and one of the corresponding eigenvectors. This decomposition of the projection matrix separates properties associated with lineages from those associated with individuals. It also clarifies the relationships between many quantities commonly used to describe such models, including the relationship between eigenvalue sensitivities and elasticities. We illustrate the utility of such a decomposition by introducing a new method for aggregating classes in a matrix population model to produce a simpler model with a smaller number of classes. Unlike the standard method, our method has the advantage of preserving reproductive values and elasticities. It also has conceptually satisfying properties such as commuting with changes of units.

scholarly journals A two-sex matrix population model to represent harem structure

2016 ◽  
Vol 13 (5) ◽  
pp. 1077-1092
Author(s):  
Anthony Tongen ◽  
◽  
María Zubillaga ◽  
Jorge E. Rabinovich ◽  
Keyword(s):  
Population Model ◽  
Matrix Population Model

scholarly journals Gene Frequencies in the Domestic Cats of Adelaide

1973 ◽  
Vol 26 (5) ◽  
pp. 1215 ◽  
Author(s):  
JM Clark
Keyword(s):  
Sex Ratio ◽  
Urban Areas ◽  
Human Population ◽  
Coat Colour ◽  
Domestic Cats ◽  
Gene Frequencies ◽  
Stray Cats

A survey of 600 stray cats from industrial-urban areas of Adelaide was conducted and the frequencies of some genes controlling coat colour were determined. The sample fitted a I : 1 sex ratio and comparison of observed and expected phenotypes at the orange locus established that the population was panmictic. The frequencies for d (0�326) and S (0�295) were significantly different from those in another area in Australia. A possible reason for this difference, based on different human population origins and preferences, is proposed. The frequencies of /, a, W, tb , and 0 did not differ greatly from those in other areas in Australia.

scholarly journals Human-modified landscape acts as refuge for mammals in Atlantic Forest

2018 ◽  
Vol 18 (2) ◽  
Author(s):  
Alex Augusto de Abreu Bovo ◽  
Marcelo Magioli ◽  
Alexandre Reis Percequillo ◽  
Cecilia Kruszynski ◽  
Vinicius Alberici ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Urban Areas ◽  
Puma Concolor ◽  
Conservation Strategies ◽  
Southeastern Brazil ◽  
Forest Fragments ◽  
Domestic Cats ◽  
Mammal Species ◽  
Species List ◽  
Generalist Species

Abstract: Human-modified landscapes (HMLs) are composed by small, isolated and defaunated forest fragments, which are surrounded by agricultural and urban areas. Information on species that thrives in these HMLs is essential to direct conservation strategies in local and regional scales. Since HMLs are dominant in the Atlantic Forest, we aimed to assess the mammalian diversity in a HML in southeastern Brazil and to propose conservation strategies. We collected data of terrestrial (small-, medium- and large-sized) and volant mammals in three small forest fragments (10, 14 and 26 ha) and adjacent areas, between 2003 and 2016, using complementary methods: active search, camera trapping, live-traps, mist nets and occasional records (i.e., roadkills). In addition, we used secondary data to complement our species list. We recorded 35 native mammal species (6 small-sized, 16 medium- and large-sized, and 13 bats) and seven exotic species in the HML. The recorded mammal assemblage (non-volant and volant), although mainly composed of common and generalist species, includes three medium- and large-sized species nationally threatened (Leopardus guttulus, Puma concolor and Puma yagouaroundi) and two data deficient species (Galictis cuja and Histiotus velatus), highlighting the importance of this HML for the maintenance and conservation of mammal populations. Despite highly impacted by anthropogenic disturbances, the study area harbors a significant richness of medium- and large-sized mammals, being an important biodiversity refuge in the region. However, this biodiversity is threatened by the low quality of the habitats, roadkills and abundant populations of domestic cats and dogs. Therefore, we stress the need of conservation strategies focusing on the medium- and large-sized mammals as an umbrella group, which could benefit all biodiversity in the landscape. We recommend actions that promotes biological restoration, aiming to increase structural composition and connectivity of the forest fragments, reducing roadkills and controlling the domestic cats and dogs' populations, in order to maintain and improve the diversity of mammals in long-term.

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