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A reanalysis of apparent survival rates of Indiana myotis (Myotis sodalis)

100%

Boyles J. G., Walters B. L., Whitaker,Jr. J. O., Cope J. B.

Acta Chiropterologica

2007

tom 09

nr 1

The estimation of demographic rates is important for conservation and management of species. However, with the exception of an estimate for adult survival by Humphrey and Cope in 1977, there are no estimates of any demographic rates for the endangered Indiana myotis (Myotis sodalis). Their estimate is based on techniques that have been replaced by newer, more flexible, and less biased techniques. Therefore, we reanalyzed a subset of the data first analyzed by Humphrey and Cope using a Cormack-Jolly-Seber model. Two models [φ(year)p(year) and φ(year)p(sex*year)] are equally parsimonious, so we used model averaging to estimate apparent survival. We used this estimate to calculate the average cumulative survival each year after banding for four un-aged cohorts. Our estimate suggests that apparent survival is considerably higher than estimated by Humphrey and Cope the first year after banding and lower the second year after banding. Subsequent to the first two years after banding, our estimates are similar, but slightly lower than those reported by Humphrey and Cope. These results, while useful, cannot be taken as true survival rates for Indiana myotis because of limitations in the data and we suggest this estimate be used appropriately when making management decisions. We discuss limitations in this type of data and make suggestions for experimental design of future studies to collect data more appropriate for estimation of demographic rates in bats.

Ecological niche modeling of invasive plant species according to invasion status and management needs: the case of Chromolaena odorata (Asteraceae) in South Africa

100%

Suarez-Mota M. E., Ortiz E., Villasenor J. L., Espinosa-Garcia F. J.

Polish Journal of Ecology

2016

tom 64

nr 3

The management of invasive plant species (IPS) requires knowledge of areas susceptible to invasion and the origin of the invasive biotypes. Ecological niche models (ENMs) are useful for these purposes, but modeling results depend on the data sources. We propose a synthetic approach to determine the selection of data source areas considering the invasion status of an IPS and management objectives to deal with the IPS. We assessed the importance of data source for ENMs and their projections to invasive areas using Chromolaena odorata, a Neotropical weed, in South Africa where this IPS is invading. We used MaxEnt to perform ENMs using different datasets from C. odorata's native range and from South Africa. We employed reciprocal ENM projections to find the probable native region of the plants invading South Africa. ENMs varied depending on the native area selected as the hypothetical invasion source. The modeling approach using worldwide data was most appropriate for prevention purposes, whereas the modelling approach using data from the Americas was most suitable for estimating invasion-susceptible areas in South Africa. The South African ENM was useful for reciprocal modelling but not for prediction of areas susceptible to invasion. ENM projections from the Americas to South Africa and vice-versa identified two native areas as possible invasion sources (northern Mexico and southern tropical South America). Their concordance with the South African ENM can be useful to search for natural enemies of C. odorata's and to reinforce the identification of invasion-susceptible areas in South Africa. We suggest that the various ENM obtained with the synthetic approach in modeling with different data sources for C. odorata cover the scenarios that depend on management purpose and invasion status for this weed.

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A tale of conquest and crisis: invasion history and status of the American mink (Neovison vison) in Iceland

80%

Stefansson R. A., von Schmalensee M., Skorupski J.

Acta Biologica

2016

tom 23

Ograniczanie wyników

1 Acta Biologica

1 Acta Chiropterologica

1 Polish Journal of Ecology

1 Boyles J. G.

1 Cope J. B.

1 Espinosa-Garcia F. J.

1 Ortiz E.

1 Skorupski J.

1 Stefansson R. A.

1 Suarez-Mota M. E.

1 Villasenor J. L.

1 Walters B. L.

1 Whitaker,Jr. J. O.

1 von Schmalensee M.

2 2016

1 2007

Wyniki wyszukiwania

A reanalysis of apparent survival rates of Indiana myotis (Myotis sodalis)

Ecological niche modeling of invasive plant species according to invasion status and management needs: the case of Chromolaena odorata (Asteraceae) in South Africa

A tale of conquest and crisis: invasion history and status of the American mink (Neovison vison) in Iceland