Conservation « Chiroblog

Archive pour le mot-clef ‘Conservation

Bats and men : zoom on the work of Turning Pierline

Sunday 15 January 2012

The lesser horseshoe bat (Rhinolophus hipposideros) was once a widespread species in Europe. However, it has experienced significant downsizing, whose causes are not yet well identified. Among various hypotheses, that of the reduction and fragmentation of habitats of specific species was chosen. A effet, the lesser horseshoe bat is unusual to move along linear landscape elements, such as hedgerows or wood edging. The Landscape connectivity seems to be a major factor in the maintenance of the species.

In this context,My thesis project is, in a first portion, to characterize the functional connectivity of the habitat of lesser horseshoe bat using the graph method landscaped to assess its role in the distribution of the species in Franche-Comte. The second part of the thesis is a study of the spatial genetic structure of colonies that will closely analyze the role of landscape on the spread of genes, and hence the ability of colonies to maintain some genetic mixing.

A terme, these results are intended to predict the impact of changes in landscape connectivity on populations of small horseshoe bats, in the example, establishment of the transport infrastructure.

Pierline (PhD in landscape ecology, University of Franche-Comte)

Looking for the Lesser Horseshoe Bat

Lesser Horseshoe Bat in his lair

Sample collection (guano) for genetic analysis

Innate recognition of water bodies at bats écholocatrices

Monday 13 June 2011

To head, hunt and communicate, most bats use the’echolocation, equivalent to a biosonar. The original function gives them a mental representation which can be regarded as accurate and effective than some forms of vision. However, some situations can sometimes fool the senses especially bats.Stefan Greif and Björn Siemers l’Max Planck Institute for Ornithology (Germany) showed a innate recognition and horizontal smooth surfaces like water bodies among bats écholocatrices. work of the German show misunderstanding of bats faced with wooden or plastic they assimilate to water bodies and on which animals would try to drink. These results are worrying considering the many types of smooth surfaces and horizontal in our environment, such as windows and solar panels.

Drinking bat.

A Grand Murin, Myotis myotis, surprised in its approach to a body of water to drink Photo ©: Dietmar Nill

If you have three minutes…

Yann & Meriadeg

References

Cross, S. et B. M. Siemers. 2010. Innate recognition of water bodies in echolocating bats. Nature Communications, two: 10.1038/ncomms1110

The economic importance of bats to agriculture

Wednesday 20 April 2011

According to a study published in the journal Science, “the disappearance of bats would cost 3,7 billion to U.S. farmers”. To go further, an article in French the cur-site environment. com or the publication originale English !

Yann

Operation “shelters for bats”

Tuesday 12 April 2011

The project launched by the Group inferred from mammal Breton in 2006 now enjoys the support of the SFEPM that the declines at the national level. Reminder, this operation is a system conventionnement between owners (private or community), that protects bats already present or promote their installation.
It can support and enhance the commitment of bats, especially in built-up areas or residential gardens. While it can be implemented in exceptional, it is intended to reach the general public so broadly. Financing of the French state will allow the production and dissemination of communication tools (Technical Guide 32 pages, sticker, PVC planneau & promotional brochure).

Complete information about the website of Shelters for bats !

Dominique & Roman

A classification in perpetual motion !

Tuesday 25 January 2011

The systematic, or scientific classification of species, is to describe the species to be grouped based on different criteria such as morphology, Ecology, echolocation and also the molecular data. One route taken by the discipline, the cladistique (inherited the work of Willy Hennig), based on the idea that shared characters (said derivatives) by several species often comes from relatives. Years 80, with the discovery of polymerase and the invention of PCR, saw the emergence of molecular biology and genetic data to help solve the kinship of Chiroptera. Thus many complexescryptic species (= “hidden”) were revealed, especially in Europe. Globally, of new species are described each year, following revisions of museum collections, a thorough analysis on the ground and also through expeditions to unexplored regions. This job description is critical Species, particularly because of its implications in the field of conservation. With descriptions of new species, species considered common and distributed on a large scale are being separated into several species range decreased. These new species are often considered most vulnerable. The work then consists of biologists studying these species in detail on the ground to define priorities and strategies for conservation. This knowledge of the classification of species is all the more necessary as many threats to these animals. Fragmentation, alteration or destruction of habitats and the processclimate change, are two main factors of’extinction of species.

In 12 years, between the synthesis of Koopman (1993) and that of Simmons (2005), it is more 191 new species have been described for Science, with the counter that is increased from 925 to 1116 cash (Figure 1). To date, over 1232 species of bats are now counted (Simmons comm. pers.).

Figure 1: Evolution of species descriptions in the bat 1993 to 2010.

Yann & Meriadeg

References

Koopman, K. F. 1993. Order Chiroptera. Pp. 137-241 in Wilson, D. E., and D. M. Reeder, eds. Mammal species of the world. A taxonomic and geographic reference, 2nd ed. Smithsonian Institution Press, Washington, DC.

Simmons, N. B. 2005. Order Chiroptera. Pp. 312-529 in Wilson, D. E., and D. M. Reeder, eds. Mammal species of the World. A taxonomic and geographic reference, 3rd edition. Johns Hopkins University Press, Washington.

Publication of the study on the head of 'White-Nose Syndrome' (Geomyces destructans) a France

Monday 4 January 2010

The article demonstrating the presence of Geomyces destructans bats in a European (Myotis myotis) just published online in the journal Emerging Infectious Disease. The article is now available online before it is published in the February issue of 2010.

The article discusses three possible scenarios :

1-The fungus just arrived in Europe and therefore put at risk species of European bats. This implies that conservation measures are in place to limit the spread of the fungus.

2-The fungus is present in Europe long. Since no mass mortality comparable to that observed in the United States has been postponed in European bats, they may be immune to the fungus.

3-The fungus is not the agent causing the death of bats but plays only a role of opportunistic bats already infected with other agents such as viruses or bacteria.

Some data presented in more detail in Article favor scenarios 2 and 3. However, a comparison of pathogens in bats European and U.S. infected with the fungus is necessary to clearly define the most likely scenario.

For more details, please refer directly to the article available here.

Seb.

The fungus of ' White-Nose Syndrome’ (Geomyces destructans) discovered in Europe

Tuesday 8 December 2009

Following our Article from March 2009 in which we suspected the presence in France of the fungus associated with White Nose Syndrome (WNS), we have taken samples and conducted laboratory studies. The results will be published shortly in the journal Emerging Infectious Diseases clearly confirm the presence of the fungus Geomyces destructans in a European species, Myotis myotis. This is the first study to demonstrate the fungus outside the Northeast U.S.. She discusses the implications of this discovery and the need to study the fungus was Europe. A new section giving more details on this study will be posted on this site upon publication of the original article in Emerging Infectious Diseases.

Duvet blanc sur le museau d'une <i>Myotis myotis</i>, du à l'infection par le champignon parasite <i>Geomyces destructans</i>.

White down on the muzzle of a large Murin, attributed to the destructive fungus géomyce.

Other items related to WNS posted during the year on the same site :

WNS a France ?

Geo-location of suspected cases of White Nose Syndrome

Practical information on WNS and site visits to wintering bats

Suspicion of an outbreak of white nose syndrome in France, guidance for sampling

Noninvasive sampling protocol on bat

If you observe suspected WNS or want more information on WNS, feel free to post a comment or contact us directly by email if urgent.

Seb.

Red List of endangered species in France-2009

Thursday 19 March 2009

The red list of endangered species in France has just been published and shows that 11 mammal species on 119 assessed are threatened with extinction of the metropolitan. On 34 cash of bats present in the area, one is classified as critically endangered (CR; Rhinolophus mehelyi), three vulnerable (VU; Miniopterus schreibersii, Myotis capaccini & Myotis punicus), seven near-threatened (NT; Rhinolophus ferrumequinum, Rhinolophus euryale, Myotis bechsteinii, Myotis blythii, Nyctalus noctula, Nyctalus leisleri, Pipistrellus nathusii) and 18 minor concern in (LC; see list on press release), 4 insufficient data in (DD; Myotis escalerai, Nyctalus lasiopterus, Plecotus macrobullaris & Bat murinus) and finally, a species was not evaluated because a species considered in this metropolis of marginal or occasional (IN; Myotis dasycneme).

Seb.