What Works in Conservation 2020
| , , ,2. Bat conservation
2.8 Threat: Invasive or problematic species and disease
Texte intégral
2.8.1 Invasive species
Likely to be beneficial
Control invasive predators
1One study evaluated the effects of controlling invasive predators on bat populations. The study was in New Zealand.
2COMMUNITY RESPONSE (0 STUDIES)
3POPULATION RESPONSE (1 STUDY)
4Survival (1 study): One replicated, before-and-after study in New Zealand found that controlling ship rats resulted in increased survival probabilities for female long-tailed bats.
5BEHAVIOUR (0 STUDIES)
6Assessment: likely to be beneficial (effectiveness 80 %; certainty 40 %; harms 0 %).
7https://www.conservationevidence.com/actions/1007
Unknown effectiveness
Control invasive plant species
8One study evaluated the effects of controlling invasive plant species on bat populations. The study was in the USA.
9COMMUNITY RESPONSE (0 STUDIES)
10POPULATION RESPONSE (1 STUDY)
11Abundance (1 study): One site comparison study in the USA found that two of seven forest fragments where invasive plant species had been removed alongside other restoration practices had significantly higher bat activity (relative abundance) than two unrestored forest fragments.
12BEHAVIOUR (0 STUDIES)
13Assessment: unknown effectiveness (effectiveness 20 %; certainty 10 %; harms 0 %).
14https://www.conservationevidence.com/actions/1008
No evidence found (no assessment)
15We have captured no evidence for the following interventions:
- Control harmful invasive bat prey species
- Control invasive non-predatory competitors
- Exclude domestic and feral cats from bat roosts and roost entrances
- Keep domestic cats indoors at night
- Use collar-mounted devices on cats to reduce predation of bats.
2.8.2 White-nose syndrome
Unknown effectiveness
Modify bat hibernacula environments to increase bat survival
16One study evaluated the effects of modifying hibernacula environments to increase bat survival. The study was in the USA.
17COMMUNITY RESPONSE (0 STUDIES)
18POPULATION RESPONSE (1 STUDY)
19Survival (1 study): One randomized, replicated, controlled study in the USA found that a greater number of little brown bats infected with the white-nose syndrome fungus survived in hibernation chambers at 4°C than at 10° BEHAVIOUR (1 STUDY)
20Behaviour change (1 study): One randomized, replicated, controlled study in the USA found that little brown bats infected with the white-nose syndrome fungus stayed in hibernation for longer in hibernation chambers at 4°C than at 10°.
21Assessment: unknown effectiveness (effectiveness 50 %; certainty 30 %; harms 10 %).
22https://www.conservationevidence.com/actions/1013
Treat bats for infection with white-nose syndrome
23One study evaluated the effects of treating bats with a probiotic bacterium to reduce white-nose syndrome infection. The study was in Canada.
24COMMUNITY RESPONSE (0 STUDIES)
25POPULATION RESPONSE (1 STUDY)
26Survival (1 study): One randomized, replicated, controlled study in Canada found that treating little brown bats with a probiotic bacterium at the time of infection with white-nose syndrome increased survival, but treating bats 21 days prior to infection had no effect.
27Condition (1 study): One randomized, replicated, controlled study in Canada found that treating little brown bats with a probiotic bacterium at the time of infection with white-nose syndrome reduced the symptoms of the disease, but treating bats 21 days prior to infection made symptoms worse.
28BEHAVIOUR (0 STUDIES)
29Assessment: unknown effectiveness (effectiveness 30 %; certainty 25 %; harms 10 %).
30https://www.conservationevidence.com/actions/2008
No evidence found (no assessment)
31We have captured no evidence for the following interventions:
- Breed bats in captivity to supplement wild populations affected by white-nose syndrome
- Cull infected bats
- Decontaminate clothing and equipment after entering caves
- Restrict human access to bat caves to prevent spread of disease
- Treat bat hibernacula environments to reduce pathogen reservoir
- Vaccinate bats against the white-nose syndrome pathogen.
2.8.3 Disease
No evidence found (no assessment)
32We have captured no evidence for the following interventions:
- Carry out surveillance of bats for early treatment/action to reduce disease/viruses.
2.8.4 Problematic native species
No evidence found (no assessment)
33We have captured no evidence for the following interventions:
- Modify bats roosts to reduce negative impacts of one bat species on another
- Protect bats within roosts from disturbance or predation by native species.
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