Difference between revisions of "Yoyo River Forest Reserve"
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| − | <div style="float: right">{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap|5.960077, -2.795357~[[Yoyo River Forest Reserve]]~Pan troglodytes verus}}</div> | + | <div style="float: right">{{#display_map: height=190px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap|5.960077, -2.795357~[[Yoyo River Forest Reserve]]~'Pan troglodytes verus''}}</div> |
* Western chimpanzees (''Pan troglodytes verus'') may be present in Yoyo River Forest Reserve. | * Western chimpanzees (''Pan troglodytes verus'') may be present in Yoyo River Forest Reserve. | ||
* No chimpanzees were recorded in the last survey. | * No chimpanzees were recorded in the last survey. | ||
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{| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table" | {| border="1" cellpadding="5" cellspacing="0" class="Site_characteristics-table" | ||
|Species | |Species | ||
| − | |Pan troglodytes verus | + | |'Pan troglodytes verus'' |
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|Area | |Area | ||
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!Species | !Species | ||
!Year | !Year | ||
| + | !Occurrence | ||
| + | !Encounter or vistation rate (nests/km; ind/day) | ||
| + | !Density estimate [ind./ km²] (95% CI) | ||
!Abundance estimate (95% CI) | !Abundance estimate (95% CI) | ||
| − | ! | + | !Survey area |
| − | ! | + | !Sampling method |
| − | ! | + | !Analytical framework |
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!Source | !Source | ||
!Comments | !Comments | ||
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|''Pan troglodytes verus'' | |''Pan troglodytes verus'' | ||
|2009 | |2009 | ||
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| + | |0 | ||
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|Yoyo River Forest Reserve | |Yoyo River Forest Reserve | ||
|Reconnaissance walk | |Reconnaissance walk | ||
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|Gatti 2009 | |Gatti 2009 | ||
|survey effort: 22.63 km | |survey effort: 22.63 km | ||
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!Description | !Description | ||
!Year of threat | !Year of threat | ||
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| + | |10 Geological events | ||
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| + | |Absent | ||
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| + | |- | ||
| + | |12 Other threat | ||
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| + | |Absent | ||
| + | | | ||
| + | | | ||
| + | |- | ||
| + | |5 Biological resource use | ||
| + | |5.1 Hunting & collecting terrestrial animals | ||
| + | |High (more than 70% of population affected) | ||
| + | |High hunting pressure (Gatti 2009). | ||
| + | |Ongoing (2009) | ||
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|1 Residential & commercial development | |1 Residential & commercial development | ||
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|6 Human intrusions & disturbance | |6 Human intrusions & disturbance | ||
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| − | | | + | |5 Biological resource use |
| − | | | + | |5.3 Logging & wood harvesting |
| − | | | + | |Unknown |
| − | | | + | |The reserve was formerly under two timber concessions and the eastern and western parts were logged between 1962 and 1979 (BirdLife International 2022). Concessions within the reserve were acquired by SAX in 1993, and logging has taken place in selected compartments at least as early as 1999 (Gatti 2009). |
| − | | | + | |1962-1979, 1999-Ongoing (2009) |
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Latest revision as of 05:31, 19 March 2025
West Africa > Ghana > Yoyo River Forest Reserve
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Summary
- Western chimpanzees (Pan troglodytes verus) may be present in Yoyo River Forest Reserve.
- No chimpanzees were recorded in the last survey.
- The chimpanzee population trend is decreasing.
- The site has a total size of 236 km².
- Key threats to chimpanzees are hunting and logging.
- Conservation activities are not documented.
Site characteristics
Yoyo River Forest Reserve is located in southwestern Ghana, north of the town Enchi. The reserve is contiguous with Tano-Anwia and Tano-Ehuro Forest Reserves. Yoyo is also connected to Boin River Forest Reserve by a narrow strip of forest (BirdLife International 2022). The reserve was created in 1932 (Gatti 2009). The area is drained by the Yoyo river and several other streams whose valleys become swampy during the wet season (BirdLife International 2022). The site has been an Important Bird Area since 2001 (BirdLife International 2022).
Table 1. Basic site information for Yoyo River Forest Reserve
| Species | 'Pan troglodytes verus |
| Area | 236 km² |
| Coordinates | Lat: 5.960077 , Lon: -2.795357 |
| Type of site | Protected area (Forest Reserve) |
| Habitat types | Subtropical/tropical moist lowland forest |
| Type of governance |
IUCN habitat categories Site designations
Ape status
A rapid survey was conducted at the site in 2009 in the context of the Wildlife Wood Project in Ghana, which aims to assist logging companies in improving wildlife management in concession areas (Gatti 2009). No signs of chimpanzees were recorded.
Table 2. Ape population estimates reported for Yoyo River Forest Reserve
| Species | Year | Occurrence | Encounter or vistation rate (nests/km; ind/day) | Density estimate [ind./ km²] (95% CI) | Abundance estimate (95% CI) | Survey area | Sampling method | Analytical framework | Source | Comments | A.P.E.S. database ID |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pan troglodytes verus | 2009 | 0 | Yoyo River Forest Reserve | Reconnaissance walk | Gatti 2009 | survey effort: 22.63 km |
Threats
Table 3. Threats to apes reported for Yoyo River Forest Reserve
| Category | Specific threats | Threat level | Description | Year of threat |
|---|---|---|---|---|
| 10 Geological events | Absent | |||
| 12 Other threat | Absent | |||
| 5 Biological resource use | 5.1 Hunting & collecting terrestrial animals | High (more than 70% of population affected) | High hunting pressure (Gatti 2009). | Ongoing (2009) |
| 1 Residential & commercial development | Unknown | |||
| 2 Agriculture & aquaculture | Unknown | |||
| 3 Energy production & mining | Unknown | |||
| 4 Transportation & service corridors | Unknown | |||
| 6 Human intrusions & disturbance | Unknown | |||
| 7 Natural system modifications | Unknown | |||
| 8 Invasive & other problematic species, genes & diseases | Unknown | |||
| 9 Pollution | Unknown | |||
| 11 Climate change & severe weather | Unknown | |||
| 5 Biological resource use | 5.3 Logging & wood harvesting | Unknown | The reserve was formerly under two timber concessions and the eastern and western parts were logged between 1962 and 1979 (BirdLife International 2022). Concessions within the reserve were acquired by SAX in 1993, and logging has taken place in selected compartments at least as early as 1999 (Gatti 2009). | 1962-1979, 1999-Ongoing (2009) |
Conservation activities
Challenges
Table 5. Challenges reported for Yoyo River Forest Reserve
| Challenges | Specific challenges | Source | Year(s) |
|---|---|---|---|
| Not reported |
Enablers
Table 6. Enablers reported for Yoyo River Forest Reserve
| Enablers | Specific enablers | Source | Year(s) |
|---|---|---|---|
| 1 Site management | |||
| 2 Resources and capacity | |||
| 3 Engaged community | |||
| 4 Institutional support | |||
| 5 Ecological context | |||
| 6 Safety and stability |
Research activities
Documented behaviours
Table 7. Behaviours documented for Yoyo River Forest Reserve
| Behavior | Source |
|---|---|
| Not reported |
Exposure to climate change impacts
External links
Relevant datasets
References
BirdLife International (2022) Important Bird Areas factsheet: Yoyo River Forest Reserve. Downloaded from http://www.birdlife.org on 15/03/2022.
Gatti, S. (2009). Mammal surveys and capacity building for the Wildlife Wood Project - Ghana. Unpublished report to the WWP-Ghana.
Page created by: A.P.E.S. Wiki team Date: NA