Fisheries in the Southern Border Zone of Takamanda - Impact ...

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98 Languy and Motombe Table 3. Threatened bird species of Takamanda Forest Reserve, Cameroon. EN: endangered; VU: vulnerable; NT: near-threatened. IUCN English name Scientific name EN White-throated Mountain Babbler Kupeornis gilberti VU Grey-necked Picathartes Picathartes oreas VU Bannerman©s Weaver Ploceus bannermani NT Hartlaub©s Duck Pteronetta hartlaubii NT Yellow-casqued Wattled Hornbill Ceratogymna elata NT Cameroon Montane Greenbul Andropadus montanus NT Crossley©s Groundthrush Zoothera crossleyi NT Bangwa Forest Warbler Bradypterus bangwaensis NT White-tailed Warbler Poliolais lopezi 3.4 Biome-restricted species: Afromontane biome The survey also discovered a significant component of afro-montane avifauna. Altogether, 28 afro-montane species were recorded (Appendix 1), more than previously believed existed in this area. For many species, their occurrence at Takamanda significantly extends their known range in Cameroon; for some, including Kupeornis gilberti and Poliolais lopezi, the closest known records in Cameroon are more than 100 km distant. Most montane species at Takamanda are known from the nearby Obudu Plateau in Nigeria (Fishpool and Evans 2001) however, so their presence is not totally unexpected. 3.5 Biome-restricted species: lowland (Guineo-Congolian) forest biome The occurrence of 139 species restricted to the Guineo- Congolian forest (Appendix 1), although expected, is Takamanda: the Biodiversity of an African Rainforest particularly interesting and confirms that Takamanda Forest Reserve holds a vast component of lowland forest avifauna. Protection of the Reserve would preserve a representative sample of the lowland forest avifauna. It should be noted that two species—Sun Lark Galerida modesta and the Bush Petronia Petronia dentate—which are more typical of Guinean savannas were recorded in the grasslands. 3.6 Other interesting records The survey recorded two species that are new to Cameroon—Ussher’s Flycatcher Muscicapa ussheri, observed twice (once in the vicinity of its close relative Sooty Flycatcher Muscicapa infuscate) and Grey-headed Bristlebill Bleda canicapilla, which was captured in mist nets on two occasions. The discovery of Ussher’s Flycatcher was not totally unexpected, given that there are records of this bird about 50 km from Takamanda in eastern Nigeria (Elgood 1994). Grey-headed Bristlebill reaches its eastern limit at the Cameroon-Nigeria border. Other species of interest include Tufted Duck Aythya fuligula (Bobo et al. 2000), recorded on the Magbe River with other aquatic species, and Capuchin Babbler Phyllanthus atripennis, recorded at Obonyi 1 and Kepani. On four occasions, we recorded Kemp’s Longbill Macrosphenus kempi, a West African species that is sympatric with Yellow Longbill Macrosphenus flavicans as the two species meet along the Cameroon-Nigeria border. The only other site for Kemp’s Longbill in Cameroon is Korup National Park (Rodewald and Bowden 1995). An interesting record from a biogeographical perspective is the presence of both Red-cheeked Wattleeye Dyaphorophyia blisseti and Black-necked Wattleeye Dyaphorophyia chalybea. These two closely related species replace each other: Red-cheeked Wattle-eye is a West African species reaching its eastern limit in Cameroon, with records around Mt. Cameroon and Kumba (Louette 1981). The two species were not
Assessment of the Bird Fauna Table 4. Restricted range (total world range less than 50.000 km²) bird species of Takamanda Forest Reserve, Cameroon. GCL: species confined to the Gabon-Cameroon Lowland Forest Endemic Bird Area; CNM: species confined to the Cameroon-Nigeria Mountain. EBA English name Scientific name GCL Forest Swallow Hirundo fuliginosa GCL Grey-necked Picathartes GCL Rachel©s Malimbe CNM Cameroon Montane Greenbul CNM Grey-throated Greenbul CNM Cameroon Olive Greenbul CNM Mountain Robin- Chat CNM Bangwa Forest Warbler CNM Brown-backed Cisticola Picathartes oreas Malimbus racheliae Andropadus montanus Andropadus tephrolaemus Phyllastrephus poensis Cossypha isabellae Bradypterus bangwaensis Cisticola discolor CNM Green Longtail Urolais epichlora CNM White-tailed Warbler Poliolais lopezi CNM Black-capped Woodland Warbler Phylloscopus herberti CNM White-throated Mountain Babbler Kupeornis gilberti CNM Cameroon Blueheaded Sunbird Cyanomitra oritis CNM Yellow-breasted Boubou Laniarius atroflavus CNM Bannerman©s Weaver Ploceus bannermani recorded together at the same spot (they were about 3 km apart), but their ranges obviously meet in Takamanda, with possibly an overlap and an ecological separation as shown by Eisentraut (1973) to occur around Mt. Cameroon and Kumba. The current surveys also extended to the north the range in Cameroon of more than 20 lowland forest species. Finally, we recorded two adult males of an unidentified Malimbe Malimbus species at Obonyi I for more than 15 minutes on a dead tree in farm bush. The description of the birds fits the highly threatened and local Ibadan Malimbe Malimbus ibadanensis, which is so far known only from western Nigeria. The birds were vocal, and the song and calls did not fit any other species of Malimbe. Unfortunately, there are no recordings of M. ibadanensis for comparison. Because Ibadan Malimbe is very rare and local, we need confirmation of our observation. We also note several unconfirmed records of the closely related Cassin’s Malimbe Malimbus cassini west of the Sanaga, where this species is not found (Louette 1981, Keen 1993, Williams 1993). We do not rule out the possibility that these records may refer to the unknown species of Malimbe that we recorded or to Ibadan Malimbe. 4 Conclusions 4.1 Takamanda is an Important Bird Area Takamanda Forest Reserve clearly qualifies as an Important Bird Area, based on the three following criteria: presence of endangered species, presence of restricted-range species, and occurrence of a vast array of biome-restricted species. 4.2 Regional significance of Takamanda Forest Reserve The montane and sub-montane avifauna of Takamanda is more important than previously thought. The highest sector of Takamanda Forest Reserve must be considered, from a biological point of view, as an extension of the Obudu plateau. The occurrence of a large montane avifauna, with several endangered and endemic species, definitely deserves special attention from a conservation perspective. As noted, of special significance is the midaltitude transition forest, which suffers from SI/MAB Series #8, 2003 99
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Smithsonian Institution SI/MAB Biod
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ii 10. Fisheries in the Southern Bo
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Mercy Abwe Dione Dept. of Biology,
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The Smithsonian Institution has lon
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The editors of this publication ext
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2 Sunderland-Groves et al. Figure 1
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16 Comiskey and Dallmeier 5.4 Evalu
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18 Takamanda: the Biodiversity of a
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20 Sunderland et al. preliminary la
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22 Sunderland et al. avoided protru
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24 Sunderland et al. Table 2. Summa
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26 Sunderland et al. lowland forest
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28 Sunderland et al. impressive cat
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30 Sunderland et al. Herbaceous flo
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32 Sunderland et al. Table 3. Compa
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34 Sunderland et al. 5.5 Economic P
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36 Sunderland et al. Table 5. Summa
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38 Sunderland et al. monitoring pro
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40 Sunderland et al. Letouzey, R. 1
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42 Sunderland et al. Appendix 1. Pl
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44 Sunderland et al. Agelaea pentag
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46 Sunderland et al. Afzelia pachyl
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148 Mdaihli et al. Mochokidae Barbu
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150 Monthly yield (t) 200 160 120 8
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No. of individuals (n = 315) 200 15
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No. of individuals (n = 1065) 1000
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Gnetum spp. Piper guineensis Site T
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Resource Impacts of seasonality Ava
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Box. Large-scale exploitation of no
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178 Slayback Table 2: Areas of outp
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180 Takamanda: the Biodiversity of
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