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

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160 Sunderland et al. No. of individuals (n = 142) 80 70 60 50 40 30 20 10 0 0~10 10~20 20~30 30~40 40~50 4 Results and Discussion 4.1 Bush mango (Irvingia gabonesis 1 ) Table 3 summarizes the transect data for Irvinga gabonensis). The Takamanda and Matene sites have a greater abundance of bush mango than Obonyi I and Mfakwe. Takamanda and Obonyi I have relatively few large-diameter individuals (>10 cm dbh), indicating that there are less productive trees in these areas. In the case of Takamanda, this is because of poor recruitment and survival to maturity, most likely stemming from overharvesting of fruit. Matene is by far the most productive Takamanda: the Biodiversity of an African Rainforest 50~60 60~70 Size-class (cm) 70~80 80~90 90~100 Figure 2. Number of individuals sampled and size-classes for bush mango, Takamanda Forest Reserve, Cameroon. Site Total no. of individuals Mean no. of individuals/ha >100 area for bush mango, with high numbers of individual trees >10 cm dbh. The cumulative size-class distribution for bush mango shows irregularities in recruitment (Figure 2). This may be caused by the tendency of bush mango to mast, but is more likely due to long-term harvesting of fruits and seeds. 1 Irvingia wombolu is not common in the TFR and was not encountered during the inventory. Table 3. Summary of data collected from transects for bush mango in Takamanda Forest Reserve, Cameroon Mean no. of individuals/ha >10cm dbh Mean dbh (cm) Takamanda 51 12.75 2.5 10.07 Obonyi I 23 5.75 3 43.7 Matene 46 11.5 8.25 38.02 Mfakwe 22 5.5 3.75 23.5 Mean (all sites) 35.5 8.88 4.38 28.82
Distribution, Utilization, and Sustainability of NTFPs No. of individuals (n = 490) 200 150 100 50 0 4.2 Randia chewing stick (Massularia acuminata) 2~3 3~4 4~5 5~6 6~7 >7 Table 4 summarizes the transect data for Massularia acuminata. Distribution of Randia is relatively constant throughout the Reserve, with correspondingly constant numbers of productive stems / ha. The low mean dbh is a result of over-exploitation of larger individuals. The erratic cumulative size-class distribution shows irregular regeneration and recruitment, corresponding to Size-class (cm) Figure 3. Number of individuals sampled and size-classes for Randia, Takamanda Forest Reserve, Cameroon. Site Total no. of individuals Mean no. of individuals/ha the removal of mature individuals (Figure 3). Hence, exploitation is having a long-term effect on the population. 4.3 Hausa cattle stick (Carpolobia spp.) 161 Table 5 summarizes the transect data for Carpolobia spp. These are predominantly lowland species and hence are not present in any significant numbers in higherelevation Matene. Over-exploitation in Obonyi I and Mfakwe resulted in low numbers of mature individuals, Table 4. Summary of data collected for Randia from transects in Takamanda Forest Reserve, Cameroon Mean no. of individuals/ha >10cm dbh Mean dbh (cm) Takamanda 157 39.25 13.75 3.23 Obonyi I 143 35.75 8.75 3.19 Matene 91 22.75 11 4.23 Mfakwe 99 24.75 10.5 4.05 Mean (all sites) 122.5 30.6 11 3.68 SI/MAB Series #8, 2003
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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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4 Sunderland-Groves et al. Rainfall
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6 Sunderland-Groves et al. 7 Conser
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8 Sunderland-Groves et al. Europe,
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10 Comiskey and Dallmeier 2 Challen
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12 Comiskey and Dallmeier 5 Adaptiv
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14 Comiskey and Dallmeier identifie
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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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48 Sunderland et al. Rhabdophyllum
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50 Sunderland et al. Aningeria robu
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52 Sunderland et al. Nervilia sp. P
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54 Sunderland et al. g—2˜— @y
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56 O’Kah f22 y2@w—˜A g—22@IE
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58 O’Kah Table 3. Species found i
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60 O’Kah Table 6. Indicators of s
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62 O’Kah Larsen, T. B. 1997. Butt
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64 O’Kah Appendix 1 (cont.). Chec
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66 O’Kah Appendix 1 (cont.). Chec
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68 O’Kah Species distribution Tak
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70 O’Kah Species distribution Tak
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72 Takamanda: the Biodiversity of a
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74 h—2@y——A 2 IE2— y2@w—
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76 The sites which have been survey
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78 species from a phylogenetic poin
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80 Appendix 1. Species list and sam
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82 Family / Species Notes Locations
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84 LeBreton et al. 3 Methods A team
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86 LeBreton et al. Bothrolycus ater
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88 LeBreton et al. an important par
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90 LeBreton et al. Perret, J.-L. 19
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92 LeBreton et al. Appendix 1 (cont
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94 LeBreton et al. Appendix 1 (cont
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96 Languy and Motombe f 5 q—2˜
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98 Languy and Motombe Table 3. Thre
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100 Languy and Motombe encroachment
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102 Languy and Motombe Appendix 1.
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104 Languy and Motombe Appendix 1 (
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Page 172 and 173: No. of individuals (n = 315) 200 15
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