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- 저자 : Taofik Oyedele Dauda (검색결과 2 건)
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Birds' species diversity measurement of Uchali Wetland (Ramsar site) Pakistan
Taofik Oyedele Dauda,Md. Hafiz Baksh,Anuar Mohd. Sah Shahrul 국립중앙과학관 2017 Journal of Asia-Pacific Biodiversity Vol.10 No.2
We carried out this study to evaluate bird species diversity and to model bird species abundance using Uchali Wetland, Pakistan (32°33′N, 72°01′E). Data obtained were subjected to summary statistics, Simpson diversity, Shannon evenness index, and rank abundance curve and model. The watershed supports 25,361 birds of 47 species, which is appreciably less than the number of bird species supported by the same wetland in the past year (1991). Total evenness could be obtained as the ranks increases and this differed annually. Evenness index (EI) analysis showed that EI for 2011 was 0.0231, for 2012, it was 0.02, for 2013, it was 0.01, and for the annual mean, it was 0.046 indicating functional abundance of the species. Bird species diversity measurement could be enhanced by the use of the modified rank–abundance curve and would clearly present the true picture of the bird species abundance.
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Co-integration analysis of captureerecapture method in toad, Phrynoidis aspera (Gravenhorst, 1829)
Anuar Mohd Sar Shahrul,Taofik Oyedele Dauda,C.C. Hong,Evan Quah,Taiwo Omodele 국립중앙과학관 2019 Journal of Asia-Pacific Biodiversity Vol.12 No.1
The Asian giant toad, Phrynoidis aspera, research is faced mainly with twin challenges of conservationand efficient sampling techniques for research purposes. This research is therefore conducted to assessthe co-integration feature of the captureerecapture methods and to evaluate both long- and short-termeffect of capture on the recapture of P. aspera using Titi Kerawang waterfall (N05 24.23/E100 13.41/),Teluk Bahang. Toads encountered in the study area were caught and marked using PIT tags weekly. Dataobtained were subjected to summary statistics (mean, standard error, and variance), correlogram, crosscorrelogram, stationary test, and exogenous and endogenous variable determination. Mean Asian gianttoad recaptured fell between three for the 2nd week and 25 for the 14th week. For the capture, the rangewas between zero for the 12th week and nine for the 3rd week, while the 1st capture was 12 toads. Therewas no visible similarity in the variances of the toad indices indicated by the correlogram of both captureand recapture as well as their cross-correlogram. The cross-correlogram ranged between 0.6665 and0.4029. From these results, randomness of data as well as their independence can thus be established. Also, the results portray that the summary statistics does not present any visible stationary trend in bothtoad capture and recapture. The raw data can therefore be said to be nonstationary (that is variance oftoad capture/recapture in a week, xt is not dependent on preceding week, xt-1). The augmented DickeyeFuller statistics of both capture (0.97294 to 3.92035) and recapture (1.13288 to 4.00443) indicatedstrong evidence that both capture and recapture series of the nontransformed data on the long run areI(1). The short-run co-integration according to this study contrast with the long-run co-integration.
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