Estimating chimpanzee population size with nest counts: validating methods in Taï National Park

2009 ◽  
Vol 71 (6) ◽  
pp. 447-457 ◽  
Author(s):  
Célestin Yao Kouakou ◽  
Christophe Boesch ◽  
Hjalmar Kuehl
Keyword(s):  
Population Size ◽  
National Park ◽  
Taï National Park ◽  
Tai National Park ◽  
Chimpanzee Population

scholarly journals Population size and habitat of the White-breasted Guineafowl Agelastes meleagrides in the Taï region, Côte d'Ivoire

2009 ◽  
Vol 20 (1) ◽  
pp. 74-83 ◽  
Author(s):  
MATTHIAS WALTERT ◽  
CHARLOTTE SEIFERT ◽  
GERHARD RADL ◽  
BERND HOPPE-DOMINIK
Keyword(s):  
Population Size ◽  
Cote D'ivoire ◽  
National Park ◽  
Côte D’Ivoire ◽  
Encounter Rate ◽  
Cote D’Ivoire ◽  
Taï National Park ◽  
Côte D'ivoire ◽  
Tai National Park ◽  
The Impact

SummaryThe White-breasted Guineafowl Agelastes meleagrides is one of 15 bird species endemic to the Upper Guinea Forests of West Africa. The Taï region in southwestern Côte d'Ivoire probably holds one of the largest remaining populations of this species. We assessed population density in two different sectors in the southern part of Taï National Park and one sector in the N'Zo Faunal Reserve, north of the National Park. The sectors differ in rainfall patterns and hence vegetation type, as well as in previous and past levels of logging and hunting. Line transect surveys were undertaken between 2000 and 2001 with an overall survey effort of 2,883 km. Abundance was highest in the sector with the driest forest type, the N'Zo Faunal Reserve (encounter rate: 0.02 detections km−1, density: 32.9 ind. km−2), where we also observed the largest group recorded for the species so far (38 individuals). The species was almost absent in the southeast of Taï National Park (encounter rate: <0.002 detections km−1), where the impact of poaching on wildlife is strongest. The study confirms that the species reaches highest densities in drier forests and only occurs in smaller numbers in the wetter south of the Taï region. Our data also suggest that past disturbance from logging does not constitute an obstacle for its persistence. The population size in Taï National Park and N'Zo Faunal Reserve should be between 42,000 and 120,000 individuals.

scholarly journals A Novel Orthohepadnavirus Identified in a Dead Maxwell’s Duiker (Philantomba maxwellii) in Taï National Park, Côte d’Ivoire

Viruses ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 279 ◽  
Author(s):  
Jan Gogarten ◽  
Markus Ulrich ◽  
Nishit Bhuva ◽  
Joel Garcia ◽  
Komal Jain ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
National Park ◽  
Côte D’Ivoire ◽  
New Technologies ◽  
Cote D’Ivoire ◽  
Taï National Park ◽  
Côte D'ivoire ◽  
Copy Numbers ◽  
Viral Copy ◽  
Tai National Park

New technologies enable viral discovery in a diversity of hosts, providing insights into viral evolution. We used one such approach, the virome capture sequencing for vertebrate viruses (VirCapSeq-VERT) platform, on 21 samples originating from six dead Maxwell’s duikers (Philantomba maxwellii) from Taï National Park, Côte d’Ivoire. We detected the presence of an orthohepadnavirus in one animal and characterized its 3128 bp genome. The highest viral copy numbers were detected in the spleen, followed by the lung, blood, and liver, with the lowest copy numbers in the kidney and heart; the virus was not detected in the jejunum. Viral copy numbers in the blood were in the range known from humans with active chronic infections leading to liver histolytic damage, suggesting this virus could be pathogenic in duikers, though many orthohepadnaviruses appear to be apathogenic in other hosts, precluding a formal test of this hypothesis. The virus was not detected in 29 other dead duiker samples from the Côte d’Ivoire and Central African Republic, suggesting either a spillover event or a low prevalence in these populations. Phylogenetic analysis placed the virus as a divergent member of the mammalian clade of orthohepadnaviruses, though its relationship to other orthohepadnaviruses remains uncertain. This represents the first orthohepadnavirus described in an artiodactyl. We have tentatively named this new member of the genus Orthohepadnavirus (family Hepadnaviridae), Taï Forest hepadnavirus. Further studies are needed to determine whether it, or some close relatives, are present in a broader range of artiodactyls, including livestock.

scholarly journals Inventaire spécifique et caractéristiques de quelques frayères du lac de Buyo dans le Parc National de Taï (Sud-Ouest Côte d’Ivoire)

2020 ◽  
Vol 145 ◽  
pp. 14902-14913
Author(s):  
N’DRI Olga Rosemonde ◽  
KONAN Yao Aristide ◽  
MONNEY Attoubé Ida ◽  
KONE Tidiani
Keyword(s):  
Cote D'ivoire ◽  
National Park ◽  
Sexual Maturity ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Taï National Park ◽  
Côte D'ivoire ◽  
Spawning Areas ◽  
Tai National Park ◽  
Spawning Sites

Objectifs : Des investigations ont été menées dans 11 sites du lac de Buyo situés sur le cours du fleuve Sassandra dans le Parc National de Taï (Côte d’Ivoire) en vue de connaître les espèces de poisson qui utilisent ces zones comme sites de reproduction. Méthodologie et Résultats : Dans chaque site d’échantillonnage, les variables environnementales ont été mesurées et les poissons ont été capturés à l’aide de filets maillants. Les stades de maturité sexuelle avancés ont été considérés comme critères de reconnaissance des sites de fraie. La richesse spécifique a été de 32 espèces, répartie en 13 familles et dominée par les Cichlidae (7 espèces, soit 22%). Sur la base des stades sexuels de maturité, 14 espèces, en phase de reproduction, ont été capturées dans les 11 sites d’échantillonnage. Les résultats de l’analyse des sédiments ont indiqué une prédominance de sable (>60%) dans les sites de reproduction et des valeurs optimales de température (28,52°C), de pH (6,53), de conductivité (36,50 μS/cm) et d’oxygène dissous (5,37 mg/l). Conclusion et application des résultats : La présente étude a montré que les sites échantillonnés dans le lac de Buyo situé à l’intérieur du le Parc National de Taï sont caractérisés par des sédiments sableux et constituent des frayères pour plusieurs espèces de poisson. La localisation de ces zones de reproduction représente donc un outil important pour les gestionnaires dans la conservation de la diversité piscicole du parc national de Taï. Mots clés : sites de frai, stade de maturité sexuelle, ichtyofaune, lac de barrage de Buyo. Specific inventory and characteristics of some spawning grounds of Lake Buyo in the Taï National Park (South-West Côte d'Ivoire) Abstract Objectives: Investigations were carried out in 11 sites of Lake Buyo located in the midstream of Sassandra River in Taï National Park (Côte d'Ivoire) to get to know fish species that use these areas as spawning sites. Methodology and Results: Environmental variables were measured in each sampling sites and fish were caught using gillnets. Advanced stages of sexual maturity were considered as recognition criteria of spawning areas. Specific richness was of 32 species, belonging in 13 families and dominated by Cichlidae (7 species, 22%). Based on advanced sexual maturity stages, 14 species in spawning period, were captured at the 11 sampling sites. Results of sediment analysis indicated a predominance of sand (> 60%) in spawning sites and optimal values of temperature (28.52°C), pH (6,53), conductivity (36,50 μS/cm) and dissolved oxygen (5,37 mg/l). Conclusion and application of results: The present study showed that sites sampled in Lake Buyo located within the Tai National Park are characterized by sandy sediments and constitute spawning areas for several fish species. The location of these spawning areas therefore is an important tool for managers in conserving fish diversity of Taï National Park. Keywords: spawning sites, stage of sexual maturity, Ichtyofauna, Buyo Dam Lake.

Rank changes in female chimpanzees in Taï National Park

2019 ◽  
pp. 290-300 ◽  
Author(s):  
Alexander Mielke ◽  
Catherine Crockford ◽  
Roman Wittig
Keyword(s):  
National Park ◽  
Taï National Park ◽  
Tai National Park

scholarly journals Seasonal variation in hornbill abundance in a West African national park detected using analysis of acoustic recordings

2007 ◽  
Vol 17 (3) ◽  
pp. 235-244 ◽  
Author(s):  
Hugo J. Rainey ◽  
Klaus Zuberbühler
Keyword(s):  
Seasonal Variation ◽  
Nous Avons ◽  
Cote D'ivoire ◽  
National Park ◽  
Côte D’Ivoire ◽  
Distance Sampling ◽  
Cote D’Ivoire ◽  
Taï National Park ◽  
Côte D'ivoire ◽  
Tai National Park

AbstractDistance sampling, line transects and radio-tracking have been used previously to estimate population abundances and movements of hornbills. We used a large dataset of audio recordings made over 10 years to estimate seasonal variation in abundance of three species: Black-casqued Hornbill Ceratogymna atrata, Yellow-casqued Hornbill C. elata and Brown-cheeked Hornbill Bycanistes cylindricus, in Taï National Park, Côte d'Ivoire. The latter two species are Near Threatened. Recordings of hornbill wing-beats were used to control for potential seasonal variation in call production. Yellow- and Black-casqued Hornbill calls were 10 times as abundant from July to February as they were from March to June. Brown-cheeked Hornbills showed a similar trend, but less pronounced. From these data we concluded that large numbers of Yellow- and Black-casqued Hornbills had left the Taï National Park during this period. The significance of these findings is discussed in relation to the fragmentation and regeneration of the Upper Guinea forests and the relatively small size of the remaining forest habitat in the region.Les taux d'abondance et de mouvement des populations de calaos étaient auparavant estimés par un échantillonnage et des analyses sur le logiciel Distance, des transects linéaires et des repérages télémétriques. Nous avons eu recours è un grand ensemble d'enregistrements audio effectués sur plus de 10 ans afin d'estimer la variation saisonniàre de l'abondance de trois espàces rencontrées dans le Parc National de Taï, en Côte d'Ivoire : le Grand Calao è Casque Noir Ceratogymna atrata, le Grand Calao è Casque Jaune Ceratogymna elata et le Calao è Joues Brunes Bycanistes cylindricus. Ces deux derniàres espàces sont aujourd'hui considérées comme presque menacées. Nous avons procédé è des enregistrements de battements d'ailes pour tester une potentielle variation saisonniàre de la production des cris. Les cris des Grands Calaos è Casque Jaune et è Casque Noir étaient dix fois plus abondants entre juillet et février qu'entre mars et juin. En revanche, les Calaos è Joues Brunes n'ont présenté qu'une petite variation du taux d'abondance entre ces deux périodes. D'apràs ces données, nous avons conclu qu'un grand nombre de Calaos è Casque Jaune et è Casque Noir quittent le Parc National de Taï entre mars et juin. La signification de ces découvertes est discutée en tenant compte de la fragmentation et de la régénération des forêts de Haute Guinée ainsi que de la dimension relativement petite de l'habitat forestier subsistant dans cette région.

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