No abstract

The Cat Ba Biosphere Reserve is internationally renowned for its spectacular karst landscape. It covers a large area with hundreds of limestone islands and various ecosystems including caves, tropical forests, and mangroves. However, previous surveys were only conducted in terrestrial ecosystems on Cat Ba Island. Therefore, bats inhabiting mangroves and the remaining islands did not receive attention from scientists up to 2014. To initially fill in the gaps, we conducted ten bat surveys between 2015 and 2020 with an emphasis on mangroves and previously unsurveyed islands. Bats were captured using mist nets and harp traps. Twenty-three species belonging to 13 genera of six families were recorded during the surveys. Of these, four species (Macroglossus minimus, Myotis hasselti, Phoniscus jagorii, Tylonycteris fulvida) are new to the reserve. Remarkably, 15 species belonging to seven genera of five families were captured in mangrove, which is the highest species diversity for bats reported from any mangrove area in mainland Southeast Asia. Based on results from the surveys and literature review, we here provide the most updated bat diversity of the reserve with confirmed records of 32 bat species belonging to 16 genera of six families. Historical records of each species in the literature were reviewed. Two species, Scotophilus heathi and Scotophilus kuhlii, are unconfirmed because of unclear evidence in previous publications. Results of this study indicated that the mangrove ecosystem is important for bats but still poorly studied in Cat Ba Biosphere Reserve and Vietnam as a whole. In addition, morphological measurements, echolocation data, distributional records, and conservation status of each species are also given in this paper for potential research and conservation campaigns in the future.

Ecology of rodents of tropical forest in Vietnam. The paper presents the ecological studies of rodents in Kon ha ming Station. In the forest biotope the Maxomys surifer is dominant while in the savanna there are Menetes berdrnorei and Rattus sladeni. The abundance index and density of rodents in savanna and cultivated land are higher than those of evegreen forest.The production of rodents took place intensively in the period of March-June. The food consumption of rodents with active behaviour are higher than those of quiet species. The digestive efficiency of tropical rodents is high probably connecting the tendency of their reproduction and growth in this region.Resume. -L'ecologie des rongeurs de foret tropicale a ete etudiee au Vietnam dans la Station de Kon ha ming. Dans les biotopes de foret, Maxomys surifer domine, tandis que dans les savanes on trouve surtout Menetes berdmorei et Rattus sladeni. Les rongeurs sont plus abondants en savane et en zone cultivee qu'en foret.C'est de mars juin que Γόη constate la plus grande abondance des rongeurs. La consommation de nourriture est plus grande chez les rongeurs les plus actifs. La quantite de nourriture consommee par rongeurs est en r pport avec leur Strategie de reproduction et leur taux de croissance.

No abstract

Cat Ba National Park is the core zone of the Cat Ba Archipelago Biosphere Reserve. It contains quite diverse and unique ecosystems including 776 ha of mangrove forest. Although bats of the park were included in many publications, none were recorded from the mangrove ecosystem. We recently conducted field surveys through the wetland areas of the park and recorded three horseshoe bat species: Marshall's horseshoe bat (Rhinolophus marshalli), Pearson’s horseshoe bat (Rhinolophus pearsonii), and the least horseshoe bat (R. pusillus). Of these, R. pearsonii is the most common species. We here provide morpholocal and acoustic features of each species with notes on the importance of the mangrove forest in the park for bat research and conservation.