Topic
Collared scops owl
About: Collared scops owl is a research topic. Over the lifetime, 18 publications have been published within this topic receiving 61 citations. The topic is also known as: Otus lettia.
Papers
1 Jan 2009
TL;DR: This paper conducted surveys for nocturnal birds (Strigiformes, Caprimulgiformes) at Bala rainforest, southern Thailand, in the ten lunar months from March to November 2004, mainly between dusk and midnight of successive nights in the week preceding full moon.
Abstract: We conducted surveys for nocturnal birds (Strigiformes, Caprimulgiformes) at Bala rainforest, southern Thailand, in the ten lunar months from March to November 2004, mainly between dusk and midnight of successive nights in the week preceding full moon. At 0.5-km intervals along the 12.6 km of road that bisects Bala, we listened for calls both before and after broadcasting a 1-min recording of the loud call for each of the species that we expected. We also searched, by day and on non-survey nights, for additional signs of nocturnal species along or near the road, especially of Buffy Fish Owl Ketupa ketupa and nightjars. From all detections of a species, whether heard calling, responding to our broadcast, or seen, we estimated its distribution, temporal and spatial relative abundance, and density along the road. Two species were new records for Bala, Oriental Bay Owl Phodilus badius and Brown Wood Owl Strix leptogrammica. Two small insectivorous species were the most widespread and abundant, Collared Scops Owl Otus bakkamoena and Javan Frogmouth Batrachostomus javensi, at ~8.0/km² and ~5.5/km², respectively. We detected three medium-sized to small species, Oriental Bay Owl, Reddish Scops Owl Otus rufescens and Brown Hawk Owl Ninox scutulata, as well as a possible fourth species, Gould’s Frogmouth Batrachostomus stellatus, only in lowland forest below ~300 m asl; all were at low overall densities of ≤1.6/km². Three large species also occurred at low densities, but probably as widely spaced territorial pairs along the road: Barred Eagle Owl Bubo sumatranus at ≤2.5 km/ pr, Brown Wood Owl Strix leptogrammica at ≤4.2 km/pr, and Buffy Fish Owl at ≤2.5 km/pr, the last estimated from spacing of signs along streambeds. Smaller species were most vocal during the middle of the dry season (May) and larger species during the south-west monsoon (August–September). Grey Nightjar Caprimulgus indicus was the only common caprimulgid, a boreal migrant detected during November to April. Our results are useful for preliminary ecological and management analyses, but require repetition, refinement of technique and comparison with results from different Indomalayan forests to improve their applicability.
11 citations
TL;DR: Comparative hematology revealed that Haemoproteus-positive BOs had higher mean cell hemoglobin concentration, total leukocyte, absolute heterophil, basophils, and monocyte counts than Haemanocyte-negative BOs, but no significant differences between Haemo-negative and -positive CSOs.
Abstract: The barn owl (BO) and the collared scops owl (CSO) are common nocturnal raptors throughout Thailand. Blood samples from 23 adult BOs and 14 CSOs were collected and processed for complete blood cell counts and parasite morphological examinations. Two Haemoproteus-positive samples were processed for ultrastructural observation. Polymerase chain reaction (PCR) analysis for a partial cytochrome b gene (cytb) from Haemoproteus was performed in all samples. Haemoproteus presence detected by light microscopy was lower than that detected by PCR (30.4% and 34.8%, respectively, in BO; and 50.0% and 78.6%, respectively, in CSO). Comparative hematology revealed that Haemoproteus-positive BOs had higher mean cell hemoglobin concentration, total leukocyte, absolute heterophil, basophil, and monocyte counts than Haemoproteus-negative BOs, but no significant differences between Haemoproteus-negative and -positive CSOs. Monocyte ultrastructure analysis revealed a role in the elimination of gametocytes. Morphologically, the Haemoproteus in 3 BOs and 6 CSOs were identified as H. noctuae, while that in 1 CSO was identified as H. syrnii. Phylogenetic analysis indicated the Haemoproteus spp. in 8 BOs and 7 CSOs were not closely related to H. noctuae or H. syrnii, and the cytb of 2 CSOs was that of H. syrnii. These results should be useful for study of Haemoproteus.
10 citations
7 citations
TL;DR: Two different ravine cum re-afforested plantation areas in the Auroville bioregion constituted the study sites, and the dominant vegetation being grasses Aristida sp.
Abstract: Two different ravine cum re-afforested plantation areas in the Auroville bioregion constituted the study sites: 'Aspiration', about a kilometre from the seashore, entirely forested with an average tree height of 10m. (afforestation since 1977), and 'Aranya', about 12km from the seashore in the vicinity of Ousteri Lake, with an average tree height of 5m (afforestation since 1993) and the dominant vegetation being grasses Aristida sp., Paspalum sp., Heteropogon contortus, etc. (Fig. 1).
7 citations
1 Jun 2011
TL;DR: It is demonstrated that several of the existing primer sets can be used for sex determination of several captive breeding and indigenous bird species and showed that CHD1 gene primers could be used to correctly identify the sex of Black Swans, Nicobar Pigeons and Crested Serpent Eagles, but it could not be usedTo correctly identify sex in Collared Scops Owls, Tawny Fish Owl, Crested Goshawks.
Abstract: Many bird species, for example Crested Serpent Eagle (Spilornis cheela hoya), Collared Scops Owl (Otus bakkamoena), Tawny Fish Owl (Ketupa flavipes), Crested Goshawk (Accipiter trivirgatus), Grass Owl (Tyto longimembris), etc., are monomorphic, which is difficult to identify their sex simply by their outward appearance. Especially for those monomorphic endangered species, finding an effective tool to identify their sex beside outward appearance is needed for further captive breeding programs or other conservation plans. In this study, we collected samples of Crested Serpent Eagle, Collared Scops Owl, Tawny Fish Owl, Crested Goshawk, and Grass Owl, five protected monomorphic species in Taiwan, as well as Black Swan (Cygmus atratus) and Nicobar Pigeon (Caloenas nicobarica), two aviary introduced monomorphic species served as a control group. We used sex-specific primers of avian CHD1 (chromo-helicase-DNA-binding) gene and EE0.6 (EcoRI 0.6-kb fragment) sequences to identify the sex of these birds. The results showed that CHD1 gene primers could be used to correctly identify the sex of Black Swans, Nicobar Pigeons and Crested Serpent Eagles, but it could not be used to correctly identify sex in Collared Scops Owls, Tawny Fish Owls, and Crested Goshawks. In the sex identification using EE0.6 sequence fragments, A, C, D and E primer sets could be used for sexing Black Swans; A, B, C, and D primer sets could be used for sexing Crested Serpent Eagles; and E primer set could be used for sexing Nicobar Pigeons and the two owl species. Correct determination of sex is the first step if a captive breeding measure is required. We have demonstrated that several of the existing primer sets can be used for sex determination of several captive breeding and indigenous bird species.
6 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2018 | 1 |
| 2015 | 1 |
| 2014 | 1 |
| 2013 | 3 |
| 2012 | 2 |