scholarly journals A Quick View on Biology of Near Threatened Peacock Eel (Macrognathus aculeatus) in Khulna Region of Bangladesh

2017 ◽  
Vol 5 (2) ◽  
pp. 38-46
Author(s):  
Shamima Sultana ◽  
Kamrun Nahar ◽  
Joyanta Bir ◽  
Manash Kabiraj ◽  
Md. Nuruzzaman Khan
Keyword(s):  
Macrognathus Aculeatus ◽  
Near Threatened

Climate Change Alarms the Survival of Near Threatened Species Malayan Giant Squirrel (Ratufa bicolor Sparrman, 1778) in India

Mammal Study ◽  
2020 ◽  
Vol 45 (4) ◽  
Author(s):  
Paromit Chatterjee ◽  
Basudev Tripathy ◽  
Kailash Chandra ◽  
Goutam Kumar Saha ◽  
Krishnendu Mondal
Keyword(s):  
Climate Change ◽  
Threatened Species ◽  
Near Threatened

scholarly journals Status of Isoetes coromandeliana L.f. and Equisetum debile Roxb. ex Voucher in Gujarat State, Western India

2015 ◽  
Vol 7 (4) ◽  
pp. 441-443
Author(s):  
Suresh K. PATEL ◽  
Ronak N. KACHHIYAPATEL ◽  
Anirudh P. SINGH ◽  
Kishore S. Rajput
Keyword(s):  
Field Work ◽  
Western India ◽  
Anthropogenic Pressure ◽  
Legal Action ◽  
Work Study ◽  
Current Field ◽  
Gujarat State ◽  
New Location ◽  
Conservation And Management ◽  
Near Threatened

Occurrence of Isoetes coromandeliana L.f. in natural ponds of Harni, Savali and Tuwa (India) is known since 1956 by earlier workers. Equisetum debile Roxb. ex Voucher was also reported in 1962 growing as wild at Savali. Available literature indicates that I. coromandeliana falls under the category of ‘near threatened’ in Asian continents and as an ‘endangered species’ at national (India) level. In the current field work study, the authors could not locate the investigated species from the locations earlier documented by researchers. Few saplings of I. coromandeliana were observed at Talod and Vaktapur near Gandhinagar, a new location for the species. In contrast, E. debile appeared to be lost in wild from Gujarat. Their extinction from earlier reported locations is associated with anthropogenic pressure and thus legal action for their protection is needed. The present paper suggests further survey and habitat based studies and recommends conservation and management action plans based upon the ecology of the habitat.

scholarly journals Avifaunal records from Chalis Ek, North Andaman Island: insights into distribution of some Andaman Island birds

Check List ◽  
2013 ◽  
Vol 9 (1) ◽  
pp. 34 ◽  
Author(s):  
Pankaj Koparde ◽  
Manchi Shirish S.
Keyword(s):  
Southeast Asia ◽  
Anthropogenic Disturbance ◽  
New Records ◽  
Single Species ◽  
Iucn Red List ◽  
Red List ◽  
Andaman Island ◽  
Spatiotemporal Scale ◽  
Near Threatened

Species records are important for assessing the distribution and status of species over a spatiotemporal scale. Andaman archipelago, off Southeast Asia, is a high avian endemism area, covering an area of >5000 km2. We conducted this survey in 2011 to make an inventory of avifauna of Chalis Ek area. A total of 73 species, belonging to 61 genera and 34 families were recorded, of which 60 were resident, 11 were winter migrants, one vagrant, and a single species introduced from mainland India. Three species were found to be new records, expanding distribution. Thirteen were endemic to the Andaman and Nicobar group of islands and eleven were listed as near threatened in the IUCN Red List. This study shows that sites such as Chalis Ek, even though subject to moderate anthropogenic disturbance, still hosts a large and distinctive avifauna and should be protected.

Bycatch and landings of young of the year sharks in the Malaysian South China Sea: implications for conservation

2015 ◽  
Vol 8 ◽  
Author(s):  
Azie Azri ◽  
Takaomi Arai
Keyword(s):  
South China Sea ◽  
South China ◽  
Fishing Gear ◽  
Shark Species ◽  
Vulnerable Species ◽  
Critical Levels ◽  
Sphyrna Lewini ◽  
China Sea ◽  
Young Of The Year ◽  
Near Threatened

A total of 104 sharks were landed at fishing ports in the Malaysian South China Sea between 30 October and 24 December 2014, comprising the four families, Carcharhinidae, Hemiscylliidae, Sphyrnidae and Scyliorhinidae, and 11 of these shark species were examined. Measurements of size and weight were different and varied among species, ranging from 0.1 to 7.5 kg in body weight and from 31.1 to 105 cm in total length. Five of the 11 sharks,Carcharhinus sealei, Loxodon macrorhinus, Rhizoprionodon acutus, Hemigaleus microstomaandSphyrna lewini, were in the range of, or even less than, the lengths of those measured at birth in previous reports. The results suggest that these sharks were born just before they were landed.Sphyrna lewiniand H.microstomaare categorized as Endangered and Vulnerable species, respectively, and other sharks included in the landings are also categorized as Near Threatened. Thus, the current fishing methods could lead to critical levels of shark species in these waters, and even the future extinction of species. An improvement in the species selectiveness of fishing gear is needed to protect and conserve sharks in the area.

scholarly journals Landscape associations of globally threatened grassland birds in the Aguapey river Important Bird Area, Corrientes, Argentina

2009 ◽  
Vol 20 (1) ◽  
pp. 62-73 ◽  
Author(s):  
ADRIAN S. DI GIACOMO ◽  
PETER D. VICKERY ◽  
HERNAN CASAÑAS ◽  
OSCAR A. SPITZNAGEL ◽  
CHRISTIAN OSTROSKY ◽  
...  
Keyword(s):  
River Basin ◽  
Grassland Birds ◽  
Livestock Grazing ◽  
Tall Grass ◽  
Point Counts ◽  
Landscape Characteristics ◽  
Bird Populations ◽  
Management Actions ◽  
Land Use Plan ◽  
Near Threatened

SummaryThe Aguapey river basin in the Pampas grasslands of Argentina is the last refuge for a complete assemblage of globally threatened and Near Threatened birds. We evaluated the influence of landscape characteristics on the occurrence and abundance of six globally threatened and Near Threatened passerines. We used point counts to census birds and vegetation and quantified landscape characteristics 1,000 m from the count centres using remote sensing tools. Strange-tailed Tyrants Alectrurus risora were associated with higher percentages of tall-grass Andropogon lateralis in lowland areas. Saffron-cowled Blackbirds Xanthopsar flavus and Black-and-white Monjitas Heteroxolmis dominicana were associated with rolling landscape with wet lowland grasslands and marshes linked with dry upland grasslands. Marsh Seedeater Sporophila palustris and Chestnut Seedeater S. cinnamomea were associated with tall grasslands and marshes. Rufous-throated Seedeater S. ruficollis was not clearly associated with any type of habitat. The Aguapey grasslands are used mainly for livestock grazing and afforestation. Since 1995, approximately 50% of the original grassland habitat has been planted with exotic trees. If this trend continues, Saffron-cowled Blackbirds are likely to become extinct in the Aguapey river basin which currently supports the largest population of this species in Argentina. We recommend guidelines for establishing future reserves and wildlife management actions based on the landscape responses detected in this study. Future action should consider: maintaining connectivity between the Aguapey grasslands and the Ibera Nature Reserve, creating a protected area, designing a land use plan for the basin, avoiding afforestation in large blocks, removal of government incentives for large afforestation projects, and studying the viability of threatened bird populations in extensive cattle ranching areas.

The southern Jiangsu coast is a critical moulting site for Spoon-billed Sandpiper Calidris pygmaea and Nordmann’s Greenshank Tringa guttifer

2020 ◽  
Vol 30 (4) ◽  
pp. 649-660
Author(s):  
ZIYOU YANG ◽  
BENJAMIN J. LAGASSÉ ◽  
HUI XIAO ◽  
MICHA V. JACKSON ◽  
CHUNG-YU CHIANG ◽  
...  
Keyword(s):  
Yellow Sea ◽  
Eastern China ◽  
Extended Period ◽  
The Yellow Sea ◽  
Population Declines ◽  
Intertidal Flats ◽  
Jiangsu Coast ◽  
Waterbird Species ◽  
Southern Jiangsu ◽  
Near Threatened

SummaryThe extent of intertidal flats in the Yellow Sea region has declined significantly in the past few decades, resulting in severe population declines in several waterbird species. The Yellow Sea region holds the primary stopover sites for many shorebirds during their migration to and from northern breeding grounds. However, the functional roles of these sites in shorebirds’ stopover ecology remain poorly understood. Through field surveys between July and November 2015, we investigated the stopover and moult schedules of migratory shorebirds along the southern Jiangsu coast, eastern China during their southbound migration, with a focus on the ‘Critically Endangered’ Spoon-billed Sandpiper Calidris pygmaea and ‘Endangered’ Nordmann’s Greenshank Tringa guttifer. Long-term count data indicate that both species regularly occur in globally important number in southern Jiangsu coast, constituting 16.67–49.34% and 64.0–80.67% of their global population estimates respectively, and it is highly likely that most adults undergo their primary moult during this southbound migration stopover. Our results show that Spoon-billed Sandpiper and Nordmann’s Greenshank staged for an extended period of time (66 and 84 days, respectively) to complete their primary moult. On average, Spoon-billed Sandpipers and Nordmann’s Greenshanks started moulting primary feathers on 8 August ± 4.52 and 27 July ± 1.56 days respectively, and their moult durations were 72.58 ± 9.08 and 65.09 ± 2.40 days. In addition, some individuals of several other shorebird species including the ‘Endangered’ Great Knot Calidris tenuirostris, ‘Near Threatened’ Bar-tailed Godwit Limosa lapponica, ‘Near Threatened’ Eurasian Curlew Numenius arquata and Greater Sand Plover Charadrius leschenaultii also underwent primary moult. Our work highlights the importance of the southern Jiangsu region as the primary moulting ground for these species, reinforcing that conservation of shorebird habitat including both intertidal flats and supratidal roosting sites in this region is critical to safeguard the future of some highly threatened shorebird species.

scholarly journals Batch-produced, GIS-informed range maps for birds based on provenanced, crowd-sourced data inform conservation assessments

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259299
Author(s):  
Ryan M. Huang ◽  
Wilderson Medina ◽  
Thomas M. Brooks ◽  
Stuart H. M. Butchart ◽  
John W. Fitzpatrick ◽  
...  
Keyword(s):  
Threatened Species ◽  
Forest Cover ◽  
Systematic Approach ◽  
Bird Species ◽  
Batch Processing ◽  
Considerable Extent ◽  
Species Ranges ◽  
Conservation Assessments ◽  
And Shifts ◽  
Near Threatened

Accurate maps of species ranges are essential to inform conservation, but time-consuming to produce and update. Given the pace of change of knowledge about species distributions and shifts in ranges under climate change and land use, a need exists for timely mapping approaches that enable batch processing employing widely available data. We develop a systematic approach of batch-processing range maps and derived Area of Habitat maps for terrestrial bird species with published ranges below 125,000 km2 in Central and South America. (Area of Habitat is the habitat available to a species within its range.) We combine existing range maps with the rapidly expanding crowd-sourced eBird data of presences and absences from frequently surveyed locations, plus readily accessible, high resolution satellite data on forest cover and elevation to map the Area of Habitat available to each species. Users can interrogate the maps produced to see details of the observations that contributed to the ranges. Previous estimates of Areas of Habitat were constrained within the published ranges and thus were, by definition, smaller—typically about 30%. This reflects how little habitat within suitable elevation ranges exists within the published ranges. Our results show that on average, Areas of Habitat are 12% larger than published ranges, reflecting the often-considerable extent that eBird records expand the known distributions of species. Interestingly, there are substantial differences between threatened and non-threatened species. Some 40% of Critically Endangered, 43% of Endangered, and 55% of Vulnerable species have Areas of Habitat larger than their published ranges, compared with 31% for Near Threatened and Least Concern species. The important finding for conservation is that threatened species are generally more widespread than previously estimated.

scholarly journals Update on the Geographic Distribution of Lutra lutra at the Romanian Black Sea Coast

2017 ◽  
Vol 60 (1) ◽  
pp. 413-417 ◽  
Author(s):  
Daniyar Memedemin ◽  
Marian Tudor ◽  
Dan Cogălniceanu ◽  
Marius Skolka ◽  
Gabriel Bănică ◽  
...  
Keyword(s):  
Black Sea ◽  
Threatened Species ◽  
The Black Sea ◽  
Lutra Lutra ◽  
Black Sea Coast ◽  
European Otter ◽  
First Time ◽  
The City ◽  
Near Threatened ◽  
Sea Coast

Abstract We report the occurrence of the European otter (Lutra lutra Linnaeus, 1758) along the entire Romanian Black Sea coast, for the first time. Several sightings were within the harbor and the city of Constanţa, indicating that the otter can accommodate to and tolerate high human impact. The report is based on observations made between 2012 and 2015. The species has been previously reported from all Romanian regions but not from the Black Sea coast. The occurrences reported within this article confirm an extension of the range of this Near Threatened species on the Romanian Black Sea coast, most probably due to the increasing of population size from other sources such as the Danube floodplain.

scholarly journals Behavior, ecology and territory of the chestnut-bellied hummingbird, Saucerottia castaneiventris, in the xerophytic vegetation of the Chicamocha canyon of Colombia

2021 ◽  
Vol 16 (4) ◽  
pp. 501-520
Author(s):  
Gerson Marcel Peñuela Díaz ◽  
Ludy Archila-Durán ◽  
Jorge Parra ◽  
Juan E. Carvajal‑Cogollo
Keyword(s):  
Rainy Season ◽  
Aloe Vera ◽  
Field Trips ◽  
Floral Resources ◽  
Conservation Strategies ◽  
Territorial Defense ◽  
Dry Period ◽  
Different Seasons ◽  
Near Threatened ◽  
Opuntia Dillenii

The Chestnut-bellied Hummingbird Saucerottia castaneiventris is an endemic hummingbird of Colombia, currently categorized as Near Threatened (NT) globally and as Vulnerable (VU) in Colombia. We characterize the territorial defense and foraging behaviors of S. castaneiventris hummingbird during different seasons of the year, and we determined the size of the S. castaneiventris territory and its relationship with floral abundance at different times of the year. We made four field trips between 2008 and 2009 and registered 19 individuals from S. castaneiventris. Of these, 10 were in the rainy periods, distributed in five territories (one male and one female for each). Eight were in the dry period (July), distributed in four territories. And one individual was in the dry period of February, which did not settle in any of the identified territories. Territorial defense occupied a large part of species’ time. The nectar drinking, and insect hunting were the most frequent activities. The most common floral resources were Opuntia dillenii, Tillandsia sp. and Aloe vera. The hummingbirds Chlorostilbon gibsoni and Doryfera ludoviciae shared habitats with S. castaneiventris and there were fluctuations in encounter rates between the seasons (C. gibsoni ER: 20–7.5 and D. ludoviciae and ER: 0.0–2.5). Territories ranged between 1800 and 3800 m2 for the dry season and between 1500 and 6500 m2 for the rainy season. Our results provided primary information on the ecology of S. castaneiventris and form the basis for the formulation of conservation strategies for the species and for its habitats..

scholarly journals Justicia thailandica, a new species of Acanthaceae from Thailand

PhytoKeys ◽  
2019 ◽  
Vol 124 ◽  
pp. 11-22
Author(s):  
Yi Tong ◽  
Yunfei Deng
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Seed Morphology ◽  
Red List ◽  
Length Ratio ◽  
A New Species ◽  
Near Threatened

A new species of Justicia (Acanthaceae), J.thailandica, is described and illustrated from Thailand. The new species belongs to Justiciasect.Harnieria and is similar to J.quadrifaria and J.championii, but differs on account of the obviously densely white indumentum in the inflorescence bracts and calyx, ovate leaf blades with margin usually entire, spathulate inflorescence bracts and length ratio of calyx to mature capsule. It is assessed to be “Near threatened” (NE) according to IUCN Red List Category and Criteria. Pollen and seed morphology characters are also reported. Species of Justiciasect.Harnieria in Thailand are discussed and a key to the three recognized species is presented.

Sign in / Sign up

Export Citation Format

Share Document