scholarly journals Population status and feeding behavior of black kite (Milvus migrans) in Dhaka city, Bangladesh

2021 ◽  
Vol 9 (1-2) ◽  
pp. 35-48
Author(s):  
Md Amdadul Haque ◽  
Rasel Ahammed ◽  
Monirujjaman ◽  
Md Abraharul Islam ◽  
Md Nahid H Khan ◽  
...  
Keyword(s):  
Population Density ◽  
Feeding Behavior ◽  
Sampling Method ◽  
Population Estimation ◽  
Foraging Strategies ◽  
Dhaka City ◽  
Population Status ◽  
Milvus Migrans ◽  
Black Kite ◽  
The Status

The status and feeding behavior of black kite (Milvus migrans) in Dhaka city were studied from July 2015 to June 2017. Road transects and morning roost-count method were used for population estimation and distribution, whereas focal sampling method was used to study the feeding and foraging behavior. Based on roosting and foraging areas, five transects were selected for population estimation. Moreover, six different feeding areas were selected for identifying various types of consumed food and assessing the feeding behavior of black kite. The black kite population was estimated at (1296±5.87) in Dhaka city. The population density was estimated at 21.8/km2. Among selected five different transects, the recorded population ranged from 108.12±6.70, 8.34%) at S-3 (Mirpur to Ramna Park) to 805±11.88, 62.11% of individuals at S-5 (Gulistan to Demra). The present study revealed that black kites were distributed throughout the study area and the distribution was influenced by availability of food, water and roosting place. Based on the annual records, the highest population (1510±6.92) was found in 2016. Majority of black kites fed on offal and insects in study area. In garbage dumps, the highest rate of feeding was recorded in afternoon followed by in morning and lowest in the noon. Whereas in non-garbage feeding areas, the highest rate was recorded in the morning followed by in the afternoon and lowest in the noon. Among four different foraging strategies, food collection by kites standing on the ground and intraspecific cleptoparasitism was never observed during study period while interspecific cleptoparasitism (against crows) was the highest number (193.67±2.77, 68.43%). Jahangirnagar University J. Biol. Sci. 9(1 & 2): 35-48, 2020 (June & December)

Nesting dispersion of a Black Kite population in relation to location of rabbit warrens

1994 ◽  
Vol 72 (9) ◽  
pp. 1680-1683 ◽  
Author(s):  
Javier Viñuela ◽  
Rafael Villafuerte ◽  
Claudine De Le Court
Keyword(s):  
Population Density ◽  
National Park ◽  
Oryctolagus Cuniculus ◽  
Considerable Increase ◽  
Breeding Area ◽  
Doñana National Park ◽  
Main Prey ◽  
Milvus Migrans ◽  
Black Kite ◽  
Feeding Resources

Previous studies have shown that the rabbit (Oryctolagus cuniculus) is the main prey of the Black Kite (Milvus migrans) in Matasgordas (Doñana National Park, southwestern Spain), and that the reproductive success of pairs is enhanced with increasing rabbit consumption. In our study area, rabbits live mainly in large warrens patchily distributed across the breeding area of Black Kites. Rabbit consumption was higher for Black Kite pairs having warren entrances close to their nests. During the 3 years of the study, this population of Black Kites suffered a considerable increase. New pairs in the area selected nesting trees inside areas with a high density of rabbits. The pattern of Black Kite aggregation in our study area, where they breed in a "colony" with a population density among the highest recorded, can be explained, at least partially, by rabbit aggregation. Defense of feeding resources could help to explain the territorial behavior of Black Kites. Coloniality and feeding territoriality are not mutually exclusive.

scholarly journals Alarming population status of the Grizzled Giant Squirrel Ratufa macroura (Mammalia: Rodentia: Sciuridae) in Chinnar Wildlife Sanctuary, the Western Ghats, India

2018 ◽  
Vol 10 (10) ◽  
pp. 12350-12356
Author(s):  
Kiran Thomas ◽  
Paingamadathil Ommer Nameer
Keyword(s):  
Population Density ◽  
Western Ghats ◽  
Habitat Restoration ◽  
Population Estimation ◽  
Total Count ◽  
Population Status ◽  
Wildlife Sanctuary ◽  
Southern Western Ghats ◽  
The Western Ghats

This study was carried out to assess the population of Ratufa macroura in Chinnar Wildlife Sanctuary located in the Kerala part of the southern Western Ghats.  The population density of Ratufa macroura was estimated to be 15.26 squirrels/km2.  The total count method, however, gave the population range between 11 to 14 squirrels.  The current population estimation is about 78–85 % lesser than the previous population estimation of the Ratufa macroura carried out in 1993 and 2007 respectively, which is quite alarming.  The following conservation recommendations are suggested for the long-term conservation of R. macroura, which include habitat restoration to maintain the canopy contiguity and regulation of the pilgrimage and the tourism activities in and around the R. macroura habitat.  Urgent steps should also be taken to undertake studies on the genetics of R. macroura.  It is also suggested that systematic and scientific monitoring of the population of R. macroura be undertaken on a regular basis.

scholarly journals Population status, distribution and potential threats of the Blue Bull Boselaphus tragocamelus (Mammalia: Cetartiodactyla: Bovidae) along the Tinau River of Rupandehi District, Nepal

2016 ◽  
Vol 8 (14) ◽  
pp. 9638 ◽  
Author(s):  
Mohan Aryal ◽  
Saroj Panthi ◽  
Manoj Bhatta ◽  
Thakur Prasad Magrati ◽  
Ashok Kumar Shrestha ◽  
...  
Keyword(s):  
Population Density ◽  
Sex Ratio ◽  
Group Size ◽  
Habitat Destruction ◽  
Population Status ◽  
Average Population Density ◽  
Average Population ◽  
Average Group ◽  
The Status ◽  
Average Group Size

The status and conservation of the Blue Bull Boselaphus tragocamelus is becoming one of the prominent discourses of wildlife research.  The study was carried out along the Tinau River at Rupandehi District in western Nepal to ascertain the population status, distribution and potential threats to the Blue Bull.  The study was conducted along six transect lines in the forest.  A total of 40 Blue Bulls were recorded in different transects.  The average group size was five.  The average population density was 0.228 Blue Bulls per ha and the sex ratio was 1 male: 3 females.  The potential threats of the Blue Bull along the Tinau River were habitat destruction, overgrazing, conflict, flooding and accident.  

scholarly journals Population status and breeding ecology of Black Kite Milvus migrans (Boddaert, 1783) in Pokhara Valley, Nepal

Our Nature ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 46-53
Author(s):  
Namuna Khand ◽  
Shaligram Adhikaree ◽  
Milan Kharel ◽  
Ramji Gautam
Keyword(s):  
Breeding Success ◽  
Rank Correlation ◽  
Canopy Cover ◽  
Basic Knowledge ◽  
Average Height ◽  
Breeding Ecology ◽  
Population Status ◽  
Milvus Migrans ◽  
Black Kite ◽  
Pokhara Valley

The present study attempted to provide basic knowledge on population status, breeding success and general behaviours of Black kites in the Pokhara Valley of Nepal. Nesting and roosting sites were directly observed to count the bird in the fields during the study period from December 2019 to May 2020. A total of 308 individuals of Black kites were recorded. The highest and least number was recorded in February (n=67) and May (n=31) respectively. The breeding success was found to be 47.22%. The average height, girth and canopy cover of the nesting tree were found at 16.59m, 2.23m and 63.30% respectively. About 67% of nests observed were found active during the breeding season. The Spearman rank correlation coefficient showed a perfect positive relationship between the number of chicks and the number of the nest (r = 1). Bombax ceiba and Dalbergia sissoo were the trees on which the maximum number of nests were observed.

scholarly journals The Feeding Behavior of the Black Kite (Milvus migrans) in the Rubbish Dump of Rome

2008 ◽  
Vol 42 (2) ◽  
pp. 110-118 ◽  
Author(s):  
Umberto De Giacomo ◽  
Gaspare Guerrieri
Keyword(s):  
Feeding Behavior ◽  
Milvus Migrans ◽  
Black Kite ◽  
Rubbish Dump

scholarly journals Environmental factors affecting the wintering raptor community in Armenia, Southern Caucasus

2021 ◽  
Author(s):  
Gianpasquale Chiatante ◽  
Michele Panuccio
Keyword(s):  
General Pattern ◽  
Abundant Species ◽  
Theoretic Approach ◽  
Factors Affecting ◽  
Milvus Migrans ◽  
Gyps Fulvus ◽  
Black Kite ◽  
Southern Caucasus ◽  
And Migration ◽  
Information Theoretic Approach

AbstractThe species–habitat relationships can change during the year because of the seasonality of resources. Therefore, the investigation of habitat use by animals in each season plays a fundamental role in their conservation. The main aim of this research was to investigate the raptor community that spends the winter in Armenia, southern Caucasus, and to explore its relationship with environmental features, such as land use and topography. During January 2012, we collected data by carrying out 15 roadside counts along which we calculated three community parameters: the relative abundance, the species richness, and the species diversity. Then, we carried out a multiple linear regression with the Information-Theoretic Approach, to explain the relationship between the parameters and environmental variables. Besides, we computed a Canonical Correspondence Analysis (CCA) between the species and the environment around their observations. As a general pattern, the community was associated with permanent crops, maybe because of their heterogeneity, which in turn allows them to support higher densities of prey during the winter. The most abundant species was the Black Kite (Milvus migrans), followed by the Common Kestrel (Falco tinnunculus) and the Griffon Vulture (Gyps fulvus). To our knowledge, this is one of the first studies investigating the wintering raptor community in the Caucasus, with raptors generally studied in this area during the breeding season and migration.

scholarly journals Black Kite Milvus migrans in Slovenia – its distribution, phenology, breeding and habitat

Acrocephalus ◽  
2018 ◽  
Vol 39 (178-179) ◽  
pp. 71-83
Author(s):  
Dejan Bordjan
Keyword(s):  
Sea Level ◽  
Arable Land ◽  
Breeding Population ◽  
Water Bodies ◽  
Lower Percentage ◽  
Breeding Density ◽  
Breeding Sites ◽  
Milvus Migrans ◽  
Black Kite

Abstract Between 1984 and 2017, 1,388 Black Kites were recorded, mostly in lowlands with 70% of observations made at Dravsko polje. They were observed from sea level to around 1,600 m a.s.l. with an average elevation of 271 m a.s.l. The species was present in Slovenia from mid-March to early December with indistinct spring and autumn migrations. The highest number of observations was recorded in May. The Black Kite was observed in 71 out of 238 10x10 km grid squares in Slovenia (29.8%), with more observations around known breeding sites and at sites with higher observer effort. Both the number of observations and the number of probable and confirmed breeding pairs increased. In 2011–2018, 10 breeding pairs were found at 7 sites (3–7 per year). Additionally, 11 probable breeding pairs at 9 sites (0–6 pairs per year) were found. The breeding population in 2011–2018 is estimated at 10–21 pairs with an average breeding density of 0.3–0.9 breeding pairs per 100 km2. The highest density was recorded at Dravsko polje with 0.6–2.2 breeding pairs per 100 km2. If possible breeding (breeding attempts) were also taken into consideration, the estimate would be up to five breeding pairs higher. The species was recorded at known breeding sites in most years after the breeding was confirmed. Black Kites were observed closer to larger water bodies and to rubbish tips than expected by chance. More Black Kites were recorded in areas with a lower percentage of forest and arable land and a higher percentage of meadows, settlements and wetlands.

scholarly journals Population status of Heritiera fomes Buch.-Ham., a threatened species from Mahanadi Mangrove Wetland, India

2021 ◽  
Vol 13 (12) ◽  
pp. 19791-19798
Author(s):  
Sudam Charan Sahu ◽  
Manas Ranjan Mohanta ◽  
N.H. Ravindranath
Keyword(s):  
Natural Populations ◽  
P Value ◽  
Population Status ◽  
Mangrove Species ◽  
Sea Levels ◽  
Excoecaria Agallocha ◽  
Mangrove Wetland ◽  
Heritiera Fomes ◽  
The Status ◽  
Rising Sea Levels

Heritiera fomes Buch.-Ham. is assessed as an endangered mangrove species by IUCN, and information on population status is lacking. The present study assesses the status of H. fomes in Mahanadi Mangrove Wetland on the east coast of India. Three forest blocks were selected and sampled for this study. Among these, the mean girth at breast height (GBH) of H. fomes was the highest in Hetamundia (HD) forest block. GBH of H. fomes was inversely proportional to the cumulative disturbance index (R2= 0.7244, p value <0.005). The relative density was maximum for H. fomes (56%) at Bhitarkharnasi (BK), and for Excoecaria agallocha at Hetamundia (HD; 35%) & Kansaridia (KD; 54%), respectively. Excoecaria agallocha is a dominant species possibly impacting natural populations of H. fomes. Climate change and rising sea levels may also negatively affect the existence of this species. Therefore, appropriate strategies should be taken for conservation of this globally threatened mangrove species prior to its extinction.

scholarly journals The influence application of Information Technology and Competence on Employee Productivity through Job Satisfaction in the Civil Apparatus at Hasanuddin University

2020 ◽  
Vol 2 (3) ◽  
pp. 92-99
Author(s):  
Muhammad Erfan ◽  
Mahlia Muis ◽  
Andi Ratna Sari Dewi
Keyword(s):  
Job Satisfaction ◽  
Information Technology ◽  
Sampling Method ◽  
Work Productivity ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Measurement Scale ◽  
Employee Productivity ◽  
The Status ◽  
Minimum Number

This study aims to analyze (i) the effect of information technology variables on job satisfaction; (ii) the effect of competency variables on job satisfaction; (iii) the effect of information technology variables on work productivity; (iv) the effect of competency variables on work productivity; (v) the effect of job satisfaction variables on work productivity; (vi) the influence of information technology variables on work productivity through job satisfaction variables; and (vii) the effect of competency variables on work productivity through job satisfaction variables. The quantitative approach is used to test and analyze the factors that influence job satisfaction and work productivity. Research location at Hasanuddin University, Makassar City. The population in this study were Unhas employees with the status of ASN (State Civil Apparatus) as many as 935 people. The sampling method uses probability sampling with a simple random sampling technique. Withdrawing the number of samples using the Slovin formula, which produces 90 people as a minimum number. Data collection techniques using a questionnaire with a measurement scale used is a Likert scale with five components. Data analysis techniques in this study used path analysis. The results showed that information technology and competency variables significantly influence job satisfaction and work productivity. Information technology and competence have a significant effect on work productivity through job satisfaction variables. All hypotheses are accepted and supported by previous research.

scholarly journals Pertumbuhan dan status eksploitasi ikan sembilang (Plotosus canius) di perairan Kota Tanjung Pinang, Kepulauan Riau, Indonesia

2019 ◽  
Vol 3 (2) ◽  
pp. 65
Author(s):  
Rouli Verawati Gurning ◽  
Susiana Susiana ◽  
Ani Suryanti
Keyword(s):  
Regression Analysis ◽  
Sampling Method ◽  
Growth Parameters ◽  
Total Sample ◽  
Purposive Sampling ◽  
Fish Resources ◽  
Indian Catfish ◽  
The Status ◽  
Exploitation Status ◽  
Status Data

Research on the growth and exploitation status of indian catfish (Plotosus canius) is important in supporting the management of fish resources in the waters of Tanjungpinang City, Riau Islands. The study aims to determine the pattern of growth, growth parameters, and the status of indian catfish exploitation in the waters of Tanjungpinang City, Riau Islands Province. The study was conducted with a purposive sampling method of 3 stations with a total sample of 529 individual fish crosses. Analysis of growth and exploitation status data using FISAT II software and regression analysis using Excel 2017. This study resulted in a pattern of long relations and the weight of fish as a female and males both are negative allometric (faster increase in length than weight increase). The highest rate of exploitation of indian catfish is obtained from the data of 0.73 per year. This exploit value exceeds the optimum exploitation value of 0.5.

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