scholarly journals How Long is Indian Coastline?

2021 ◽  
Author(s):  
Ravi Prakash Srivast ◽  
V. P. Dimri
Keyword(s):  
Fixed Number ◽  
Nicobar Island ◽  
Small Islands ◽  
Indian Coast ◽  
Andaman And Nicobar Islands ◽  
Fractal Method ◽  
Optimum Scale ◽  
Self Similar ◽  
Nicobar Islands ◽  
Island Coast

Abstract Coastline measurements have no explicit length if they are geometrically self-similar. It is well known that length of self-similar geometrical objects is scale dependent, and hence it is not a fixed number, rather depends on the scale used to measure it. We present a definitive approach based on a fractal method to measure the coastline of India. We propose a method to define optimum scale length, that could be used to measure the coastline. Using our method, the mainland coast measures 7567 km. There are four big inhabited islands in Andaman (North, Middle, South and Little Andaman) which accounts for 687 km of island coast, and Great Nicobar Island has 195 km of coast around it, thus coastal length of inhabited islands is 882 km. Thus the total coast length of India including major 5 inhabited islands from Andaman-Nicobar group of islands is 8391 km. There are several other small islands in Andaman-Nicobar group of islands, we observed 26 of them significant in terms of their size. Indian coast length becomes 9060 km if we account for above mentioned 26 Andaman and Nicobar Islands. According to one of the Wiki articles, there are 572 islands in Andaman-Nicobar group of islands, but many of them are very small and insignificant. This is first ever scientific study about the Indian coast length, which has global significance due to strategic and climate related coastline alterations such as sea level rise due to global warming.

scholarly journals Diversity, distribution and status of bats on the Andaman and Nicobar Islands, India

Oryx ◽  
2014 ◽  
Vol 48 (2) ◽  
pp. 204-212 ◽  
Author(s):  
Bandana Aul ◽  
P.J.J. Bates ◽  
D.L. Harrison ◽  
G. Marimuthu
Keyword(s):  
Local Communities ◽  
Anthropogenic Pressure ◽  
Nicobar Island ◽  
Andaman Islands ◽  
Andaman And Nicobar Islands ◽  
Secondary Sources ◽  
Community Initiative ◽  
Nicobar Islands ◽  
Cynopterus Brachyotis ◽  
Flying Fox

AbstractInformation on the bat fauna of the Andaman and Nicobar Islands was limited previously to the results of sporadic surveys, with no specific focus on the habitats or distribution of the species. We carried out the first extensive survey of the Andaman and Nicobar Islands during 2003–2006, covering 40 islands. Our objective was to map the bat species, their habitats and distribution. This resulted in identification of 25 bat species representing 13 genera, location of > 300 roosts and validation of previously recorded species. Notable findings included the rediscovery of the endemic Nicobar flying fox Pteropus faunulus after a century and its extinction from the type locality on Car Nicobar Island, the sighting of an albino Hipposideros diadema nicobarensis from Katchal Island, and the first records of Rhinolophus yunanensis, Murina cyclotis and Hipposideros larvatus from the Andaman Islands, and Taphozous melanopogon, Murina cyclotis, Pipistrellus spp., Myotis horsfieldii dryas and Cynopterus brachyotis from the Nicobar Islands. Threats to the bat fauna appear to be primarily roost disturbance and hunting for sport. Anthropogenic pressure on species of Pteropus is high as hunting occurs throughout the year. Secondary sources and our field observations confirmed the decline of Pteropus in several islands as a result of hunting and alteration to habitats. We introduced a community initiative to monitor and protect roosts and foraging sites close to settlements in the Nicobar Islands. Priorities identified for conservation of the bat fauna of the archipelagos are mitigation of threats to flying foxes and cave dwelling bats, initiation of research on endemic bat species such as P. faunulus, and a voluntary ban by local communities on hunting in specific areas and seasons.

scholarly journals Protected areas and benthic characteristics influence the distribution of the Vulnerable bumphead parrotfish Bolbometopon muricatum in the Andaman and Nicobar Islands, India

Oryx ◽  
2019 ◽  
Vol 54 (4) ◽  
pp. 564-571
Author(s):  
Vardhan Patankar ◽  
Tanmay Wagh ◽  
Aniruddha Marathe
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Coral Cover ◽  
Conservation Status ◽  
Live Coral ◽  
Nicobar Island ◽  
Andaman And Nicobar Islands ◽  
Fishery Resource ◽  
Nicobar Islands ◽  
Bolbometopon Muricatum

AbstractThe Vulnerable bumphead parrotfish Bolbometopon muricatum, a highly prized fishery resource worldwide, has experienced population declines throughout its geographical range. There is limited knowledge of the distribution and abundance of, and threats to, this fish in Indian waters, particularly for the Andaman and Nicobar Islands. To assess the species’ distribution and conservation status we conducted underwater surveys across 75 sites around 51 islands and interviewed 99 fishers across the Andaman and Nicobar archipelago. We recorded a total of 59 individual B. muricatum across nine sites from the northernmost island in the Andamans (Landfall Island) to the southernmost island in the Nicobars (Great Nicobar Island). Interviews revealed that most fishers (100% in Nicobar, 94% in Middle Andaman, 62% in South Andaman) had seen B. muricatum, and knowledge of the species is highest amongst spearfishers. Generalized linear models indicated that presence of marine protected areas and high live coral cover influenced the abundance and distribution of B. muricatum. The species' density seems to be naturally low in the archipelago. We discuss our findings in the light of protecting rare and threatened species, and recommend strengthening the existing marine protected areas in these islands.

Aristolochia gurinderii (Aristolochiaceae): a new species from Great Nicobar Island, India

Phytotaxa ◽  
2014 ◽  
Vol 172 (2) ◽  
pp. 117 ◽  
Author(s):  
K Ravikumar ◽  
Umeshkumar L Tiwari ◽  
N Balachandran
Keyword(s):  
New Species ◽  
Nicobar Island ◽  
Andaman And Nicobar Islands ◽  
Nicobar Islands ◽  
A New Species

Aristolochia gurinderiidescribed here as a new species, was collected from North-South Road, Campbell Bay, Great Nicobar Island (Andaman and Nicobar Islands), India.  Stem woody with corky fissured bark; lamina deltoid or hastate; cauliflorous inflorescences in scorpioid cyme up to 55 cm long, small size of flowers; seeds winged with distinctive ridge at the center are the distinguishable characters from its allied species A. jackii Steudel. With a detailed description, illustration, photo plates are provided.

scholarly journals Ethnomedicinal Knowledge among Nicobarese Tribes of Car Nicobar Island of Andaman and Nicobar Islands, India

2020 ◽  
Vol 5 (1) ◽  
pp. 13-24
Author(s):  
Narayanam Srikanth ◽  
Chinmay Rath ◽  
Bonthu Susmitha ◽  
Ashish K Tripathi ◽  
Santosh S Mane ◽  
...  
Keyword(s):  
Nicobar Island ◽  
Andaman And Nicobar Islands ◽  
Nicobar Islands ◽  
Ethnomedicinal Knowledge

Orthetrum erythronigrum sp. nov. (Odonata: Libellulidae) from the Great Nicobar Island, India

Zootaxa ◽  
2020 ◽  
Vol 4869 (2) ◽  
pp. 242-250
Author(s):  
K.A. SUBRAMANIAN ◽  
R. BABU ◽  
V.J. KALKMAN
Keyword(s):  
New Species ◽  
Biosphere Reserve ◽  
Mature Male ◽  
Nicobar Island ◽  
Field Observations ◽  
Andaman And Nicobar Islands ◽  
Male And Female ◽  
Large Size ◽  
Nicobar Islands

The male and female of Orthetrum erythronigrum sp. nov. are described from Great Nicobar Island and are believed to be endemic to the Nicobar Islands archipelago (holotype ♂, India, Andaman and Nicobar Islands, Great Nicobar Island, Great Nicobar Biosphere Reserve, N 6.99067, E 93.871363; 01-xii-2018; deposited in ZSI, SRC, Chennai, India). The male of this new species is easily distinguished from other known Orthetrum species by its black abdomen with contrasting crimson belly. Female is distinguished by its large size, the black non-metallic head, black thorax and the red abdomen with a distinct black pattern. Based on field observations and photographs, notes on the life colouration of the mature male and information on the distribution and habitat of this Great Nicobar endemic are provided. 

scholarly journals Assessment of coastal erosion along Indian coast on 1 : 25, 000 scaleusing satellite data

2014 ◽  
Vol XL-8 ◽  
pp. 119-125 ◽  
Author(s):  
A. S. Rajawat ◽  
H. B. Chauhan ◽  
R. Ratheesh ◽  
S. Rhode ◽  
R. J. Bhanderi ◽  
...  
Keyword(s):  
Satellite Data ◽  
Tamil Nadu ◽  
National Level ◽  
Shoreline Change ◽  
Time Frame ◽  
Nicobar Island ◽  
Indian Coast ◽  
Anthropogenic Pressures ◽  
Nicobar Islands ◽  
Gis Environment

The long stretch of coastline on the either side of Indian peninsula is subjected to varied coastal processes and anthropogenic pressures, which makes the coast vulnerable to erosion. There is no systematic inventory of shoreline changes occurring along the entire Indian coast on 1:25, 000 scale, which is required for planning measures to be taken up for protecting the coast at national level. It is in this context that shoreline change mapping on 1:25, 000 scale for the entire Indian coast based on multidate satellite data in GIS environment has been carried out for 1989–91 and 2004–06 time frame. The paper discusses salient observations and results from the shoreline change inventory. The results show that 3829 km (45.5 %) of the coast is under erosion, 3004 km (35.7 %) of the coast is getting accreted, while 1581 km (18.8 %) of the coast is more or less stable in nature. Highest percentage of the shoreline under erosion is in Nicobar Islands (88.7 %), while percentage of accreting coastline is highest for Tamil Nadu (62.3 %) and the state of Goa has highest percentage of stable shoreline (52.4 %). The analysis shows that the Indian coast has lost a net area of about 73 sq km during 1989–91 and 2004–06 time frame. In Tamilnadu, a net area of about 25.45 sq km have increased due to accretion, while along Nicobar Island about 93.95 sq km is lost due to erosion. The inventory has been used to prepare “Shoreline Change Atlas of the Indian Coast”, brought out as Six Volumes for the entire Indian coast.

Comparative Study of Psychiatric Morbidity among the Displaced and Non-Displaced Populations in the Andaman and Nicobar Islands following the Tsunami

2008 ◽  
Vol 23 (1) ◽  
pp. 29-34 ◽  
Author(s):  
Suresh Bada Math ◽  
John P. John ◽  
Satish Chandra Girimaji ◽  
Vivek Benegal ◽  
Biju Sunny ◽  
...  
Keyword(s):  
Psychiatric Morbidity ◽  
Religious Faith ◽  
Adjustment Disorder ◽  
Community Leaders ◽  
Altruistic Behavior ◽  
Nicobar Island ◽  
Post Traumatic Stress ◽  
Andaman And Nicobar Islands ◽  
Displaced Populations ◽  
Nicobar Islands

AbstractObjective:The objective of this study was to compare the psychiatric morbidity between the displaced and non-displaced populations of the Andaman and Nicobar Islands during the first three months following the 2004 earthquake and tsunami.Methods:The study was conducted at the 74 relief camps in the Andaman and Nicobar Islands. Port Blair had 12 camps, which provided shelter to 4,684 displaced survivors. There were 62 camps on Car-Nicobar Island, which provided shelter to approximately 8,100 survivors who continued to stay in their habitat (non-displaced population). The study sample included all of the survivors who sought mental health assistance inside the camp. A psychiatrist diagnosed the patients using the ICD-10 criteria.Results:Psychiatric morbidity was 5.2% in the displaced population and 2.8% in the non-displaced population. The overall psychiatric morbidity was 3.7%. The displaced survivors had significantly higher psychiatric morbidity than did the non-displaced population.The disorders included panic disorder, anxiety disorders not otherwise specified, and somatic complaints. The existence of an adjustment disorder was significantly higher in the non-displaced survivors. Depression and post-traumatic stress disorder (PTSD) were distributed equally in both groups.Conclusions:Psychiatric morbidity was found to be highest in the displaced population. However, the incidence of depression and PTSD were distributed equally in both groups. Involvement of community leaders and survivors in shared decision-making processes and culturally acceptable interventions improved the community participation. Cohesive community, family systems, social support, altruistic behavior of the community leaders, and religious faith and spirituality were factors that helped survivors cope during the early phase of the disaster.

Sighting records of Pied Imperial Pigeon (Ducula bicolor, Scopoli, 1786) and Nicobar Green Imperial Pigeon (Ducula aenea nicobarica, Pelzeln, 1865) from Great Nicobar Island of Andaman Nicobar Islands, India

2016 ◽  
Vol 5 (07) ◽  
pp. 4691
Author(s):  
Jai Bahadur Singh Kachhawa ◽  
Dinesh Meena ◽  
Vivek Sharma ◽  
Divaker Yadav ◽  
Ashish Kumar Jangid
Keyword(s):  
Individual Species ◽  
Nicobar Island ◽  
Nicobar Islands

Present manuscript is the sighting records of two less known individual species of Columbidae family i.e. Pied Imperial Pigeon (Ducula bicolor, Scopoli 1786) and Nicobar Green Imperial Pigeon (Ducula aenea nicobarica, Pelzeln, 1865) from Great Nicobar Island of Andaman Nicobar Islands. 

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