Sri Lankan Elephant Distribution and Conservation Status

Sri Lankan elephants are found in the wild only in Sri Lanka, a small island nation in the Indian Ocean. They inhabit a variety of habitats, including forests, grasslands, and scrublands.

Sri Lankan elephants have a unique genetic makeup, distinct from their Asian elephant cousins. This genetic difference is thought to have occurred due to the island's geographical isolation.

Their population is estimated to be around 3,000-4,000 individuals, making them one of the most endangered elephant subspecies.

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The Sri Lankan elephant is a massive creature, with a shoulder height of between 2 and 3.5 m (6 ft 7 in and 11 ft 6 in) and weighing between 2,000 and 5,500 kg (4,400 and 12,100 lb).

Its skin colour is darker than other subspecies, with larger and more distinct patches of depigmentation on the ears, face, trunk, and belly.

Females are generally smaller than males.

Only 7% of males bear tusks that grow up to about 1.8 m (6 ft) and weigh up to 35 kg (77 lb).

Males without tusks are often referred to as makhna, and this accounts for 90% of tuskless males.

Sri Lankan elephants are mostly found in the lowlands of the dry zone, where they are still fairly widespread in various parts of the country.

They can be spotted in north, south, east, north-western, north-central, and south-eastern Sri Lanka, with a small remnant population existing in the Peak Wilderness Sanctuary.

Protected areas, such as Wilpattu and Ruhuna National Parks, are essential for the elephants' survival, but many areas are less than 50 km in extent and not large enough to encompass their entire home ranges.

About 65% of the elephant's range extends outside protected areas, highlighting the need for conservation efforts beyond these designated areas.

The Mahaweli Development Area has linked protected areas, resulting in an overall area of 1,172 km of contiguous habitat for elephants.

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Sri Lankan elephants can be found in the lowlands of the dry zone, where they are still fairly widespread in north, south, east, north-western, north-central, and south-eastern Sri Lanka.

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About 65% of their range extends outside protected areas, making conservation efforts challenging.

They are absent from the wet zone of the country, which suggests that they prefer drier habitats.

A small remnant population exists in the Peak Wilderness Sanctuary, a testament to the importance of protecting remaining habitats.

Protected areas like Wilpattu and Ruhuna National Parks are essential for elephant conservation, but many other areas are less than 1,000 km in extent.

The Mahaweli Development Area has linked several protected areas, resulting in an overall area of 1,172 km of contiguous habitat for elephants.

This habitat link is crucial for the elephants' survival, as it allows them to roam and forage freely.

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The distribution of elephant sampling localities throughout Sri Lanka is shown in Fig 1.

The circles in Fig 1 are proportional to the ratio of elephants sampled.

The number and location of samples used for the ddRAD analysis are given in S1 Table.

Elephants were sampled at various locations throughout Sri Lanka, indicating a wide distribution of the species.

The sampling locations were chosen to represent the diversity of elephant habitats in Sri Lanka.

DNA samples from these locations were used for further analysis, including ddRAD sequencing.

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Formerly, Sri Lankan elephants roamed from sea level to the highest mountain ranges, occupying a wide range of habitats including dry zones, lowland wet zones, and cold damp montane forests.

They were so plentiful that their destruction was encouraged by the government, and rewards were paid for any that was killed until 1830.

The British rule saw many bull elephants killed by trophy hunters, with one British army major credited with having shot over 1,500 elephants.

Between 1829 and 1855, more than 6,000 elephants were captured and shot under order of the colonial British Empire.

The area now known as Ruhuna National Park was once the Resident Sportsmen's Shooting Reserve, reserved for the sporting pleasure of British residents in the country.

By the turn of the 20th century, elephants were still distributed over much of the island.

The construction of mega reservoirs in the dry zone for irrigated agriculture and the rehabilitation of ancient irrigation systems severely fragmented elephant habitat in the dry zone.

The Sri Lankan elephant population has been on a rollercoaster ride over the years, with numbers fluctuating wildly. By the early 20th century, the population had dwindled to 10,000.

In 1969, there were between 1,745 and 2,455 individuals, and by 1987, this number had increased to between 2,500 and 3,435. However, by June 1993, the population had dropped to 1,967, fragmented into five regions.

The conservation efforts in Sri Lanka aim to protect as many viable populations as possible in suitable habitats. This means protecting elephants both within protected areas and outside them, where the land can support it.

Here are some of the protected areas in Sri Lanka where elephants can be found: Name of the parkSize in sq.kmNumber of elephantsWilpattu1,316.9100–150Ruhuna (Yala)1,267.8300–350Gal Oya629.4150–200

The elephant conservation strategy also includes efforts to breed elephants in captivity, such as at the Pinnawala Elephant Orphanage in Kegalle, where nearly 70 elephants live and are cared for.

The population trend of wild elephants in Sri Lanka is a fascinating and complex topic. The estimated population size has fluctuated significantly over the years, ranging from a high of 19,500 in the early 19th century to a low of 1,967 in June 1993.

In 1969, the estimated population size was between 1,745 and 2,455 individuals. By 1987, this number had increased to between 2,500 and 3,435.

A significant decline was observed in the early 20th century, with the population size estimated to be around 10,000. This trend continued, with the population size estimated to be between 7,000 and 8,000 in around 1920.

The population size has shown a steady increase since the 1990s, with an estimated 3,150 individuals in 2006 and 2,900–3,000 in 2007. By 2011, the population size had increased to 5,879, based on counting elephants at water holes in the dry season.

Here is a breakdown of the estimated population sizes over the years:

The conservation of Sri Lankan elephants is a top priority, and it's great to see that efforts are being made to protect these magnificent creatures. The Department of Wildlife Conservation has a clear strategy in place to conserve as many viable populations as possible in suitable habitats.

Elephas maximus, the Sri Lankan elephant, is listed on CITES Appendix I, which means it's protected from international trade. This is a crucial step in ensuring the species' survival.

The conservation strategy focuses on protecting elephants both within protected areas and in the wild, rather than just confining them to national parks. This approach allows for a more natural distribution of the population.

In the Pinnawala Elephant Orphanage in Kegalle, injured elephants receive treatment, and orphaned baby elephants are cared for. This centre is home to nearly 70 elephants, and captive breeding is also taking place.

The Udawalawe Elephant Transit Centre is another important rehabilitation centre, where orphaned elephant calves are kept until they can be released into the wild.

Here are some key protected areas for elephants in Sri Lanka:

Elephants in Sri Lanka's northwestern region have been observed feeding on a wide variety of plant species, totaling 116 different types belonging to 35 families.

More than half of the plants they feed on are non-tree species, such as shrubs, herbs, grass, or climbers.

In this region, the family Leguminosae accounts for over 25% of the plant species, and the family of true grasses accounts for 19%.

These elephants tend to feed on leftover crop plants in fallow chenas, rather than solely raiding crops.

Elephants are classified as megaherbivores and consume up to 150 kg (330 lb) of plant matter per day.

They feed on a wide variety of food plants, and in Sri Lanka's northwestern region, they were observed eating 116 plant species belonging to 35 families.

More than half of the plants they eat are non-tree species, such as shrubs, herbs, grasses, or climbers. Over 25% of the plant species they consume belong to the family Leguminosae.

Juvenile elephants tend to feed predominantly on grass species, and females and calves often form small, loosely associated social groups.

However, at some locations like Minneriya National Park, hundreds of individuals aggregate during the dry season, suggesting that grouping behavior is flexible and depends on season and place.

Asian elephants, including the Sri Lankan subspecies, communicate using visual, acoustic, and chemical signals. They make at least fourteen different vocal and acoustic signals, including some low-frequency calls that contain infrasonic frequencies.

The Asian elephant species has a relatively low nucleotide diversity, with a nucleotide variability (pi) of less than 0.015 in most regions of the mitochondrial genome.

The Sri Lankan elephant's mitochondrial genome was found to have a high nucleotide polymorphism, particularly in the ND1 gene.

The estimated coalescence time of the α and β clades in Asian elephants is around 1.2 million years, while the β clade is estimated to have coalesced about 0.4 million years ago.

The Sri Lanka elephant is one of the most recently diverged lineages in the Asian elephant species, estimated to be around 0.1 million years old.

Mitochondrial genome analysis suggests that the Asian elephant species has a relatively recent common ancestor, with a divergence time of around 5.9 million years.

The mitochondrial genome of the Sri Lankan elephant was found to be very similar to that of the E. maximus, with a gene order identical to the E. maximus mitogenome.

The estimated divergence time of the elephant specimen was found to be around 6.25 million years, consistent with previous estimates.

The mitochondrial genome of the Sri Lankan elephant was found to have a high GC content of 38.7%.

The estimated coalescence time of the Sri Lanka elephant is around 0.1 million years, which suggests that it is one of the most recently diverged lineages in the Asian elephant species.

Haplotype diversity and SNP counts are crucial in understanding the genetic makeup of Sri Lankan elephants. They can be used to analyze the population structure of these majestic creatures.

The number of SNPs identified in the study is 50,490, which shows a similar variation with haplotype diversity. Haplotype diversity is a measure of genetic variation within a population, and higher haplotype diversity means higher polymorphism.

The identified regions are between 250-450bp in length, which can be easily amplified with PCR. This makes it easier to study and analyze the genetic data.

The Sri Lankan elephant has been a revered and integral part of Sri Lankan culture for over two thousand years. It's no surprise, given its majestic presence and gentle nature.

In fact, the elephant has been a common element in Sinhalese and Sri Lankan Tamil heraldry for over two thousand years. This cultural symbiosis has continued to exist between the elephant and humans for centuries – no religious procession was complete without its retinue of elephants.

Many large Buddhist temples and Hindu temples in Sri Lanka had their own elephants, highlighting the elephant's significance in Sri Lankan culture. The annual Kandy Esala Perahera, a major cultural pageant, features elephants prominently.

The Sri Lankan elephant has also been used as a symbol of status and prestige among Sinhalese, with ownership of elephants being a highly sought-after privilege. This cultural significance is evident in the use of the Sri Lankan elephant in the coat of arms and flag of Ceylon Government from 1875 to 1948.

Here are some key institutions that still use the Sri Lankan elephant in their coat of arms and insignia:

The cultural significance of the Sri Lankan elephant is undeniable, and its use in various aspects of Sri Lankan life continues to this day.

Sri Lanka is home to a large population of Asian elephants, and there are several national parks and reserves where you can see them in their natural habitat.

Yala National Park is one of the best places to see Sri Lanka's elephants, with a permanent residence of around 300 elephants.

You can visit Yala all year round, except for during the rainy season which occurs in the south around September to October.

Kaudulla National Park is another excellent place to see Sri Lanka's elephants, with hundreds of them sighted here every year.

The dry season from August to December is the best time to see elephants at Kaudulla, as they emerge to head for the larger watering holes.

Minneriya National Park is famous for what is known locally as 'The Gathering', where hundreds of elephants collect on the banks of the lakes to drink during the dry season.

This gathering occurs from July until around November, making Minneriya one of the best places to see elephants in Sri Lanka.

Udawalawe National Park is a smaller reserve, but it still has a population of up to 250 permanent residents and is a great place to see elephants year-round.

If you're visiting between December and June, or if you're in the south, Udawalawe is definitely the best place to see Sri Lanka's elephants.

Elephant populations are higher in north Sri Lanka, but the south has smaller populations in higher density areas, making it easier to spot them.

If you're visiting during the dry season in the north (July to November), visiting parks in the north will give you the best chances of seeing wild elephants in Sri Lanka.

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Sri Lankan elephant watching has become super popular, but it's essential to be cautious and respect the animals' space.

Elephant safaris in Sri Lanka can be a great way to support conservation efforts and fund natural habitats, but not all tour groups follow the rules.

The country has strict guidelines about distance and disruption to elephants, but some tour groups ignore these regulations.

Overcrowding of vehicles can cut off elephant movements, disrupt their behavior, and cause stress.

Make sure to invest in a reputable tour operator that respects the guidelines and natural behavior of the elephants.

If a tour operator promises close-up views, it's best to avoid them.

Scientific Research plays a vital role in understanding and conserving Sri Lanka's elephant population.

The Udawalawe Elephant Research Project is a prime example of this, providing crucial insights for wildlife managers and decision-makers.

Monitoring activities, such as tracking individual elephants, have shown that this comprehensive approach is essential for developing effective conservation strategies and management plans.

In Udawalawe National Park, scientists are working hard to monitor the elephant population. Udawalawe Elephant Research Project plays a pivotal role in this effort.

The project focuses on tracking individual elephants to understand their movements and behaviors. This approach provides crucial insights for wildlife managers and decision-makers.

Udawalawe National Park is located in the southern regions of Sri Lanka, near the capital city of Colombo. It's a popular destination for visitors looking to see elephants in their natural habitat.

The park is home to around 250 permanent resident elephants, making it an ideal place to study these amazing creatures. Visitors can spot elephants here all year round, but the dry season from May to September offers the best chances of seeing them.

DNA Sample Prep is a crucial step in any scientific research project. Twenty-four fresh whole blood samples were collected directly from both domestic and wild elephants with known origin and morphology.

These samples were collected from elephants after getting written informed consent from the Pinnawala Elephant Orphanage, following the ethical clearance guidelines. The animals included both sexes and tuskers.

All the elephants are unrelated and born in widely distributed areas. This is evident from Fig 1, which likely illustrates the geographic distribution of the elephants.

Blood was collected from elephants in a way that ensures the integrity of the DNA samples. This is essential for accurate DNA extraction and further analysis.

The process of de novo assembly and annotation of the Elephas maximus mitochondrial genome is a complex one. To accomplish this, researchers used the Mitoz v2.3 program.

A sufficient amount of data is crucial for this process, and 3-5GB of data is recommended by Mitoz. The researchers used the BBMap reformat.sh tool to extract ~5GB amount of reads from the whole genome dataset.

However, the de novo assembler wasn't successful in reconstructing the D-loop region of the circular genome. This region is complex and repetitive, making it difficult to resolve with short reads.

To address this issue, the researchers mapped the whole-genome sequencing reads to the D-loop region of the Elephas maximus mitochondrial genome (NC_005129) using BWA MEM v0.7.17. This allowed them to generate a consensus sequence that was then merged into the assembly.

After manual curation of annotations, the researchers used OrganellarGenomeDRAW v1.3.1 to visualize the assembled genome.

Let's take a closer look at Fig 4, the PCA of sampled individuals. This graph shows the principal component analysis of the sampled individuals.

The variation explained by each principal component is depicted inside the axes brackets. This means that each axis represents a certain amount of variation in the data, and the numbers inside the brackets tell us how much of the variation is explained by each axis.

The PCA analysis helps us understand the genetic structure of the sampled individuals. By examining the graph, we can see how the individuals are grouped together based on their genetic characteristics.

Table 3 shows the STRUCTURE HARVESTER output in the STRUCTURE analysis, which provides additional information about the genetic clusters of the sampled individuals.

The death toll of Sri Lankan elephants is a pressing concern.

Human-elephant conflict is a significant factor, with over 300 human deaths and 400 elephant deaths reported in 2019 alone.

The main reason for this conflict is the competition for land, as elephants are being pushed out of their natural habitats by agricultural expansion and urbanization.

In Sri Lanka, elephants are considered a vulnerable species, with their population declining due to habitat loss and fragmentation.

The Sri Lankan elephant is a majestic creature. They are native to Sri Lanka and are the largest land animal in the country.

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Sri Lankan elephants have a distinctive physical appearance, with males reaching shoulder heights of up to 3.5 meters and weighing up to 5,000 kilograms.

Their large ears help them to regulate their body temperature in the hot tropical climate of Sri Lanka. These elephants also have a highly developed brain and are considered to be one of the most intelligent animals in the world.

In the wild, Sri Lankan elephants live in a matriarchal society, led by the oldest female. They are herbivores and feed on a variety of plants, including grasses, leaves, and fruits.

Sri Lankan elephants have been listed as Endangered on the IUCN Red List since 1986, due to habitat loss and poaching.