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The Asiatic lions and Indian tigers are not as inbred as previously reported by S.J. O'
Brien and group from USA and do not suffer from inbreeding depression. The Asiatic lions
exhibit a moderate genetic variability of about 26%. The Indian tigers also exhibit similar
levels of genetic variation. It is our hypothesis that low levels of genetic variability is
a characteristic of these species. The immune locus data reveals that the Asiatic lions
reveal abudant immune diversity. Analysis of reproductive parameters by Dr. Shivaji from
C.C.M.B. also does not reveal any significant differences in the incidence of sperm
abnormalities and circulating testosterone levels and compared to other wild animals.
These data collated provided evidence that Asiatic lions and Indian tigers do not suffer
from inbreeding depression. The analysis of 50 to 125 years old tiger skin does not reveal
any significant differences as compared to the modern population. This also supports our
hypothesis that low genetic variability is not due to any recent bottlenecks but has been
an inherent feature of these species.
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The graphical representation shows that Asiatic lions Madhuri
(1256), Chandra (1188), Hemlatha (1237) and Hadara from the Sakkarbaug zoo possess high
amounts of genetic variation. These animals can especially be used for further breeding to
improve the genetic diversity of the Asiatic lion population.
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Using micro satellite and mitochondrial sequence analysis, we can
confirm that the two Asiatic lions in the Bhubneswar zoo are pure Asiatic lions. All lions
from the Sakkarbaug zoo are also pure Asiatic lions as designated by the International
studbook. The lions in all other zoos were found to be hybrids.
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The micro satellite analysis at loci Fca 77 and Fca 126 is able to
differentiate pure Asiatic lions from hybrid lions. The Asiatic lions do not exhibit any
polymorphism at these loci, while hybrids exhibits extensive variability. This variability
could be due to the contribution of African alleles into the population. The mitochondrial
D loop sequence analysis also confirms this point. Asiatic lions do not exhibit any
variation, while the hybrids show extensive variability
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The Indian tigers possess 29% genetic variation. This level of
variability is comparable to any other free ranging carnivore. Using micro
satellites, detection
of hybrids between Siberian and Indian tigers was also achieved.
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A rapid and simplified method has been developed to extract DNA
for molecular analysis from fecal samples. Fecal samples are ideal for molecular analysis
because they are non-invasive and complications with tranquilizing animals for blood
collection are avoided. Using this technique a large scale study of wild animals is now
possible. Routine monitoring of populations for genetic variation will also become
significantly easier.
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3. "Semen Analysis and Cryopreservation of Spermatozoa of
Indian Wild Animals" Conducted by Center for Cellular & Molecular Biology(CCMB), Hyderabad |
The Project on Cryopreservation of spermatozoa in
wild animals is the first of its kind in India and it has yielded promising results that can
be used in efficient management of captive animals, particularly the fields. The significant
achievements of the project are as follows: |
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Protocols have been established for anaesthetics and electro-ejaculating
a wide range of animals such as lions, tigers, leopards, hyenas, jackals, bears, dears and
monkeys.
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Repeated anesthesia or electro-ejaculation did not cause harm to
the animals.
|
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TALP and HF-10 media were found to be the most suitable for
washing and processing of sperm for motility analysis and fertilising ability studies.
|
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TEST-yolk buffer was most suitable for cryopreserving the sperm at
the site of collection.
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Zone free hamster oocytes could be used to test the penetration
ability of the sperms both neat and freeze-thawed) of the wild animals.
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CASA could be utilised for fast and accurate diagnosis of the
quality of the spermatozoa of the wild animals.
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Finding based on spermatology and hormonal analysis,
indicate
that inbreeding depretion vis-a-vis usefulness of the animals for captive breeding is
not a matter of serious concern among the captive tigers, lions and leopards. These findings
are in agreement with the study carried out by Dr. Singh and his colleagues on the genetic
heterogeneity of the mega cates.
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4. "Seroepidemological Study of Infectious Disease in
Asiatic Lions." by Wildlife Insitute of India |
In an effort to understand the seroprevalance of
viral infections and their impact on the Asiatic lions, a seroepizootiological study of
cannine distemper virus(CDV), feline pervo virus(FPV), feline immunodeficiency virus(FIV)
and feline leukaemia virus(FeLV) was done in asiatic lions, hybrid lions and sympatric
leopard and domestic carnivores in zoological Park in Ahmedabad, Baroda, Junagarh< Rajkot
and the Gir National Park and Sanctuary and Devalia, Safari park. fifty Lions, including 13
hybrid lions, 24 leopards, 30 domestic dogs were tested by agar gel immunodiffusion tests
and dot- immunobinding assays for the serological evidence of above viruses. Antibodies to
CDV were detected in 94.59%(35/37) of Asiatic lions. 76.92%(10/13) of the hybrid lions.
91.66% (22/24) of the leopards. 70% (21/30) of the domestic cats and 66.83%(131/196) of the
domestic dogs. High seropositivity to CDV without overt symptoms of clinical disease
suggested the possibility of field to field transmission. 100% seroprevalence to FPV
antibodies was observed in both the domestic and exotic fields. Absence of clinical feline
panleukopedia-like symptoms, suggested that FPV appeared to manifest itself as an
in apparent
infection in these domestic and non-domestic fields. 80% of lions. 62.5% of leopards and 80%
of domestic cats sampled had high FPV antibody liters more than 1:160, suggesting repeated
infection with an endemic parvo like virus. There were no detectable levels of antibodies to
FIV or FeLV antigens in the lions, Leopards and domestic cats. The study found in captive
non-domestic felids, a high prevalence to CDV and FPV, two viruses , known to have caused
large scale mortalities in captive and free-living non-domestic felids worldwide. It is
suggested that movement, translocation or re-introduction of these seropositive felids may
be associated with disease risks and hence movement and translocation of these felids must be
done after subjecting theme to standard quarantine and disease screening protocols. Vaccination
may be considered using killed or other suitable viral vaccines, which have been proved to
be safe, effective and efficacious in endangered felids. |
5. LABORATORY FOR CONSERVATION OF ENDANGERED SPECIES |
Although our country is endowed with a tremendous
wealth of mega diversity in plant and animals wildlife, their very existence is at stake
owing to destruction of forest following industrialization, agriculture activities as well
as poaching of wildlife for reasons of sport and money. The problem becomes confounded with
the population growth as more forest area is brought under cultivation. Thus, the dwindling
of forests and destruction of habitats has led to fragmentation of wildlife and inbreeding
of animals. This results in reduction in their biodiversity, leading to
sterility and
extinction. It has been reported that approximately one hundred species in the world become
extinct every day. Extinction threatens 11% of birds, 25% of mammals and 34% of fish species.
Given current trends, many rare or endangered vertebrate species will soon be lost despite
efforts to maintain biodiversity via habitat and wildlife conservation. There is, therefore,
an urgent need to arrest this phenomenon and work out strategies to tackle these problems by
using innovative techniques. |
The Centre for Cellular and Molecular Biology (CCMB),
Hyderabad is setting up a laboratory for Conservation of Endangered Species (La-CONES) at
Attapur near Nehru Zoological park, Hyderabad, In partnership with the department of
Environment and Forests, A.P. and the Nehru Zoological Park. Piloted by Dr. Lalji Singh,
Director and Dr. S. Shivaji, Dy. Director, CCMB, this project has culminated as a result of
the initiative taken by the department of Biotechnology of the Ministry of Science and
Technology and the Central Zoo Authority of India of the Ministry of Environment and Forests,
Govt. of India, recognizing the need for preservation of genetic diversity and thus
conservation of wildlife in the country. The new laboratory (LaCONES) being set up has been
designed as a national programme to tackle this issue by biotechnological intervention for the
conservation as well as propagation of endangered species. |
This unique state-of the art laboratory is being set
up at an estimated total cost of Rs 94.8 million (the estimated cost for the for the first
phase being Rs. 57.5 million). The Government of AP has allotted five acres of land at Attapur.
LaCONES with the technical know-how and expertise would trouble-shoot events related to the
biology of the conservation of endangered species. Its objective include: |
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Monitoring of genetic variation by modern techniques, such as DNA
fingerprinting, So as to establish the degree of genetic variation in the species and to
establish identify family lineage which would contribute positively towards planned
in-house
breeding strategies and probably wildlife parks.
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Establishment of gene banks by Cryopreservation of semen,
eggs
and embryos of endangered species for use in future in under the conditions of inbreeding
partners behaviourally incompatible.
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Analysis of semen source to establish a database to identify
fertile males and select the best for breeding.
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Monitoring and establishment of the ovulatory cycle of females to
facilitate artificial insemination.
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Development of assisted reproduction technologies such as
intrauterine insemination, in Vitro Fertilization, intra-cytoplasm sperm injection,
embryo transfer, etc. So as to facilitate propagation of species under circumstances which
do not support normal mating and conception.
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Establishment of cell banks of endangered species to be used for
cloning under conditions when all other conventional methods of assisted reproductive
technologies fail.
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The resurrection of extinct and several endangered species by
cloning the frozen genetic material of the extinct species and oocytes of a closely related
species to be used as a surrogate mother.
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The CCMB scientists have also
standardized many
protocols for assisted reproduction such as semen collection by electro
ejaculation, semen
cryopreservation, semen profile evaluation in vitro fertilization and
radioimmunoassay of steroids, and hope to extend their expertise to achieve pregnancy by
intrauterine insemination and embryo transfer, so as to overcome difficulties owing to
failure of normal reproductive performance in wild animals. The scientists have already
developed a semen cryobank of tigers, lions and leopards and hope to create egg, embryo and
cell banks for future use. A Mobile Van with appropriate facilities including
Cryopreservation facility, sonography, computerized sperm motility analyzer. etc. has already
been procured to enable the scientists reach the habitats for collecting samples and to
attend on the animals for immidiate aid when necessary. |