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ON THE EDGE OF EXTINCTION - A - THE TIGER (Panthera tigris)

Matias Offline
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@peter   @Rishi


http://advances.sciencemag.org/content/1/5/e1400175 It is a very revealing study in which it has brought scientific support to practical conservation measures to the point of giving conservation value to thousands of captive hybrids (combining pragmatism and scientism). The two continental clades are "separated" by environmental criteria, notably the Amur tiger due to its unique ecosystemic nature. As the habitat fragments and the natural dispersion corridors no longer exist, saving the tigers serving the six continental subspecies would be a multi-pronged challenge, and the three subspecies further south, would certainly find in the near future, extinction in their natural habitat. Small genetic differences between the northern and southern clades may only be the result of evolutionary adaptations to different habitats. Two years ago I became aware of this study and was really impressed by the way scientists have positioned themselves in the face of the practical challenges that conservation of tigers have to face. No matter how new studies may question some connection between some subspecies, the actual and objective view that the genetic diversification found in both wild and captive tigers (including hybrids) will be fundamental in the future composition for tiger survival as a species, it is by yes, something to be celebrated in terms of methodology for the conservation of our remaining tigers.

Like the study led by Dr. Laura D. Bertola (Autosomal and mdDNA Markers Affirm the Distinctiveness of Lions in West and Central Africa), the constant presence of multidisciplinary professionals is providing a very positive association between the several elements that determine the conceptualization of a subspecies. The genetic bottleneck stemming from the Toba eruption makes the subspecies (tigers) issue a minor concern, since chromosomal diversity is naturally reduced due to a very recent existence. Issues related to skin size and pattern tend to be a direct product of environmental needs as a result of a slow adaptation process. Consequently, the tigers went through the natural process of genetic drift, thus having a random component in changing the genetic frequency, removing variety and gene viability. As we all know, both the bottleneck and the founding effect affected the health of the species. Allelic frequencies in the new population may be very different from that in the original population (before Toba), and even the population growing and developing to the present day, all specimens will have the same fixed allele, regardless of whether it is neutral, beneficial or deleterious . Despite the almost 80,000 years, genetic health is still in the process of recovery and gene pooling is necessary for the survival of the tiger.

When a subspecies is extinct, restoration ecologists replace the subspecies extinct by related species in a process called taxon replacement. This study that you published @peter, makes it unnecessary to implement such invasive procedures with unpredictable results; and giving conservation value to comprehensive in situ and ex situ methods is paramount to preserving a very selective species of behavior in the animal kingdom.

It is very good that in these two studies, geneticists do not distance themselves from field conservation and deal directly with the dangers our two biggest cats have to face. From when genetic science began to dictate the direction of conservation, reducing the importance of professionals in biology and zoology, which awaited a practical conciliation, aiming at a uniform and participatory framework among all professionals who will respond to future conservation policies.

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Messages In This Thread
RE: ON THE EDGE OF EXTINCTION - A - THE TIGER (Panthera tigris) - Matias - 08-21-2018, 11:15 PM
Demythologizing T16 - tigerluver - 04-12-2020, 11:44 AM
Tiger Data Bank - Apollo - 07-28-2014, 09:54 PM
RE: Tiger Data Bank - Apollo - 07-28-2014, 10:02 PM
RE: Tiger Data Bank - Apollo - 07-29-2014, 12:56 AM
RE: Tiger Data Bank - peter - 07-29-2014, 07:05 AM
Tiger recycling bin - Roflcopters - 09-04-2014, 01:36 AM
RE: Tiger recycling bin - Pckts - 09-04-2014, 02:22 AM
RE: Tiger recycling bin - Roflcopters - 09-05-2014, 01:01 AM
RE: Tiger Data Bank - Apollo - 11-15-2014, 10:07 PM
RE: Tiger Data Bank - Apollo - 11-15-2014, 10:57 PM
RE: Tiger Data Bank - Apollo - 11-15-2014, 11:33 PM
RE: Tiger Data Bank - Apollo - 02-19-2015, 11:25 PM
RE: Tiger Data Bank - GuateGojira - 02-23-2015, 11:36 AM
Status of tigers in India - Shardul - 12-20-2015, 03:23 PM
RE: Tiger Directory - Diamir2 - 10-03-2016, 04:27 AM
RE: Tiger Directory - peter - 10-03-2016, 06:22 AM
Genetics of all tiger subspecies - parvez - 07-15-2017, 01:08 PM
RE: Tiger Predation - peter - 11-11-2017, 08:08 AM
RE: Man-eaters - Wolverine - 12-03-2017, 11:30 AM
RE: Man-eaters - peter - 12-04-2017, 09:44 AM
RE: Tigers of Central India - Wolverine - 04-13-2018, 01:17 AM
RE: Tigers of Central India - qstxyz - 04-13-2018, 08:34 PM
RE: Size comparisons - peter - 07-16-2019, 05:28 AM
RE: Amur Tigers - peter - 05-20-2021, 07:13 AM
RE: Amur Tigers - Nyers - 05-21-2021, 08:02 PM
RE: Amur Tigers - peter - 05-22-2021, 08:09 AM
RE: Amur Tigers - GuateGojira - 04-06-2022, 12:59 AM
RE: Amur Tigers - tigerluver - 04-06-2022, 01:08 AM
RE: Amur Tigers - tigerluver - 04-06-2022, 09:08 AM
RE: Amur Tigers - tigerluver - 04-06-2022, 11:30 PM
RE: Amur Tigers - peter - 04-08-2022, 07:27 AM



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