If you will visit the desert plain near foothills of Nuratau Range in Uzbekistan in spring – from mid-March – until late May, more likely that you will be able to spot several individuals of Central Asian Tortoise, grazing on juicy spring ephemeral plants and cereals. This turtle has the huge periods of “hibernation”, hiding for harsh time of summer heat and winter cold in deep holes, and appearing again only next spring for the short period of breeding time. It is possible to distinguish “good” and “bad” years on the rings of the tortoise carapace. After “good” years, abundant with rains and juicy vegetation, the rings are wide and prominent; after “bad” years the rings are slightly distinguished. It is possible to identify the age of individuals counting yearly rings. Surprisingly, this tortoise could adapt to the extremely difficult conditions of cold Central Asian deserts and evolve for millennia, occupying all appropriate plain desert landscapes. This tortoise does not need too much that to survive in the modern world: habitats that are not disturbed and mild anthropogenic pressure. Many desert habitats are still virgin and cannot be transformed into agricultural lands due to lack of precipitation and water. However, anthropogenic pressure is a more serious threat…   

Central Asian Tortoise (Agrionemys horsfeldii), the species widely distributed in Central Asia in the past, becomes more and more threatened in last decades due to species exploitation in the international trade, change and transformation of habitats, development of road network in the desert regions and other anthropogenic impacts. The species also called Horsfield’s Tortoise, Russian Steppe or Afghan Tortoise. This is an only tortoise species, which is an endemic of Central Asia. Species range and abundances significantly reduced last decades in the result of human development and transformation of virgin desert lands into irrigated crop production fields and due to international trade for pet markets. Central Asian Tortoise is included in IUCN Red List as a Vulnerable species (VU), however, its population status is unknown and not much is known about population trends (IUCN, 2021). The species is included in CITEC Appendix II and covered by agreement about international trade of wild plants and animals.

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Central Asian Tortoise occurs in desert plains of Central Asia inhabiting sandy, gravelly sandy and loamy plains with sparse desert vegetation. It also can be found in stony-loamy foothills on elevations up to 800 m above sea level. Although there are known its findings on altitudes up to 1,600 m above sea level. But feeding conditions are better in the desert plains, therefore the population densities of tortoises in mountains are very low. Habitats with optimal conditions, providing a stable food base and reliable shelters, are represented by loess foothills and piedmont plains with ephemeral or wormwood-ephemeral vegetation, usually, below 800 m above sea level (Bondarenko & Peregontsev, 2017). According to assessment, conducted in Uzbekistan, the current range of Central Asian Tortoise in Uzbekistan occupies around 300,00 square kilometres. The population density varies significantly ranging from 0.1 – 0.9 individuals per hectare (rare) to 1.0 -9.9 individuals per hectare (common) and > 10.0 individuals per hectare (abundant).

Agricultural development of desert areas in Central Asia that took place in 1950-1980s led to expiration of this species within developed lands. Because tortoises ate seedlings of crops and green vegetation on agricultural fields. In some developed regions farmers collected and killed 2,000 – 3,000 tortoises a day.  At present, the Central Asia tortoise is extirpated from the developed regions. In some regions of Central Asia, for example, in Fergana Valley, the species is completely extinct. However, the greatest damage to the remained tortoise populations has been done by uncontrolled collection for trade.  

This species has an important value for local economies. Since 1990s until present, it is a subject of zoological trade, covering the needs of pet market, mostly in Europe. The tortoises for trade have been caught mostly in natural environment, therefore planning and control of animals collected for zoo-market are extremely important.

Collection of Central Asian Tortoise for trade started in 1960-1980s in southern Kazakhstan by Central Asian zoo-enterprise, located in Tashkent. Since independence time in 1990, this zoo-enterprise started to collect tortoises for trade in Uzbekistan, supplying for the market 4,000 -19,000 individuals annually. At the same time, the illegal trade to Russia and Ukraine on assessment of experts reached 50,000 individuals annually (Bondarenko & Peregontsev, 2006).  Until 1999, the CITEC quote was issues to Russia. Since 1999, it is issued directly to Uzbekistan. At the same time, since 1999 to 2016 the annual export quotas for collection of tortoises in natural environment increased from 35,000 to 80,000 individuals (UNEP-WCMC, 2016). A trend of sharp increase in trade took place from 2009. More likely, it is related not only high demand of the foreign markets in inexpensive turtles, but also by the increased number of organizations received official permits for catching. In total, according to expert evaluation from 1997 to 2015 only in Uzbekistan there were collected for trade legally 592,100 individuals. Besides, at least 430,000 individuals were exported for the same period of time illegally mostly to Russia and Ukraine (Bondarenko & Peregontsev, 2017).

Surveys carried out in Uzbekistan on the areas of long-term collection of tortoises for trade showed that uncontrolled catch caused the sex and age composition of the populations. After collection of individuals, suitable for trade (specimens with carapace’s length less than 12 cm), the populations are mostly represented by females over 15 years old (Bondarenko et al., 2001), because males are smaller than females and their share in catch is greater. The further research indicated that after 10 years of tortoise collection within surveyed areas, their density of populations significantly decreased and did not recover to the level before catching in next 9 years. The population density within the most part of the tortoise range does not exceed 3.0 individuals per hectare.

All these facts indicate that sustainable catch of tortoises from natural environment should be only 10,000 – 12,000 individuals annually. But even in this case the international mechanisms do not solve the problem of tortoise conservation, because illegal collection and illegal export of tortoises through Kazakhstan to Russia and Ukraine. The conservation efforts should include strengthening of legislation and control, including other Central Asian countries, Russia and Ukraine. Monitoring of wild populations, public awareness and engagement in conservation of local communities in desert regions.         

References:

IUCN Red List of Threatened Species. 2020. https://www.iucnredlist.org/species/21651/9306759

Bondarenko D. A., Peregontsev E. A. 2006. Perspectives of Study and Protection of Steppe Tortoise in Uzbekistan // Chelonii. Vol. 4. P. 278 – 284.

Bondarenko D.A., Peregontsev E.A. 2017. Distribution of the Central Asian Tortoise (Agrionemys horsfieldii [Gray, 1844]) in Uzbekistan (Range, regional and landscape distribution, populations density). // Modern Herpetology, 2017, V. 17, issue 3/4. Pp. 124-146.

UNEP-WCMC. 2016 . Review of species selected on the basis of the Analysis of 2016 CITES export quotas. UNEP-WCMC. Cambridge. Available at:
http://ec.europa.eu/environment/cites/pdf/reports/