Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine)
A new distribution boundary of the dice snake, Natrix tessellate (Laurenti, 1768), in Ukraine has been established. The northern edge currently lies within the valley of the middle course of the Dnipro River: Trakhtemyriv Peninsula, Cherkasy Region on the right side (49°59' N, 31°25' Е); o...
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| Zitieren: | Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) / O.D. Nekrasova, G.G. Gavris, V.V. Kuybida // Вестник зоологии. — 2013. — Т. 47, № 5. — С. 475–479. — Бібліогр.: 21 назв. — англ. |
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irk-123456789-1098432016-12-18T03:02:45Z Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) Nekrasova, O.D. Gavris, G.G. Kuybida, V.V. Краткие сообщения A new distribution boundary of the dice snake, Natrix tessellate (Laurenti, 1768), in Ukraine has been established. The northern edge currently lies within the valley of the middle course of the Dnipro River: Trakhtemyriv Peninsula, Cherkasy Region on the right side (49°59' N, 31°25' Е); on the left side in Kyiv Region within Pereyaslav-Khmelnytsky District: at a fishermen’s station (50°02' N, 31°17' Е), yacht club (Kurinoye Estuary 50°02' N, 31°29' E); Lubny, Poltava Region (49°58' N, 33°01' Е). These points are located 70–80 km northwards from the previous boundary of the species home range. The level of Natrix tessellate population polymorphism in the North of Cherkasy Region is high; more than 40 % of specimens are dark-colored. Установлены новые пределы распространения водяного ужа, Natrix tessellate (Laurenti, 1768), в Украине, относящиеся к долине Среднего Днепра: правобережье — Трахтемировский п-ов Черкасской обл. (49°59' N, 31°25' Е), левобережье — Переяславо-Хмельницкий р-н Киевской области: рыбстан (50°02' N, 31°17' Е) и яхтклуб (Куриное гирло 50°02' N, 31°29' E), г. Лубны, Полтавской обл. (49°58' N, 33°01' Е). Данные пункты находятся на расстоянии около 70–80 км севернее от предыдущей границы ареала вида. Группировка ужей на севере Черкасской обл. отличается большим полиморфизмом и наличием более 40 % тёмных особей. 2013 Article Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) / O.D. Nekrasova, G.G. Gavris, V.V. Kuybida // Вестник зоологии. — 2013. — Т. 47, № 5. — С. 475–479. — Бібліогр.: 21 назв. — англ. 0084-5604 DOI 10.2478/vzoo-2013-0050 http://dspace.nbuv.gov.ua/handle/123456789/109843 598.115.31(477) en Вестник зоологии Інститут зоології ім. І.І. Шмальгаузена НАН України |
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Краткие сообщения Краткие сообщения Nekrasova, O.D. Gavris, G.G. Kuybida, V.V. Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) Вестник зоологии |
| description |
A new distribution boundary of the dice snake, Natrix tessellate (Laurenti, 1768), in Ukraine has been established. The northern edge currently lies within the valley of the middle course of the Dnipro River: Trakhtemyriv Peninsula, Cherkasy Region on the right side (49°59' N, 31°25' Е); on the left side in Kyiv Region within Pereyaslav-Khmelnytsky District: at a fishermen’s station (50°02' N, 31°17' Е), yacht club (Kurinoye Estuary 50°02' N, 31°29' E); Lubny, Poltava Region (49°58' N, 33°01' Е). These points are located 70–80 km northwards from the previous boundary of the species home range. The level of Natrix tessellate population polymorphism in the North of Cherkasy Region is high; more than 40 % of specimens are dark-colored. |
| format |
Article |
| author |
Nekrasova, O.D. Gavris, G.G. Kuybida, V.V. |
| author_facet |
Nekrasova, O.D. Gavris, G.G. Kuybida, V.V. |
| author_sort |
Nekrasova, O.D. |
| title |
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) |
| title_short |
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) |
| title_full |
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) |
| title_fullStr |
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) |
| title_full_unstemmed |
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) |
| title_sort |
changes in the nothern border of the home range of the dice snake, natrix tessellata (reptilia, colubridae), in the dnipro basin (ukraine) |
| publisher |
Інститут зоології ім. І.І. Шмальгаузена НАН України |
| publishDate |
2013 |
| topic_facet |
Краткие сообщения |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/109843 |
| citation_txt |
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colubridae), in the Dnipro Basin (Ukraine) / O.D. Nekrasova, G.G. Gavris, V.V. Kuybida // Вестник зоологии. — 2013. — Т. 47, № 5. — С. 475–479. — Бібліогр.: 21 назв. — англ. |
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Вестник зоологии |
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2025-07-07T23:43:50Z |
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2025-07-07T23:43:50Z |
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| fulltext |
UDC 598.115.31(477)
CHANGES IN THE NOTHERN BORDER OF THE HOME
RANGE OF THE DICE SNAKE, NATRIX TESSELLATA (REPTILIA,
COLUBRIDAE), IN THE DNIPRO BASIN (UKRAINE)
O. D. Nekrasova1, G. G. Gavris1, V. V. Kuybida2
1 Schmalhausen Institute of Zoology, NAS of Ukraine,
vul. B. Khmelnytskogo, 15, Kyiv, 01601 Ukraine
E-mail: oneks@mail.ru
2 Grigoriy Skovoroda National Pedagogical University of Perejaslov-Khmelnytsly,
Sukhomlinsky str., 30, Pereyaslov-Khmelnytsky, 08401 Ukraine
Changes in the Nothern Border of the Home Range of the Dice Snake, Natrix tessellata (Reptilia, Colu-
bridae), in the Dnipro Basin (Ukraine). Nekrasova O. D., Gavris G. G., Kuybida V. V. — A new distribu-
tion boundary of the dice snake, Natrix tessellate (Laurenti, 1768), in Ukraine has been established. The
northern edge currently lies within the valley of the middle course of the Dnipro River: Trakhtemyriv Pe-
ninsula, Cherkasy Region on the right side (49°59ђ N, 31°25ђ Å); on the left side in Kyiv Region within
Pereyaslav-Khmelnytsky District: at a fishermen’s station (50°02' N, 31°17' Å), yacht club (Kurinoye
Estuary 50°02ђ N, 31°29ђ E); Lubny, Poltava Region (49°58ђ N, 33°01ђ Å). These points are located
70–80 km northwards from the previous boundary of the species home range. The level of Natrix tessel-
lata population polymorphism in the North of Cherkasy Region is high; more than 40 % of specimens
are dark-colored.
Key wo rd s: reptiles, Natrix tessellata, dice snake, home range, Ukraine.
Ê èçìåíåíèþ ñåâåðíîé ãðàíèöû àðåàëà âîäÿíîãî óæà, Natrix tessellata (Reptilia, Colubridae), â áàñ-
ñåéíå Äíåïðà (Óêðàèíà). Íåêðàñîâà Î. Ä., Ãàâðèñü Ã. Ã., Êóéáèäà Â. Â. — Óñòàíîâëåíû íîâûå
ïðåäåëû ðàñïðîñòðàíåíèÿ âîäÿíîãî óæà, Natrix tessellate (Laurenti, 1768), â Óêðàèíå, îòíîñÿùèåñÿ
ê äîëèíå Ñðåäíåãî Äíåïðà: ïðàâîáåðåæüå — Òðàõòåìèðîâñêèé ï-îâ ×åðêàññêîé îáë. (49°59ђ N,
31°25ђ Å), ëåâîáåðåæüå — Ïåðåÿñëàâî-Õìåëüíèöêèé ð-í Êèåâñêîé îáëàñòè: ðûáñòàí (50°02ђ N,
31°17ђ Å) è ÿõòêëóá (Êóðèíîå ãèðëî 50°02' N, 31°29ђ E), ã. Ëóáíû, Ïîëòàâñêîé îáë. (49°58' N,
33°01ђ Å). Äàííûå ïóíêòû íàõîäÿòñÿ íà ðàññòîÿíèè îêîëî 70–80 êì ñåâåðíåå îò ïðåäûäóùåé
ãðàíèöû àðåàëà âèäà. Ãðóïïèðîâêà óæåé íà ñåâåðå ×åðêàññêîé îáë. îòëè÷àåòñÿ áîëüøèì ïîëè-
ìîðôèçìîì è íàëè÷èåì áîëåå 40 % ò¸ìíûõ îñîáåé.
Êëþ÷åâûå ñëîâà: ïðåñìûêàþùèåñÿ, Natrix tessellata, âîäÿíîé óæ, àðåàë, Óêðàèíà.
Introduction
The dice snake Natrix tessellata (Laurenti, 1768) is one of the two Natrix species in Ukraine. This spe-
cies is on the list of the specially protected animals (Appendix II) of the Bern Convention (1998). N. tes-
sellata belongs to the southern steppe hydrophilic and thermophilic species of Mediterranean origin by its
biotopic and climatic preferences. The northern boundary of N. tessellata distribution is not studied enough for
Ukraine. Thus, in 1950–1980 it was information that this species spread only on south and west of Ukraine,
in Transñarpathian, Dnipropetrovsk, Luhansk, Odessa, Zaporizhzhya, Mykolaiv, Kherson Regions and al-
most everywhere on the coasts of the Black Sea and Sea of Azov and Crimean Peninsula (Tarashchuk, 1959;
Shcherbak, 1966; Shcherbak, Shcherban, 1980). In 1960s Ukrainian areal of this species reached Pelaheivka
vil. (Mykolaiv Region, 47°44ђ N) and Lubimovka (Dnipropetrovsk Region, 48°22ђ N); Russian areal reached
53–54° N: Uljanovsk Region (Tarashchuk, 1959; Bakiev et al., 2009). “Indentification manual…” (Êurilenko,
Verves, 1999) presents information that this species occurs in Cherkasy, Mykolaiv, Kyrovohrad (Sumy and
Zhytomyr Regions misgiven), south of Kharkiv, Zaporizhzhya, arpathian Regions, in and Crimea. Accord-
ing to modern data, the northern boundary of N. tessellata distribution on the Left Bank Ukraine reaches the
southern parts of Poltava, Kharkiv and Luhansk Regions, parallel or corresponding to July isotherm (21 °Ñ)
and north of — 49°41ђ N (Zinenko, 2008; Kotenko et al., 2011; Marosi et al., 2012). In the Right bank
of Ukraine distribution of N. tessellata reaches southern part of Cherkasy, Zhytomyr (data needing verifi-
cation), and Dnipropetrovsk, Poltava, Kirovohrad, Vinnytsa, Khmelnitsky, Ternopil, Ivano-Frankivsk and
Zakarpattya Regions (Tarashchuk, 1999; Bulakhov, 2007; Nekrasova, 2010; Sobolenko, Tarashchuk, 2008).
Vestnik zoologii, 47(5): e-67–e-71, 2013
DOI 10.2478/vzoo-2013-0050
Unauthenticated
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68 O. D. Nekrasova, G. G. Gavris, V. V. Kuybida
Material and methods
During 2003–2013 groupings of Natrix tessellata were found in Poltava Region near Kobeliaky (Kobeliakskiy
District, Vorskla River, 49°09ђ N, 34°14ђ Å), nearby Lubny (Lubny District, Sula River, 49°58ђ N, 33°01ђ Å, fig. 1:
1, 2) and Cherkasy Region; Kyiv Region, Pereyaslav-Khmelnytsky District (yacht club — 50°02ђ N, 31°29ђ E
spring 2012, 2013; fishermen’s station — 50°02ђ N, 31°17ђ Å, coll. Saulko R. 01/05/2013). Standard morpho-
logical parameters were analyzed (2 morphometric and 10 features of pholidosis) for 11 dice snakes (5 females,
4 males, 2 juvenile) from Trakhtemyriv Peninsula (Cherkasy Region, Kaniv District): Buchak village (lake,
49°52ђ N, 31°25ђ Å, fig. 1: 3; 2004–2005, 2007–2010, 2012), Hryhorivka village (Dnipro, 49°57ђ N, 31°25ђ Å,
fig. 1: 4; summer 2012–2013), Batura and Zarubency natural boundery (Dnipro, 49°59ђ N, 31°25ђ Å, fig. 1:
5; summer 2012–2013), Monastirok natural boundery (Dnipro, 49°59ђ N, 31°23ђ Å, fig. 1: 6; summer 2013);
Trakhtemyriv Village (Dnipro, 49°59ђ N, 31°20ђ Å, fig. 1: 7; 05/05/2013). Coloration and pattern was studied in
vivo. Digital collection of photo was taken with Olympus SP570UZ camera; some specimens stored in collection
of Schmalhausen Institute of Zoology NAS of Ukraine and Grigoriy Skovoroda National Pedagogical University
of Pereyaslav-Khmelnytsky. Statistical treatment was made with Statistica for Windows v. 8.0. Cartoghraphic sup-
port was made with OziExplorer v. 3.95.4m and DIVA GIS (http: // www.diva-gis.org) (cartographic modeling).
Results and discussion
In 2003 a small aggregation of N. tessellata was found in the Leftbank Ukraine in the
Vorskla River near village Kobeliaky. Same year a large aggregation of adults and juve-
nile specimens was observed south of Lubny along the right bank of Sula River (Poltava
Region, July 2003). The specimens were of different age and coloration. Aggregations of
Fig. 1. Map of Ukraine with Natrix tessellata areal changes for the last 50 years.
Distributional ranges of N. tessellata: I — literature data for 1950–1970 (Sherbak, 1966; Tarashchuk, 1959); II — lit-
erature data (Bannikov et al., 1977; Ananjeva et al., 2004) and III — modern literature data (Kotenko et al., 2011);
IV — latitude (50° N); new records in Poltava Region: 1 — Kobeliaky Village (Vorskla River), 2 — near Lubny
(Sula River); Cherkasy Region: 3 — Buchak Lake (Dnipro, Kaniv Reservoir); 4 — Hryhorivka Village; 5 — Batura
and Zarubency natural boundaries; 6 — Monastirok natural boundary; 7 — Trakhtemyriv Village; Kyiv Region,
Pereyaslav-Khmelnytsky District: 8 — yacht club; 9 — fishermen’s station; Zhytomyr Region: «?» — Ruzhyn (lit.
dat., Shcherbak, 1967).
Ðèñ. 1. Êàðòà Óêðàèíû ñ óêàçàíèåì èçìåíåíèÿ àðåàëà Natrix tessellata çà ïîñëåäíèå 50 ëåò.
Ãðàíèöû ðàñïðîñòðàíåíèÿ N. tessellata ïî ëèòåðàòóðíûì äàííûì: I — ëèòåðàòóðíûå äàííûå 1960–
1970-å ãã. (Ùåðáàê, 1966; Òàðàùóê, 1959); II — ëèòåðàòóðíûå äàííûå (Áàííèêîâ è äð., 1977; Àíàíüåâà
è äð., 2004); III — ëèòåðàòóðíûå äàííûå (Kotenko et al., 2011); IV — øèðîòà (50° ñ. ø.); òî÷êè íîâûõ
íàõîäîê â Ïîëòàâñêîé îáë.: 1 — îêð. ïãò Êîáåëÿêè (ð. Âîðñêëà), 2 — îêð. ã. Ëóáíû (ð. Ñóëà); â ×åð-
êàññêîé îáë.: 3 — îç. Áó÷àê (îêð. ñ. Áó÷àê, ð. Äíåïð, Êàíåâñêîå âîäîõðàíèëèùå); 4 — ïîñ. Ãðèãîðîâ-
êà; 5 — óð. Ìîíàñòûðåê è óð. Áàòóðà (íàïðîòèâ ïîñ. Ëóêîâèöû); 6 — óð. Ìîíàñòûðåê; 7 — ïîñ. Òðàõ-
òåìèðîâ è Êèåâñêàÿ îáë. Ïåðåÿñëàâî-Õìåëüíèöêèé ð-í: 8 — ÿõòêëóá; 9 — ðûáñòàí â Æèòîìèðñêîé
îáë.: «?» — ã. Ðóæèí (ëèò. äàí. Ùåðáàê, 1967).
Unauthenticated
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69Changes of the Dice Snake, Natrix tessellata (Reptilia, Colubridae)…
dice snakes reached up to ten specimens per 1 km near steep slopes on the right bank of
the Sula. On the 4th of July 1978 one dead snake was found by T. I. Kotenko (Kotenko
et al., 2011). Later, this find was not confirmed by these authors.
In the summers of 2004, 2005 and 2007–2010 isolated specimens of N. tessellata
were observed on the right bank of Dnipro, near Buchak Village. Dice snakes stayed in
the deep artificial lake with running water. The lake of 7 ha was formed in 1980s in the
excavation site of a hydro power pumping station. The lake is filled with spring water and
connected with the Kaniv Reservoir. In 2012 a large group of dice snakes was found in
the creeks of Dnipro from Hryhorivka to Lukovitsya villages, 4–12 km north of the lake.
In 2013 snakes were observed north of — Cherkasy Region, Kaniv District: Monastirok
natural boundary; Trakhtemyriv Village; Kyiv Region, Pereyaslav-Khmelnytsky District:
yacht club and fishermen’s station (see materials and methods).
Young specimens of Trakhtemyriv Peninsula hatched in the beginning of the sum-
mer 2012, were 200–215 mm of body length (L.), and 35–40 mm of caudal length
(L. cd.) in July; one female laid eggs in the beginning of July.
Body length of adults (L.) — 648 ± 36 mm, tail (L. cd.) — 147 ± 36 mm (total
length: males (m) — 585–905 mm; females (f) — 700–950 mm); L./L. cd. = 4.4 ±
0.2 (m — 4.3 ± 0.3; f — 4.5 ± 0.2). Head scales: upper labral (Lab.) — 7–9, lower
labial (Sub. lab.) — 8–10, preorbital (Pr.) — 2–3, postorbital (Post.) — 3–4, temporal
(Temp.) — 1(3). Neb sharpened, suture between rostral and first upper labral more than
two times larger than rostral and internasal suture, posterior chin shields scute longer
than anterior and separated by scales. Squamae around middle of body (Sq.) — 19–21
(m — 19.3 ± 0.3; f — 19.8 ± 0,4). Scutes on ventral part of body (Ventr.) — 161–190
(m — 183.3 ± 3; f — 179.6 ± 5), under tail (S. cd.) — 56–70 (m — 58.8 ± 3; f — 61.0
± 5), anal scute (A.) separate. Squamae on back and dorsal part of tail is with well-de-
veloped edges. Juvenile snakes (n = 2 specimens) had light grey-brown coloration with
4 rows of black spots on dorsal (Werner, Shapira, 2011), and yellow-orange ventral part
with black spots. All black spots were in staggered order. 60 % of adult specimens were
grey or brown, dorsal side with 4–6 rows of black spots, which are merging sometimes
and form dotted stripes (squamae edges could be yellow-orange), ventral part of body
yellow (34 %) or orange (66 % of the light forms) with black spots in staggered order.
Black spots are usually merged near anal scute. 40 % of adult specimens with dark or
black dorsal part of body (“partial melanist” — sometimes with light motleys), the labral
and labial scutes are partially white, ventral part is black and white, caudal scales are
black, the iris black.
Most of the melanistic forms (more than 5 %) occured in the South of Ukraine
on Kerch Peninsula. Apart from the dark color of dorsal and ventral part of the body,
specimens had difference in pholidosis features (Karmishev, 2002; Pisanets et al., 2005).
At the northern boundary of distribution of N. tessellata in Russia (north-western part of
Samara Region, 53°30ђ N), most of snake specimens had dark color dorsal surface and
black or yellow-red ventral body part with dark spots (Bakiev et al., 2009).
N. tessellata is the thermophilic species and on the northern boundary of areal it
needs special landscape and microclimatic conditions to survive, for example stony
denudations. In Russia, at the northern boundary of N. tessellata areal (Samara Region)
this species occurs near rocky cliffs of rivers (Volga, Usa). Mass hibernation of N. tes-
sellata was confined exactly to the stony denudations (Bakiev et al., 2009). Maximum
amount of dice snakes in Ukraine was observed near granite denudations and steeps (or
near) in the Mykolaiv and Zaporizhzhya Regions. The association found in Cherkasy
Region kept near southern and south-eastern side of Dnipro right bank steeps. The high-
est bank altitudes are located in this part of Trakhtemyriv Peninsula (Hryhorivka village,
242 m a. s. l.). This species has not been found near slope banks and on the northern and
north-west steeps near Khodoriv Vil. (Kyiv Region). N. tessellata has been observed in
Unauthenticated
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70 O. D. Nekrasova, G. G. Gavris, V. V. Kuybida
the Poltava Region (south of Lubny) near steeps and hills of one of the highest parts of
Sula river (c. 140–143 m a. s. l.). This species has not been found nearby on slope zones.
Near Hryhorivka Village (Cherkasy Region), the dice snakes were represented by
different age groups. In total, 20 specimens of this species were observed. Their popula-
tion was about 9 specimens per 1 km. Length of adult females was up to 950 mm (data
above). 3 subad. and 2 juv. specimens of N. tessellata were recorded. Recorded rates
show that the age of this association is not more than 6–10 years. This information was
confirmed by local fishers. In the beginning of July 2012 the highest activity of N. tes-
sellata was recorded not only in the morning but also in the evening hours. As the heat
declines (after 17 : 00 PM) mass hunt of dice snakes for bullhead fish was observed; they
hunted on neaps 100–200 m from the shore.
The artificial lake near Buchak village also has steep banks, but only separate speci-
mens of N. tessellata were observed there. We have captured one female 730 mm long
in 2004. We suggest that specimens get into the Buchak’s lake from Hryhorivka Village
randomly. The specimens of snake possibly appeared in the begging of 2000s as the result
of expansion upstream the Dnipro cascade or as the result of fish seeding.
Shcherbak (1967) noted that V. I. Brukhovsky collected N. tessellata in the south of
Zhytomyr Region, near Ruzhyn (49°42ђ N, fig. 1: «?») in 1958. Nowadays this speci-
men is stored in the collection of Zhitomyr Museum of Local History. There were no
records of this species from Zhytomyr Region later.
Thus, the northern boundary of N. tessellata distribution reaches: south of Lubny
(Poltava Region, Sula River, 49°58ђ N, fig. 1: 2); Kyiv Region, Pereyaslav-Khmelnytsky
District (50°02' N, fig. 1: 8, 9) for the left bank; Trakhtemyriv Village and Monasti-
roknatural boundary (Trakhtemyriv Peninsula, Cherkasy Region, Kaniv District, Dni-
pro, 49°59ђ N, fig. 1: 6, 7) for the right bank. Dice snakes of Trakhtemyriv water area
have about 40 % of snakes of the dark form, which represented by melanists and “in-
complete melanists” with black and white ventral part of body (n = 11 specimens). This
is the quite a large association represented by different age groups. The dice snakes were
observed on the peninsula since 2004, but in the last two years the growth of population
was recorded. This localities are 80 km to the north of the previous areal boundary, and
more than 200 km northwards of the areal boundary 50 years ago (Shcherbak, 1967).
The climatic changes are one of the reasons of dice snake areal changing. These changes
are confirmed by several facts. In 1981–2004 temperature of air surface layer in the Dni-
pro basin has grown for 0.5 °Ñ (Strutinska, 2007). Along with temperature growth of the
air, late freezing time for the Dnipro can be explained by insertion of chilling processes
for such great volume of water in reservoirs. Also, the temperature of water, in Kyiv for
April and May become higher than even in Kherson, after the Dnipro cascade was cre-
ated (Vyshnevsky, 2011). It allowed penetration of previously unknown animal species
to Kyiv (Nekrasova, Tytar, 2009). It is also worth note the appearance and increase in
the diversity of the prey-gobies and some other fish species. Thus, the recording of the
N. tessellata associations at 50° N show that this thermophilic species moves northwards,
and such monitoring studies should be continued.
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Received 15 January 2013
Accepted 1 October 2013
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