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FAR EASTERN QUAKSHA HYLA JAPONICA (GüNTHER, 1858) IN IRKUTSK REGION Text of a scientific article in the specialty - Biological Sciences


Squad:Anura Rafinesque, 1815 = Tailless Amphibians (Amphibians)

Family: Hyl>

Species: Hyla japonica Gunther = Far Eastern East Siberian tree frog

Hyla japonica Gunther, 1859 - Far Eastern tree frog

Description and taxonomy. Body length 30-52 mm. It is very similar to Hyla arborea, but it differs in that there is usually a dark spot on the upper lip under the eye, no inguinal loop, no hind legs slightly shorter (if you extend the hind leg along the body, the ankle joint usually reaches the posterior edge of the eye). The eardrum is smaller than the eye. The skin of the back is smooth, the skin of the belly is grainy. Coloring and sexual dimorphism are similar to those of Hyla arborea (the main difference is the absence of an inguinal loop). The dark strip on the sides of the body often breaks into dots and partially reduces.

Hyla japonica belongs to the Hyla arborea complex. Many foreign authors consider it a subspecies of H. arborea. However, biochemical and morphological differences between these forms reach a species rank; therefore, Far Eastern tree frog is a good species. In total, 2 or more subspecies are recognized; subspecies taxonomy is poorly studied. In the past, tree frogs from Transbaikalia and the Russian Far East were considered as separate species or subspecies. The name japonica was sometimes used only for Japanese and Korean populations. Several other forms have been described from various regions of the Far East. The lack of a taxonomic revision of tree frogs of the Far East does not currently make it possible to clearly divide them into subspecies. Therefore, only in accordance with the tradition established in Soviet literature on amphibians, tree frogs from Russia can be considered as a subspecies of Hyla japonica stepheni (Boulenger, 1887): 579 (typical territory: Port Hamilton, Korea). This subspecies is distinguished by relatively short legs.

Spread. Distributed in Japan, Korea, northeast and central China, northern Mongolia, the Russian Far East and Transbaikalia. In Transbaikalia at the northernmost point - the warm basin of the river. Barguzin (c. 54o30 'N, 110o E) - an isolated population inhabits. Northwest distribution limit - hr. Small Hamar-Daban in Buryatia (50-53 ° N, 103-108 ° E). Further, the border runs northeast to the delta of the river. Selenga (approx. 52o N, 107o E), further south through central Buryatia to the Chita region. In the latter, the northern boundary of the range passes approximately along the line: Chita (52o02 'N, 113o29' E) - p. Ingoda, further south-east along the valley of the river. Shilka (c. 52-53o N), probably before its confluence with the river. Cupid at the Chinese border. The second part of the range of H. japonica in Russia is the Far East. Here tree frog is distributed along the valleys of the Amur and Ussuri rivers and their tributaries. It is not yet clear whether there is a connection between the western tree frog populations in the Amur Valley and the populations on Shilka. In the Far East, the most western finds were made in the Amur Region. in the river basin Zeya, where tree frog is distributed north to its tributaries Gilyuy, Urkan, Dep, Gulik and Algaya (c. 55 ° N), as well as to its tributary p. Selemdzha (approx. 53 ° N, 131 ° E). From the river Zeya, the border of the range passes to the north-east along the Amur valley and to the north along the other left tributary of the Amur - r. Bureya to the settlement of Ust-Urgal, Verkhnebureinsky district, Khabarovsk Territory (approx. 51o N, 132o30 'E). From the river The Bureya border extends east and northeast to s. Sofiysk, Ulchi district, Khabarovsk Territory (51o32 'N, 139o50' E). In the Primorsky Territory tree frog is distributed in the valleys of the river. Ussuri and its tributaries, i.e. west of the Sikhote-Alin mountains. On the eastern slope of the Sikhote-Alin, it is known north to the Sikhote-Alin nature reserve (45o02 'N, 136o15' E). It also lives on Sakhalin, the islands of Kunashir and Shikotan (South Kuril Islands) and some islands of Peter the Great Bay in the Pacific Ocean.

Lifestyle. It inhabits mixed and deciduous forests, forest-steppe, bushes, meadows and swamps. In treeless areas tree frog inhabits mainly river valleys overgrown with shrubs. It is also found in villages and even some large cities. Propagated in standing puddles, ponds, elders, flooded quarries and lakes with dense grassy vegetation. Sometimes caviar is deposited in the backwaters of streams and rivers. Far Eastern tree frog is a common, sometimes numerous species, except for the northern parts of the range. The average population density decreases from 130 to 71 ind./km2 from the southern to the northern Amur region (Tagirova, 1984).

Wintering probably takes place from September - October to April - May (sometimes until June), in leaf litter, burrowing rodents, tree hollows, under stones, etc. Reproduction occurs later than in many other syntopic amphibians: in May - August. Metamorphosis in July - September. Many tadpoles, as well as masonry deposited in shallow ponds, die from drying out. The survival of embryos and larvae in one not drying up mountain lake of Primorye was estimated at 1.28-3.99% (Lyapkov, Severtsov, 1981).

The food composition of Far Eastern tree frog tadpoles and the corresponding age-related changes in Primorye are similar to those of the sympatric Far Eastern toad (Bombina orientalis) (Filipchuk, 1992, 1993).

The text of the scientific work on the theme "FAR EASTERN QUAKHA HYLA JAPONICA (GüNTHER, 1858) IN THE IRKUTSK REGION"

Series “Biology. Ecology"

Online access to the magazine: http://isu.ru/izvestia

2014.V. 8.P. 96-98

Irkutsk State University


Far Eastern tree frog Hyla japónica (Günther, 1858) in the Irkutsk region

State Natural Reserve Vitimsky, Bodaibo E-mail: [email protected]

Annotation. The first finds of the Far Eastern tree frog Hyla japonica (Günther, 1858) in the Irkutsk region are described.

Key words: Far Eastern tree frog, Irkutsk region.

When conducting field research on the afternoon of June 1, 2012, the author discovered Far Eastern tree frog Hyla japonica (Fig.) On the Uryakh cordon of the Vitim State Nature Reserve (Irkutsk Region, the right bank of the Vitim River near the border with the Republic of Buryatia). Amphibian moved slowly, basking in the sun, apparently, she recently left the winter shelter. The body length of the animal was 39 mm.

Outwardly, tree frog looked healthy, not noticeably thin during the winter. After measuring and photographing, she was seated on the trunk of a spruce tree near the ground, along which she moved a few centimeters up and continued to bask in the sun for several more minutes.

The biotope in which the find was made is an open area (cordon territory) - the edge of the forest on the bank of the river. Vitim. The tree layer at the find is formed by Gmelin larch and flat-leaved birch with little participation of Siberian spruce and Siberian pine. The shrub layer is sparse, represented by bush douche, Daurian rhododendron, and individual specimens of cedar dwarf. The grass-shrub layer is formed by continuous thickets of marsh rosemary and lingonberry. Forest litter consists of last year's birch leaves and soul-cue. In the forest there are puddles of melt water remaining after the snow has melted.

Voice signals of the Far Eastern tree frog are also recorded about 40 km downstream of the river. Vitim from the place of the first find near the cordon "Oron" of the Vitim Reserve, on the left bank of the channel connecting Lake. Oron and r. Vitim, in the afternoon of June 16, 2012, Amphibian vocalized in a flooded coastal sparse forest area. The forest stand here is formed by the larch Gmelin and the flat birch with an admixture of alder. Shrub layer is sparse, formed by spirea loosestrife and blueberries. The grass layer is represented by sedge thickets, completely hidden during this period under water. The depth at the site of flooding reached several tens of centimeters.

Fig. Far Eastern tree frog Nu1aarvtsa, discovered on 06/01/2012 on the Uryakh cordon of the Vitim State Nature Reserve

The tree frog continued to publish marital cries in the afternoon of June 17th. When trying to get closer, she fell silent every time, not allowing herself to be discovered. Cries were published in several (up to 15) episodes in a row, the intervals between episodes were several seconds, between groups of episodes - a few minutes. A series of screams consisted of 10-15 short signals produced at a frequency of about 3 signals per second. In the open space, the ducts were clearly audible at a distance of at least 500 m.

Biotopes in which the presence of Far Eastern tree frog was observed are generally characteristic of the species.

The nearest known northern habitat for Far Eastern tree frogs is located in the valley of the Vitim tributary - r. Muya (Severomuisk district of the Republic of Buryatia) 1-3, about 110 km upstream of the river. Vitim from the place of the described find. Obviously, the range of the species is expanding to the north along the river valley.

The author is grateful to I.V. Fefelov for the kindly provided sound recording of the voice of the Far Eastern tree frog from the library of animal voices named after B.N. Veprintseva.

1. Amphibians and reptiles. Encyclopedia of the Nature of Russia / N. B. Ananyeva et al. - M.: ABF, 1998. - 576 p.

2. Kurtova O. G. Far Eastern tree frog / O. G. Kurtova, V. F. Lyamkin // Red Book of the Chita Region and the Aginsky Buryat Autonomous Okrug (animals). - Chita: Search, 2000. - S. 119.

3. Popov V.V. Protection of vertebrates in the Baikal region / V.V. Popov, A.N. Matveev. - Irkutsk: Publishing House NTs RVH VSNTS SB RAMS, 2006. -110 p.

Japanese tree frog Hyla japonica (Günther, 1858) in Irkutsk region

Vitimsky Nature Reserve, Bodaibo

Abstract The description of first findings of Japanese tree frog Hyla japonica (Günther, 1858) in Irkutsk region is given.

Key words: Japanese tree frog, Irkutsk region

Volkov Sergey Leonidovich Volkov Sergey Leonidovich

Research Scientist

State Natural Vitimsky Nature Reserve

Vitimsky Nature Reserve 4a, Irkutskaya st., Bodaibo, Irkutsk region,

666902, Irkutsk Region, Bodaibo, 666902

st. Irkutsk, 4a tel.: (39561) 7-69-95

tel .: (39561) 7-69-95 e-mail: [email protected]

Bulletin of Irkutsk State University 2014. V. 8. Series “Biology. Ecology". S. 96-98