Thymallus tugarinae explained

Thymallus tugarinae, also known as the Lower Amur grayling, is a species of freshwater fish in the salmon family. It is found in the lower reaches of the Amur river on the border of the Russian far east and Heilongjiang Province of China. It was first described in 2007 and is sometimes mistaken for the Amur grayling.^[1]

Description

The Lower Amur grayling can reach a recorded length of 25.5 cm (10 inches) and 6 years old.^[2] There is a wide red to maroon edging with the width 5–6 mm seen along the upper margin of the dorsal fin. 4-5 rows of same-color spots are observed to be in parallel with the edging. There is also bright orange sinuous stripes between the scale rows going along the body. The upper jaw overlaps with the anterior margin of the eye.^[3]

Life cycle

The Lower Amur grayling spawns in rivers of the Amur Basin from the middle to the end of May.^[4] The autumn downstream migration in tributaries of the lower Amur river takes place from September to October. The fish mostly feed on mayfly and stonefly larvae, imago caddis and other bugs.^[5] It is also reported that in the Anyui River, they are feed on various zoobenthos organisms.^[6]

Notes and References

1. Mikheev . P. B. . Ostrovskii . V. I. . Semenchenko . N. N. . Novomodnyi . G. V. . Shmigirilov . A. P. . Antonov . A. L. . Barabanshchikov . E. I. . Biological specific features of the Lower Amur grayling Thymallus tugarinae (Salmoniformes: Thymallidae): 1. Age composition . Journal of Ichthyology . 1 September 2012 . 52 . 8 . 519–527 . 10.1134/S0032945212050037 . 30 November 2023 . en . 1555-6425.
2. Web site: MIKHEEV . Pavel B. . BAKLANOV . Mikhail A. . NIKIFOROV . Andrey I. . SEMENCHENKO . Alexander A. . COMPARATIVE STUDY OF THE SEISMOSENSORY SYSTEM OF TWO AMUR GRAYLING SPECIES IN THE ZONE OF THE SYMPATRY . Acta Ichthyologica et Piscatoria . 30 November 2023.
3. Knizhin . I. B. . Antonov . A. L. . Safronov . S. N. . Weiss . S. J. . New species of grayling Thymallus tugarinae sp. nova (Thymallidae) from the Amur River Basin . Journal of Ichthyology . 1 March 2007 . 47 . 2 . 123–139 . 10.1134/S0032945207020014 . 30 November 2023 . en . 1555-6425.
4. Weiss . Steven . Secci-Petretto . Giulia . Antonov . Alexander . Froufe . Elsa . Multiple species of grayling (Thymallus sp.) found in sympatry in a remote tributary of the Amur River . Zoologica Scripta . January 2020 . 49 . 1 . 117–128 . 10.1111/zsc.12393 . en . 0300-3256. free .
5. Ma . Bo . Lui . Tingting . Zhang . Ying . Chen . Jinping . Phylogeography and Population Genetic Structure of Amur Grayling Thymallus grubii in the Amur Basin . Asian-Australasian Journal of Animal Sciences . July 2012 . 25 . 7 . 935–944 . 10.5713/ajas.2011.11500 . 1011-2367. free . 25049647 . 4092984 .
6. Antonov . A. L. . Mikheev . I. E. . New data about distribution of lower Amur grayling Thymallus tugarinae and Baikal-Lena grayling Thymallus sp. (Thymallidae) in the basins of the upper Amur River and Zeya River . Journal of Ichthyology . 1 March 2016 . 56 . 2 . 208–216 . 10.1134/S0032945216020016 . 30 November 2023 . en . 1555-6425.