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Phase Variation in non-swarming Grasshoppers

Published online by Cambridge University Press:  10 July 2009

I. A. Rubtzov
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Extract

1. All the species of Siberian grasshoppers that have been studied in sufficient detail consist of a series of races exhibiting parallel coloration, structure and behaviour characters.

2. Every race of Chorthippus albomarginatus, Zett., Aeropus sibiricus, L., and of other species, has in its hopper and adult stage a series of colour forms analogous in their characters to the phases solitaria, transiens and gregaria of swarming locusts.

3. These colour forms are very unstable and undergo changes during the individual life due to the conditions of breeding.

4. Breeding in crowded conditions results in the predominance of dark-coloured forms, with black and sometimes with orange spots. Breeding in isolation, on the contrary, results in light forms of various colours.

5. No complete transformation of all the individuals in a population is observed in Siberian grasshoppers, and the intermediate forms represent a considerable portion of every population.

6. These colour forms, which can be considered as phases, differ also in their structural characters. Phase gregaria is larger and more long-winged than phase solitaria.

7. The phases differ further in their behaviour, ph. gregaria being more mobile and inclined to migrations, than ph. solitaria.

8. Every species and every race which have been studied exhibit a potential ability to produce phases, but this ability is not equal in all species and races. Those species and races which, owing to their habits and to the conditions of their habitats, can multiply in masses in restricted areas are more inclined to phase variability.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 26 , Issue 4 , December 1935 , pp. 499 - 520
Copyright
Copyright © Cambridge University Press 1935

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References

Faure, J. C. (1923.) The life history of the Brown Locust.—Bull. Transvaal Univ. Coll., Pretoria, no. 4, 30 pp., 2 pls.Google Scholar
Faure, J. C. (1932.) The phases of locusts in South Africa.—Bull. Ent. Res. 23, pp. 293–424, 25 pls., 1 map.CrossRefGoogle Scholar
Faure, J. C. (1933.) The phases of the Rocky Mountain locust Melanoplus mexicanus (Saussure).—J. Econ. Ent., 26, pp. 706–718, 1 pl.Google Scholar
Gause, G. F. (1928.) Zur Kenntnis der Variabilität der Wanderheuschrecke (Locusta migratoria, L.).—Z. angew. Ent. 13, pp. 248–266.Google Scholar
Johnston, H. B. (1926.) A further contribution to our knowledge of the bionomics and control of the Migratory Locust, Schistocerca gregaria, Forsk. (peregrina, Oliv.), in the Sudan.—Wellcome Trop. Res. Lab., Khartoum, Ent. Sect., Bull, 22, 14 pp., 1 map.Google Scholar
Makalovskaya, V. N. (1930.) On the biometrical characteristic of the races of the Asiatic Locust. [In Russian.]—Bull. Plant Prot., Leningrad, 1, pp. 263–274.Google Scholar
Nikolskiǐ, V. V. (1925.) The Asiatic Locust. [In Russian].—Leningrad, 330 pp., figs.Google Scholar
Olsuf'ev, N. G. (1930.) Zur Frage über die Periodizität der asiatischen Heuschrecke. [In Russian.]—Bull. Plant Prot., Leningrad 1, pp. 91–147, 6 graphs.Google Scholar
Plotnikov, V. I. (1915.) Reports on the work of the Turkestan Entomological Station for 1912, 1913, 1914 and part of 1915. [In Russian.]—Tashkent, 60 pp.Google Scholar
Plotnikov, V. I. (1924.) Some observations on the variability of Locusta migratoria, L., in breeding experiments.—Bull. Ent. Res. 14, pp. 241–243.CrossRefGoogle Scholar
Plotnikov, V. I. (1927.) Locusta (Pachytylus) migratoria, L. and danica, L., as independent forms and their derivatives. [In Russian.]—Uzbekistan PI. Prot. Sta., Tashkent, 33 pp., 12 figs.Google Scholar
Potgieter, J. T. (1929.) A contribution to the biology of the Brown Swarm Locust Locustana pardalina (Wlk.) and its natural enemies.—Pan Afr. Agric. Vet. Conf., Pretoria, (1929.) Papers Agric. Sect. pp. 265–308, 1 map, 7 pls.; Rep. Proc. pp. 113–127.Google Scholar
Predtechenskǐ, S. A. (1928.) Locusta migratoria, L., in Central Russia. [In Russian.]—Izv. Otd. prikl. Ent., Leningrad 3. pp. 113–199, 4 figs.Google Scholar
Rubtzov, I. A. (1932.) The habitats and conditions of grasshoppers' outbreaks in East Siberia. [In Russian.]—Bull. Plant Prot., Leningrad, (I Ent.) no. 3, pp. 33–130, 6 diag., 1 map.Google Scholar
Tarbinskiǐ, S. P. (1932.) On the question of the phase variability of locusts. [In Russian.]—Bull. Leningrad Inst. Controll. Frm. For. Pests, Leningrad 3, pp. 303–320, 3 figs. 1 graph.Google Scholar
Uvarov, B. P. (1911.) Migratory locust in the Stavropol province in 1911. [In Russian.]—Zasch. Rast. ot Vred. (Suppmt. Lyubit Prirodui), no. 3, pp. 13–22.Google Scholar
Uvarov, B. P. (1921.) A revision of the genus Locusta, L. (Pachytylus, Fieb.), with a new theory as to the periodicity and migration of locusts.—Bull. Ent. Res. 12, pp. 135–163, 8 figs.Google Scholar
Uvarov, B. P. (1922.) On the study of Russian Acrididae. [In Russian.]—Izv. Otd. prikl. Ent., Leningrad 2, pp. 49–86.Google Scholar
Uvarov, B. P. (1926.) New data on the locust problem. [In Russian.]—Khlopkovoe Delo, Moscow 5, pp. 837–845.Google Scholar
Uvarov, B. P. (1928.) Locusts and Grasshoppers. A handbook for their study and control.—Imp. Bur. Ent., London, xiii+352 pp., 9 pls., 1 map, 118 figs.Google Scholar
Uvarov, B. P. (1929.) The Desert Locust (Schistocerca gregaria, Forsk.). [In Russian.]—Chief Cotton Committee, Moscow, 48 pp., 6 figs.Google Scholar
Uvarov, B. P. & Zolotarevsky, B. N. (1929.) Phases of locusts and their interrelations.—Bull. Ent. Res. 20, pp. 261–265.CrossRefGoogle Scholar
Vavilov, N. I. (1922.) The law of homologous series in variation.—J. Genet., Cambridge 12, pp. 47–89.Google Scholar
Vorontzovskiǐ, P. A. (1928.) On the question of homologous ranges of colour variation in Acrididae. [In Russian.]—Bull. Orenburg Plant Prot. Sta. 1, pp. 27–39.Google Scholar