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Life-cycle and karyology of Branchiura sowerbyi Beddard (Oligochaeta, Tubificidae)
Casellato, S. (1984). Life-cycle and karyology of Branchiura sowerbyi Beddard (Oligochaeta, Tubificidae), in: Bonomi, G. et al. (Ed.) Aquatic Oligochaeta: Proceedings of the 2nd International Symposium on Aquatic Oligochaete Biology, held in Pallanza, Italy, September 21-24, 1982. Developments in Hydrobiology, 24: pp. 65-69
In: Bonomi, G.; Erséus, C. (Ed.) (1984). Aquatic Oligochaeta: Proceedings of the 2nd International Symposium on Aquatic Oligochaete Biology, held in Pallanza, Italy, September 21-24, 1982. Reprinted from Hydrobiologia, vol. 115. Developments in Hydrobiology, 24. W. Junk Publishers: Dordrecht. ISBN 90-6193-775-2. 240 pp., more
In: Dumont, H.J. (Ed.) Developments in Hydrobiology. Kluwer Academic/Springer: The Hague; London; Boston; Dordrecht. ISSN 0167-8418, more

Also published as
  • Casellato, S. (1984). Life-cycle and karyology of Branchiura sowerbyi Beddard (Oligochaeta, Tubificidae). Hydrobiologia 115: 65-69, more

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  • Casellato, S.

Abstract
    Data on the life-cycle of a population of Branchiura sowerbyi Beddard in a water-lily tank at the Botanical Garden in Padua are reported. The breeding period is from April to July, after which the reproductive system is partially resorbed (August-September) and reformed later in the autumn. The karyology of the species was also studied, and revealed 38 mitotic chromosomes in the gonia, and 19 bivalents in the primary spermatocytes and in the primary oocytes.

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