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Title: Fish leech life cycle
Description: This image shows the life cycle of the fish leech Piscicola geomtera and is adapted from Malecha, J. 1984. Cycle biologique de l'hirudin?e rhynchobdelle Piscicola geometra L. Hydrobiologia 118 pp. 237-243. In spring the larger overwintering leeches ('A') secrete cocoons which hatch in late April/early May giving birth to the 'B' generation. The 'B' leeches breed throughout summer and lay the first eggs in mid-June ('C1') and the last ones in late August/early September ('C2') (although the 'C2' generation may not be very numerous). The cocoons secreted by 'C1'give birth to 'D1' from early August and then to 'D2' in September. The 'D1' leeches may be the original of the 'E' generation at the end of September. The last leeches issued from the summer generations ('B', 'C1', 'D1') die off in early October whilst the store of overwintering leeches ('A') is made up of the 'C2', 'D2' and 'E' generatons.
Photographer: Roger Sweeting
Curator: Freshwater Biological Association
Copyright Holder: Freshwater Biological Association
Note: Date taken/drawn:1970-01-01
Publisher: Freshwater Biological Association
Note (original item): Record creation date:2008-08-19 14:18:04
Subject Keywords: Fish leech; Life cycle
Geographic Keywords: United Kingdom
Taxonomic Keywords: Piscicola geometra

Rights Statement
This item is published under the licence: Creative Commons Attribution-NonCommercial 3.0 Unported
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Citation of this item should be as follows:
Sweeting, Roger [Photographer] (2016) Fish leech life cycle [image] Freshwater Biological Association [publisher] Permalink:

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