Physiological aspects of the life cycle of the river lamprey, Lampetra fluviatilis L

Pickering, A.D. (1978) Physiological aspects of the life cycle of the river lamprey, Lampetra fluviatilis L. In: Forty-sixth annual report for the year ended 31st March 1978. Ambleside, UK, Freshwater Biological Association, pp. 40-46. (Annual Report, Freshwater Biological Association, Ambleside)

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Abstract

The life cycle of the river lamprey, L. fluviatilis, is reviewed. The larval lamprey, or ammocoete, is a blind, filter-feeding animal, which normally lies concealed in the silt deposits of streams and rivers. After a period of 3-5 years in fresh water the ammocoete undergoes a metamorphosis in the summer months into a sexually immature, non-feeding stage known as the macrophthalia, which is active. This stage migrates downstream in late winter. It adopts a parasitic existence, in intertidal areas. After 18 months it returns to spawn in fresh water, after a final freshwater stage lasting up to 9 months. The river lamprey dies within a few days after the spawning period of 3-4 weeks, and none survive to spawn the following year.

Item Type: Book Section
Title: Physiological aspects of the life cycle of the river lamprey, Lampetra fluviatilis L
Personal Creator/Author:
CreatorsEmail
Pickering, A.D.
Title of Book: Forty-sixth annual report for the year ended 31st March 1978
Refereed: No
Series Name: Annual Report, Freshwater Biological Association, Ambleside
Page Range: pp. 40-46
Date: 1978
Publisher: Freshwater Biological Association
Place of Publication: Ambleside, UK
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Life cycle; Physiology; Lampetra fluviatilis; Annual report
Subjects: Biology
Ecology
Fisheries
Item ID: 5172
Depositing User: Mrs Christine Davey
Date Deposited: 10 May 2011 17:13
Last Modified: 29 Sep 2011 15:18
URI: http://aquaticcommons.org/id/eprint/5172

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