Section 6
Chapter 5,935

Morphometric changes during growth of the brook lamprey lampetra reissneri

Tsuneki, K.; Ouji, M.

Japanese Journal of Ichthyology 31(1): 38-46


ISSN/ISBN: 0021-5090
Accession: 005934588

Download citation:  

The brook lamprey (L. reissneri) was collected at the Hosshoji River, Tottori Prefecture, Japan, once a month for 1 yr. Metamorphosing individuals were collected in autumn and immature adults in winter. Ammocoetes larvae were collected throughout the year. From size-frequency histograms, the larval period was estimated to be more than 3 1/2 yr. Ammocoetes larger than 160 mm in total length were always female. Metamorphosing and adult females were larger than corresponding males. This may mean that at least some females metamorphose 1 yr later than males. In ammocoetes, the relative prebranchial and branchial length decreased and the relative tail length increased during growth. Egg diameter increased rapidly during metamorphosis.

Full Text Article emailed within 1 workday: $29.90