Reproduction of the alien crayfish species Pacifastacus leniusculus in Lake Shikaribetsu, Hokkaido, Japan

Kazuyoshi Nakata, Akira Tanaka, Seiji Goshima

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The reproduction of the alien crayfish species Pacifastacus leniusculus inhabiting Lake Shikaribetsu, Hokkaido, Japan, was studied from August 2002 to August 2003. Spawning was for a short period after mating in mid October. The eggs developed to eyed stage in June the following year and hatched in mid July. After remaining with their mother for several weeks, the juveniles became independent between late July and August. The egg numbers attached to pleopods of this crayfish significantly increased with the female body size. The time of spawning in Lake Shikaribetsu was similar to that of this crayfish living in North America and Europe reported by previous studies, but the time of egg hatching was later in Lake Shikaribetsu compared with some populations in North America and Europe. A comparison of our results of the reproduction of P. leniusculus with that of the endangered Japanese endemic crayfish species Cambaroides japonicus reported by previous studies showed that P. leniusculus has a markedly higher reproductive ability than C. japonicus in terms of egg numbers.

Original languageEnglish
Pages (from-to)496-501
Number of pages6
JournalJournal of Crustacean Biology
Volume24
Issue number3
Publication statusPublished - Aug 2004
Externally publishedYes

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Pacifastacus leniusculus
crayfish
Japan
egg
lakes
lake
spawning
hatching
body size
reproductive performance
North America
Europe

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Reproduction of the alien crayfish species Pacifastacus leniusculus in Lake Shikaribetsu, Hokkaido, Japan. / Nakata, Kazuyoshi; Tanaka, Akira; Goshima, Seiji.

In: Journal of Crustacean Biology, Vol. 24, No. 3, 08.2004, p. 496-501.

Research output: Contribution to journalArticle

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