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 language | English |
|---|---|
| Pages (from-to) | 496-501 |
| Number of pages | 6 |
| Journal | Journal of Crustacean Biology |
| Volume | 24 |
| Issue number | 3 |
| Publication status | Published - Aug 2004 |
| Externally published | Yes |
Fingerprint
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 journal › Article
}
TY - JOUR
T1 - Reproduction of the alien crayfish species Pacifastacus leniusculus in Lake Shikaribetsu, Hokkaido, Japan
AU - Nakata, Kazuyoshi
AU - Tanaka, Akira
AU - Goshima, Seiji
PY - 2004/8
Y1 - 2004/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=4243140439&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4243140439&partnerID=8YFLogxK
M3 - Article
VL - 24
SP - 496
EP - 501
JO - Journal of Crustacean Biology
JF - Journal of Crustacean Biology
SN - 0278-0372
IS - 3
ER -