Japanese nephropid lobster Metanephrops japonicus lacks zoeal stage
Version of Record online: 1 FEB 2008
© 2008 Japanese Society of Fisheries Science
Volume 74, Issue 1, pages 98–103, February 2008
How to Cite
OKAMOTO, K. (2008), Japanese nephropid lobster Metanephrops japonicus lacks zoeal stage. Fisheries Science, 74: 98–103. doi: 10.1111/j.1444-2906.2007.01500.x
- Issue online: 1 FEB 2008
- Version of Record online: 1 FEB 2008
- Received 4 October 2006. Accepted 27 August 2007.
- Metanephrops japonicus;
- nephropid lobster;
ABSTRACT: Larvae of the Japanese nephropid lobster Metanephrops japonicus hatched in the laboratory were reared at 15°C, and the development and feeding were observed. All larvae hatched at the ‘prezoea stage’ with no natatory setae on the exopodite of the pereiopods. Without feeding, 50% of prezoea molted into the megalopa stage, having small buds as the exopodite, within 1 h and all molted within 22 h. The megalopa fed with Artemia nauplii, shrimp meat and pelleted food molted into the first juvenile stage with no exopodite after approximately 17 days. The average carapace lengths of prezoea, megalopa and the first juvenile stage were 3.2, 3.6 and 4.4 mm, respectively. The survival rate from hatching to the first juvenile stage was high (90–100%). This lobster may be the only known nephropid species with no zoeal stage.