Cyclomorphism in Bosmina longirostris (Crustacea:Cladocera) from Lake Ikeda, Japan

Shaharudin Abdul Razak, and Toshio Saisho, (2011) Cyclomorphism in Bosmina longirostris (Crustacea:Cladocera) from Lake Ikeda, Japan. Sains Malaysiana, 40 (6). pp. 543-547. ISSN 0126-6039


Official URL:


Zooplankton were sampled in Lake Ikeda at a fixed station every month with the aid of a plankton net in order to observe whether cyclomorphism was exhibited by the neonates of Bosmina longirostris. In Lake Ikeda the relative sizes of the antennules and mucrones of B. longrostris neonates decreased in relation to carapace length from 65% in winter to 50% in summer. Mucrone lengths also decreased from 30% in winter to 20% in summer. Both appendages were inversely correlated with surface temperature of the lake. Predation seems to be one of the reasons why neonates of B. longirostris exhibited seasonal cyclomorphism in their antennule and mucrone

Item Type:Article
Keywords:Antennules; Bosmina longirostris; cyclomorphism; mucrone; neonate
Journal:Sains Malaysiana
ID Code:2497
Deposited By: Mr Azam
Deposited On:03 Aug 2011 03:54
Last Modified:14 Dec 2016 06:31

Repository Staff Only: item control page