Embryonic development time of Penilia avirostris Dana, 1852 in a tropical bay in Brazil

Brazilian Journal of Biology

J. L. Valentin¹  A. Marazzo¹ 

[1] Universidade Federal do Rio de Janeiro;

关键词: zooplankton;    Cladocera;    Penilia avirostris;    embryonic development;    Guanabara Bay;    Brazil;   

DOI  :  10.1590/S1519-69842004000500020

来源: DOAJ

【 摘 要 】

Development time of embryos in the brood pouch of the cladoceran Penilia avirostris Dana, 1852, was estimated by collecting zooplankton daily for 15 days in surface water of Guanabara Bay, Brazil. Each day the maturity stage of embryos of 90 parthenogenic females was noted. Total development time (egg to birth) varied from 2 to 3 days, the immature phase (stages I to IV) being generally longer (2 days) than intermediate and mature phases (1 day, stages V to XII). Similar results were obtained from Bottrell's equation, which takes water temperature into account.

【 授权许可】

Unknown