EFFECTS OF A JUVENILE HORMONE MIMIC ON MALE AND FEMALE GAMETOGENESIS OF THE MUD-CRAB,RHITHROPANOPEUS HARRISII(GOULD) (BRACHYURA: XANTHIDAE)
Open Access
- 1 April 1977
- journal article
- research article
- Published by University of Chicago Press in The Biological Bulletin
- Vol. 152 (2) , 199-208
- https://doi.org/10.2307/1540559
Abstract
Effects of ingestion and topical application of 1.30 ppm methoprene, an insect juvenile hormone (JH) mimic, include gametogenetic disorders in both male and female mud-crab R. harrisii. Progressive inhibition of vitellogenesis and stimulation of spermatogenesis take place after a short exposure time (12-15 days), while a longer period (30-45 days) promotes inhibition of spermatogenesis and vitellogenesis, demonstrating the chemosterilant action of methoprene on crustaceans. Stoppage of vitellogenesis is characterized by oocyte block at terminal previtellogenesis and proliferation of the follicle cells involved in vitellogenic oocyte lysis. Spermatogenic degeneration begins with spermatocyte clusters in meiotic prophase and pycnosis of gonia. Analogies between these results and those obtained from experiments involving androgenic gland implants or the consequences of their hyperfunctioning are discussed.This publication has 1 reference indexed in Scilit:
- The mandibular organ of the lobster, Homarus americanusCell and tissue research, 1975