Reproductive biology and relative growth in the spider crab Maja crispata (Crustacea: Brachyura: Majidae)
Keywords:Crustacea, Brachyura, spider crabs, Maja crispata, reproduction, relative growth, Mediterranean Sea
A series of life-history traits in the spider crab Maja crispata were studied on the island of Ischia (Italy) during four sampling periods in 1982: sex ratio, relative growth, sexual maturity, reproductive season, number of eggs per female, copulation and brood sequence. A total of 104 males and 86 females were captured. Mature animals were present year around. The greatest relative abundance of mature animals in both sexes was found in the warmer season. Three postlarval growth stages were distinguishable in males: crabs with juvenile morphological characteristics and immature gonads (between 1.69 and 5.03 cm carapace length), crabs with juvenile morphological characteristics and mature gonads (between 3.59 and 6.11) and crabs with adult morphological characteristics and mature gonads (between 4.98 and 7.16). In females, only two postlarval stages were detected: juveniles (between 1.87 and 4.62) and adults (between 3.56 and 6.11). Mature females with full seminal receptacles were always present. Breeding period extends from May to September. Mean number of eggs was 11473 per female. Breeding sequences in two females kept in the laboratory varied between 5 and 7 broods per year, at intervals of between 21 and 32 days.
How to Cite
Copyright (c) 2003 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.