Thecostraca |
Rhizocephala |
Duplorbidae
Environment: milieu / climate zone / djupintervall / distribution range
Ekologi
. Temperate
Northeast Pacific: U.S.A.
Length at first maturity / Size / Weight / Age
Könsmognad: Lm ? range ? - ? cm
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Eggs | Fecundity | Larvae
Members of the order Akentrogonida are gonochoric. Life cycle: Nauplius larvae molt into cyprids. The female settles on a host and metamorphose into vermigon larva and then into an interna which lies into the host's cuticle. It then develops into an externa lying outside the host's abdomen. The male cypris larvae attaches to the female externa, the male then molts into a dwarf male (trichogon larva) and remains as a testis parasitic on the female. Fertilization occurs and the externa becomes the egg sac filled with fertilized eggs.
Høeg, J.T. and A.V. Rybakov 1992 Revision of the Rhizocephala Akentrogonida (Cirripedia), with a list of all the species and a key to the identification of families. Journal of Crustacean Biology 12(4):600-609. (Ref. 8255)
IUCN Red List Status
(Ref. 130435: Version 2025-1)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Threat to humans
Human uses
| FishSource |
Verktyg
Ytterligare information
Trophic EcologyFood items (preys)
Födosammansättning
Födointag
Predatorer
Population dynamicsTillväxt
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundans
PhysiologySyreförbrukning
Human RelatedStamps, coins, misc.
Internet-källor
Estimates based on models
Price category
Unknown.
