Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Environment: milieu / climate zone / depth range / distribution range Écologie

. Subtropical

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Introductions

Arctic, Northeast Atlantic and the Mediterranean: Sweden, Norway, Ireland and Malta.

Length at first maturity / Taille / Poids / Âge

Maturity: L_m ? range ? - ? cm Max length : 15.0 cm TL mâle / non sexé; (Ref. 358)

Description synthétique Morphologie

The worm is provided with an appendix; is located on the head; or misleads, which, deployed, conferred on the species a size of about 150 cm, forked in its end, of a scale of 50 cm and whose edges are corrugated. Body: plum shape; 15 cm length. Males and females have an extremely different morphology. The males: 0.1- 0.3 cm length: they have neither horn nor intestine; and live in parasite in the esophagus of the female: only one can lodge some up to 85 (Ref. 358).

Infralittoral zone; lives on hard bottoms, (Ref. 772) in anfractuosities and excavations on hard funds, interstices between stones and rollers. Females always seen occupying anfractuosities of rocks or all other benthic niche. For nourishment, they use horns equipped to palpate ground and consume microorganisms or organic matter of various origins. Nutritive particle coated with mucus before being introduced (Ref. 358). Sex of the larvae swimmer not given of start: if one larva comes into contact with horn of female, it is introduced as food particle; inside body of this female, hormonal processes make larva evolve into nanifié male. If on the contrary it manages to take refuge in anfractuosities, larva evolves into female. This mode of development guarantees a balanced population (Ref. 358).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

The sex of the larvae swimmer is not given of start: if one as of the these larvae comes into contact with the horn of a female, it will be introduced as well as a food particle; inside the body of this female, hormonal processes make evolve/move this larva in nanifié male. If on the contrary it manages to take refuge in an anfractuosities, the larva evolves/moves in female. This mode of development guarantees a balanced population (Ref. 358).

Référence principale Références | Coordinateur | Collaborateurs

Göthel, H. 1992. (Ref. 358)

Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2024-1)

Non évalué

statut CITES (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

Utilisations par l'homme

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Trophic Ecology

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Estimates based on models

Preferred temperature (Ref. 115969): 7 - 15.3, mean 10.1 (based on 477 cells).

Vulnérabilité (Ref. 71543): Low vulnerability (10 of 100).

Catégorie de prix (Ref. 80766): Unknown.

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