Scyphozoa |
Rhizostomeae |
Rhizostomatidae
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
Pelagisch; tiefenbereich 0 - 176 m (Ref. 122799). Subtropical; 52°N - 29°N, 117°E - 142°E (Ref. 121705)
Northwest Pacific: endemic to the East Asian Marginal Seas.
Länge bei der ersten Reifung / Größe / Gewicht / Alter
Geschlechtsreife: Lm ? range ? - ? cm Max length : 200 cm WD Männchen/unbestimmt; (Ref. 99323); max. veröff. Gewicht: 200.0 kg (Ref. 3010); max. veröff. Alter: 1.00 Jahre (Ref. 100320)
One of the largest jellyfish species (Ref. 3010). Occurrence of jellyfish bloom has threatened the fisheries in Japan since early 2000s, possibly because of global warming - note that the growth of medusae are dependent on high temperatures (Ref. 100320). Occurs in semi-enclosed basins of marginal seas (Ref. 122853) and also found offshore (Ref. 122855). Before the chitin-covered podocysts develop into adults, they remain dormant for at least 6 years. Jellyfish blooms occur by mass excystment of these podocysts upon exposure to high temperatures (Ref. 100312).
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
Life cycle: Fertilized egg develops into a planula larva after 1 day. Planula swims for 4 to 8 days until it becomes a translucent, whitish and dome-shaped scyphistoma and settles at the bottom. Becomes a fully-developed scyphistoma after 10 to 20 days of settlement. Also exhibits asexual reproduction by means of podocyst formation (as many as 18 podocysts on a single original scyphistoma within 7 days to 3 months). Scyphistoma colony develops from podocyst of original scyphistoma within 6 months at 18°C. Fully-developed scyphistoma develops into a strobila after a day and becomes a liberated ephyra with 5 to 7 days. Becomes a fully-developed metaphyra within 30 days of post-liberation and becomes a young medusa within 40 to 50 days of post-liberation (Ref. 3004). Furthermore, ephyrae are released into the plankton during early summer. After subsequent sexual reproduction, the medusae die during winter. The life span of the medusae is less than a year (Ref. 100320).
Kawahara, M., S.-I. Uye, K. Ohtsu and H. Iizumi 2006 Unusual population explosion of the giant jellyfish Nemopilema nomurai (Scyphozoa: Rhizostomeae). Mar. Ecol. Prog. Ser. 307:161-173. (Ref. 3004)
IUCN Rote Liste Status
(Ref. 130435: Version 2025-2 (Global))
CITES Status (Ref. 108899)
Not Evaluated
Not Evaluated
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: kommerziell
FAO - Publication: search | FishSource |
Tools
Mehr Information
PhysiologieSauerstoffverbrauch
MenschenbezogenBriefmarken, Münzen, Verschiedenes.
Internet Quellen
Schätzungen auf der Grundlage von Modellen
Anfälligkeit der Fischerei
(Ref. 71543) |
Moderate to high vulnerability (50 of 100). |
Preiskategorie
(Ref. 80766): |
Unknown. |
![Image of Nemopilema nomurai (Nomura\](/images/thumbnails/jpg/Tn_Nenom_u0.jpg "Image of Nemopilema nomurai (Nomura\")