Not assigned |
Not assigned |
Trichoplacidae
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
Benthic. Tropical
Circumglobal.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm ? range ? - ? cm
Flat (up to 0.5mm in its longest dimension), multicellular, amorphous, mobile flagellated animal lacking body cavity, digestive and nervous systems, composed of 2 layers of epithelial cells. Associated glandular cells apparently secrete digestive enzymes beneath the animal as it sits atop the algae and protozoans on which it apparently feeds; digestion seems to be entirely extracellular , as there is no mouth and no sign of phagocytosis. The much thinner, upper layer of the animal bears flagellated cells, but no gland cells. In a sense, the upper layer is ectodermal, while the lower layer, because of its involvement in digesting food and absorbing nutrients, is endodermal. Between the upper and lower cell layers is a fluid-filled space containing a dense network of fibrous cells that may be contractile (Ref. 53).
Commonly found in warm marine environments (Ref. 57) and in marine aquaria (Ref. 59), on hard bottom substrates in the benthic regions (Ref. 53). A scavenger which feeds on dead animals with its ventral surface, which produces digestive enzymes (Ref. 53), and also feeds on Cryptomonas (Ref. 57 and 60) and algae (Ref. 59); often, individuals contract part of the ventral surface into a sac where digestion may take place more efficiently (Ref. 60).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Reproduces asexually, binary fission, budding (Ref. 60), fragmentation (Ref. 53). Older cultures at high density begin to produce small motile presumptive sperm cells, and as individual animals disintegrate, they spew out ova (Refs. 59, 61).
Collins, A.G. 2000 Intoduction to Placozoa. Tree of Life Web Project. http://www.ucmp.berkeley.edu/phyla/placozoa/placozoa.html (Ref. 60)
Status på IUCN:s rödlista
(Ref. 130435: Version 2025-2 (Global))
CITES-status (Ref. 108899)
Not Evaluated
Not Evaluated
Hot mot människor
Harmless
Mänskliga användningsområden
FAO - Publication: search | FishSource |
Verktyg
Ytterligare information
PopulationsdynamikTillväxt
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Abundans
LivscykelReproduktionKönsmognadFekunditetLekÄggUtveckling av äggLarver MänniskorelateradFrimärken, mynt, diverse.
Internet-källor
Uppskattningar baserade på modeller
Sårbarhet i fisket
(Ref. 71543) |
(0 of 100). |
Priskategori
(Ref. 80766): |
Unknown. |
