Not assigned |
Not assigned |
Trichoplacidae
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
Benthic. Tropical
Circumglobal.
Lunghezza alla prima maturità / Dimensione / Peso / Età
Maturità: 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).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
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 (Fonte Biblio. 60)
Stato della Lista Rossa IUCN
(Fonte Biblio. 130435: Version 2025-2 (Global))
Stato della CITES (Fonte Biblio. 108899)
Not Evaluated
CMS (Fonte Biblio. 116361)
Not Evaluated
Minaccia per l'uomo
Harmless
Usi umani
FAO - Publication: search | FishSource |
Strumenti
Informazioni ulteriori
Dinamica della popolazioneAccrescimento
Età massima / dimensioni massime
Rapporto lunghezza-peso.
Lunghezza-lunghezza rel.
Lunghezza-frequenze
Conversione di massa
Abbondanza
Ciclo di vitaRiproduzioneMaturitàFeconditàDeposizioneUovaSviluppo delle uovaLarve FisiologiaConsumo di ossigeno
Legato all'uomoFrancobolli, monete, materiale vario.
Fonti Internet
Stime basate su modelli
Vulnerabilità della pesca
(Fonte Biblio. 71543) |
(0 of 100). |
Categoria di prezzo
(Fonte Biblio. 80766): |
Unknown. |
