Florideophyceae |
Gigartinales |
Nemastomataceae
Environment: milieu / climate zone / depth range / distribution range
Ecology
Sessile. Tropical
Atlantic Ocean: In Puerto Rico south to Colombia and Venezuela, including the Caribbean, east to the Canary Islands; Indian Ocean: In Oman and South Africa east to Western Australia; Pacific Ocean: In Micronesia and Fiji, east to Easter Island including the Hawaiian Islands.
Length at first maturity / Size / Weight / Age
Maturity: Lm ? range ? - ? cm
The gelatinous thallus is about 3.5 cm high, irregularly branched with numerous short, blunttapering branchlets. The colour is pale pinkish in situ. The thallus is multiaxial, composed of a filamentous medulla and cortex embedded in a gelatinous matrix. The cortical filaments are dichotomously branched, with rectilinear cells, 4-5 μm wide by 8-13 μm long. Gland cells are absent. Carpogonial branches are 3-celled. Auxiliary cells are placed intercalary in cortical filaments and uteriform in shape with a prominent apical bulge. Nutritive cells, grouped per 3-6 in chains 1-3 cells long, are present on the cortical cells immediately below and on the 2 cells distal to the auxiliary cell. The gonimoblast arises apically from the auxiliary cell and not laterally in conjunction with the connecting filament. Male gametophytes were not observed (Ref. 82093).
Predaea weldii is characterised by its rectilinear-shaped cortical cells, the lack of gland cells, the relatively sparse and large nutritive cells and the gonimoblasts, which arise apically from the auxiliary cells (Ref. 82093). Occurs on volcanic rocks at shallow intertidal to subtidal depths (Ref. 80999). Also on coral rubble (Ref. 82093).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Guiry, M.D. and G.M. Guiry 2009 AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 14 April 2009. (Ref. 80701)
IUCN Red List Status
(Ref. 130435: Version 2025-1)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Threat to humans
Human uses
| FishSource |
Tools
More information
Trophic EcologyFood items (preys)
Diet composition
Food consumption
Predators
Population dynamicsGrowth
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundance
Life cycleReproduction
Maturity
Fecundity
Spawning
Eggs
Egg development
Larvae
PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
Internet sources
Estimates based on models
Preferred temperature
(Ref.
115969): 24.7 - 27.3, mean 26.3 (based on 20 cells).
