A comparison of photographic analyses used to quantify zooxanthella density and pigment concentrations in cnidarians
The zoanthid Palythoa caribaeorum (Duchassaing and Michelotti, 1860) is a cnidarian
commonly found on reefs in the Caribbean region and Brazil (Mueller and Haywick, 1995).
These embryos are of uncertain affinities, but they may represent stem cnidarians
(the phylum including "jellyfish," anemones, and corals) or even bilaterians (animals with bilateral symmetry).
That is why it is also popularly labeled as 'cansancao', a term which is used to designate cnidarians
and terrestrial plants (stinging nettle, Urticaceae) that cause a burn sensation.
The survival of zoanthids under low salinities is directly related to the ability of diluting the body fluids in cnidarians
Percent of Total Known Marine Species by Taxonomic Group Taxonomic Group Percent CRUSTACEANS (lobsters, shrimp, krill) 19 MOLLUSKS (squid, clams, snails) 17 FISH (cod, catfish, tuna) 12 ALGAE (and other plantlike organisms) 10 PROTOZOA (unicellular microorganisms) 10 CNIDARIANS
(jellyfish, corals, hydra) 5 ECHINODERMS (starfish, sea urchins, sea cucumbers) OTHER VERTEBRATES (seals, seabirds, turtles) 2 OTHER INVERTEBRATES (sponges, sea squirts, worms) 22 SOURCE: CENSUS OF MARINE LIFE
A total of 78 different species were found throughout this study, including polychaete worms (28 species), bivalves (11 species), amphipods (10 species), crabs (7 species), fishes (6 species), shrimps (2 species), cnidarians
(1 species), and isopods (1 species).
10:45 A PRELIMINARY REPORT ON IDENTIFYING CNIDARIANS
USING MOLECULAR TECHNIQUES
Abstract: A suite of fossils collected from the Warsaw Formation (Mississippian) of Missouri includes brachiopods, bryozoans, cnidarians
, poriferans, echinoderms, and chondrichthyan teeth.
Where the seabed consists of rocks, mobile fishing gear removes large epifaunal invertebrates (such as sponges, cnidarians
, and bryozoans) and moves boulders along the bottom.
The new titles are Anthropods, Cnidarians
, Exploring Biology, Genetic Engineering, Human Impacts on the Environment, Mollusks, Sponges and Vertebrates, as well as an upgraded program titled Inside the Cell.
Disturbance, colonial fragmentation, and size-dependent life history variation in two coral reef cnidarians
This number of larvae was well below the number of ascidian larvae that may be ingested daily by benthic cnidarians
in the field (Sebens and Koehl 1984).
The series will devote hour-long programs to eight of the major body plans--sponges, cnidarians
(jellyfish and kin), flatworms, mollusks, annelids (earthworms) arthropods (insects, spiders, lobsters), echinoderms (starfish, sea urchins) and chordates (fish, birds, humans).
For the functional position of HO, amino acid sequences of HO from cnidarians
, teleosts, human, insects, polychaeta, ascidians, and Syinbiodinium were retrieved from the nr database of the NCBI.