Chondrichthyes

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Chondrichthyes

a class of the phylum Chordata containing the cartilaginous fish, sharks, rays and chimaeras. In some classifications, the term is synonymous with ELASMOBRANCHII. They are the lowest vertebrates with complete and separate vertebrae, moveable jaws and paired appendages. All are predators and virtually all are marine. They are characterized by the absence of true bone and the presence of CLASPERS (1) in males, and DENTICLES.
References in periodicals archive ?
Roberts, The Central Nervous System of Cartilaginous Fishes: Structure and Functional Correlations, Springer, 1983.
Sharks are classified as chondrichthyans (cartilaginous fishes), one of the most diverse and oldest taxa of vertebrates.
This plan invited member states which have shark fisheries to develop their own action plan for sharks (definition extended to all cartilaginous fishes: sharks, rays and chimaeras) for a sustainable fishery, an efficient data collection, the protection of biodiversity and ecosystems and the surveillance of threatened and vulnerable species.
For most salmonids, cartilaginous fishes, three-spine stickleback, Irish lords (Hemilepidotus spp.), and Pacific mackerel (Scomber japonicus), no otoliths were recovered; therefore other skeletal elements had to be used for identification (Table 2).
Annual landings of cartilaginous fishes, as reported to the UN Food and Agriculture Organization, amount to around 820,000 metric tons.
The following sections deal with different types of seafood - cartilaginous fishes, bony fishes, crustaceans, molluscs and other invertebrates.
Many readers may find that they are surprisingly sympathetic to conservation measure required to maintain diversity and vital ecological roles of these cartilaginous fishes.
Garman settled into the MCZ fish department and was immediately drawn to the cartilaginous fishes, an interest that lasted his entire life.