polychaete


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Related to polychaete: class Polychaeta

polychaete

any marine ANNELID worm of the order Polychaeta, including both errant (moving) and tubicolous (mainly sedentary) forms. They are characterized by the presence of CHAETAE carried on parapodia (projections from the body) and in errant forms the head is well developed. Fertilization is external. The group includes Nereids (bristle worms such as the ragworm), tube worms and fan worms.
References in periodicals archive ?
Based on analogy with modern polychaete Alitta virens, it is possible that the studied Skolithos burrows were made in a freshly deposited bed of sand during a relatively short period of time.
On the structure and homologues of the anterior end of the polychaete families Sabellidae and Serpulidae.
Spionid polychaete infestations of intertidal pacific oysters Crassostrea gigas (Thunberg), Mahurangi Harbour, northern New Zealand.
Most collections were taken from rocky intertidal regions along the Southern Caribbean coast by breaking fossil or living coralline rocks and removing polychaete specimens.
Macrobenthic species composition in Bakkhali river estuary showed the maximum numbers of Polycheate (46%) followed by gastropods23%, atrhropods-9%, bivalvia-8% and oligochaete-6% where the Meghna river estuary (Figure 5) showed the maximum number of Polychaete (56%) followed by arthropods-20%, oligochaete-12% (Figure 5).
Lake Nhlange had a community dominated by polychaetes, chironomid larvae, amphipods and the bivalve Brachidontes virgiliae (Barnard, 1964).
The sand reefs are a result of an accumulation of the polychaete worm Phragmatopoma lapidosa (Kinberg, 1867), and offer small structural refuges for infaunal organisms (Wilson, 1979).
18] reported that in golf of Gorgan in depth of 1, 2 and 3m streblospio gynobranchiata increase with depth but in our result we did not observe correlation with this specimen and depth and with adding depth TOM is adding last studied showed The density of polychaetes was generally less at high organic carbon area except few species providing a possible indication that, high organic content adversely affect the polychaete abundance and distribution.
In the eastern Bering Sea, Walleye Pollock (Theragra chalcogramma) and Chionoecetes crabs were the main prey items, with minor contributions from polychaete worms, shrimps, and other crabs (Mito 1974; Brodeur and Livingston 1988).
Researchers found that some species of polychaete worms are able to modify their metabolic rates to better cope with and thrive in waters high in carbon dioxide (CO2), which is otherwise poisonous to other, often closely-related species.
The croaker had a more pronounced ontogenetic diet shift, with the smallest size classes (10-25 mm) consuming mostly copepods, and larger juveniles having diets dominated by amphipods, polychaete worms, shrimp, crabs, and fish.
In Gjoa Haven, the most common species among the grab samples were a suspension-feeding bivalve (Astarte montagui), a deposit-feeding bivalve (Yoldia hyperborea), a deposit-feeding polychaete (Scoloplos armiger), and a carnivorous polychaete (Aglaophamus neotenus) (Table 3).