Results 211 to 220 of about 11,201 (250)

Polychaete aquaculture and polychaete science: a mutual synergism

Hydrobiologia, 1999
In 1984, the commercial aquaculture of the polychaete Nereis virens was initiated in NE England, at about the same time similar developments took place in the Netherlands, both establishing alternative sources of this animal as a means of supplying existing markets for marine worms to be used as bait by sea anglers.
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Polychaete/amphipod ratio revisited

Marine Pollution Bulletin, 2007
In this paper, we reexamine the opportunistic polychaete/amphipod ratio, modifying it to allow estuarine and coastal communities to be divided into the five classes suggested by the European Water Framework Directive (WFD). The resulting biological index, called the BOPA index, considers the total number of individuals collected in the samples, the ...
Dauvin, Jean-Claude, Ruellet, T.
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Products of haem synthesis in polychaetes

Comparative Biochemistry and Physiology, 1965
Abstract 1. 1. The tetrapyrrole pigments accumulated by annelid polychaetes have been extracted and identified. 2. 2. The haemoglobin- and chlorocruorin-synthesizing tissues contain large amounts of free porphyrins and corresponding haematins. The same compounds may also be found in other tissues. Traces of free porphyrin exist in the blood.
C P, Mangum, R P, Dales
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Behavior in Polychaetes

The Quarterly Review of Biology, 1971
It is suggested that, because of their relatively simple repertoires of behavior, polychaetes may be particularly useful in behavioral research. An interesting range of responses has already been described in these animals, including those involved in habitat selection, feeding, tube construction, escape from predators, fighting, pairing, swarming ...
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Bioluminescence in Pelagic Polychaetes

Journal of the Fisheries Research Board of Canada, 1971
Of six holopelagic polychaete families, the Tomopteridae and Alciopidae are the only ones having representatives that appear to be photogenic. Previous investigators localized the site of photogenic organs to certain parapodial glands in the tomopterids. Photogenic organs have not been demonstrated in the alciopids, but some species have been reported
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A laboratory investigation of the effect of a terebellid polychaete on the survivorship of nereid polychaete larvae

Journal of Experimental Marine Biology and Ecology, 1980
Abstract A controlled laboratory experiment showed that the survivorship of the larvae of Nereis vexillosa Grube is significantly lowered by the feeding activities of Eupolymnia heterobranchia (Johnson). Ingestion of larvae by Eupolymnia is suggested as the mechanism of this interaction. E.
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The metabolism of iodine by a polychaete

Comparative Biochemistry and Physiology, 1970
Abstract 1. 1. Nereis diversicolor contains between 23 and 30 μg of iodine per g. 2. 2. Iodide is absorbed at about 5 ng/g per day under conditions approximating to the normal environment. 3. 3. Most of this is subsequently lost in mucus secreted, but 15 to 30 per cent becomes bound in the basal regions of the chaetae where tanning is ...
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Polychaete Sibling Species

1980
Capitella capitata was formerly regarded as an excellent cosmopolitan indicator species for marine pollution or environmental disturbance. Following an oil spill in West Falmouth, Massachusetts in September 1969, when most of the benthic marine fauna was killed, the subsequent responses of a number of polychaete and other invertebrate species allowed ...
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The Coelomocytes of Nereid Polychaetes

1974
The coelomic fluids of most polychaetes, or marine annelids, contain numerous mobile cells which have phagocytic abilities. Many investigators have observed that coelomocytes of several species of polychaetes take up foreign matter and have suggested that they probably remove particulate wastes. This applies equally to nereids (Dehorne, 1922a,b; Romieu,
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Taxonomy and phylogeny of polychaetes

2010
Polychaetes are a large group of segmented worms that display an enormous morphological diversity. Molecular data has shown in recent years that groups previously thought to be separate from polychaetes are actually part of the group. The relationships within polychaete groups have been difficult to discern, and molecular data only partly corroborate ...
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