Results 191 to 200 of about 11,122 (238)
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Polychaete aquaculture and polychaete science: a mutual synergism
Hydrobiologia, 1999In 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, 2007In 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, 1965Abstract 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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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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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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A census of abyssal polychaetes
Deep Sea Research Part II: Topical Studies in Oceanography, 2009Abstract As part of the Census of Marine Life's programme of summarising existing knowledge of the oceans, records of all polychaete species collected below 2000 m have been collated from the literature. A total of 3633 records was assembled into a database, revealing that 768 species, 358 of which were new to science, have been reported from the ...
Paterson, Gordon L.J. +6 more
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Proceedings / Indian Academy of Sciences, 1949
1. A detailed study of the eyes of a few common polychaetes of Madras with different habits has been carried out giving a brief comparison of their structure with that of allied forms from European waters. 2. The eye in Eunicidae is usually composed of a retinal cup and a central refractive body which consists of a localised thickening ...
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1. A detailed study of the eyes of a few common polychaetes of Madras with different habits has been carried out giving a brief comparison of their structure with that of allied forms from European waters. 2. The eye in Eunicidae is usually composed of a retinal cup and a central refractive body which consists of a localised thickening ...
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Problems in polychaete systematics
Hydrobiologia, 2003Some of the intriguing issues in current polychaete systematics are reviewed. (1) The root of the ‘polychaete’ tree. Currently there are two major hypotheses concerning the root position among polychaetes. One is based on rooting cladograms with outgroups such as Mollusca and result in simple-bodied taxa such as Opheliidae and Questidae forming a basal
Rouse, Greg W., Pleijel, Fredrik
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Mechanisms of locomotion in the polychaete, Harmothoë
Comparative Biochemistry and Physiology, 19701. 1. During forward walking parapodial stepping and s waves occur; the two can be separated by sectioning appropriate segmental nerves. 2. 2. Thirty cycles of stepping begin at the pygidium/min and move rostrally over 3–10 segments/sec. 3. 3.
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Methods of Culturing Polychaetes
1975The purpose of this paper is neither to review the literature on polychaete reproduction nor to describe the diverse reproductive habits and developmental stages that occur among polychaetes. Rather, this is an attempt to summarize the “do’s, don’t’s, and probably’s” pertaining to the successful culture of this fascinating group of marine invertebrates.
David Dean, Michael Mazurkiewicz
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