Results 231 to 240 of about 22,890 (272)

Mechanisms of locomotion in the polychaete, Harmothoë

Comparative Biochemistry and Physiology, 1970
1. 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.
James V. Lawry, James V. Lawry
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Longevity in a Polychaete and a Coelenterate [PDF]

Nature, 1963
IN December 1949 I collected a small group of the serpulid Mercierella enigmatica Fauvel, which lives in brackish-water as well as in the sea, growing on reeds in Lake Mariout, Alexandria, Egypt. I brought the dozen or so of the tube-worms back to London and kept them alive for a number of years in a small aquarium containing sea-water diluted half-and-
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Polychaete Bioturbation Alters the Taxonomic Structure, Co-occurrence Network, and Functional Groups of Bacterial Communities in the Intertidal Flat

Microbial Ecology, 2022
Jinghui Fang, Wenwen Jiang, Sha Meng, Wei He, Guodong Wang, E. Guo, Yisu Yan   +6 more
semanticscholar   +1 more source

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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Amphipacific Distribution of Polychaetes

Journal of the Fisheries Research Board of Canada, 1971
Some 25 polychaete species common to Asiatic and American coasts are recorded in south-boreal and subtropical waters of the Pacific; they are absent in both northern cold regions (Bering and Okhotsk seas) and in tropical zones. Examples are also given of analogous, closely related twin species, and subspecies.
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Sex economy in benthic polychaetes

Ethology Ecology & Evolution, 1995
Among polychaetes sequential hermaphrodites are generally protandrous and their sex allocation strategy appears to fit well with the Ghiselin size advantage hypothesis. In Ophryotrocha puerilis male reproductive success drops with increasing size because females prefer to mate with small males to avoid a costly conflict over sex. Moreover both partners
M. Premoli, SELLA, Gabriella
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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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Methods of Culturing Polychaetes

1975
The 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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Polychaete diversity in the Scotia Arc benthic realm: Are polychaetes tracers for faunal exchange?

Polar Biology, 2015
The Scotia Arc is the only shallow-water and island bridge linking nowadays Patagonia and the Antarctic. The Antarctic Circumpolar Current as an oceanographic peculiarity makes this region an interesting biogeographic transition zone, because this frontal system traditionally is said to isolate the Antarctic fauna from that of the adjacent northern ...
Américo Montiel, Eduardo Quiroga, Dieter Gerdes, Brigitte Ebbe   +3 more
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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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