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Bristleworm

Cirratulus cirratus (O. F. Müller 1776)

Breeding Season

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
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Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Care of Adults

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
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Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Cleavage

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
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cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Later Stages of Development

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
license
cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Living Material

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine

Reference

Mead, A. D., 1898. The breeding of animals at Woods Holl during the month of April, 1898. Science, 7:.

license
cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Preparation of Cultures

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
license
cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Rate of Development

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
license
cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Special comments

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
license
cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

The Unfertilized Ovum

provided by Egg Characteristics and Breeding Season for Woods Hole Species
Woods Hole, Maine
license
cc-by-nc-sa-3.0
copyright
Donald P. Costello and Catherine Henley
bibliographic citation
Costello, D.P. and C. Henley (1971). Methods for obtaining and handling marine eggs and embryos. Marine Biological Laboratory, Woods Hole, MA (Second Edition)
author
Costello, D.P.
author
C. Henley

Cirratulus cirratus

provided by wikipedia EN

Cirratulus cirratus is a species of marine polychaete worm in the family Cirratulidae. It occurs in the littoral and sub-littoral zones of the Atlantic Ocean.

Polychaetes, or marine bristle worms, have elongated bodies divided into many segments. Each segment may bear setae (bristles) and parapodia (paddle-like appendages). Some species live freely, either swimming, crawling or burrowing, and these are known as "errant". Others live permanently in tubes, either calcareous or parchment-like, and these are known as "sedentary".

Description

Cirratulus cirratus grows to up to thirty centimetres long with up to 150 segments. It has a slender, orange, pinkish or brownish body. The prostomium or head is a blunt cone with a row of 4 to 8 large black eyes on either side. The first segment bears two groups of up to eight feeding tentacles. At intervals along the body there are pairs of long slender gills which look like a mass of reddish threads.[2] Short, blunt bristles are found on segments 10 to 12 and more on segments 20 to 23.[3]

Distribution and habitat

Cirratulus cirratus is found along the coasts of north west Europe and also in the south Atlantic Ocean. It mostly occurs living in burrows on the lower shore in mud or muddy sand, often underneath or between rocks.[2]

Biology

Cirratulus cirratus is a filter feeder, catching particles floating past with its tentacles and conveying them to its mouth.[2]

The sexes are separate and the worms become sexually active spasmodically at intervals of one to two years. The males are white at this time and the females yellowish due to the oocytes in their coelom.[4] Once the oocytes have been fertilised, they are stuck to rocks in a jelly-like mass. They hatch after six days into ciliated post-trochophore larvae. These live off the yolk sac for about twenty-four days before settling and starting filter feeding.[5] Asexual reproduction by means of clones growing from the posterior of the worm have been recorded, but the taxonomic status of Cirratulus is under constant review and this report may refer to a different species.[6]

References

  1. ^ World Register of Marine Species
  2. ^ a b c "Marine Life Information Network". Archived from the original on 2012-04-02. Retrieved 2011-07-01.
  3. ^ Marine Species Identification Portal
  4. ^ Gibbs, P.E., (1971). Reproductive cycles in four polychaete species belonging to the family Cirratulidae. Journal of the Marine Biological Association of the United Kingdom, 51, 745-769.
  5. ^ Reproduction of a Northumberland population of the polychaete Cirratulus cirratus
  6. ^ Petersen, M.E., (1999). Reproduction and development in Cirratulidae (Annelida: Polychaeta). Marine Biology, 8, 243-259.
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Cirratulus cirratus: Brief Summary

provided by wikipedia EN

Cirratulus cirratus is a species of marine polychaete worm in the family Cirratulidae. It occurs in the littoral and sub-littoral zones of the Atlantic Ocean.

Polychaetes, or marine bristle worms, have elongated bodies divided into many segments. Each segment may bear setae (bristles) and parapodia (paddle-like appendages). Some species live freely, either swimming, crawling or burrowing, and these are known as "errant". Others live permanently in tubes, either calcareous or parchment-like, and these are known as "sedentary".

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Wikipedia authors and editors
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Distribution

provided by World Register of Marine Species
northern Gaspe waters, downstream part of middle St. Lawrence estuary, lower St. Lawrence estuary, Lower North Shore; Magdalen Islands (from eastern Bradelle valley to the west, as far as Cape North, including the Cape Breton Channel); Cobscook Bay to Cape Cod

Reference

North-West Atlantic Ocean species (NWARMS)

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WoRMS Editorial Board
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Kennedy, Mary [email]

Habitat

provided by World Register of Marine Species
intertidal and infralittoral of the Gulf and estuary

Reference

North-West Atlantic Ocean species (NWARMS)

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cc-by-4.0
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WoRMS Editorial Board
contributor
Kennedy, Mary [email]