Aspects of Life History and of Territorial Behavior in Young Individuals of Platynereis bicanaliculata and Nereis vexillosa (Annelida, Polychaeta)

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dc.contributor.author Roe, Pamela
dc.date.accessioned 2008-05-15T06:48:18Z
dc.date.available 2008-05-15T06:48:18Z
dc.date.issued 1975-10
dc.description.abstract Plarynereis bicanaliculata (Baird), an annual nereid, spawned in early August at two areas in Washington state. Spawning was highly synchronous. Young were planktonic for about 1 week. Within 3 weeks they had grown to 4 mm in length, had started building tubes of mucus and diatoms, and showed a period of rapid growth in size. By the end of September or early October they averaged 10 mm in length, at which size they remained until March. In spring they reached adult length (20-23 mm) and during the summer gametes developed. Nereis vexillosa Grube egg masses were found from March through August. Nereis has a 2-year life span in both study areas, growing to one-half adult size the 1st year and to mature size the 2nd year. In the laboratory, young made tubes within 1 week after hatching from egg masses. Members of both species defend their tubes from intruders. Usually, larger individuals win fighting encounters, especially if they are the occupants of tubes. Small individuals successfully defend their tubes from larger individuals in about onehalf of the encounters; and if fights occur between equal sized individuals, occupants are usually not displaced. Fights are real, with jaws used much for biting, and smaller individuals are sometimes actually eaten by larger ones, especially In Nereis vexillosa. In the laboratory the number of individuals of N. vexillosa kept in fingerbowls decreased in number until only one or two large individuals remained.
dc.identifier.citation Roe P. 1975. Aspects of life history and of territorial behavior in young individuals of Platynereis bicanaliculata and Nereis vexillosa (Annelida, Polychaeta). Pac Sci 29(4): 341-348.
dc.identifier.issn 0030-8870
dc.identifier.uri http://hdl.handle.net/10125/1512
dc.language.iso en-US
dc.publisher University of Hawaii Press
dc.title Aspects of Life History and of Territorial Behavior in Young Individuals of Platynereis bicanaliculata and Nereis vexillosa (Annelida, Polychaeta)
dc.type Article
dc.type.dcmi Text
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Pacific Science Volume 29, Number 4, 1975