NIWA Guide to Polychaeta | Shore polychaetes | Pick shore family | Shell polychaetes

Biology of Polydora cornuta

(Relevant references with species biology information)

Jelsing, J. (2003).
  Ultrastructural studies of dorsal ciliated organs in Spionidae (Annelida: Polychaeta). Hydrobiologia 496: 241-251.
 Relevant content: Includes Polydora cornuta. The distribution and structural components of dorsal ciliated organs (dco) in 15 species of the Spionidae were studied by scanning- and transmission electron microscopy.

Light, W.J. (1978).
  Invertebrates of the San Francisco Bay Estuary System. Spionidae. Polychaeta Annelida. xxxx xxxx: 211.
 Relevant content: As P. ligni. Summarises taxonomy and biology to that date.

MacKay, J.;Gibson, G. (1999).
  The influence of nurse eggs on variable larval development in Polydora cornuta (Polychaeta, Spionidae). Invertebrate Reproduction and Development 35: 167-176.
 Relevant content: Larval development in Polydora cornuta includes both planktotrophic and adelphophagic trophic modes. Planktotrophic females produce broods in which all eggs develop and offspring hatch as small, 3-setiger larvae. Adelphophagic females produce broods in which 95% of the eggs are non-developing nurse eggs, which are ingested by the developing offspring. Three females (of 40) ''switched'' between adelphophagy and planktotrophy either between sequential broods or by producing both types of capsules in a single brood.

Read, G.B.;Gordon, D.P. (1991).
  Adventive occurrence of the fouling serpulid Ficopomatus enigmaticus, Polychaeta, in New Zealand. New Zealand Journal of Marine and Freshwater Research 25: 269-274.
 Relevant content: As well as first occurrence report for Ficopomatus enigmaticus, is first report of Polydora cornuta

Rice, S.A.;Simon, J.L. (1980).
  Intraspecific variation in the pollution indicator polychaete Polydora ligni (Spionidae). Ophelia 19: 79-115.
 Relevant content: Five populations of Polydora cornuta from Florida USA were compared morphologically and genetically; 3 of them were also analyzed for differences in reproduction and physiological response. Morphological differences were observed between populations with respect to the setae of the 5th setiger and the presence of the nuchal antenna, both important taxonomic characteristics. Gene frequencies were determined by use of horizontal starch gel electrophoresis. One population varied from all others at a level corresponding to sibling species.

Whitlatch, R.B. , Lohrer, A.M. , Thrush, S.F. , Pridmore, R.D. , Hewitt, J.E. , Cummings, V.J.;Zajac, R. N. (1998).
  Scale-dependent benthic recolonization dynamics: life stage-based dispersal and demographic consequences. Hydrobiologia 375/376: 217-226.
 Relevant content: 'A life stage-based recolonization model, using a Polydora cornuta life table, has been developed to describe how differences in the immigration rates of larvae, juveniles and adults can influence within-patch recovery times.' Ignores any knowledge of biology & seasonality of the animals. The Polydora cornuta is american-based.

Worsaae, K. (2001).
  The Systematic Significance of Palp Morphology in the Polydora Complex (Polychaeta: Spionidae). Zoologischer Anzeiger 240: 45-58.
 Relevant content: Polydora cornuta. Congeneric palp similarities are found in Polydora and Dipolydora. The palp morphology of the two closely related genera Dipolydora and Polydora is significantly different, which supports the validity of the recently resurrected genus Dipolydora.

Zajac, R.N. (1991).
  Population ecology of Polydora ligni, (Polychaeta: Spionidae): II. Seasonal demographic variation and its potential impact on life history evolution. Marine Ecology Progress Series 77: 207-220.
 Relevant content: Polydora cornuta seasonal demographic variation

Zajac, R.N. (1991).
  Population ecology of Polydora ligni, (Polychaeta: Spionidae): I. Seasonal variation in population characteristics and reproductive activity. Marine Ecology Progress Series 77: 197-206.
 Relevant content: Polydora cornuta seasonal variation

Zajac, R.N. (1995).
  Sublethal predation on Polydora cornuta (Polychaeta, Spionidae) - patterns of tissue loss in a field population, predator functional-response and potential demographic impacts. Marine Biology 123: 531-541.
 Relevant content: Field observations in southeastern Connecticut on Polydora cornuta showed that the percentage of adult worms regenerating segments and/or feeding palps varied temporally from May to November 1982, but the general pattern suggests a constant level of sublethal encounters. Over all sampling dates, a mean of 14.9 and 7.0% of the population was found regenerating posterior segments and palps, respectively. The predatory polychaete Eteone heteropoda more often partially consumed worms than lethally predated them.

Some biological information might be found in the Polydora cornuta taxonomic literature.

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