+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Reproductive energetics endocrinology and population dynamics of nephtys caeca and nephtys hombergi

Reproductive energetics endocrinology and population dynamics of nephtys caeca and nephtys hombergi

Marine Biology (Berlin) 88(3): 235-246

An investigation of gametogenetic cycles and spawning success in populations of Nephtys caeca and N. hombergi from the River Tyne estuary, North Shields, England [UK], in relation to production of gonadotrophic (GH) and spawning hormones (SH) has been made, based on data collected from 1978-1984. The data show that a consistent pattern of gametogenesis and efficient spawning occurs in populations of N. caeca in north-east England, but that the reproductive cycle of N. hombergi is erratic. Premature oosorption and gametogenic failure in this latter species is associated with a low level of GH production. Following high levels of GH production, gravid females sometimes fail to spawn owing to the non-release of SH. The reproductive energetics and reproductive success of N. caeca and N. hombergi are described in relation to the observed patterns of endocrine activity and the consequent changes in population structure.

(PDF emailed within 1 workday: $29.90)

Accession: 006316883

Download citation: RISBibTeXText

Related references

Reproductive energetics, endocrinology and population dynamics of Nephtys caeca and N. hombergi. Marine Biology (Berlin): 883: 235-246, 1985

The spawning and spawning mechanism of Nephtys caeca (Fabricius, 1780) and Nephtys hombergi Savigny, 1818 (Annelida: Polychaeta). Sarsia, 691: 63-68, 1984

The life-history and population structure of the polychaetes Nephtys caeca and Nephtys hombergii with special reference to the growth rings in the teeth. Journal of the Marine Biological Association of the United Kingdom, 571: 133-150, 1977

Distribution growth and production of nephtys hombergi and nephtys assimilis polychaeta nephtyidae in benthic communities of the north sea. Bulletin of Marine Science 48(2): 330-345, 1991

The behaviour of Nephtys caeca inside sediment under experimental conditions Occupation des sediments par le polychete Nephtys caeca en conditions controlees. Comptes Rendus de l'Academie des Sciences Serie III Sciences de la Vie. Mai; 3195: 417-423, 1996

Reproduction and annual gametogenic cycle in nephtys hombergii and nephtys caeca polychaeta nephtyidae. Marine Biology (Berlin) 46(1): 83-90, 1978

The significance of the long chaetal form of nephtys caeca polychaeta nephtyidae and its relationship to nephtys longosetosa. Sarsia 66(3): 195-202, 1981

Ultrastructual study and description of Paramyxoides nephtys gen. n., sp. n. a parasite of Nephtys caeca (Fabricius, 1780) (Polychaeta: Nephtyidae). Acta Protozoologica. May; 442: 175-187, 2005

The genus nephtys polychaeta phyllodocida in northern europe redescription of nephtys hystricis and nephtys incisa. Journal of Natural History 24(2): 361-372, 1990

The distribution of Nephtys californiensis, Nephtys polybranchia and Nephtys oligobranchia along the northern coasts of China. Acta Zoologica Sinica, 263: 250-254, 1980

Distribution of nephtys californiensis nephtys polybranchia and nephtys oligobranchia along the northern coasts of china. Acta Zoologica Sinica 26(3): 250-254, 1980

Population dynamics of the polychaete Nephtys caeca in an intertidal estuarine environment (Quebec, Canada). Journal of the Marine Biological Association of the United Kingdom. November; 754: 871-884, 1995

Dynamics and reproduction of nephtys hombergi annelida polychaeta in the bassin d'arcachon france. Cahiers de Biologie Marine 30(4): 473-486, 1989

Movement of the polychaete worm 'Nephtys hombergi'. Starfish, 28: 28, 1976