The ecology and reproductive cycle of a population of <i>Marenzelleria viridis</i> (Annelida: Polychaeta: Spionidae) in the Tay Estuary

Atkins, Shanan; Jones, A.; Garwood, P. R.

doi:10.1017/s0269727000004735

Cited by 26 publications

(21 citation statements)

References 4 publications

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“…8). This finding is in agreement with observations in the Tay estuary by ATKINS et aL (1987). The first appearance of juveniles in the Dollard in the samples in May are also in accordance with data obtained in the Tay estuary, and in North America (GEORGE, 1966).…”

Section: Reproduction Cyclesupporting

confidence: 93%

“…Because specimens of M. viridis easily fragment during sieving the size of the worms was measured under a dissecting microscope as the body width of approx, the 10th segment (cf. ATKINS et aL, 1987). Before measuring, the animals were anaesthetized with 7.5% MgCI 2 in sea water.…”

Section: Methodsmentioning

confidence: 99%

“…When treatment of live animals was not possible animals were preserved in neutralized 6% formaldehyde. The reproductive state was assessed by checking for the presence of oocytes (orange-brown) or spermatocytes (white) in the coelome of adult animals (ATKINS et aL, 1987;GEORGE, 1966).…”

Section: Methodsmentioning

confidence: 99%

“…Since then, this polychaete has spread to several estuaries around the North Sea: Tay estuary (1984) (ATKINS et aL, 1987), Humber (1987) (R. Barr, pers. comm.…”

Section: Introductionmentioning

confidence: 99%

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Distribution and life cycle of the North American Spionid polychaeteMarenzelleria viridis (Verrill, 1873) in the Ems estuary

Essink

Kleef

1993

Netherlands Journal of Aquatic Ecology

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In 1983 the first specimens of the North American spionid polychaete Marenzelleria viridis were found along the European mainland shore in the Ems estuary. Since then, this polychaete has spread over several estuaries around the North Sea and the Baltic. In the inner part of the Ems estuary juveniles were predominantly present in muddy sediments high in the intertidal zone; in more sandy sediments at higher salinities juveniles and adults co-occured. Detailed information was obtained at a muddy and at a sandy station.Gametes were present in the coelomic fluid from November through March. In May new recruits were found in the sediment samples, reaching densities of over 105 m -2 at the muddy station, and c. 2000 m -2 at the sandy station. During summer, densities decreased at the muddy station, coinciding with a density increase at the sandy station, suggesting migration of juveniles from a nursery to the adult habitat. Cage experiments showed that the decrease of juveniles at the muddy station could be attributed to migration and not to mortality due to predation.At the sandy habitat palps and anterior parts of M. viridis made up 4-11% of the stomach content of juvenile plaice (Pleuronectes platessa). In juvenile flounder (Platichthys flesus) only in April c. 10% of the stomach content consisted of M. viridis. During 1983During -1990 increasing densities of M. viridis at the sandy habitat coincided with a reduced abundance of Nereis diversicolor, however, this inverse relationship was not found to be statistically significant. Density fluctuations of M. viridis and Corophiurn volutator showed a significant positive relationship, the cause of which is not yet understood.

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Section: Reproduction Cyclesupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Since then, this polychaete has spread to several estuaries around the North Sea: Tay estuary (1984) (ATKINS et aL, 1987), Humber (1987) (R. Barr, pers. comm.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distribution and life cycle of the North American Spionid polychaeteMarenzelleria viridis (Verrill, 1873) in the Ems estuary

Essink

Kleef

1993

Netherlands Journal of Aquatic Ecology

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“…The occurrence in 1982 of the spionid polychaete, later identified as Marenzelleria viridis being an immigrant from northern America, represents the first record of this species in western Europe (cf. ATKINS et al, 1987;ESSINK AND KLEEF, 1988, 1993.…”

Section: Discussionmentioning

confidence: 99%

Variations in the intertidal and subtidal macrofauna and sediments along a salinity gradient in the upper forth estuary

McLusky

Hull

Elliott

1993

Netherlands Journal of Aquatic Ecology

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The intertidal and subtidal soft-sediment macrofauna of the upper Forth estuary, eastern Scotland, UK has been examined. The intertidal fauna was sampled in 1977, and again in 1988/89, at up to twelve stations along the salinity gradient. The subtidal fauna was sampled in 1982 and in 1988/89 at up to 15 stations. The stations span the region of the freshwater-seawater interface, and area of the turbidity maximum. Large spatial and temporal variations in macrofaunal abundance and species composition were observed. Sites at the head of the estuary with low salinity were dominated by oligochaetes, but more saline areas were characterised by a depauparate estuarine fauna. The area has historically received large quantities of organic waste both from sewage and industrial discharges which supported very high abundances of oligochaetes of up to 500,000 m-2 in the upper reaches of the estuary. Reductions in the organic inflow to the area since the early-1980's have begun to cause reductions in oligochaete populations and also allowed the further penetration intertidally of non-oligochaete species into the upper and middle reaches of the estuary. No comparable upstream penetration by the non-oligochaete subtidal fauna has been observed, possibly on account of the greater sediment instability in the estuary's main channel.

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Non-native marine species in British waters: effects and controls

Eno

1996

Aquatic Conserv: Mar. Freshw. Ecosyst.

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1. The occurrence of non‐native marine macro fauna and flora, which have become established in the wild British waters, are summarized. The effects of these non‐natives on the native fauna and flora and on commercial and recreational interests are reviewed. 2. Sixteen species of marine algae (11 rhodophytes, three chromophytes and two chlorophytes), five diatoms, one angiosperm and 31 invertebrates were identified as non‐native. The majority of these species are red algae, polychaete worms, crustaceans and molluscs. 3. Species were introduced directly from primary sources within their natural range, or from secondary sources to which they had previously been introduced. They have only become established where introduced from similar latitudes of both hemispheres. 4. More than half the total number of species are considered to have been introduced to Britain in association with shipping, whilst half of the non‐native marine algae are believed to have been introduced in association with deliberate introductions for mariculture. 5. Of the species that had spread, the marine plants did so fairly rapidly, while the invertebrates tended to spread more slowly. The methods of spread were often the same as their method of introduction for both flora and fauna. 6. The direct effects of non‐native species on the marine environment in British waters are not as detrimental as those reported from elsewhere in the world. Some commercially important species have been introduced, but some associated pests and parasites have accompanied them. 7. Control methods, where applied to populations of nuisance species, are fairly ineffective and no non‐native marine species have been deliberately eradicated from British waters. Ways of avoiding introduction of further non‐natives by mandatory and voluntary means are discussed. ©1996 by John Wiley & Sons, Ltd.

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The ecology and reproductive cycle of a population of Marenzelleria viridis (Annelida: Polychaeta: Spionidae) in the Tay Estuary

Cited by 26 publications

References 4 publications

Distribution and life cycle of the North American Spionid polychaeteMarenzelleria viridis (Verrill, 1873) in the Ems estuary

Distribution and life cycle of the North American Spionid polychaeteMarenzelleria viridis (Verrill, 1873) in the Ems estuary

Variations in the intertidal and subtidal macrofauna and sediments along a salinity gradient in the upper forth estuary

Non-native marine species in British waters: effects and controls

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