A. alba and Tellina fabula are two species occupying the same feeding niche since both can feed on deposit as well ... [details]

The production of a large number of small-sized eggs suggests that A. alba has a larval development with a long ... [details]

The larvae of A. filiformis are found throughout the summer from July to October. A. filiformis belongs to the ... [details]

Spawning occurs between October and January. Mature females usually have less than 100 ova, which suggests a non- ... [details]

Bathyporeia spp. show two types of movement, swimming and burrowing, that may follow each other up in rapid ... [details]

Bathyporeia spp. show two types of rnovement, swimming and burrowing, that may follow each other up in rapid ... [details]

Callianassa shrimps are burrowing, deposit-feeding crustaceans that live in complex burrow systems. These burrows ... [details]

The time of spawning varies greatly in different areas. Females with ripe eggs have been observed from May until ... [details]

The majority of cumacean species in temperate shallow waters probably lives for a year or less and breeds twice ... [details]

Breeding occurs during the summer months. D. vittatus probably has pelagic larvae. When growth is rapid, it lives ... [details]

Breeding occurs in summer. The pelagic larvae are sometimes found in enormous quantities and likewise the young can ... [details]

E. pusillus has separate sexes and fertilization takes place externally. The breeding season is in the summer ... [details]

Breeding occurs from March to May. The eggs are deposited in a cocoon. In the Delta area the pelagic larvae are ... [details]

E. sanguinea breeds in early summer and has planktonic larvae. In the estuarine Delta area juvenile benthic stages ... [details]

Sexually ripe specimens have been observed in April and May. Most probably the larvae have a planktonic ... [details]

Breeding probably takes place in spring (March-June) and the larvae develop in the water column. The species spawns ... [details]

Polynoids, Harmothoe species included, are considered carnivores, feeding on a variety of small infaunal and ... [details]

H. denticulatus buries itself in soft sediments with great dexterity (Lincoln, 1979; Hayward & Ryland, 1990). [details]

The sexes are separate and breeding occurs in spring and summer. The larvae have a long planktonic life, lasting ... [details]

L. latreilli probably has a non-pelagic development. Because of its jaws L. latreilli is recorded as a predator ... [details]

M. balthica has separate sexes. The main breeding period lies between February and May, with a second spawning in ... [details]

The larvae of [Either M. mirabilis or M. johnstoni]occur in the plankton of the North Sea from April-May to August ... [details]

Breeding occurs during the summer months. The eggs are incubated on the gills of the adults. When released, the ... [details]

The larvae occur in the plankton frorn June-July to September- November, often in large quantities. The planktonic ... [details]

The sexes are separate and individuals breed several times over a number of years in the periods April-May and ... [details]

Breeding occurs in March and August. The species presumably has planktonic larvae.

Analyses of its gut contents ...

The sexes are separate and individuals breed several times over a number of years. Generally, the females breed ... [details]

N. longosetosa breeds from January to early spring and seems to have planktonic larvae. The species is a ... [details]

Pelagic larvae have been found in December, February and April, whereas settling has been observed in ... [details]

Females with ripe eggs have been observed in spring and summer. The planktonic larvae occur in waters with a ... [details]

O. albida has separate sexes, external fertilization and pelagic larvae. The maximum age is estimated at 3 years. ... [details]

Main spawning period is short, viz. from June to July. The larvae remain in the plankton for at least four weeks. ... [details]

The sexes are separate and breeding occurs in the period between spring and summer. The species has pelagic larvae. ... [details]

This amphipod burrows in the superficial layer of the sediment. Generally, breeding behaviour of infaunal amphipods ... [details]

Reproduction takes place in spring and summer. The species has planktonic larvae. P. minuta is considered to be an ... [details]

Reproduction and larval development take place in spring and early summer. The species has a long pelagic stage. ... [details]

The species deposits its eggs in green gelatinous cocoons at the surface of mud flats and probably also on the ... [details]

P. pulchellus is a predator. It attacks its prey, mainly bivalve molluscs, in the sediment, breaking through the ... [details]

Generally, breeding behaviour of infaunal amphipods like P. altamarinus is influenced by location. In deeper waters ... [details]

In spite of its common occurrence there is little information available on its life history or behaviour. S. ... [details]

The larvae of this species have been recorded from March to July, with highest numbers in May-July. Fertilization ... [details]

The sexes are separate. No breeding is observed below water temperatures of 5 °C. Breeding occurs in early spring ... [details]

No information on this species' reproduction is availabie. S. mathildae lives 15 to 20 cm beneath the surface of ... [details]

S. filicornis probably spawns in autumn or winter, releasing large eggs. Planktonic larvae are found from February ... [details]

The planktonic larvae of S. bombyx have been observed in the period April-December, with maximal nurnbers in ... [details]

Because it has been confused with S. subtruncata for a long time, little is known about the reproduction of S. ... [details]

This species probably spawns in winter and early spring. The pelagic larval stage seems to last fairly long. S. ... [details]

The species has separate sexes and breeding occurs from March to September. It has a planktonic veliger larva. ... [details]

Spawning occurs in June-August. T. tenuis most probably has a pelagic larval stage. Longevity is reported to be ... [details]

T. forbesii spawns from November to February. Eggs and larvae are non-pelagic. It is generaily considered to be a ... [details]

U. brevicornis shows two types of movement, swimming and burrowing into the sediment (Watkin, 1939a). U. ... [details]

U. poseidonis shows two types of movement, swimming and burrowing into the sediment (Watkin, 1939a). Little is ... [details]

In the investigated area A. alba is very abundant in the south-eastern part of the Oyster Ground and the Frisian ... [details]

A. filiformis is very abundant in the area of the Oyster Ground, north of the 30 m isobath, with the highest ... [details]

On the Dutch Continental Shelf, A. minuta is most frequent in the sandy sediments of the Southern Bight. lt ... [details]

A. falcatus is frequently found along the Dutch coast from the Voordelta to the Wadden islands and, in lower ... [details]

A. swarnmerdami is found in the shallower part of the Dutch continental shelf. Both A. swarnmerdami and A. falcatus ... [details]

B. elegans is one of the most common macrobenthic species on the Dutch Continental Shelf and the most abundant ... [details]

Iin the studied area B. guilliamsoniana is very abundant in the area of the Southern Bight, north of the Wadden ... [details]

The distribution of O. bradyi in the Dutch part of the North Sea is very patchy. Highest densities are found in the ... [details]

D. vittatus is found exclusively in the southern part of the North Sea, at depths of less than 30 m. It furthermore ... [details]

This cosmopolitan echinoderrn was found in about half of all samples. The species is very abundant north of the ... [details]

It is dominant at the Cleaver Bank and in the south-western part of the Southern Bight. The species is absent from ... [details]

The distribution ofEteone longa ranges from the intertidal zone down to a depth of 30 m. The highest densities are ... [details]

E. sanguinea has a patchy distribution in the sandy sediments of the Dutch Continental Shelf. lt is furthermore ... [details]

N. longissima occurs from the subtidal zone of the Wadden Sea and the Delta area down to a depth of 50 m in the ... [details]

This species is very abundant at the Oyster Ground, where it forms a substantial part of the infaunal biomass. G. ... [details]

H. denticulatus is found throughout the area at depths of over 20 m. This amphipod is most abundant at the Cleaver ... [details]

L. conchilega is widely distributed in the area, i.e. from the tidal estuaries to the Dogger Bank in the north. ... [details]

L. latreilli is very numerous in the Frisian Front area. The species also occurs in the south-western part of the ... [details]

M. balthica occurs from the upper part of the intertidal down to the shallow subtidal zone. In the study area it is ... [details]

[Either M. mirabilis or M. johnstoni, long wrongly represented as]M. papillicornis occurs in almost the entire ... [details]

M. ferruginosa occurs in the North Sea proper and in the Oosterschelde. The species is particularly abundant along ... [details]

M. bidentata is very abundant at the Oyster Ground, where high densities of A. filiformis (q.v.) occur, but is also ... [details]

N. caeca occurs in small numbers in a broad region parallel to the coast. lt is even more scarce in the offshore ... [details]

N. cirrosa is a dominant species in the Southern Bight with high densities at the Brown Bank and near the coast. lt ... [details]

The species is common near the coast, in the Wadden Sea and almost the entire Delta area, with high densities in ... [details]

The species occurs in the subtidal zone of the western Wadden Sea, in the shallow waters along the coast and in the ... [details]

This species is quite common at the Oyster Ground. N. latericeus also occurs at a few locations in the ... [details]

O. limacina is found in the Southern Bight, its distribution extending into the marine and central part of the ... [details]

O. fusiformis mainly occurs north of the 30 m isobath up to the Dogger Bank, with the highest densities in the ... [details]

The species shows clear patches with high densities in the South-eastern part of the Oyster Ground, north of the ... [details]

P. longimanus is widespread and is frequently recorded from the subtidal in the Delta area down to depths of about ... [details]

The distribution of P. minuta in the area comprises the brackish waters of the Delta area and the Wadden Sea, the ... [details]

Highest densities are found north of the Wadden islands. lt is found in lower numbers on the Brown Bank, at the ... [details]

A. mucosa occurs near the Dutch coast, from the Voordelta in the south to the Dutch Wadden islands in the north, ... [details]

P. pulchellus occurs in the whole area, but is relatively abundant along the coast and south of the Frisian Front, ... [details]

P. altamarinus can be observed most frequently in the area south of the 30 m isobath and is locally very common ... [details]

A widespread species occurring in the subtidal zone of the western Wadden Sea, the Southern Bight, part of the ... [details]

S. squamata is mainly found in the off shore part of the Southern Bight and north of the Wadden islands, and ... [details]

S. armiger occurs in almost the entire area, except for the central part of the Oyster Ground. The polychaete is ... [details]

S. mathildae is most abundant at the Dogger Bank and in a broad zone south of the Frisian Front. The species is ... [details]

S. bombyx is found at almost 50% of all stations sampled. Locally, i.e. to the west and north of the Wadden islands ... [details]

S. elliptica has only been found at some locations south of 54'N in the Southern Bight and shows a marked ... [details]

T. tenuis does not occur in the offshore parts of the North Sea, but is restricted to a narrow zone along the ... [details]

The distribution of T. forbesii comprises the subtidal zone in the western Wadden Sea, the Southern Bight and sorne ... [details]

U. brevicornis is a common inhabitant of the offshore part of the Southern Bight and is found in high densities at ... [details]

In the studied area U. poseidonis is much more common than U. brevicornis. The species is very abundant in the ... [details]

A. minuta lives in fine and muddy sands mixed with shell fragrnents (Hartmann-Schröder, 1971; Wolff, 1973). [details]

In the study area, this species occurs in fine to mediurn sand with a low mud content. In literature A. falcatus is ... [details]