Showing papers in "Netherlands Journal of Sea Research in 1991"

TL;DR: This review summarizes available knowledge on herbivorous and omnivorous zooplankton of the North Sea with a focus on differences between north and south, which are partly due to differences in species composition, community structure and seasonal variation.

TL;DR: Using latitudinal and inshore-offshore gradients in food, predation and abiotic factors, hypotheses for likely controls on different species types according to their range or position within their range are developed.

TL;DR: In this paper, a change from net erosion to net deposition along the Suriname coast between 1947 and 1981 was found to coincide with a shift of the trade winds from a dominantly NE to a more ENE direction from 1959 onward, accompanied by an increase in mean wind velocity.

TL;DR: The body weight of all four bivalve species peaked in May and June at a level approximately twice the lowest value, which occurred in November to March, the extent of this seasonal fluctuation varied, however, from year to year.

TL;DR: In this paper, the ICES NORTH SEA BENTHOS SURVEY showed that the samples from this area can be grouped into four clusters on the basis of macrofaunal similarity.

TL;DR: In this article, the migration and settlement pattern of 0-group summer flounder and southern flounders in an estuarine nursery are described, showing that the two species were found concentrated in different habitats.

TL;DR: Data is presented on the distribution, timing and intensity of spawning of the flatfish species plaice, flounder (Platichthys flesus), dab, dab, long rough dab, sole, solenette, turbot and scaldfish.

TL;DR: Three main chapters compare the process descriptions characteristic of the subsets of models, and discuss aims and results with emphasis on significance and contribution of the processes considered in North Sea ecosystem models.

TL;DR: The distribution of young sole in the bay of Vilaine nursery ground as a function of age and season for the 0, 1 and 2-groups was studied in this article, and the main conclusion is that young soles are concentrated inside a closed nursery area.

TL;DR: Particle size of suspended matter was measured in five Northwest-European estuaries by Coulter counter and pipette analysis, and in situ with a suspension camera, and it was concluded that the particle size measured by Coulter counters and pipettes indicates the fragility (or firmness) of the flocs.

TL;DR: From May 1988 to June 1989 selected areas of the German Wadden Sea, the Ems, Weser, Elbe and Eider estuaries as well as in Elbe tributaries were sampled for 0- and 1-group flounder, demonstrating that smaller fish preferred less saline waters.

TL;DR: The simultaneous increase in growth in the 1960s of age groups of sole and plaice in the southern North Sea, and the absence of such an increase in age groups in the central North Sea suggests that food availability must have increased in the Southern North Sea.

TL;DR: In this article, the results of particle size measurements in several estuaries with a Coulter counter, by pipette analysis and with a Plankton camera that gives the in situ size are discussed.

TL;DR: Two strains of Phaeocystis sp.

TL;DR: Larval growth, date of settlement, and subsequent growth of 0-group plaice were compared in the eastern (Dollard) and western (Texel) parts of the Dutch Wadden Sea in autumn 1988.

TL;DR: In this paper, a conceptual model on relationships between environmental parameters and metamorphosis processes in estuarine areas is proposed based on ontogenic changes occurring during these early life stages.

TL;DR: It is concluded that one of the most important areas of future research is the relationship between reproduction and mortality, and it is suggested that, in general, reproductive effort should increase with age in fish.

TL;DR: The fishery of the Newfoundland-Labrador region is made up of 11 separate management units, all under quota control with a total allowable catch in 1989 equalling 184 500 t for all stocks combined as mentioned in this paper.

TL;DR: The correspondence between growth rates estimated from field data and those observed in the laboratory suggests that growth in the nursery is mainly related to water temperature and not food limited, and that the tidal creeks are an important nursery area.

TL;DR: A notable feature was the differing seasonal occupancy of the Bay by the benthic fish which would act to reduce potential inter-specific competition which suggests that spatial competition could only be intra-specific or against invertebrates.

TL;DR: The response of the oxygen distribution in a sandy sediment to changes in the flow velocity of the overlying water was studied in a cylindrical benthic chamber with a homogeneous friction velocity field at the sediment-water interface, indicating that the diffusion model is not valid.

TL;DR: In this article, the authors used the litterbag technique to investigate the rate of leaf decomposition in a seagrass bed and found that a large part of the particulate carbon present in the surface sediment of seagras beds was derived from above-ground biomass (55% and 37% in Zostera and Cymodocea beds, respectively).

TL;DR: In this paper, a model of cross-shore density-driven circulation shows the possible influence of the strong salinity gradients on the sedimentation of suspended matter on the seafloor.

TL;DR: In this paper, a systematic analysis of all the published data known to us of demersal 0-group flatfish in nursery grounds adjacent to the North Sea and British coastal waters, together with some hitherto unpublished data, is presented.

TL;DR: In this paper, an implicit numerical model was successfully used to simulate water circulation in North Inlet, an estuarine system in South Carolina consisting of extensive Spartina alterniflora salt marshes and numerous interconnected tidal creeks.

TL;DR: In this article, the authors showed that the equilibration of O 2 with the atmosphere was faster than for CO 2 TCO 2 - alkalinity diagrams were only of limited value, since normalization to constant salinity was hampered by freshwater variations of TCO2 combined with the variability of the residence time of the water masses in the coastal area.

TL;DR: The observed patterns of resource partitioning were due to the abundance of prey species which vary spatially and seasonally and are discussed in relation to current work on resource partitions between fishes.

TL;DR: In this paper, the effect of temperature on the ETS activity of organisms living in a consistently low-temperature regime was analyzed at ten stations, nine in Admiralty Bay and one off the coast of King George Island in Bransfield Strait in December 1990 and in January 1991.

TL;DR: In the sediment Cd, Cu, Pb and Zn were more strongly bound under anaerobic conditions than under aerobic conditions and their species changed quickly upon aeration to fractions that were easily extractable (Na-acetate, pH=5; Na-dodecylsulphate, GPA=8).

TL;DR: The results suggest that soles that feed and grow well can increase their absolute fecundity since this is determined by their overall size, however, the proportion of energy allocated to egg production remains much the same as in individuals which have grown less well.