On the distribution and population dynamics of the ctenophore Mnemiopsis leidyi in the Belgian part of the North Sea and Westerschelde estuary

2015 ◽  
Vol 110 ◽  
pp. 33-44 ◽  
Author(s):  
Lies Vansteenbrugge ◽  
Bart Ampe ◽  
Marleen De Troch ◽  
Magda Vincx ◽  
Kris Hostens
Keyword(s):  
Population Dynamics ◽  
North Sea ◽  
Mnemiopsis Leidyi ◽  
The North ◽  
Westerschelde Estuary ◽  
The North Sea

scholarly journals Population genomic structure of the gelatinous zooplankton species Mnemiopsis leidyi in its nonindigenous range in the North Sea

2019 ◽  
Vol 10 (1) ◽  
pp. 11-25
Author(s):  
Christophe Verwimp ◽  
Lies Vansteenbrugge ◽  
Sofie Derycke ◽  
Thomas Kerkhove ◽  
Hilde Muylle ◽  
...  
Keyword(s):  
North Sea ◽  
Genomic Structure ◽  
Gelatinous Zooplankton ◽  
Mnemiopsis Leidyi ◽  
Zooplankton Species ◽  
The North ◽  
Population Genomic ◽  
The North Sea

scholarly journals Modelling survival and connectivity of <i>Mnemiopsis leidyi</i> in the southern North Sea and Scheldt estuaries

2014 ◽  
Vol 11 (3) ◽  
pp. 1561-1611 ◽  
Author(s):  
J. van der Molen ◽  
J. van Beek ◽  
S. Augustine ◽  
L. Vansteenbrugge ◽  
L. van Walraven ◽  
...  
Keyword(s):  
North Sea ◽  
Particle Tracking ◽  
Climatic Conditions ◽  
Mnemiopsis Leidyi ◽  
Biogeochemical Model ◽  
Southern North Sea ◽  
The North ◽  
Particle Tracking Model ◽  
The North Sea ◽  
Tracking Model

Abstract. Three different models were applied to study the reproduction, survival and dispersal of Mnemiopsis leidyi in the Scheldt estuaries and the southern North Sea: a high-resolution particle tracking model with passive particles, a low resolution particle tracking model with a reproduction model coupled to a biogeochemical model, and a dynamic energy budget (DEB) model. The results of the models, each with its strengths and weaknesses, suggest the following conceptual situation: (i) the estuaries possess enough retention capability to keep an overwintering population, and enough exchange with coastal waters of the North Sea to seed offshore populations; (ii) M. leidyi can survive in the North Sea, and be transported over considerable distances, thus facilitating connectivity between coastal embayments; (iii) under current climatic conditions, M. leidyi may not be able to reproduce in large numbers in coastal and offshore waters of the North Sea, but this may change with global warming – however this result is subject to substantial uncertainty. Further quantitative observational work is needed on the effects of temperature, salinity and food availability on reproduction and on mortality at different life stages to improve models such as used here.

scholarly journals The invasive ctenophore Mnemiopsis leidyi: a threat to fish recruitment in the North Sea?

2010 ◽  
Vol 33 (1) ◽  
pp. 137-144 ◽  
Author(s):  
H. H. Hamer ◽  
A. M. Malzahn ◽  
M. Boersma
Keyword(s):  
North Sea ◽  
Mnemiopsis Leidyi ◽  
The North ◽  
Fish Recruitment ◽  
The North Sea

scholarly journals Modelling risk areas in the North Sea for blooms of the invasive comb jelly Mnemiopsis leidyi A. Agassiz, 1865

2014 ◽  
Vol 9 (1) ◽  
pp. 21-36 ◽  
Author(s):  
Kate Collingridge ◽  
Johan van der Molen ◽  
Sophie Pitois
Keyword(s):  
North Sea ◽  
Mnemiopsis Leidyi ◽  
The North ◽  
Comb Jelly ◽  
The North Sea ◽  
Risk Areas

scholarly journals Spatial and temporal shift in the factors affecting the population dynamics of Calanus copepods in the North Sea

2020 ◽  
Vol 27 (3) ◽  
pp. 576-586
Author(s):  
José T. Montero ◽  
Mauricio Lima ◽  
Sergio A. Estay ◽  
Enrico L. Rezende
Keyword(s):  
Population Dynamics ◽  
North Sea ◽  
Temporal Shift ◽  
Factors Affecting ◽  
The North ◽  
The North Sea

scholarly journals Integrating stochastic age-structured population dynamics into complex fisheries economic models for management evaluations: the North Sea saithe fishery as a case study

2014 ◽  
Vol 71 (7) ◽  
pp. 1638-1652 ◽  
Author(s):  
Sarah Laura Simons ◽  
Heleen Bartelings ◽  
Katell Gaelle Hamon ◽  
Alexander Johannes Kempf ◽  
Ralf Döring ◽  
...  
Keyword(s):  
Population Dynamics ◽  
North Sea ◽  
The North ◽  
Control Rules ◽  
Structured Population ◽  
Structured Population Dynamics ◽  
The North Sea ◽  
Age Structured ◽  
Age Structured Population ◽  
Harvest Control Rules

There is growing interest in bioeconomic models as tools for understanding pathways of fishery behaviour in order to assess the impact of alternative policies on natural resources. A model system is presented that combines stochastic age-structured population dynamics with complex fisheries economics. Explicitly, the economic response of fleet segments to changes in stock development is analysed by applying observed values and stochastic recruitment. The optimization of net profits determines the fishing effort and the investment and disinvestment behaviour of fleet segments, which, in turn, affect the level of catch rates and discards. This tool was applied to the North Sea saithe fishery, where ICES re-evaluated the existing EU–Norway management plan, focusing on biological reference points only. Two scenarios were tested with alternative harvest control rules and then contrasted with one unregulated scenario with no quotas and driven by optimizing the net profit of the whole fleet. The model showed the success of both harvest control rules in rebuilding the stock and the associated costs to the fleets in terms of maximal 21% reduction in net profits, 21% reduction in crew wages and 11% reduction in fleet size in the midterm (2007–2015). In the long term (2022), successful stock recovery coincided with net profits almost equalling that of the unrestricted fishery. The model is highly sensitive to the parameter values but can be used strategically, providing a qualitative understanding of the anticipated relative changes.

scholarly journals The proportion of flatfish recruitment in the North Sea potentially affected by offshore windfarms

2019 ◽  
Vol 77 (3) ◽  
pp. 1227-1237 ◽  
Author(s):  
Léo Barbut ◽  
Berthe Vastenhoud ◽  
Laurence Vigin ◽  
Steven Degraer ◽  
Filip A M Volckaert ◽  
...  
Keyword(s):  
Population Dynamics ◽  
North Sea ◽  
Wind Farms ◽  
Offshore Wind ◽  
Spawning Grounds ◽  
Spatial Overlap ◽  
Flatfish Species ◽  
The North ◽  
The North Sea ◽  
Tracking Model

Abstract Understanding the influence of man-made infrastructures on fish population dynamics is an important issue for fisheries management. This is particularly the case because of the steady proliferation of offshore wind farms (OWFs). Several flatfish species are likely to be affected because areas with OWFs in place or planned for show a spatial overlap with their spawning grounds. This study focuses on six commercially important flatfish species in the North Sea: common sole (Solea solea), European plaice (Pleuronectes platessa), turbot (Scophthalmus maximus), brill (Scophtalmus rhombus), European flounder (Platichthys flesus), and common dab (Limanda limanda). We used a particle-tracking model (Larvae&Co) coupled to a 3D hydrodynamic model to assess the effects of spatial overlap of OWFs with the species’ spawning grounds on the larval fluxes to known nursery grounds. An important overlap between planned areas of OWFs and flatfish spawning grounds was detected, with a resulting proportion of settlers originating from those areas varying from 2% to 16%. Our study suggests that European plaice, common dab, and brill could be the most affected flatfish species, yet with some important local disparities across the North Sea. Consequently, the study represents a first step to quantify the potential impact of OWFs on flatfish settlement, and hence on their population dynamics.

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