M.J.N. Bergman
Utrecht University
OceanographyEcologyFisheryBenthic zoneBiology
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Publications 46
Two alternative stimulation techniques to reduce mortality in benthic megafauna were tested relative to standard tickler chain beam trawling: longitudinal electrodes (pulse trawl) and longitudinal chains. Longitudinal chains caused higher mortality than pulse trawling in 3 species. Standard trawling gave higher mortality in Echinocardium cordatum than pulse trawling. Between longitudinal chain and standard trawling were no significant differences. This trend in decreasing mortality from longitud...
1 CitationsSource
#1Justin C Tiano (UGent: Ghent University)H-Index: 1
#2Rob Witbaard (UU: Utrecht University)H-Index: 17
Last. Karline Soetaert (UGent: Ghent University)H-Index: 53
view all 7 authors...
Research on the environmental impacts of bottom fishing gears has focused mainly on structural characteristics of benthic habitats such as faunal composition and the physical features of the seafloor. This study focuses more on functional characteristics by addressing the biogeochemical consequences associated with tickler chain beam trawl and electric PulseWing trawl gears. In June 2017, professional fishermen trawled experimental transects with both types of gears in the Frisian Front area of ...
1 CitationsSource
#1Thomas D. Linley (Aberd.: University of Aberdeen)H-Index: 9
#2Marc S. S. LavaleyeH-Index: 22
Last. Imants G. Priede (Aberd.: University of Aberdeen)H-Index: 46
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Autonomous photographic landers are a low-impact survey method for the assessment of mobile fauna in situations where methods such as trawling are not feasible or ethical. Three institutions collaborated through the CoralFISH project, each using differing lander systems, to assess the effects of cold‐water corals on fish diversity and density. The Biogenic Reef Ichthyofauna Lander (BRIL, Oceanlab), Autonomous Lander for Biological Experiments (ALBEX, NIOZ) and the Marine Environment MOnitoring s...
14 CitationsSource
A long-term lander employing a baited camera system was developed to study temporal variation in the presence of scavenging fish and invertebrates at a cold-water coral community on Galway Mound (Belgica Mound Province, NE Atlantic). The camera system was tested during two successful long-term deployments for periods of 6 and 12 months respectively. The baited system, consisting of two separate video cameras with infrared lights and a bait dispenser with 24 bait positions, recorded more than 15,...
5 CitationsSource
#1Rob Witbaard (UU: Utrecht University)H-Index: 17
#2M.J.N. Bergman (UU: Utrecht University)H-Index: 16
Last. Gerard C.A. Duineveld (UU: Utrecht University)H-Index: 9
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Abstract This paper describes the distribution of the razor clam Ensis directus in the Dutch coastal zone with emphasis on its relation to sediment grainsize, in particular silt. The study includes a spatial survey along the coast of North Holland (Netherlands) and an in-situ experiment for the burial of silt. Densities of E. directus appeared highest close to the coast in the siltiest sediment, where also the highest body mass index values (BMI) were found suggesting the best conditions for gro...
2 CitationsSource
#1C.M. van der Hout (UU: Utrecht University)H-Index: 1
#2Rob Witbaard (UU: Utrecht University)H-Index: 17
Last. Theo Gerkema (UU: Utrecht University)H-Index: 17
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The analysis of 1.8 years of data gives an understanding of the response to varying forcing of suspended particulate matter (SPM) and chlorophyll-a (CHL-a) in a coastal turbidity maximum zone (TMZ). Both temporal and vertical concentration variations in the near-bed layer (0–2 m) in the shallow (11 m deep) coastal zone at 1 km off the Dutch coast are shown. Temporal variations in the concentration of both parameters are found on tidal and seasonal scales, and a marked response to episodic events...
7 CitationsSource
#1M.J.N. BergmanH-Index: 16
#2Selma M. UbelsH-Index: 1
Last. Erik W. G. Meesters (WUR: Wageningen University and Research Centre)H-Index: 1
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As part of a large impact study in a wind farm (OWEZ) in the Dutch coastal zone, the effects of exclusion of bottom trawling on the benthic community were studied by comparison with nearby reference areas which were regularly fished. In addition to a standard boxcorer for common macrofauna, a Triple-D dredge was used to collect longer-lived, more sparsely distributed infauna and epifauna. Multivariate analysis did not reveal any difference between the assemblages in and outside OWEZ with respect...
10 CitationsSource
Here we present data on the wax and wane of a subtidal Ensis directus population which settled in 2009 off the coast of Egmond (North Holland Coast in The Netherlands). Initial densities decreased from a maximum of 700 m- 2 in early 2010 to about 50 m- 2 in June 2013. In this period the average length increased from ~ 4 cm to ~ 12 cm. In 2011–2012 the population was sampled at 3 to 6 week intervals and near bottom environmental conditions were monitored continuously. Samples of animals that were...
8 CitationsSource
Abstract Cold-water corals (CWC) can form complex three-dimensional structures that can support a diverse macro- and megafaunal community. These reef structures provide important biogenic habitats that can act as refuge, feeding, spawning and nursery areas for fish. However, quantitative data assessing the linkage between CWC and fish are scarce. The North Atlantic Ocean is a key region in the worldwide distribution of Lophelia pertusa , which is thought to be the most widespread frame-work form...
29 CitationsSource
#1Furu Mienis (University of Bremen)H-Index: 17
Last. Tjeerd C. E. van WeeringH-Index: 42
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The Cape Lookout cold-water coral area off the coast of North Carolina forms the shallowest and northernmost cold-water coral mound area on the Blake Plateau in the NW Atlantic. Cold-water coral habitats near Cape Lookout are occasionally bathed in the Gulf Stream, which is characterised by oligotrophic warm water and strong surface currents. Here, we present the first insights into the mound distribution and morphology, sedimentary environment and coral cover and near-bed environmental conditio...
19 CitationsSource