Blar i Havforskningsinstituttet på emneord "zooplankton"
Viser treff 21-40 av 92
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Environmental toxicology: Population modeling of cod larvae shows high sensitivity to loss of zooplankton prey
(Journal article; Peer reviewed, 2010-12-30)Two factors determine whether pollution is likely to affect a population indirectly through loss of prey: firstly, the sensitivity of the prey to the pollutants, and secondly, the sensitivity of the predator population to ... -
Evidence for effects on the North Sea ecosystem due to varying oceanic inflow over the last 100 years
(ICES CM Documents;2002/Q:8, Working paper, 2002)Oceanic inflow is estimated to contribute more than 90% of the nutrient input into the North Sea (NSTF, 1993). Variability in the volume, chemical properties, biological content and source of the inflowing water is thus ... -
Experiences in making acoustic measurements in a mesocosm with Calanus finmarchius
(ICES CM Documents;1997/FF:11, Working paper, 1997)In connection with a larger study of the effects of nutrification and turbulence on primary and secondary production, acoustic measurements have been made in the water volume defined by floating, vertically oriented, ... -
Feeding ecology of Atlantic mackerel (Scomber scombrus) in the Norwegian Sea
(ICES CM documents, Working paper, 2006)Previous studies on Atlantic mackerel (Scomber scombrus) feeding during the highly migratory summer period are scarce. In this study we present detailed diet analyses and investigations of prey selection for Atlantic ... -
Gelatinous zooplankton on the Mid-Atlantic Ridge, Distribution patterns of trawl-collected planktonic cnidarians
(ICES CM documents;2008/C:21, Working paper, 2008)The Mid-Atlantic Ridge (MAR) between 40˚N (Azores) and 63˚N (Iceland) is the largest topographic feature in the North Atlantic Ocean. However, the fauna and ecological significance of mid-ocean ridges has remained poorly ... -
Geografisk og sesongmessig fordeling av plante- og dyreplankton i det nordlige Barentshavet. Sluttrapport.
(Fisken og havet, Research report, 1995)The present report summarizes our knowledge on the distribution of phyto- and zooplankton in the northern Barents Sea. More than 50% of the biomass of phytoplankton is produced during the spring bloom period and takes ... -
Growth of Barents Sea capelin (Mallotus villosus) in relation to zooplankton abundance
(Journal article; Peer reviewed, 2002)Because capelin feed on zooplankton, the availability of the latter may be a limiting factor for capelin growth in at least some areas and at certain times. It was therefore hypothesized that a relationship exists between ... -
Growth of Barents Sea capelin (Mallotus villosus) in relation to zooplankton abundance
(Journal article; Peer reviewed, 2002)Because capelin feed on zooplankton, the availability of the latter may be a limiting factor for capelin growth in at least some areas and at certain times. It was therefore hypothesized that a relationship exists between ... -
Growth of capelin in relation to zooplankton biomass in the Barents Sea
(ICES CM Documents;1995/P:5, Working paper, 1995)Growth of capelin in the Barents Sea stock has been found to vary considerably both between years and between different parts of the distribution area. The aim of this paper is to compare such growth variations with ... -
Habitat choice by marine zooplankton in a high-latitude ecosystem
(Journal article; Peer reviewed, 2008-07-29)According to habitat choice theory, zooplanktonic prey should choose a depth habitat that maximizes food intake while minimizing predation risk. Body size affects competitive ability and vulnerability in zooplankton, ... -
Impact of grazin from capelin (Mallotus villosus) on zooplankton: a case study in the northern Barents Sea in August 1985
(ICES CM Documents;1991/L:62, Working paper, 1991)The distribution of capelin was mapped in the area east of Hopen. Zooplankton was sampled with Juday net and 1m^2 MOCNESS sampler, and analyzed with respect to hydrography and capelin abundance. The capelin "front" ... -
Impact of ultraviolet radiation on marine crustacean zooplankton and ichthyoplankton: a synthesis of results from the estuary and Gulf of St. Lawrence, Canada
(Journal article; Peer reviewed, 2000-06-26)The objectives of the research program reported upon here were (1) to measure ambient levels of UV radiation and determine whichvariables most strongly affected its attenuation in the waters of the estuary and Gulf of St. ... -
Initial collateral measurements of some properties of Calanus finmarchicus
(ICES CM Documents;1996/L:21, Working paper, 1996)In general, acoustic quantification of zooplankton such as Calanus finmarchicus requires the use of models, among other reasons, to aid in the interpretations of data collected on animals whose scattering properties change ... -
Joint Norwegian-Russian environmental status report on the Barents Sea Ecosystem. Update for current situation for climate, phytoplankton, zooplankton, fish and fisheries in 2011.
(IMR/PINRO Joint Report Series;3/2013, Research report, 2013) -
KunnskapsInnhenting Barentshavet–Lofoten–Vesterålen (KILO)
(Fisken og Havet;3-2013, Research report, 2013-03)I revidert nasjonalbudsjett 2011 fikk Havforskningsinstituttet i oppdrag å styrke kunnskapsgrunnlaget om marine økosystemer og ressurser i området Lofoten-Vesterålen. Prosjektet ble gjennomført i perioden fra november 2011 ... -
Light Primes the Escape Response of the Calanoid Copepod, Calanus finmarchicus
(Journal article; Peer reviewed, 2012-06-27)The timing and magnitude of an escape reaction is often the determining factor governing a copepod’s success at avoiding predation. Copepods initiate rapid and directed escapes in response to fluid signals created by ... -
Mangel på egnet råstoff til fiskefôr – kan plankton brukes?
(Havforskningsnytt, Working paper, 2004) -
Modeling the target strength of Meganyctiphanes norvegica
(Others, 1999) -
Multibrukssystem for tauete farkoster og droppsonde - forprosjekt: evaluering av operasjoner, teknologi og systemer med utgangspunkt i måle- og observasjonsbehov
(Fisken og havet, Research report, 2001)I hovedprosjektet skal det utvikles et integrert system av to tauete farkoster og en droppsonde med sine målesystemer, sensorer og kommunikasjonsgrensesnitt for dataoverføring som i stor grad bruker felles teknologi for ...