A5049924904- Marine and fisheries research
- Food Industry and Aquatic Biology
- Marine and coastal ecosystems
- Isotope Analysis in Ecology
- Marine and environmental studies
- Fish Ecology and Management Studies
- Marine Bivalve and Aquaculture Studies
- Arctic and Antarctic ice dynamics
- Cephalopods and Marine Biology
- Oceanographic and Atmospheric Processes
- Ocean Acidification Effects and Responses
- Marine Biology and Ecology Research
- Marine Invertebrate Physiology and Ecology
Knipovich Polar Research Institute of Marine Fisheries and Oceanography
2013-2025
All-Russian Research Institute Fisheries and Oceanography
2019-2023
Temporal and spatial dynamics of phytoplankton zooplankton in the Barents Sea have been investigated during last three decades using remote sensing situ observations. Satellite-derived sea surface temperatures increased period 1998–2017 by 1.0 °C as an average for Sea. We found significant positive relationships between ice-free conditions (open water area duration) satellite-based net primary production (NPP). The estimated annual NPP more than doubled over period, from around 40 to 100 Tg...
Arctic cod (Boreogadus saida) is the most abundant forage fish in Ocean. Here we review habitats, distribution, ecology, and physiology to assess how climate change other anthropogenic stressors are affecting this key species. This identifies vulnerabilities for different life stages across entire distribution range of cod. We explore impact environmental (abiotic biotic) on with a regional perspective scenario up year 2050 identify knowledge gaps constraining predictions. Epipelagic eggs...
Abstract Diets of Norwegian spring-spawning herring, mackerel, and blue whiting in the Sea are investigated relation to distribution plankton hydrographic conditions. Fish stomachs zooplankton samples were collected during summer (June July) cruises 2001 2002. Calanus finmarchicus was principal prey accounting for 53–98% total stomach content by weight. The diet composition herring varied depending on feeding area availability food under various environmental C. important only July (about...
There is a long history of investigations fish diet in the Barents Sea. The focus has been on commercially important species and their food consumption, while interactions other fishes have studied only sporadically. In 2015, large-scale stomach sampling program was carried out for caught routine monitoring surveys Sea during different seasons year, supplemented with samples collected from Russian commercial fisheries. A total 27,657 stomachs 70 (including two genera) were analysed,...
A key process affecting variation in the recruitment of fish into fisheries is spatio-temporal overlap between prey and predator (match-mismatch hypothesis, MMH). The Northeast Arctic cod Gadus morhua its dominant prey, copepod Calanus finmarchicus , have long been studied Norwegian-Barents Sea system. However, mechanistic explanation how survival affected by MMH dynamics remains unclear. Most studies focused on either time synchrony or spatial trophic levels. Here, we used G. larvae C. data...
Capelin (Mallotus villosus) and polar cod (Boreogadus saida) hold a fundamental position in the Barents Sea ecosystem as consumers of zooplankton while serving forage fish for commercial ecological key species Atlantic (Gadus morhua). The ongoing warming Atlantification Sea, along with increasing net primary production, makes previously inaccessible northern areas available feeding grounds capelin. opposite effect is anticipated ice-dependent cod. transport water boreal plankton from...
Abstract The Arctic warms nearly four times faster than the global average, with maximum warming in Barents Sea. Concurrently, changes species distribution this productive and highly exploited sub-Arctic hotspot has been found. However, studies so far have mostly focused on effect of gradual single or trophic groups. We assess zooplankton, fish zoobenthos assemblages (130 23 groups) found heterogeneous response to ongoing warming. Temporally constrained cluster analysis showed that was not...
Understanding how climate influences ecosystems is complicated by the many correlated and interrelated impacting factors. Here we quantify effects on Calanus finmarchicus in northeastern Norwegian Sea southwestern Barents Sea. By combining oceanographic drift models statistical analyses of field data from 1959 to 1993 investigating across trophic levels, are able elucidate pathways which zooplankton. The results show that both chlorophyll biomass spring C. summer relate positively a...
Arctic copepods are major grazers and vital food for planktivores in polar ecosystems but challenging to observe due remoteness seasonal sea ice coverage. Models offer higher spatio-temporal resolution, individual-based models (IBMs) useful since they incorporate individual variability which characterizes most copepod populations. Here, we present an IBM of the Calanus glacialis, a key secondary producer regions Barents Sea. The model is coupled three-dimensional physical-biological model,...
Abstract Long-term data indicate that climatic fluctuations in the Barents Sea can have significant impacts on populations of euphausiids, capelin and cod, but it is unclear how current warming period area has altered trophic interactions among these taxa. The species composition distribution euphausiids; abundance, feeding habits capelin; cod euphausiids were analysed. Data from last decade suggest a shift spatial patterns intensity euphausiid–capelin link, reduction volatility population...
Abstract Zooplankton in the Barents Sea has been monitored a joint program by Norway and Russia using Juday (37 cm) WP2 (56 vertical plankton nets. We have compared nets two studies (2007 2013) with mounted side on common frame. collected consistently more zooplankton biomass than Juday, 15–20% for both studies. Higher catch small medium size fractions as well total suggest that difference was not due to extrusion or escape of organisms through meshes, but rather amounts flow filtration...
The Barents Sea is a nursery area for many fish stocks, and this whole region presently subject to rapid climatic change from cold period in the 1980s record warm latest decade, with peak 2016. present study focuses exclusively on year 2016, which was characterized by air seawater an exceptionally large horizontal coverage of Atlantic waters. Earlier studies have suggested that environmental conditions during first life are most critical class strength development stocks. We focus 8 species...
Abstract Our research focused on the analysis of interannual variability zooplankton in Kola Section (the Barents Sea) period current warming Arctic basing previously unpublished data. The community was investigated based 240 plankton samples, collected late May–early June 2009–2017. A total 74 taxa nine phyla were identified but copepods most diverse and numerous taxonomic group. biodiversity index varied considerably from year to year, a stable tendency for increase since beginning studied...
Mortality is notoriously difficult to estimate for zooplankton populations in the open ocean due confounding effect of advection. The vertical life table (VLT) approach commonly used, but has been shown be sensitive both spatial and temporal trends recruitment. Here, we mortality rates Calanus finmarchicus copepodites from spatiotemporally resolved data highly advective Norwegian Sea–Barents Sea spring summer. We apply VLT a statistical regression (SRA), specifically taking into account...
Abstract The vertical migrations performed by zooplankton at daily and seasonal scales are important for marine ecosystem dynamics biogeochemical cycles. We analysed associations between variation in abundance depth distribution of the copepod Calanus finmarchicus temperature predation pressure from visual (capelin herring) non-visual (ctenophores) predators, using data a > 30-year survey southwestern Barents Sea. abundances were significantly reduced upper waters with increased...