Haakon Hop
Biographic Data
| ID | 6820082 |
|---|---|
| NAME | Haakon Hop |
| GIVEN NAMES | Haakon |
| FAMILY NAME | Hop |
| SIGNATURE | HOP H |
| AFFILIATIONS | Norwegian Polar Institute |
| ORCID | 0000-0002-1054-9676 |
| VERIFIED | Yes |
| TOTAL WORKS | 8 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 8 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 0 |
Effects of early life history traits and warming on Arctic cod prewinter length and recruitment
The Arctic cod (Boreogadus saida) is a key species in Arctic marine ecosystems, adapted to extreme seasonality and cold environments. The overwintering survival and recruitment of age-0 Arctic cod heavily depend on achieving a sizable prewinter length (PWL) in their first year. Over the growth period, PWL is influenced by early life history traits, such as hatch date and size-at-hatch, and by environmental conditions, such as temperature and food…
Still Arctic?—The changing Barents Sea
The Barents Sea is one of the Polar regions where current climate and ecosystem change is most pronounced. Here we review the current state of knowledge of the physical, chemical and biological systems in the Barents Sea. Physical conditions in this area are characterized by large seasonal contrasts between partial sea-ice cover in winter and spring versus predominantly open water in summer and autumn. Observations over recent decades show that s…
The circumpolar impacts of climate change and anthropogenic stressors on Arctic cod ( Boreogadus saida ) and its ecosystem
Arctic cod (Boreogadus saida) is the most abundant forage fish in the Arctic Ocean. Here we review Arctic cod habitats, distribution, ecology, and physiology to assess how climate change and other anthropogenic stressors are affecting this key species. This review identifies vulnerabilities for different life stages across the entire distribution range of Arctic cod. We explore the impact of environmental (abiotic and biotic) and anthropogenic st…
The interactive effects of temperature and food consumption on growth of larval Arctic cod ( Boreogadus saida )
Understanding larval growth, mediated by the interaction of early life traits and environmental conditions, is crucial to elucidate population dynamics. We used a bioenergetic model as an integrative tool to simulate the growth of Arctic cod (Boreogadus saida) larvae and to test the sensitivity of modeled growth to temperature and food quantity and quality. The growth was computed as the energy gained through food consumption minus the energy los…
First Records of Atlantic Mackerel ( Scomber scombrus ) from the Svalbard Archipelago, Norway, with Possible Explanations for the Extension of Its Distribution
Atlantic mackerel (Scomber scombrus) were recorded in Isfjorden, Svalbard (78 ̊15ʹ N, 15 ̊11ʹ E) in late September 2013. This record is the northernmost known occurrence of mackerel in the Arctic and represents a possible northward expansion (of ca. 5 ̊ latitude) of its distributional range. The examined specimens of mackerel were between 7 and 11 years old, with a mean size of 39 cm and a mean weight of 0.5 kg. Examination of stomach contents in…
Aspects of Reproduction and Larval Biology of Arctic Cod ( Boreogadus saida )
Arctic cod (Boreogadus saida) were captured from Resolute Bay, Northwest Territories, shipped to Vancouver and reared in holding tanks for up to three years. Spawning and development of larvae were monitored in two separate years. Fish that were in the laboratory for less than one year spawned during the normal spawning period for wild fish, January to February. The timing of spawning was altered by water temperature and light regime. Elevated wa…
Occurrence of Arctic Cod ( Boreogadus Saida ) Schools and Their Vulnerability to Predation in the Canadian High Arctic
We document the occurrence of large schools of Arctic cod (Boreogadus saida) in the Barrow Strait region of the eastern Canadian Arctic during the open water season. Schools were most frequently observed near shore, often in depressions inside bays. Schools ranged up to 130 000 sq m surface area and contained on the order of 4 x 10**8 fish, weighing 12 000 tonnes. Evidence indicates that schools form before the arrival of predators, but when they…
Energy Flow through the Marine Ecosystem of the Lancaster Sound Region, Arctic Canada
This paper synthesizes the trophic dynamics of a Canadian arctic marine ecosystem in so far as it is known, using new data on primary production, zooplankton, the bivalve Mya truncata, and arctic cod (Boreogadus saida), as well as literature values for marine mammals and seabirds. The 98,000 sq km region has a high rate of primary production relative to other parts of arctic Canada. About 60 g C/sq. m are fixed annually, of which approximately 90…
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Energy Flow through the Marine Ecosystem of the Lancaster Sound Region, Arctic Canada
This paper synthesizes the trophic dynamics of a Canadian arctic marine ecosystem in so far as it is known, using new data on primary production, zooplankton, the bivalve Mya truncata, and arctic cod (Boreogadus saida), as well as literature values for marine mammals and seabirds. The 98,000 sq km region has a high rate of primary production relative to other parts of arctic Canada. About 60 g C/sq. m are fixed annually, of which approximately 90…
Occurrence of Arctic Cod ( Boreogadus Saida ) Schools and Their Vulnerability to Predation in the Canadian High Arctic
We document the occurrence of large schools of Arctic cod (Boreogadus saida) in the Barrow Strait region of the eastern Canadian Arctic during the open water season. Schools were most frequently observed near shore, often in depressions inside bays. Schools ranged up to 130 000 sq m surface area and contained on the order of 4 x 10**8 fish, weighing 12 000 tonnes. Evidence indicates that schools form before the arrival of predators, but when they…
Aspects of Reproduction and Larval Biology of Arctic Cod ( Boreogadus saida )
Arctic cod (Boreogadus saida) were captured from Resolute Bay, Northwest Territories, shipped to Vancouver and reared in holding tanks for up to three years. Spawning and development of larvae were monitored in two separate years. Fish that were in the laboratory for less than one year spawned during the normal spawning period for wild fish, January to February. The timing of spawning was altered by water temperature and light regime. Elevated wa…
First Records of Atlantic Mackerel ( Scomber scombrus ) from the Svalbard Archipelago, Norway, with Possible Explanations for the Extension of Its Distribution
Atlantic mackerel (Scomber scombrus) were recorded in Isfjorden, Svalbard (78 ̊15ʹ N, 15 ̊11ʹ E) in late September 2013. This record is the northernmost known occurrence of mackerel in the Arctic and represents a possible northward expansion (of ca. 5 ̊ latitude) of its distributional range. The examined specimens of mackerel were between 7 and 11 years old, with a mean size of 39 cm and a mean weight of 0.5 kg. Examination of stomach contents in…
The interactive effects of temperature and food consumption on growth of larval Arctic cod ( Boreogadus saida )
Understanding larval growth, mediated by the interaction of early life traits and environmental conditions, is crucial to elucidate population dynamics. We used a bioenergetic model as an integrative tool to simulate the growth of Arctic cod (Boreogadus saida) larvae and to test the sensitivity of modeled growth to temperature and food quantity and quality. The growth was computed as the energy gained through food consumption minus the energy los…
Still Arctic?—The changing Barents Sea
The Barents Sea is one of the Polar regions where current climate and ecosystem change is most pronounced. Here we review the current state of knowledge of the physical, chemical and biological systems in the Barents Sea. Physical conditions in this area are characterized by large seasonal contrasts between partial sea-ice cover in winter and spring versus predominantly open water in summer and autumn. Observations over recent decades show that s…
The circumpolar impacts of climate change and anthropogenic stressors on Arctic cod ( Boreogadus saida ) and its ecosystem
Arctic cod (Boreogadus saida) is the most abundant forage fish in the Arctic Ocean. Here we review Arctic cod habitats, distribution, ecology, and physiology to assess how climate change and other anthropogenic stressors are affecting this key species. This review identifies vulnerabilities for different life stages across the entire distribution range of Arctic cod. We explore the impact of environmental (abiotic and biotic) and anthropogenic st…
Effects of early life history traits and warming on Arctic cod prewinter length and recruitment
The Arctic cod (Boreogadus saida) is a key species in Arctic marine ecosystems, adapted to extreme seasonality and cold environments. The overwintering survival and recruitment of age-0 Arctic cod heavily depend on achieving a sizable prewinter length (PWL) in their first year. Over the growth period, PWL is influenced by early life history traits, such as hatch date and size-at-hatch, and by environmental conditions, such as temperature and food…
Arctic (8 works) · Biology (7 works) · Ecology (7 works) · Oceanography (7 works) · Environmental Science (6 works) · Fishery (6 works) · Geology (5 works) · Marine and fisheries research (5 works) · Fish Ecology and Management Studies (4 works) · Geography (4 works)