Recruitment of Atlantic cod stocks in relation to temperature and advectlon of copepod populations

Sundby, Svein

doi:10.1080/00364827.2000.10414580

Cited by 223 publications

(159 citation statements)

References 77 publications

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“…This relationship was stronger than earlier temperature-recruitment studies have shown, which basically indicated that high temperature is just a necessary condition for good recruitment (Sundby, 2000). However, when the full 25-year simulation period became available, this relation was destroyed basically by the 1983 and 2003 year-classes, with respectively relatively good/bad recruitment in spite of quite cold/warm ambient temperatures.…”

Section: Physics and Cod Larvae Drift/ Growth And Recruitmentcontrasting

confidence: 60%

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An ecosystem modeling approach to predicting cod recruitment

Svendsen

Skogen

Budgell

et al. 2007

Deep Sea Research Part II: Topical Studies in Oceanography

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Section: Physics and Cod Larvae Drift/ Growth And Recruitmentcontrasting

confidence: 60%

“…However, temperature might be a proxy for other processes that may have important impacts on the ecosystem, e.g. water transports or zooplankton (Campana and Hurley, 1989;Sundby, 2000). In this paper we focus on the early life stages of northeast arctic cod, assuming that this is a critical phase for determining year class strength.…”

mentioning

confidence: 99%

An ecosystem modeling approach to predicting cod recruitment

Svendsen

Skogen

Budgell

et al. 2007

Deep Sea Research Part II: Topical Studies in Oceanography

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“…Because of its depleted status, it is difficult to specify the likely effect of climate change on spatial distribution (27). In contrast to BS cod, Northern cod live in an area with a strong latitudinal temperature gradient and a cold southward current (28,29), which should restrict a northward expansion of the stock. Baltic cod stands out as a special case in which the suitable habitat for early life stages (in terms of sufficient oxygen content and salinity), rather than for the adults, influences the population dynamics in this brackish environment (30,31).…”

mentioning

confidence: 99%

Synergies between climate and management for Atlantic cod fisheries at high latitudes

Kjesbu¹,

Bogstad²,

Devine³

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

182

189

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The widespread depletion of commercially exploited marine living resources is often seen as a general failure of management and results in criticism of contemporary management procedures. When populations show dramatic and positive changes in population size, this invariably leads to questions about whether favorable climatic conditions or good management (or both) were responsible. The Barents Sea cod (Gadus morhua) stock has recently increased markedly and the spawning stock biomass is now at an unprecedented high. We identify the crucial social and environmental factors that made this unique growth possible. The relationship between vital rates of Barents Sea cod stock productivity (recruitment, growth, and mortality) and environment is investigated, followed by simulations of population size under different management scenarios. We show that the recent sustained reduction in fishing mortality, facilitated by the implementation of a "harvest control rule," was essential to the increase in population size. Simulations show that a drastic reduction in fishing mortality has resulted in a doubling of the total population biomass compared with that expected under the former management regime. However, management alone was not solely responsible. We document that prevailing climate, operating through several mechanistic links, positively reinforced management actions. Heightened temperature resulted in an increase in the extent of the suitable feeding area for Barents Sea cod, likely offering a release from density-dependent effects (for example, food competition and cannibalism) through prolonged overlap with prey and improved adult stock productivity. Management and climate may thus interact to give a positive outlook for exploited high-latitude marine resources.gadoids | population dynamics | quota | ocean warming | polar displacement

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“…This circa 3-mm-long, lipid-rich species is an important food resource for juvenile Atlantic cod, herring, capelin and other small fishes in the southern Barents Sea (Dalpadado and Bogstad, 2004;Pedersen and Fossheim, 2008;Sundby, 2000). Atlantic boreal krill species such as Meganyctiphanes norvegica and Thysanoessa spp.…”

Section: Standing Stocks Of Zooplanktonmentioning

confidence: 99%

“…The influence of water inputs to the Chukchi and southern Barents Seas on fish productivity depends on conditions to the south Sundby, 2000). Importantly, there are significant differences in the properties of the water masses entering the seas from the south and in the amount of water that is advected south from the northern edges of these seas.…”

Section: Water Inputs and Their Sourcesmentioning

confidence: 99%