Atlantic Cod

Brander, Keith

doi:10.1002/9781119460701

Cited by 6 publications

(1 citation statement)

References 120 publications

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“…The GOA Pacific cod stock has a long history of exploitation with an increase in fishing mortality since 1980. However exploitation rates have remained low (Figure 7) in comparison to other gadid stocks in other regions (Rose, 2019). The species is relatively short-lived (maximum age of 14) and there hasn't been significant truncation of the age distribution .…”

Section: Pacific Cod Stock Assessmentmentioning

confidence: 92%

Marine Heatwave Stress Test of Ecosystem-Based Fisheries Management in the Gulf of Alaska Pacific Cod Fishery

2020

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Section: Pacific Cod Stock Assessmentmentioning

confidence: 92%

Marine Heatwave Stress Test of Ecosystem-Based Fisheries Management in the Gulf of Alaska Pacific Cod Fishery

2020

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Five centuries of cod catches in Eastern Canada

Schijns

Froese

Hutchings

et al. 2021

ICES Journal of Marine Science

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The fishery for Northern Atlantic cod (Gadus morhua) off Newfoundland and Labrador, Eastern Canada, presents the most spectacular case of an exploited stock crashed in a few decades by an industrial bottom trawl fishery under a seemingly sophisticated management regime after half a millennium of sustainable fishing. The fishery, which had generated annual catches of 100000 to 200000 tonnes from the beginning of the 16th century to the 1950s, peaked in 1968 at 810000 tonnes, followed by a devastating collapse and closure 24 years later. Since then, stock recovery may have been hindered by premature openings, with vessels targeting the remains of the cod population. Previous research paid little attention towards using multicentury time series to inform sustainable catches and recovery plans. Here, we show that a simple stock assessment model can be used to model the cod population trajectory for the entire period from 1508 to 2019 for which catch estimates are available. The model suggests that if fishing effort and mortality had been stabilized in the 1980s, precautionary annual yields of about 200000 tonnes could have been sustained. Our analysis demonstrates the value of incorporating prior knowledge to counteract shifting baseline effects on reference points and contemporary perceptions of historical stock status.

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On the Retention of Cod Early Life Stages Spawned at Jan Mayen

Frøysa,

Bogstad,

Williams

et al. 2024

Fisheries Oceanography

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The Jan Mayen shelf has recently been identified as a spawning area for cod (Gadus morhua). Genetic analyses and otolith types of adult cod caught in the Jan Mayen area show that they are of mixed origin, from both Iceland and the Barents Sea. However, they are genetically different from both stocks indicating the possibility of a cod stock around Jan Mayen. Motivated by this, we investigate the potential for eggs and larvae of cod to stay behind at Jan Mayen after spawning, which would be a requirement for having a self‐sustained stock. This is done using a numerical model for larval drift and growth, similarly to what has been done for other cod stocks. Using the modelled drift, we compare the proportion of larvae retained in different years to the strength of year classes as indicated by fisheries data. We find that even if most individuals are transported away from Jan Mayen, there are still some years where a significant proportion (more than 20%) of the larvae remains at the time of settlement in October–November. However, the year‐to‐year variability is large, with almost no individuals remaining in certain years. Our results suggest that aggregated over years, the amount of larvae that reach the age of bottom settlement on the Jan Mayen shelf area could be sufficient to give a potential for a self‐sustained cod population. In addition, we find that the main drift direction away from Jan Mayen is southwest towards East Greenland.

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Atlantic Cod

Cited by 6 publications

References 120 publications

Marine Heatwave Stress Test of Ecosystem-Based Fisheries Management in the Gulf of Alaska Pacific Cod Fishery

Marine Heatwave Stress Test of Ecosystem-Based Fisheries Management in the Gulf of Alaska Pacific Cod Fishery

Five centuries of cod catches in Eastern Canada

On the Retention of Cod Early Life Stages Spawned at Jan Mayen

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