Atlantic Cod

Brander, Keith

doi:10.1002/9781119460701

Cited by 5 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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Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

Dahlke

Puvanendran

Mortensen³

et al. 2022

Journal of Fish Biology

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Impacts of global warming and CO2‐related ocean acidification (OA) on fish reproduction may include chronic effects on gametogenesis and gamete quality, as well as acute effects on external fertilisation. Here, temperature thresholds and OA‐sensitivity of gametogenesis and fertilisation were investigated in Atlantic cod, Gadus morhua. Three broodstock groups of farmed cod (FC 1–3) were exposed for 3 months to three maturation conditions (FC 1: control, 6°C/400 μatm CO2; FC 2: warming, 9.5°C/400 μatm; FC 3: warming and OA, 9.5°C/1100 μatm). In addition, a broodstock group of wild cod (WC) was kept at control conditions to compare the acute temperature window of fertilisation with that of farmed cod (FC 1). Fertilisations were conducted in a temperature‐gradient table at 10 temperatures (between −1.5 and 12°C) and two CO2 levels (400/1100 μatm). In FC 1 and WC, fertilisation success was relatively high between 0.5°C and 11°C (TRange of c. 10.5°C), indicating similar gamete quality in farmed and wild broodstocks kept at control conditions. Exposure of farmed broodstocks to warming (FC 2) and the combination of warming and OA (FC 3) impaired gamete quality, causing a reduction in fertilisation success of −20% (FC 2) and − 42% (FC 3) compared to FC 1. The acute temperature window of fertilisation narrowed from FC 1 (TRange = 10.4°C) to FC 2 (TRange = 8.8°C) and FC 3 (TRange = 5.9°C). Acute effects of CO2 on fertilisation success were not significant. This study demonstrates potential climate change impacts on gametogenesis and fertilisation in Atlantic cod, suggesting the loss of spawning habitat in the coming decades.

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Atlantic Cod

Cited by 5 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

Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

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Atlantic Cod

Cited by 5 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

Broodstock exposure to warming and elevated pCO2 impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod

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Product

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Broodstock exposure to warming and elevated pCO₂ impairs gamete quality and narrows the temperature window of fertilisation in Atlantic cod