scholarly journals Divergent responses of Atlantic cod to ocean acidification and food limitation

2019 ◽  
Vol 25 (3) ◽  
pp. 839-849 ◽  
Author(s):  
Martina H. Stiasny ◽  
Michael Sswat ◽  
Felix H. Mittermayer ◽  
Inger‐Britt Falk‐Petersen ◽  
Nalani K. Schnell ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Atlantic Cod ◽  
Food Limitation

Severe tissue damage in Atlantic cod larvae under increasing ocean acidification

2011 ◽  
Vol 2 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Andrea Y. Frommel ◽  
Rommel Maneja ◽  
David Lowe ◽  
Arne M. Malzahn ◽  
Audrey J. Geffen ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Tissue Damage ◽  
Atlantic Cod ◽  
Atlantic Cod Larvae ◽  
Severe Tissue

scholarly journals Risk Assessment for Key Socio-Economic and Ecological Species in a Sub-Arctic Marine Ecosystem Under Combined Ocean Acidification and Warming

Ecosystems ◽  
2021 ◽  
Author(s):  
Maartje Oostdijk ◽  
Erla Sturludóttir ◽  
Maria J. Santos
Keyword(s):  
Ocean Acidification ◽  
Atlantic Cod ◽  
Marine Ecosystem ◽  
Keystone Species ◽  
Ecosystem Model ◽  
The Arctic ◽  
Predatory Fish ◽  
Important Species ◽  
Cascading Effects ◽  
Icelandic Waters

AbstractThe Arctic may be particularly vulnerable to the consequences of both ocean acidification (OA) and global warming, given the faster pace of these processes in comparison with global average speeds. Here, we use the Atlantis ecosystem model to assess how the trophic network of marine fishes and invertebrates in the Icelandic waters is responding to the combined pressures of OA and warming. We develop an approach where we first identify species by their economic (catch value), social (number of participants in fisheries), or ecological (keystone species) importance. We then use literature-determined ranges of sensitivity to OA and warming for different species and functional groups in the Icelandic waters to parametrize model runs for different scenarios of warming and OA. We found divergent species responses to warming and acidification levels; (mainly) planktonic groups and forage fish benefited while (mainly) benthic groups and predatory fish decreased under warming and acidification scenarios. Assuming conservative harvest rates for the largest catch-value species, Atlantic cod, we see that the population is projected to remain stable under even the harshest acidification and warming scenario. Further, for the scenarios where the model projects reductions in biomass of Atlantic cod, other species in the ecosystem increase, likely due to a reduction in competition and predation. These results highlight the interdependencies of multiple global change drivers and their cascading effects on trophic organization, and the continued high abundance of an important species from a socio-economic perspective in the Icelandic fisheries.

Comparative Survival and Growth of Two Strains of Atlantic Cod (Gadus morhua) through the Early Life Stages in a Marine Pond

1994 ◽  
Vol 51 (5) ◽  
pp. 1012-1023 ◽  
Author(s):  
Geir Blom ◽  
Terje Svåsand ◽  
Knut E. Jørstad ◽  
Håkon Otterå ◽  
Ole I. Paulsen ◽  
...  
Keyword(s):  
Body Size ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Larval Mortality ◽  
Food Limitation ◽  
Juvenile Stage ◽  
Average Growth ◽  
Juvenile Mortality ◽  
Early Juvenile Stage ◽  
Survival And Growth

Survival and growth of two strains of Atlantic cod (Gadus morhua) were compared through the larval and juvenile stages in a marine pond in western Norway in 1990 and 1991. Strain A was homozygous for the genetic marker allele GPI-1*30 at the glucose phosphate isomerase (GPI) locus expressed in white muscle, and Strain B possessed other GPI-1* genotypes, in 1990 the frequency of Strain B increased significantly from the larval to the juvenile stage; however, in 1991 the frequency of Strain A increased slightly but not significantly from the larval to the juvenile phase. Larval mortality did not differ significantly between strains any year, but juvenile mortality was significantly lower in Strain B in 1990 and Strain A in 1991. Average growth rates in length estimated from regressions were not significantly different between strains during the larval and juvenile period any year, but initial length was significantly larger in Strain B in 1990 and Strain A in 1991. Our results indicated that food limitation during the early juvenile stage induced differential size-selective mortality among the strains due to small differences in body size and actual age between strains. Body size did not become important for survival until the food-limited regime had occurred.

scholarly journals New encounters in Arctic waters: a comparison of metabolism and performance of polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) under ocean acidification and warming

Polar Biology ◽  
2016 ◽  
Vol 39 (6) ◽  
pp. 1137-1153 ◽  
Author(s):  
Kristina Lore Kunz ◽  
Stephan Frickenhaus ◽  
Silvia Hardenberg ◽  
Torild Johansen ◽  
Elettra Leo ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Polar Cod ◽  
Boreogadus Saida ◽  
Polar Cod Boreogadus Saida ◽  
And Performance

scholarly journals Pilot study to investigate the effect of long-term exposure to high pCO2 on adult cod (Gadus morhua) otolith morphology and calcium carbonate deposition

2021 ◽  
Author(s):  
Clara Coll-Lladó ◽  
Felix Mittermayer ◽  
Paul Brian Webb ◽  
Nicola Allison ◽  
Catriona Clemmesen ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Pilot Study ◽  
Ocean Acidification ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
High Pco2 ◽  
Juvenile Stages ◽  
Calcium Carbonate Deposition ◽  
Present Pilot Study

AbstractTo date the study of ocean acidification on fish otolith formation has been mainly focused on larval and juvenile stages. In the present pilot study, wild-captured adult Atlantic cod (Gadus morhua) were exposed to two different levels of pCO2, 422µatm (ambient, low pCO2) or 1091µatm (high pCO2), for a period of 30 weeks (from mid-October to early April 2014–2015) in order to study the effects on otolith size, shape and CaCO3 crystallization amongst other biological parameters. We found that otoliths from cod exposed to high pCO2 were slightly smaller (− 3.4% in length; − 3.3% in perimeter), rounder (− 2.9% circularity and + 4% roundness) but heavier (+ 5%) than the low pCO2 group. Interestingly, there were different effects in males and females; for instance, male cods exposed to high pCO2 exhibited significant changes in circularity (− 3%) and roundness (+ 4%) compared to the low pCO2 males, but without significant changes on otolith dimensions, while females exposed to high pCO2 had smaller otoliths as shown for length (− 5.6%), width (− 2%), perimeter (− 3.5%) and area (− 4.8%). Furthermore, while the majority of the otoliths analysed showed normal aragonite deposition, 10% of fish exposed to 1091µatm of pCO2 had an abnormal accretion of calcite, suggesting a shift on calcium carbonate polymorph crystallization in some individuals under high pCO2 conditions. Our preliminary results indicate that high levels of pCO2 in adult Atlantic cod might affect otolith growth in a gender-specific way. Our findings reveal that otoliths from adult cod are affected by ocean acidification, and we believe that the present study will prompt further research into this currently under-explored area.

scholarly journals Ocean acidification and food limitation combine to suppress herbivory by the gastropod Lacuna vincta

2019 ◽  
Vol 627 ◽  
pp. 83-94 ◽  
Author(s):  
CS Young ◽  
A Lowell ◽  
B Peterson ◽  
CJ Gobler
Keyword(s):  
Ocean Acidification ◽  
Food Limitation ◽  
Lacuna Vincta

scholarly journals Effects of ocean acidification and warming on the mitochondrial physiology of Atlantic cod

2014 ◽  
Vol 1837 ◽  
pp. e26 ◽  
Author(s):  
Leo Elettra ◽  
Daniela Storch ◽  
Hans-Otto Poertner ◽  
Felix C. Mark
Keyword(s):  
Ocean Acidification ◽  
Atlantic Cod

scholarly journals Ocean Acidification Effects on Atlantic Cod Larval Survival and Recruitment to the Fished Population

PLoS ONE ◽  
2016 ◽  
Vol 11 (8) ◽  
pp. e0155448 ◽  
Author(s):  
Martina H. Stiasny ◽  
Felix H. Mittermayer ◽  
Michael Sswat ◽  
Rüdiger Voss ◽  
Fredrik Jutfelt ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Atlantic Cod ◽  
Larval Survival
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