scholarly journals Effects of ocean acidification on the calcification of otoliths of larval Atlantic cod Gadus morhua

2013 ◽  
Vol 477 ◽  
pp. 251-258 ◽  
Author(s):  
RH Maneja ◽  
AY Frommel ◽  
AJ Geffen ◽  
A Folkvord ◽  
U Piatkowski ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Gadus Morhua ◽  
Atlantic Cod

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 Transcriptome profiling reveals exposure to predicted end-of-century ocean acidification as a stealth stressor for Atlantic cod larvae

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
F. H. Mittermayer ◽  
M. H. Stiasny ◽  
C. Clemmesen ◽  
T. Bayer ◽  
V. Puvanendran ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Gadus Morhua ◽  
Molecular Mechanisms ◽  
Atlantic Cod ◽  
Transcriptome Profiling ◽  
Direct Consequence ◽  
Differentially Expressed ◽  
Cellular Stress Response ◽  
Atlantic Cod Larvae ◽  
Developmental Asynchrony

AbstractOcean acidification (OA), a direct consequence of increasing atmospheric CO2 concentration dissolving in ocean waters, is impacting many fish species. Little is known about the molecular mechanisms underlying the observed physiological impacts in fish. We used RNAseq to characterize the transcriptome of 3 different larval stages of Atlantic cod (Gadus morhua) exposed to simulated OA at levels (1179 µatm CO2) representing end-of-century predictions compared to controls (503 µatm CO2), which were shown to induce tissue damage and elevated mortality in G. morhua. Only few genes were differentially expressed in 6 and 13 days-post-hatching (dph) (3 and 16 genes, respectively), during a period when maximal mortality as a response to elevated pCO2 occurred. At 36 dph, 1413 genes were differentially expressed, most likely caused by developmental asynchrony between the treatment groups, with individuals under OA growing faster. A target gene analysis revealed only few genes of the universal and well-defined cellular stress response to be differentially expressed. We thus suggest that predicted ocean acidification levels constitute a “stealth stress” for early Atlantic cod larvae, with a rapid breakdown of cellular homeostasis leading to organismal death that was missed even with an 8-fold replication implemented in this study.

scholarly journals Temperature Modulates the Effects of Ocean Acidification on Intestinal Ion Transport in Atlantic Cod, Gadus morhua

2016 ◽  
Vol 7 ◽  
Author(s):  
Marian Y. Hu ◽  
Katharina Michael ◽  
Cornelia M. Kreiss ◽  
Meike Stumpp ◽  
Sam Dupont ◽  
...  
Keyword(s):  
Ion Transport ◽  
Ocean Acidification ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Intestinal Ion Transport

Effects of ocean acidification increase embryonic sensitivity to thermal extremes in Atlantic cod, Gadus morhua

2016 ◽  
Vol 23 (4) ◽  
pp. 1499-1510 ◽  
Author(s):  
Flemming T. Dahlke ◽  
Elettra Leo ◽  
Felix C. Mark ◽  
Hans‐Otto Pörtner ◽  
Ulf Bickmeyer ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Gadus Morhua ◽  
Atlantic Cod

Effects of temperature on life history set the sensitivity to fishing in Atlantic cod Gadus morhua

2014 ◽  
Vol 514 ◽  
pp. 217-229 ◽  
Author(s):  
HY Wang ◽  
LW Botsford ◽  
JW White ◽  
MJ Fogarty ◽  
F Juanes ◽  
...  
Keyword(s):  
Life History ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Effects Of Temperature

Responses of Atlantic cod Gadus morhua head kidney leukocytes to phytase produced by gastrointestinal-derived bacteria

2009 ◽  
Vol 36 (4) ◽  
pp. 883-891 ◽  
Author(s):  
Carlo C. Lazado ◽  
Christopher Marlowe A. Caipang ◽  
Sanchala Gallage ◽  
Monica F. Brinchmann ◽  
Viswanath Kiron
Keyword(s):  
Gadus Morhua ◽  
Atlantic Cod ◽  
Head Kidney
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