Distinction among North Atlantic cod Gadus morhua stocks by tissue fatty acid profiles

2014 ◽  
Vol 84 (6) ◽  
pp. 1904-1925 ◽  
Author(s):  
H. Joensen ◽  
O. Grahl-Nielsen
Keyword(s):  
Fatty Acid ◽  
North Atlantic ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Fatty Acid Profiles ◽  
Tissue Fatty Acid

Influence of climatic changes on the parasites of Atlantic cod Gadus morhua off coastal Labrador, Canada

2006 ◽  
Vol 80 (2) ◽  
pp. 193-197 ◽  
Author(s):  
R.A. Khan ◽  
C.V. Chandra
Keyword(s):  
North Atlantic ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Age Groups ◽  
Climatic Conditions ◽  
Otter Trawl ◽  
Commercial Fishery ◽  
Metazoan Parasites ◽  
Mean Values ◽  
The North

AbstractA study was conducted in 2000 and 2003, following the collapse of the commercial fishery in 1990, to compare metazoan parasites of Atlantic cod Gadus morhua, captured off coastal Labrador, with samples taken in 1980 and 1986. Fish were captured by otter trawl offshore in the North Atlantic Fish Organisation subarea 2J. Parasites were removed from the digestive tract, stained, identified and compared between the different groups. Both the prevalence and mean abundance of trematodes, larval nematodes and E. gadi were significantly lower in fish taken in 2000 and 2003 than in 1980. While mean values of trematodes and nematodes declined in 1986, those of Echinorhynchus gadi remained unchanged in 1986 and 1990. Four-year-old cod sampled in 1990 harboured significantly fewer E. gadi than older age groups. The most commonly occurring trematodes included Podocotylereflexa, Lepidapedon elongatum, Derogenes varicus and Hemiurus levinseni while the larval nematode, Anisakis sp. was predominant. Comparison of offshore samples taken in 2000 and 2003 with others taken in previous years suggests an overall decline of parasites coincident with a change in climatic conditions, the absence of a major food source, namely capelin Mallotus villosus, of cod and ultimately the decline of the Labrador population.

scholarly journals Diet-induced differences in the essential fatty acid (EFA) compositions of larval Atlantic cod (Gadus morhua L.) with reference to possible effects of dietary EFAs on larval performance

2006 ◽  
Vol 63 (2) ◽  
pp. 302-310 ◽  
Author(s):  
C.J. Cutts ◽  
J. Sawanboonchun ◽  
C. Mazorra de Quero ◽  
J.G. Bell
Keyword(s):  
Fatty Acid ◽  
Essential Fatty Acid ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Lipid Level ◽  
Larval Growth ◽  
Somatic Tissue ◽  
Larval Performance ◽  
Experimental Diet ◽  
Live Feed

Abstract We studied the performance of cod rearing in which live feed was given under three different essential fatty acid (EFA) enrichment regimes, using commercially available live-feed enrichments. We assessed the fatty acid profile [docosahexaenoic (DHA), eicosapentaenoic (EPA), and arachidonic acid (AA)] in larval somatic tissue, relative to its amounts in both rotifers and Artemia as well as to larval performance. Overall, percentage lipid level of each experimental diet for the trial was approximately 50%. Further, there were no significant differences in total fatty acid levels of larvae from each treatment at the end of the trial (mean = 444.76 μg fatty acid per mg lipid). However, during the rotifer phase, larvae from each treatment were able to incorporate comparable levels of %DHA, irrespective of levels in the diet. Despite this, the rotifer diet with more %DHA still promoted better larval growth than other treatments. Conversely, larvae from two of the treatments did not exhibit any accumulation of AA, reflecting levels found in the diet instead. However, between-tank differences in larval %AA showed improved growth during the rotifer period when larval %AA was high. Low ratios of EPA had no effect. During the Artemia phase, percentage levels of larval DHA decreased; there was no accumulation of DHA relative to dietary levels, which in Artemia were significantly lower than in rotifers (6 cf. 20–30%). However, DHA levels in larvae at the end of the experiment correlated positively with survival. Artemia contained lower levels of AA than rotifers (1.5 cf. 3.0%), yet comparable levels of AA were found in rotifer-fed and Artemia-fed larvae. This also differed significantly between treatments, and correlated positively with survival.

scholarly journals Bacterial composition and succession during storage of North-Atlantic cod (Gadus morhua) at superchilled temperatures

2009 ◽  
Vol 9 (1) ◽  
pp. 250 ◽  
Author(s):  
Eyjólfur Reynisson ◽  
Hélène L Lauzon ◽  
Hannes Magnússon ◽  
Rósa Jónsdóttir ◽  
Guðrún Ólafsdóttir ◽  
...  
Keyword(s):  
North Atlantic ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Bacterial Composition

scholarly journals Effects of olive and fish oil Ca soaps in ewe diets on milk fat and muscle and subcutaneous tissue fatty-acid profiles of suckling lambs

animal ◽  
2014 ◽  
Vol 8 (7) ◽  
pp. 1178-1190 ◽  
Author(s):  
B. Gallardo ◽  
P. Gómez-Cortés ◽  
A.R. Mantecón ◽  
M. Juárez ◽  
T. Manso ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Fish Oil ◽  
Milk Fat ◽  
Subcutaneous Tissue ◽  
Fatty Acid Profiles ◽  
Tissue Fatty Acid
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