Sentence examples for spawning cod from inspiring English sources

It was the spawning cod that brought human beings to these Arctic islands some 10,000 years ago, and fishing is still the only real industry.

But by 1992, the biomass of spawning cod off Newfoundland and Labrador had fallen to only 22,000 tonnes, compared with 1.6m tonnes 30 years earlier.

Despite recent measures such as minimum mesh sizes and temporary fishery closures to protect spawning cod stocks [56], cod spawning biomass around the Firth of Clyde has reached an historical low [57].

Future research should seek to discern the effects of both salmon and cod farms during the spawning season for cod resident in fjords containing farms, as a range of different effects are possible during this period, including mass spawning of farmed cod in cod farms [37] and possible avoidance of fjords containing salmon farms by spawning cod [38].

In fact, no spawning cod younger than 6 years of age carried the Pan IBB genotype.

In the present study, we have shown a gradual decline in the frequency of the Pan IBB genotype among spawning cod during the last 60 years.

We assume it takes 5 months in total to migrate south to the spawning area, spawn (cod may produce up to 20 batches of eggs that each needs to mature; Kjesbu et al. 1996), and to migrate back north again.

The habitat actually used for courtship and spawning by cod is likely a relatively small subset of what has been defined as cod spawning grounds by humans.

Using a molecular marker known to be under selection (Pan I) along with a suite of six neutral microsatellite loci, we analysed an archived data set and revealed evidence of distinct temporal changes in the frequencies of genotypes at the Pan I locus among spawning Icelandic cod, collected between 1948 and 2002, a period characterized by high fishing pressure.

We examined somatic and survival costs of reproduction in captive iteroparous, batch-spawning Atlantic cod (Gadus morhua), utilizing diploids and triploids, knowing that triploid females invest little to no energy into gametogenesis.

There is therefore a need for updated information on cod spawning activity and specific locations of spawning grounds in the area.