Dr. Aarestrup said it was possible the tags created so much drag that they slowed the fish down.
Sharks also pick off the weakest, sickest and slowest fish, helping to prevent the spread of disease and parasites, and strengthening the gene pool of prey species.
Differences in VTG baseline levels in negative controls between the years 2013 and 2014 were probably due to the slower fish growth in the laboratory in 2013.
The evolutionary change in α t that we observed may be somewhat underestimated because slow growers are more likely to reproduce and die before being caught, i.e. natural mortality may be inversely proportional to size (Conover 2007) and slow growing fish are harvested at an older age because fishing targets fish above a certain size.
The association is not species-specific, but seem to require a resting or slow moving fish (Modica & Oliverio, unpublished observation).
However, once the first spawning opportunity has passed and even slow growing fish are large enough to have a moderate chance of survival in the ocean, it takes too long and exposes fish to too much risk of freshwater mortality to grow to a large enough size to spawn with much success as a resident female at an even older age.
The fact that we do not find this in Atlantic cod is consistent with previous results indicating that long-lived, slow growing fish including cod show no decline, and even increases, in reproductive success (Berkeley et al., 2004), which is in contrast to so many other species (Bonduriansky et al., 2008).
They're slow growing fish, so they pretty much will be growing their whole lives.
Even so, Lowe's best guess for the slow fishing on Saturday was that the fish were full.
We had slow fishing, but late in the morning we found a solitary tarpon laid up in a small bay.
