Allan Moses in which he was described as "our Grand Manan ornithologist", who "makes birds his specialty and his pastime". John Thomas Moses died in 1885. His son John Russell Moses, born in 1853, was Allan Moses's father. John Russell Moses learned taxidermy from his father and continued to build the family collection of mounted bird specimens, while prospering as a businessman. He was one of Grand Manan's major fish buyers, with a processing plant in North Head. Part of his business was selling the dried swim bladders of hake for the manufacture of isinglass. This was highly profitable, as the bladders
Fish kill temperatures drop below and die when it reaches . Thus, tilapia that have survived and successfully reproduced in Florida are occasionally killed by a winter cold front. In January, 2011, a selective fish kill affecting an estimated 2 million juvenile spot fish was attributed to a combination of cold stress and overpopulation after a particularly large spawn. Underwater explosions can lead to fish kill, and fish with swim bladders are more susceptible. Sometimes underwater explosions are used on purpose to induce fish kills, a generally illegal practice known as blast fishing. Underwater explosions may be accidental or planned, such as