Final answer:
The rise of nylon gill net use is likely due to the decline in availability of traditional materials like silk and hemp during World War II, and the subsequent technological advancements that made nylon widely available. .
Step-by-step explanation:
The rise of nylon gill net use can be attributed to the development of new materials during and after World War II when the need for alternatives to traditional materials like silk and hemp became urgent. During the war, nylon was used to make parachutes, tires, and other military supplies due to shortages of silk and hemp.
A decline in the availability of traditional materials for fishing nets would be a likely cause for the switch to nylon. However, while government regulation of fishing aims at sustainability to prevent overfishing and ensure that fish populations are not driven to extinction, there is no direct indication that these regulations specifically promoted the use of nylon gill nets.
Moreover, other factors like the rising awareness of the impact of overharvesting on marine ecosystems and the subsequent push by environmentalists for strict fishing limits, as well as the influence of foreign agencies advocating for modern fishing equipment, could contribute to the increase in nylon gill net use.
The technological advancement that made nylon materials widely available after the war likely aided the transition. The answer to the specific test question was not stated in the provided references, so a confident answer cannot be given based on the given context.