Which of the following is unlawful regarding lead sinkers and jigs?

The option indicating that lead sinkers and jigs measuring 2.5 inches or less and weighing 1 ounce or less is unlawful highlights an important aspect of fishing regulations aimed at minimizing environmental impact. Specifically, in many places, including certain jurisdictions in Maine, there are restrictions on the use of lead tackle due to its toxicity to aquatic life, particularly birds that may ingest lead while foraging for prey.

The regulations aim to protect wildlife from the detrimental effects of lead, which can cause poisoning in birds and other animals. The correct option indicates that the size and weight of lead sinkers or jigs may not necessarily exempt them from being used if they fall within certain safe limits. By specifying that lead sinkers/jigs of a certain size and weight are unlawful, the regulation intends to reduce lead contamination in water bodies, thereby protecting the ecosystem.

In contrast, the other options reflect permissible fishing practices as long as they adhere to the regulations concerning lead usage. By understanding these regulations, anglers can take responsible actions to protect the natural environment while enjoying their fishing activities.