Sustainable Fishing Secret: Ancient Cast Net Technique in Urban Canal!

Описание: "​When rivers run shallow, wisdom flows deeper.​​" Witness a centuries-old survival skill thriving in modern cities: this shirtless angler’s rubberized cast net blossoms over a concrete canal—fingers spread to control weighted edges as physics takes charge. Notice the ​perfection of motion: his torso rotates at ​45° torque​ (weight shift stabilizing his crouch), while the net’s lead-lined rim unfurls into a 2.5-meter disk exploiting ​air resistance geometry. How does it work? Water tension instantly sinks weights, trapping fish in the nylon mesh’s "inverted umbrella" before escape—a design honed since Roman times to harvest only mature targets, sparing juveniles and eggs (critical ecological ethics!). Why does it matter? With global fish stocks crashing, this method avoids plastic-monofilament ghost nets killing 300,000 marine mammals yearly; plus, canal fishing cleans invasive species choking urban waterways (study this silver carp leaping mid-background!). For better practice: weave ​biodegradable nets​ with hemp/nettle fibers (current nylon decays slower than pyramids), install grippy canal-edge pads (slippery concrete caused 78% falls in Tokyo cases), and always wear PFD life vests—shallow water drownings claim more lives than floods. Safety alert: metal rails (left) risk net-snagging tumbles—keep 3m clearance and avoid leaning! Each throw teaches balance: by respecting both nature’s limits and human ingenuity, we cast not just for food, but for our future.