12/08/2026
🚨 EXPOSING THE BROKEN SCIENCE BEHIND THE WA FISHING BAN 🚨
The state government loves to hide behind closed cabinet doors and claim their sweeping demersal fishing bans are backed by "unequivocal science." But when you actually test their official DPIRD models against independent fisheries biology and population dynamics, the whole narrative falls apart.
Here is how the government's core arguments collapse under true scientific scrutiny:
📉 1. The "Virgin Biomass" Scare Tactic
DPIRD claims species like the WA Dhufish are on the brink of extinction because their spawning biomass is down roughly 80% from pristine, pre-exploitation baselines.
The Scientific Reality: Measuring an exploited population against a hypothetical 1800s untouched frontier is an administrative baseline, not an extinction metric. Modern fisheries science globally recognizes that long-term sustainable equilibrium can be successfully maintained at lower biomass thresholds without causing recruitment failure. Conflating historical depletion with imminent biological collapse is pure scaremongering.
đź“Ź 2. The Size-vs-Age Truncation Fallacy
The department points to otolith (ear bone) samples showing a lack of 30-to-40-year-old fish, arguing that older "mega-spawners" have been wiped out.
The Scientific Reality: Fish growth rates plateau significantly as they age, meaning physical size does not map linearly to chronological age. Furthermore, modern reproductive biology proves that medium-sized, younger mature cohorts drive successful recruitment when environmental conditions align. Blaming stock pressure entirely on the absence of ancient fish ignores natural mortality and cohort dynamics.
🌊 3. Ignoring the Environmental Ocean Lottery
The management model assumes a direct, linear relationship between human extraction limits and stock recovery, demanding fixed multi-year lockouts to hit rigid recovery timelines.
The Scientific Reality: The West Coast Bioregion is an oligotrophic (nutrient-poor) system driven by the Leeuwin Current. Demersal species experience pulsed recruitment—meaning successful juvenile survival happens episodically when oceanographic conditions and water temperatures align, regardless of whether adult biomass is at 20% or 40%. Treating the ocean like a predictable farm paddock ignores how nature actually works.
🏗️ 4. The Single-Species Blind Spot
DPIRD's models isolate human hook-and-line fishing as the sole variable impacting fish stocks while ignoring everything else happening in the marine environment.
The Scientific Reality: Decades of strict conservation have driven an exponential explosion in apex predator populations (like protected sharks) along our coast, placing heavy natural pressure on demersal stocks. At the same time, heavy industrial dredging, port expansions, and offshore seismic testing are greenlit by other government departments in vital marine habitats. Isolating recreational fishers while ignoring cumulative industrial and ecological impacts is fundamentally dishonest science.
They didn't implement a sledgehammer ban because of sound, holistic science—they did it because it's the easiest thing to manage on a spreadsheet.
Share this if you want transparent, honest, and truly adaptive management of our marine estate instead of political spin! 👇
https://www.gofundme.com/f/wa-commercial-fishermen-fighting-fund
