As an outdoor writer and angler with over a decade of experience exploring America’s waterways, I’ve seen firsthand the impact of barotrauma on fish. The thrill of landing a beautiful trout stomach pump candidate, a hefty 16 inch bass, or even a trophy 22 inch bass can quickly turn to concern when you realize the fish is struggling to recover. Barotrauma, or pressure injury, is a common issue when fish are rapidly brought up from depth, and knowing how to respond is crucial for responsible angling. This guide will walk you through understanding barotrauma, the proper technique for performing a trout stomach pump, and best practices for releasing bass to give them the best chance of survival. We’ll focus on techniques applicable to freshwater species common across the USA.
Barotrauma occurs when the pressure surrounding a fish rapidly decreases as it’s reeled in from deeper water. This causes gases within the fish’s body – primarily in the swim bladder – to expand. This expansion can damage internal organs, including the swim bladder, stomach, and eyes. Symptoms of barotrauma include a distended abdomen, bulging eyes, and difficulty maintaining buoyancy. Fish exhibiting these signs are less likely to survive if simply released. According to the NOAA Fisheries, understanding the depth at which you’re fishing is the first step in mitigating barotrauma.
While the underlying cause is the same, barotrauma can manifest differently in trout and bass. Trout, with their more delicate swim bladders, often show more pronounced symptoms like severely bulging eyes. Bass, particularly larger ones like a 22 inch bass, may exhibit a distended abdomen and struggle to swim downwards. It’s important to quickly assess the fish for these signs before attempting to release it. If the fish appears relatively normal – swimming strongly and maintaining buoyancy – it likely doesn’t require intervention.
The deeper the fish is caught, the greater the risk of barotrauma. Generally, fish caught from depths exceeding 20 feet are more susceptible. Different species also have varying levels of susceptibility. As mentioned, trout are particularly vulnerable. Largemouth and Smallmouth Bass, while more resilient than trout, can still experience significant barotrauma when brought up quickly from deeper structure. The Leave No Trace Center for Outdoor Ethics emphasizes minimizing stress on fish, and understanding depth is a key component of that.
The trout stomach pump is a technique used to relieve pressure within a fish’s body by deflating its swim bladder. It’s a delicate procedure and should only be performed if you’re confident in your ability. Improper technique can cause further harm. I always recommend practicing on a non-vital fish (if legally permissible and ethically sound) before attempting it on a prized catch.
Important Note: Over-pumping can be just as harmful as not pumping at all. Stop when you feel minimal resistance. The goal is to relieve pressure, not completely deflate the swim bladder. The REI Expert Advice section on barotrauma provides excellent visual aids and further clarification.
While a trout stomach pump is often the primary intervention for trout, releasing bass – even a healthy-looking 16 inch bass or a larger 22 inch bass – requires careful consideration. Even without visible signs of barotrauma, bass can experience internal injuries. Here’s how to maximize their chances of survival.
Similar to the trout stomach pump, venting involves releasing gas from the swim bladder of bass. However, it’s generally considered a more invasive procedure and should only be performed by experienced anglers. The technique is similar to the trout pump, but requires even greater care and precision. The USDA Forest Service often provides workshops on responsible angling practices, including venting techniques.
If a bass is struggling to swim downwards, gently hold it horizontally in the water, facing into the current. This helps reorient its swim bladder and allows it to regain buoyancy control. Continue holding it until it swims off strongly on its own.
The longer a fish is out of the water, the greater the stress. Keep handling time to an absolute minimum. Wet your hands or wear wet gloves to protect the fish’s slime coat, which is its natural defense against infection.
Never touch the fish’s gills. They are extremely delicate and easily damaged. Damage to the gills can significantly reduce the fish’s ability to breathe.
Switching to barbless hooks makes hook removal much easier and less damaging to the fish. This is a simple change that can significantly improve survival rates.
While catch-and-photo is popular, it’s important to minimize the fish’s stress during the process. Keep the fish in the water as much as possible, and avoid prolonged exposure to air. Consider whether the photo is truly necessary, and prioritize the fish’s well-being.
Prevention is always better than cure. Here are some steps you can take to minimize the risk of barotrauma:
As anglers, we have a responsibility to protect the resources we enjoy. By understanding barotrauma and implementing these techniques – including knowing when and how to perform a trout stomach pump and how to safely release a 16 inch bass or a 22 inch bass – we can ensure the health and sustainability of our fisheries for generations to come.