Sofia Martinez
Plastic pollution in the ocean is a significant threat to marine mammals, including whales. Whales can ingest plastic, mistaking it for prey, or it can enter their digestive system from prey that has previously consumed plastic. Plastic waste can also entangle whales, causing injuries and extreme energy exertion, which can sometimes be fatal. While it is challenging to determine the exact number of whale deaths caused by plastic pollution, it is estimated that around 2 to 6 percent of whale carcasses are found on shorelines, with the majority sinking to the ocean floor. The presence of plastic in whales' stomachs can lead to starvation, inflammation, and fatal infections. The issue of plastic pollution in the ocean is a pressing concern, and it is essential to address it to protect whales and other marine life.
| Characteristics | Values |
|---|---|
| Plastic ingestion | Plastic clogs the digestive system, causing starvation. It can also block food from traveling from the stomach to the intestine, and sharp edges can puncture internal organs. |
| Entanglement | Whales can become entangled in plastic, usually in the form of fishing nets and ropes. This can cause surface injuries and extreme energy exertion, which can sometimes be lethal. |
| Pollution | Plastic can carry pollutants such as POPs, which can enter a whale's body when ingested and accumulate in their blubber. These pollutants can have toxic effects on various organs and systems. |
| Echolocation interference | Toothed whales use echolocation to find prey, but unnatural objects like plastic waste can confuse this system and be misinterpreted as food. |
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What You'll Learn
- Plastic ingestion blocking food passage from stomach to intestine, causing whales to starve
- Sharp plastic edges causing internal organ damage
- Plastic clogging whales' stomachs, preventing them from eating
- Plastic entanglement causing extreme energy exertion, leading to death
- Abandoned fishing gear, a type of plastic, entangling whales and causing them to strand
Plastic ingestion blocking food passage from stomach to intestine, causing whales to starve
Plastic ingestion is a major cause of whale deaths. Whales ingest plastic either by mistakenly consuming it while feeding on prey or by consuming prey that have previously fed on plastic. Toothed whales like sperm whales and dolphins are vulnerable to larger chunks of plastic, such as bags and nets, as they swallow larger animals.
The ingestion of plastic can block the passage of food from the stomach to the intestine, causing whales to starve. This was the case for a young cuvier beaked whale that died in the Davao Gulf of the Philippines. The whale was found to have over 88 pounds of plastic waste in its stomach, leading to starvation.
Similarly, a sperm whale was found dead on a Scottish beach with a stomach full of plastic, knotted into a lethal ball. While the exact cause of death could not be determined, the plastic likely compromised the whale's digestion and contributed to its demise.
The presence of plastic in a whale's stomach can also cause inflammation of abdominal tissues, as seen in a sperm whale that died with nearly 30 kilograms of indigestible plastic.
The impact of plastic ingestion on whales is not always immediately fatal. Even small amounts of plastic can take up valuable space in their stomachs, leading to reduced calorie intake over time. This can have cascading effects on their health and survival.
It is important to note that the whales found washed ashore may only represent a fraction of the total number of whales affected by plastic ingestion. The majority of whale carcasses may sink to the ocean floor, making it difficult to determine the exact number of whales killed by plastic pollution.
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Sharp plastic edges causing internal organ damage
Sharp plastic edges can cause internal organ damage in whales, leading to their death. This occurs when whales ingest plastic debris, mistaking it for food or prey. The sharp edges of plastic items such as bags, nets, and other waste can puncture holes in the delicate linings of their stomachs and intestines, leading to fatal internal bleeding and infection.
Whales, especially toothed whales like sperm whales and dolphins, are vulnerable to ingesting larger pieces of plastic due to their feeding habits. They use echolocation to find and capture larger prey, but this same technique can lead them to mistake plastic items for food. As they swallow these objects, the sharp edges can cause severe internal injuries.
The ingestion of plastic can also lead to starvation and dehydration in whales. The plastic waste fills their stomachs, leaving no room for actual food. Additionally, the stomach acid, unable to break down the foreign material, can wear holes through the stomach lining and into the surrounding organs. This internal damage can be slow and painful, causing the whales to suffer before eventually succumbing to their injuries.
The impact of sharp plastic edges on the internal organs of whales highlights the deadly consequences of plastic pollution in our oceans. It is crucial to address this issue through proper waste management, recycling, and a reduction in single-use plastics to protect these majestic creatures and the entire marine ecosystem.
Furthermore, the problem is not limited to whales. Sea turtles, dolphins, seals, and various fish species are also victims of plastic ingestion and entanglement. The sharp edges of ingested plastic can cause similar internal injuries in these marine animals, leading to a decline in their populations and disrupting the delicate balance of marine ecosystems.
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Plastic clogging whales' stomachs, preventing them from eating
Plastic waste in the ocean is a serious threat to whales and other marine mammals. Whales often ingest plastic waste, which can clog their stomachs and prevent them from eating, leading to starvation. In March 2019, a young Cuvier beaked whale died in the Davao Gulf of the Philippines with over 88 pounds of plastic waste in its stomach. The plastic blocked food from travelling from the whale's stomach to its intestine, causing it to starve to death. This is a common issue, as plastic can take up valuable space in a whale's stomach, leading to malnutrition and starvation over time.
Toothed whales, such as sperm whales and dolphins, are particularly vulnerable to ingesting large chunks of plastic, such as bags and nets. They use echolocation to find their prey, and unnatural objects like plastic waste can confuse this sonar and be misinterpreted as food. For example, a plastic container in murky waters may resemble a fish to a toothed whale. Additionally, deep-diving species like True's beaked whales have been found with plastic in their stomachs, indicating that plastic pollution is reaching even the remotest parts of the ocean.
Baleen whales, which include the largest whale species, are also at risk from plastic pollution. Microplastics, pieces of plastic less than 5mm in size, are of particular concern for these whales as they can ingest them along with krill or other prey while filter feeding. A study published in Royal Society Open Science reported that plastic pollution may be more dangerous to baleen whales than oil spills due to the risk of ingesting microplastics.
The impact of plastic pollution on whales is not limited to ingestion. Whales can also become physically entangled in plastic, especially fishing nets and ropes. This entanglement can cause surface injuries and require whales to expend extreme amounts of energy to move, leading to lethal exhaustion.
The presence of plastic in the oceans is a human-created problem that poses a significant threat to whales and other marine life. It is essential that we reduce our use of single-use plastics and properly dispose of plastic waste to protect these magnificent creatures and the health of our marine ecosystems.
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Plastic entanglement causing extreme energy exertion, leading to death
Marine mammals, including whales, are suffering fatal consequences due to plastic pollution in the ocean. While ingestion of plastic is a significant concern, entanglement in plastic-based fishing gear is another deadly threat. Whales can become ensnared in plastic items, such as abandoned fishing nets and ropes, which can lead to severe energy exertion and ultimately, death.
Whales, being large and powerful creatures, require an immense amount of energy to swim and move through the ocean. When entangled in plastic debris, they have to exert even more energy to travel with the added burden of dragging the entanglement along. This extra energy expenditure can be lethal, especially over extended periods or for whales that are already weakened or vulnerable.
The impact of plastic entanglement on a whale's energy levels is significant. As they struggle to move with the added drag of plastic nets or ropes, their energy reserves deplete at a much faster rate. The entanglement acts as an anchor, hindering their natural movements and causing them to work much harder to cover the same distance. This increased energy demand can lead to exhaustion and, if the whale is unable to free itself or find a way to rest, it may eventually succumb to fatigue.
The exhaustion caused by entanglement can also make whales more susceptible to other threats. A weakened whale may struggle to escape predators, increasing their risk of becoming a victim. Additionally, entanglement can cause surface injuries and make it difficult for whales to breathe, further exacerbating their energy depletion and reducing their chances of survival.
Plastic entanglement is a cruel and often slow killer. The suffering inflicted on these majestic creatures is immense, and the impact on whale populations can be devastating. While it is challenging to determine the exact number of whale deaths caused by plastic entanglement, it is clear that this issue poses a severe threat to their survival. The only way to truly address this problem is to drastically reduce the amount of plastic waste that ends up in our oceans.
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Abandoned fishing gear, a type of plastic, entangling whales and causing them to strand
Abandoned fishing gear is a significant contributor to the problem of plastic pollution in the ocean, which is having devastating effects on marine life. One of the worst impacts is the entanglement of whales, which can lead to their stranding and eventual death.
Fishing gear that is abandoned or lost at sea, known as "ghost gear", can entrap whales and other marine animals such as dolphins, seals, and sea turtles. Gillnets, crab pots, and traps are the most common types of gear that continue to "ghost fish", or entangle animals even after being cut loose from their original vessels. The problem is widespread, with whale entanglements reported off the coasts of California, Florida, Louisiana, and in the Chesapeake Bay.
Whales can become entangled in both active and abandoned fishing gear. However, the issue of abandoned gear is particularly concerning as it continues to pose a threat to whales and other marine life long after it has been discarded. An estimated 640,000 tonnes of the 8 million tonnes of plastic that enter the oceans each year are abandoned fishing equipment. This equipment can entangle whales, causing them to strand and, in some cases, leading to their death.
Whales that become entangled in abandoned fishing gear can suffer from severe injuries and exhaustion. The gear can cut deep into their skin, leaving them vulnerable to deadly infections. Additionally, the extreme energy exertion required to travel with the burden of debris can sometimes be lethal.
The impact of abandoned fishing gear on whales is not limited to physical entanglement. When whales ingest plastic, it can cause inflammation of their abdominal tissues, leading to death. Abandoned fishing gear can break down into microplastics, which whales may inadvertently swallow while feeding. These microplastics can also attract chemicals known as persistent organic pollutants (POPs), which can be toxic to whales.
The problem of abandoned fishing gear is a human-created one, and it is up to humans to find solutions. Efforts are being made to address this issue, such as the implementation of the Whale Protection & Crab Gear Retrieval Act in California, which aims to reduce the number of whales caught in fishing gear by providing financial incentives for fishermen to collect abandoned gear.
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Frequently asked questions
Whales can die from ingesting plastic, which can block food from travelling from their stomach to their intestine, causing them to starve. Plastic can also poke holes in their internal organs.
Toothed whales and dolphins use echolocation to find their prey. Some scientists believe that unnatural objects such as plastic waste confuse this echolocation and are incorrectly interpreted as food.
Whales are vulnerable to larger chunks of plastic, such as bags and nets. Microplastics, or plastic pieces of 5mm or less, are also of particular concern, as whales can ingest them along with krill or other prey while filter feeding.
In addition to internal injuries, whales can suffer from extreme energy exertion needed to travel with the burden of debris dragging behind them, and these effects can sometimes be lethal.
It is difficult to know exactly how many whales are killed by plastic pollution. However, it has been estimated that around the Gulf of Mexico, 2 to 6 percent of whale carcasses end up on a shoreline, meaning that the vast majority sink to the ocean floor. This is likely the case for most of the world’s waters.
