In combination with a range of other factors, the species may be moving even closer to extinction, the experts noted. The researchers emphasised that their work clearly shows that all types of entanglement in fishing gear affect the ability of female northern right whales to give birth to calves.
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It is noted that entanglement in fishing gear, such as nets and ropes, is a serious threat to the species and carries a risk of injury, infection and even death. The problem is exacerbated by the fact that northern right whales feed in areas where fishing activities are common. Experts emphasise that the deterioration of the ability to give birth to calves is one of the key factors in the decline of northern smooth whales, but until now it was unknown what caused it.
