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The '''Black Sea harbour porpoise''' ('''''Phocoena phocoena relicta''''') is a ] of the ] common in the ], ], Marble, and ] Seas. It is the only representative of the family in the fauna of these areas and is considered a narrow-range ] subspecies. This ] is often called the "guinea pig" because of its up to four centimetres thick layer of ] and noisy breathing, similar to "grunting." The '''Black Sea harbour porpoise''' ('''''Phocoena phocoena relicta''''') is a ] of the ] common in the ], ], ], and ] Seas. It is the only representative of the family in the fauna of these areas and is considered a narrow-range ] subspecies. This ] is often called the "]" because of its up to four centimetres thick layer of ] and noisy breathing, similar to "grunting."


==Biology== ==Biology==
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Latest revision as of 01:19, 16 January 2025

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Find sources: "Black Sea harbour porpoise" – news · newspapers · books · scholar · JSTOR (January 2025)
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The Black Sea harbour porpoise (Phocoena phocoena relicta) is a subspecies of the harbour porpoise common in the Azov, Black, Marmara, and Aegean Seas. It is the only representative of the family in the fauna of these areas and is considered a narrow-range relict subspecies. This dolphin is often called the "guinea pig" because of its up to four centimetres thick layer of subcutaneous fat and noisy breathing, similar to "grunting."

Biology

Adults are usually 1.3–1.5 metres long and weigh around 30 kg. Females are slightly larger than males, which is not typical for other dolphins. It has a short head with a rounded blurred face, making it look different than other dolphins. The low dorsal fin has a triangular shape with a wide base, while its pectoral fins have rounded ends. The back of its body is dark grey, sometimes almost black, and its abdomen is light. Females reach adulthood in 4 years and reproduce in late spring or early summer. Pregnancy lasts 9–11 months. Females birth one cub, which is born with its tail in front and must immediately rise to the surface for its first breath. This subspecies faces threats from marine traffic.

References

  1. "Akkaya Bas A, Christiansen F, Amaha Öztürk A, Öztürk B, McIntosh C (2017) The effects of marine traffic on the behaviour of Black Sea harbour porpoises (Phocoena phocoena relicta) within the Istanbul Strait, Turkey. PLoS ONE 12(3): e0172970". journals.plos.org. Retrieved 15 January 2025.
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