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White-beaked dolphins feed predominantly on gadoid fishes, particularly cod, haddock, and whiting. [ 12 ] [ 13 ] They are social animals , most commonly found in groups of less than ten, [ 6 ] but sometimes in much larger associations of over a hundred individuals. [ 14 ]
A common bottlenose dolphin (Tursiops truncatus). A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale).Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).
Dolphins have evolved electroreception in structures different from those of fish, amphibians and monotremes. The hairless vibrissal crypts on the rostrum of the Guiana dolphin (Sotalia guianensis), originally associated with mammalian whiskers, are capable of electroreception as low as 4.8 μV/cm, sufficient to detect small fish. This is ...
Coralling is a method where dolphins chase fish into shallow water to catch them more easily. [63] Orcas and bottlenose dolphins have also been known to drive their prey onto a beach to feed on it, a behaviour known as beach or strand feeding. [64] [65] The shape of the snout may correlate with tooth number and thus feeding mechanisms.
Atlantic white-sided dolphins jump and breach more frequently when in larger groups, as this behaviour might have a social context. [16] They have a wide vocal repertoire which includes squeals, whistles, clicks and buzzes. [17] [20] It is suggested that vocalisation is used for communication as noise production increases during socialising. [20]
The bottlenose dolphin is a toothed whale in the genus Tursiops.They are common, cosmopolitan members of the family Delphinidae, the family of oceanic dolphins. [3] Molecular studies show the genus contains three species: the common bottlenose dolphin (Tursiops truncatus), the Indo-Pacific bottlenose dolphin (Tursiops aduncus), and Tamanend's bottlenose dolphin (Tursiops erebennus).
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Male Amazon river dolphins have been observed to exhibit an unusual aerial urination behavior, predominantly in social contexts involving other males. During these events, a urinating male positions itself upside down, ejecting a urine stream into the air, while a receiving male actively seeks the stream with its rostrum , possibly detecting ...