Harp seal

The harp seal or saddleback seal (Pagophilus groenlandicus) is a species of earless seal native to the northernmost Atlantic Ocean and parts of the Arctic Ocean. It now belongs to the monotypic genus Pagophilus. Its scientific name means "ice-lover from Greenland", and its synonym, Phoca groenlandica means "Greenland seal". Originally in the genus Phoca with a number of other species, it has since been reclassified into its own genus Pagophilus.

Description

The harp seal has a silvery-gray body. Its eyes are pure black. It has black harp or wishbone-shaped markings on the back. The baby harp seal (pup) has a yellow-white coat at birth, but after three days, the coat turns white and stays white for about 12 days. Adult harp seals grow up to be 1.7 to 2.0 m (5 ft 7 in to 6 ft 7 in) long and weigh from 140 to 190 kg (310 to 420 lb).

Physiology

Thermoregulation

Harp seals combine anatomical and behavioural approaches to managing their body temperatures, instead of elevating their metabolic rate and energy requirements. A thick coat of blubber insulates its body and provides energy when food is scarce or during fasting. Blubber also streamlines its body for more efficient swimming. Brown fat warms blood as it returns from the body surface as well as providing energy, most importantly for just-weaned pups.

Harp

The harp is a stringed musical instrument which has a number of individual strings running at an angle to its soundboard, which are plucked with the fingers. Harps have been known since antiquity in Asia, Africa, and Europe, dating back at least as early as 3500 BCE. The instrument had great popularity in Europe during the Middle Ages and Renaissance, where it evolved into a wide variety of variants with new technologies, and was disseminated to Europe's colonies, finding particular popularity in Latin America. While some ancient members of the harp family died out in the Near East and South Asia, descendants of early harps are still played in Burma and in Sub-Saharan Africa, while other defunct variants in Europe and Asia have been revived by musicians in the modern era.

Harps vary globally in many ways. In terms of size, many smaller harps can be played on the lap, while larger harps are quite heavy and rest on the floor. Different harps may use strings of catgut or nylon, or of metal, or some combination. While all harps have a neck, resonator, and strings, "frame harps" have a pillar at their long end to support the strings, while "open harps", such as arch or bow harps, do not. Modern harps also vary in techniques used to extend the range and chromaticity of the strings, such as adjusting a string's note mid-performance with levers or pedals which modify the pitch.

Seal

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