fish dolphins

fish dolphins

Unlike other aquatic mammals that dolphins and whales that live in the sea, dolphins (Orcaella brevirostris) live in rivers in the tropics. Population of endangered species protected by the Act which is only found in three locations in the world of the Mahakam River, the Mekong River, and River Irawady.

Formerly dolphins had been found in many estuaries in Borneo, but now dolphins become endangered species. Except in the Mahakam river, in this place Pesut Mahakam habitat can be found hundreds of miles of ocean that is in the district town Wake up, Kutai district, East Kalimantan. Habitat for predators of freshwater fish and shrimp can be found in the waters of the Mahakam River, the lake Jempang (15,000 ha), lake Semayang (13,000 ha) and Across the lake (11.000Ha).

Dolphins have a round shaped head (like bulbs) with both eyes are small (perhaps an adaptation to the muddy water). Pesut body is gray to wulung older, paler at the bottom - there is no typical pattern. Small dorsal fin and rounded behind the middle of his back. High forehead and rounded, no beak. Width of pectoral fin rounded.

Dolphins move in small herds. Although his views are not so sharp and the fact that dolphins live in water containing mud, but dolphins is an 'expert' in detecting and avoiding obstacles. Perhaps they used to perform ultrasonic echo location as that of relatives in the sea.

These animal populations continue to shrink due to disturbed habitats, especially the increasingly busy traffic Mahakam river waters, and high levels of erosion and siltation of rivers due to the surrounding forest management. Sustainability Pesut Mahakam also expected to be at risk from lack of food in the form of shrimp and fish, because it must compete with fishermen along the Mahakam River.