The forehead of a dolphin is a lump of fatty tissue called the melon. However, it is estimated that up to 1,500 of these animals are drowned every year by becoming tangled in gillnets and other fishing gear. The franciscana is a small dolphin with a very long, slender beak – in fact they hold the record for the longest beak in proportion to body size, of any dolphin. The calves when born are very small approximately only 70-75cm in length compared to bottlenose dolphins which are usually around 115cm. These organisms can be plants or animals. Abundance estimates indicate that the population in Argentina is around 15,000 individuals, that from Rio Grande do Sul is around 6800, while the one in northern Rio de Janeiro is less than 2000 dolphins. Other names: La Plata River dolphin; Delfin del Plata, Toninha, Cachimbo, Boto Amarelo Echolocation is a sensory system in which dolphins make sounds that seem to be focused through the melon and then sent out into the environment. This movement does not seem to happen off the coast of Brazil, where water temperatures remain more constant throughout the year. Franciscana (Pontoporia blainvillei) is also known as the La Plata River dolphin.In Uruguay and Argentina it is called franciscana, whereas in Brazil it is called toninha or cachimbo.Although both this species and the Yangtze river dolphin, Lipotes vexillifer, were until recently regarded as of the family Pontoporiidae, the franciscana is now the sole member of this family. Encouraging the implementation of the National Action Plan to reduce the interactions of marine mammals with fisheries in Argentina. https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/franciscana-dolphin-pontoporiidae, "Franciscana Dolphin: Pontoporiidae Their distribution within this range is uneven. Water scavenger beetles…, Franciscan University of Steubenville: Tabular Data, Franciscan University of Steubenville: Narrative Description, Franciscan University of Steubenville: Distance Learning Programs, Francisco de Paula Joséde Goya y Lucientes, Francisco, Don: 1940—: Television Show Host, http://www.press.jhu.edu/books/walkers_mammals_of_the_world/cetacea/cetacea.pontoporiidae.pontoporia.html, https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/franciscana-dolphin-pontoporiidae. Your contribution will directly support the collaborative enhancement of stranding response methods, including standardized stranded dolphin protocols and rehabilitation procedures to inform overall rehabilitation success and ultimately increase survivability. Based on the distribution of sightings and catches, the franciscana lives in a narrow strip of coastal waters beyond the surf to the 30-m isobath. Franciscanas prefer waters beyond the surf zone up to 50m deep in some areas and only up to 35m deep in others. The closest living relative to the franciscana is the Amazon River dolphin (boto) a freshwater dolphin found in the Amazon and Orinoco river basins of South America. Grzimek's Student Animal Life Resource. This family is part of the Scombroidea, a subfamily of marine fis…, dogfish, name for a number of small sharks of several different families. Click here to read about a research programme, supported by the IWC Small Cetaceans Voluntary Fund, which is working to improve abundance estimates for Franciscana, in order to guide conservation actions. Franciscanas live only in the shallow, coastal waters of the southwestern Atlantic of Brazil, Uruguay, and Argentina. They will swim Both sharks and orcas prey on franciscanas but the biggest threat they face by far is from human fishing activities. Franciscana dolphins are gray-brown on their back and lighter underneath. By supporting WDC, you can help franciscanas to live safe and free.

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