<form id="ddhxn"><nobr id="ddhxn"><nobr id="ddhxn"></nobr></nobr></form>

                Peale's Dolphin

                Peale's Dolphin

                Black-chinned dolphin, Peale's black-chinned dolphin, Peale’s Porpoise and Southern white-sided dolphin

                Kingdom
                Phylum
                Subphylum
                Class
                Order
                Infraorder
                Family
                SPECIES
                Lagenorhynchus australis
                Population size
                Unknown
                Life Span
                13 yrs
                WEIGHT
                115 kg
                LENGTH
                2 m

                Peale’s dolphins are small to medium sized dolphins that live in the sea around Tierra del Fuego, South America. Adults are black to dark gray, with lighter shading on their flanks. They are coastal dolphins and can often be seen swimming near the coastline in groups and hunting for prey. The oldest Peale’s dolphin recorded in the wild was the age of 13.

                Distribution

                Peale’s dolphin occurs only near the southernmost tip of South America and off Santiago, Chile, and northern Argentina. It is commonly seen near the Falkland Islands (Malvinas) and at Burdwood Bank, south of the Falklands. Sightings have been reported in the South Pacific around Palmerston Atoll, but this is outside the usual range and possibly represents a new, undescribed species. These dolphins inhabit open coastal waters above shallow continental shelves, bays, inlets, channels, near islands and in fjord openings. Although found as deep as 300 meters, they prefer shallower coastal waters, particularly associated with beds of kelp.

                Peale's Dolphin habitat map

                Geography

                Continents
                Countries

                Climate zones

                Habits and Lifestyle

                Peale’s dolphins are gregarious, swimming in groups from 2 to 13 individuals, with most sightings being of groups that have 2 to 4 members. Groups with as many as 100 members have been seen, more often during January and February. The larger groups tend to divide up into sub-groups. The Peale’s dolphin surfaces three to four times every minute and dives for one to 130 seconds, with the average dive being less than 60 seconds. They display many different kinds of behavior. While swimming they can be seen jumping, spinning, humping and tailslapping, the latter being thought to aid foraging by sending fish towards other dolphins.

                Group name
                Lifestyle

                Diet and Nutrition

                This species is carnivore (piscivore and molluscivore). The diet of Peale’s dolphin includes: Argentine shrimp, squid, Argentine hake, Kingklip fish, southern cod, hagfish, red octopus Pantagonian grenadier, herring, mackerel, anchovies, capelin, crustaceans and whelks (gastropods).

                Mating Habits

                REPRODUCTION SEASON
                between the southern hemisphere’s spring and autumn but can be as early as October
                PREGNANCY DURATION
                10-12 months
                BABY CARRYING
                1 calf
                INDEPENDENT AGE
                24 months
                FEMALE NAME
                cow
                MALE NAME
                bull
                BABY NAME
                calf

                Not much is known about the Peale’s dolphin’s mating behavior or its biology, as it is seldom found stranded. Births are usually between the southern hemisphere’s spring and autumn but can be as early as October. Usually for species within the same genus (Lagenorynchus) the gestation period is ten to twelve months, with females bearing one calf at a time. The mother nurses her calf for about 18 months, although it may remain dependent for a further 6 months. It is unknown at what age these animals reach reproductive maturity.

                Population

                Population threats

                Since the 1970s these dolphins have been heavily exploited for crab bait. This practice still takes place in Chile, although less often than previously. They also sometimes drown in gillnets, and a small number are caught in the anti-predator nets near salmon pens in Chile. Further threats include organochlorine pollution, as well as threats to the forests of kelp on which they depend.

                Population number

                According to IUCN, Peale’s dolphin is the most common cetacean throughout its range but no overall population estimate is available. Currently this species is classified as Data Deficient on the IUCN Red List.

                Ecological niche

                Not much known about Peale’s dolphin’s effect on the oceanic ecosystem. However, they may affect predator populations, as items of prey.

                Fun Facts for Kids

                • Peale’s dolphins can be mistaken for dusky dolphins in much of their range.
                • Peale’s dolphins will often follow in a boat’s wake, but turning off the propeller seems to lead to loss of interest.
                • These dolphins are often observed associating with other species of dolphin, particularly Commerson’s dolphin.
                • In Spanish Peale’s dolphin was previously called llampa or in Chile, tunina. Now it is known as delfin austral or Southern dolphin in both Chile and Argentina.
                • In groups, Peale’s dolphin generally engages in what is called “starburst” or "flower" feeding, encircling prey and forming a large group to then feast. This is done mostly within the kelp beds.

                References

                1. Peale's Dolphin Wikipedia article - https://en.wikipedia.org/wiki/Peale%27s_dolphin
                2. Peale's Dolphin on The IUCN Red List site - http://www.iucnredlist.org/details/11143/0

                More Fascinating Animals to Learn About

                白小姐一肖一码准选一码