🐬Irrawaddy dolphin
Iravadindelfiini eli kaakkoisaasiandelfiini (Orcaella brevirostris) on harvinainen delfiinilaji, joka elää Etelä-Aasian rannikoilla ja jokisuissa. Nisäkäsnimistötoimikunnan ehdotus lajin uudeksi suomenkieliseksi nimeksi on australiandelfiini. Lajia tavataan niin harvoin ettei sen lukumääristä ole tarkkaa tietoa, mutta sitä pidetään todennäköisesti varsin uhanalaisena. Iravadindelfiinin levinneisyysalue on laaja mutta pirstaleinen, ja patojen rakennus sekä pyydystys eläintarhoihin on lisännyt lajin katoamisen uhkaa. Iravadindelfiini vaeltaa 7–10 yksilön laumoina, mutta niitä nähdään myös pareina tai kolmikkoina. Ne uiskentelevat hitaasti, paitsi silloin kun ne syöksyvät saaliin perään. Iravadindelfiini poikkeaa muista delfiineistä muotonsa takia: sen pää on pyöreä, eikä sillä ole ulkonevaa nokkaa. Se kasvaa 200–275 cm pitkäksi ja painaa 90–200 kg. Iravadindelfiinit synnyttävät tyypillisesti poikasen joka toinen vuosi.
Text: Wikipedia, CC BY-SA 4.0.
IUCN Red List assessment, 2017.
- Body mass
- 190 kg
- Body length
- 2.63 m
- Shoulder height
- not recorded
- Top speed
- not recorded
- Bite force
- not recorded
- Maximum lifespan
- 30 years
Everything we know about the Irrawaddy dolphin
Typical adult figures. Where a value is an estimate rather than a measurement, it says so.
Body mass190 kgCOMBINEOther figures ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Figures vary
- 190 kgAnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Body length2.63 mCOMBINEOther figures ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Figures vary
- 2.75 mSeaLifeBasev25.04
Maximum lifespan30 yearsCOMBINEOther figures ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Figures vary
- 30 yearsAnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Generation length15 yearsCOMBINEDetails ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Age at maturity5.0 yearsCOMBINEDetails ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Gestation1.2 yearsCOMBINEOther figures ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Figures vary
- 1.2 yearsAnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Litter size1COMBINEOther figures ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Figures vary
- 1AnAgeAnAge build 15, 2023-07-03 (HAGR)data quality: acceptable
Trophic levelCarnivoreCOMBINEDetails ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Activity cycleCrepuscular / mixedestimatedCOMBINEDetails ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Population density37 per km²COMBINEDetails ↓Hide ↑
Source: COMBINE · v1 (Soria et al. 2021) · CC BY 4.0
Volume l190 LaverageDetails ↓Hide ↑
Body mass at ~1.0 kg/L, the density of vertebrate tissue.
estimated = a model's estimate for a species nobody has measured; average = a mean across sexes or species in a group.
Not recorded for Irrawaddy dolphin yet: shoulder height, top speed, bite force.
Family tree
- kingdomAnimalia
- ›phylumChordata
- ›classMammalia
- ›orderCetacea
- ›familyDelphinidae
- ›genusOrcaella
- ›speciesOrcaella brevirostris
- classMammals · Mammalia
- orderEven-toed hoofed animals · Artiodactyla
- infraorderWhales & dolphins · Cetacea
- genusOrcaella
All 15 branches ↓Fewer branches ↑
- kingdomMetazoa
- phylumChordata
- subphylumCraniata
- subphylumVertebrata
- superclassGnathostomata
- superclassSarcopterygii
- superclassTetrapoda
- classMammals · Mammalia
- subclassTheria
- superorderLaurasiatheria
- orderEven-toed hoofed animals · Artiodactyla
- suborderWhippomorpha
- infraorderWhales & dolphins · Cetacea
- familyDelphinidae
- genusOrcaella
More about the Irrawaddy dolphin
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