Animal Diversity Web U of M Museum of Zoology ADW Home ADW Home ADW Home University of Michigan Help About Aninal Names Teaching Special Topics About Us




Structured Inquiry Search — preview

Home -> Kingdom Animalia -> Phylum Chordata -> Subphylum Vertebrata -> Class Mammalia -> Order Cetacea -> Suborder Mysticeti -> Family Balaenopteridae -> Species Balaenoptera edeni

Balaenoptera edeni
Bryde's whale



2008/10/12 02:27:05.661 GMT-4

By Elizabeth Gill

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Mammalia
Order: Cetacea
Suborder: Mysticeti
Family: Balaenopteridae
Genus: Balaenoptera
Species: Balaenoptera edeni

Geographic Range

Bryde's whale is found throughout the world, primarily in warm temperate and sub-tropical waters.

Biogeographic Regions:
ethiopian (native ); neotropical (native ); indian ocean (native ); atlantic ocean (native ); pacific ocean (native ).

Habitat

Populations exist mainly in warmer waters (~20 degrees Celcius). More research needs to be done on this topic.

Aquatic Biomes:
coastal .

Physical Description

Mass
12000 to 20000 kg; avg. 16000 kg
(26400 to 44000 lbs; avg. 35200 lbs)


Bryde's whales are dark gray in color with a yellowish white underside. They are the second smallest rorqual with an average length of 12 meters, although the female is usually about 1 foot longer than the male. Bryde's whales have two blowholes located on the top of the head. Bryde's whale is often confused with the Sei whale; however, the Bryde's whale has three parallel ridges in the area between the blowholes and the tip of the head. The flippers are small compared to body size. The prominent dorsal fin is sickle shaped. Instead of teeth, these whales have two rows of baleen plates. These plates are located on the top jaw and number approximately 300 on each side. Each baleen plate is short and wide, 50cm x 19cm.

Some key physical features:
endothermic ; bilateral symmetry .

Reproduction

Breeding season
Breeding occurs year round in Bryde's whales

Number of offspring
1 (average)

Gestation period
12 months (average)

Birth Mass
1000000 g (average)
(35200 oz)
[External Source: AnAge]


Age at sexual or reproductive maturity (female)
8 years (average)

Age at sexual or reproductive maturity (male)
10 years (average)

Breeding occurs year round in Bryde's whales. Sexual maturity is reached at 10 years of age for males and 8 years of age for females. The gestation period is approximately 12 months. Most Bryde's whales bear 1 calf. Calves are around 4 meters at birth and weigh 1 ton.

Key reproductive features:
iteroparous ; year-round breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; viviparous .

Behavior

Bryde's whales are seldom seen in large groups but will congregate around dense populations of food. They are deep divers. The lobes of either side of the tail (flukes) are seldom shown. Swimming speed ranges between 4 - 16 knots. Some tropical populations are possibly sedentary with short distance migrations. More research needs to be done on the behavior of Bryde's whales.

Key behaviors:
natatorial ; motile ; migratory ; sedentary ; social .

Food Habits

Bryde's whales feed almost exclusively on pelagic fish (pilchard, mackerel, herring, and anchovies) and pelagic crustaceans (shrimp,crabs, and lobsters). They also have been observed to eat cephalopods (octopus, squid, and cuttlefish).

Primary Diet:
carnivore (piscivore , eats non-insect arthropods).

Animal Foods:
fish; mollusks; aquatic crustaceans.

Foraging Behaviors:
filter-feeding .

Conservation Status

IUCN Red List: [link]:
Data Deficient.

CITES: [link]:
Appendix I.

Some populations were seriously depleted as a result of whaling practices. Bryde's whales are not on the Endangered species list. As a result of the 1986 Moratorium on Whaling, they are protected worldwide.

Contributors

Elizabeth Gill (author), University of Michigan.
Phil Myers (editor), Museum of Zoology, University of Michigan.

References

"Discovering Whales- The Bryde's Whale" (On-line). Accessed October 11,1999 at http://whales.magna.com.au/DISCOVER/BRYDES/brydesg.html/.

"CINMS Bryde's Whale Page" (On-line). Accessed October 15, 1999 at http://cinms.nos.noaa.gov/animals/bryde.stm.

8/1/97. "Bryde's Whale: Eastern Tropical Pacific Stock" (On-line). Accessed October 11,1999 at http://swfsc.ucsd.edu/sars/Brydes_w.htm.

December 1974. International Whaling Commission, Scientific Committee on Sei and Bryde's Whales.. Cambridge.

Anderson, 1994. "The Mammals of Texas - Online Edition" (On-line). Accessed October 11,1999 at http://www.nsrl.ttu.edu/tmot/balaeden.htm.

2008/10/12 02:27:10.259 GMT-4

To cite this page: Gill, E. 2000. "Balaenoptera edeni" (On-line), Animal Diversity Web. Accessed October 13, 2008 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Balaenoptera_edeni.html.

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

Other formats: OWL

Home  ¦  About Us  ¦  Special Topics  ¦  Teaching  ¦  About Animal Names  ¦  Help

Structured Inquiry Search — preview