Monday, July 30, 2007

Fin whale fact sheet


Fin whales are the second largest animals in the world. Their most distinguishing feature is the asymmetrical markings on the head: on the right side the lower lip, mouth cavity, and baleen plates are white, whereas on the left these features are dark. The dorsal fin is smaller and more falcate than that of the sei whale, and they have only one ridge on the head, unlike the Bryde's whale which has three. Fin whales are among the fastest of the whales, reaching speeds up to 47 km/hr and because of this they have gained the nickname "greyhounds of the sea".


Fin whales have a wide global distribution. While many populations are thought to be migratory, resident populations also exist. In the Azores migratory fin whales are seen primarily during the spring months (as early as January, both normally between March until June). Fin whale can be seen any month of the year but this doesn't happen every year. They are usually encountered alone or in small groups and often follow the same path. Sometimes we can observe feeding behaviour as they pass by the Azores. Between May 2006 and December 2015 we registered 363 fin whale encounters on the sea. Throughout the years we can see that we encounter more and more fin whales, but this species is endangered. 

Fin whales are part of our research of photo identification and at the moment (2015) we have 44 individuals in our catalogue. We use the dorsal fin as a primary mark but also the chevrons/shades on the body. Interesting fact about fin whales is that the shape of the dorsal fin can vary a lot between individuals and can sometimes be confused with other whales such as sei whales.


Length: 
• Male: 25 m
• Female: 27 m
• Calf:  6 – 7 m

Weight: 

• Female: 120,000 kg
• Calf:  2,000 – 3,000 kg

Global population:  c.33,000 (population trend unknown)


Status: Endangered

Diet: Small invertebrates (euphausiids and copepods), fish (herring, mackerel, sandlance), squid


Baleen: 260 – 480 pairs


Longevity: Oldest captured was 111 years


Breeding age: Female: 3 – 12 years


Gestation: : 11 – 12 months


Nursing: At least 6 months 



In other languages
Portuguese: Baleia-comum
Spanish: Ballena fin
French: Roqual Commun
Italian: Balenottera comune
German: Finnwal
Dutch: Gewone vinvis
Swedish: Sillval, vanlig fenval
Sami: Reider
Norwegian: Finnhval
Danish: Finhval
Finnish: Sillivalas
Polish: Pletwal blekitny 
Russian: Finval, nastoiashchiy polosatik









Mother and calf




Pec-fin wave


Fin whale just behind the boat, beautiful blow


 


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