A baleen whale of the order Cetacea and family Baleen whale. It was also called the pied whale, but this name is rarely used in recent years because it is easily mistaken for a small sei whale. It has a spindle-shaped body and is the smallest species in the Baleen whale family, with a pointed beak. Its back is black and its ventral side is white, with a distinctive pattern in between. It has a white band on its pectoral fin, but this is not as clear in the closely related Antarctic minke whale B. bonaerensis , which lives in the Southern Hemisphere. Its baleen is yellowish-white, and the Antarctic minke whale has a black band on the outside. It reaches a birth length of 2.7 meters, and the average adult body length is 8 to 9 meters, depending on the lineage and sex, and it weighs about 6 tons. It is widely distributed from ice-covered seas to tropical seas, and this species can also be found in small attached seas. In the Antarctic, minke whales also invade pack ice. They feed mainly on krill, and also like to eat schooling fish. They have long been a target of whaling around the world, but commercial whaling has been prohibited since 1986 by the International Whaling Commission (IWC). Resources are abundant, with over 760,000 minke whales alone. There are 32,000 minke whales living in the North Pacific and 200,000 in the North Atlantic. [Seiji Osumi] [References] | |© Yoshikazu Natsume "> Major types of whales (1) [specimen illustrations] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
哺乳(ほにゅう)綱クジラ目ナガスクジラ科のヒゲクジラ。コイワシクジラともよばれたが、小さいイワシクジラと誤解されやすいので、近年ではこの名はほとんど使われない。体は紡錘形で、ナガスクジラ科のなかの最小種であり、くちばしがとがっている。背側が黒く、腹側が白いが、中間に特徴ある模様がみられる。胸びれに白帯があるが、南半球産の近縁種クロミンククジラB. bonaerensisではそれが明瞭(めいりょう)でない。くじらひげは黄白色で、クロミンククジラでは外側に黒帯がみられる。出生体長は2.7メートルで、成体の平均体長は系統と性によって差があるが、8~9メートルであり、その体重は約6トンである。氷海から熱帯の海まで広く分布し、小さな付属海にもこの種がみられる。クロミンククジラは南極ではパックアイス(流氷)の中にも侵入する。オキアミ類を主食とし、群集性魚類も好んで食べる。古くから世界の捕鯨の対象となっていたが、1986年以来国際捕鯨委員会(IWC)によって商業捕鯨による捕獲が禁止されている。資源量は豊富で、クロミンククジラだけでも76万頭以上が生息する。ミンククジラは北太平洋で3万2000頭、北大西洋で20万頭が生息する。 [大隅清治] [参照項目] | |©夏目義一"> クジラのおもな種類(1)〔標本画〕 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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