rorqual

(redirected from Rorquals)
Also found in: Dictionary, Thesaurus.
Related to Rorquals: sei whale, Balaenopteridae, Minke Whales

rorqual:

see whalewhale,
aquatic mammal of the order Cetacea, found in all oceans of the world. Members of this order vary greatly in size and include the largest animals that have ever lived. Cetaceans never leave the water, even to give birth.
..... Click the link for more information.
.

Rorqual

 

(Balaenoptera physalus), also finback, a marine mammal of the family Balaenopteridae of the suborder Mystacoceti (whalebone, or baleen, whales). The body length is 19–20 m; males are 1 m shorter than females. Some individuals reach a length of 27.3 m. The body is dark-gray above and white below; the right side of the head is lighter than the left. The whalebone plates are gray-blue and are found in rows of about 360. There are 70 to 90 stripes on the belly. The rorqual is found from the arctic to the antarctic; in the USSR it occurs in the seas of the Far East and, very rarely, in the Barents and White seas. The whale enters areas with thinning ice. The young, which are born in moderately warm waters, are about 6–7 m long. Rorquals feed on planktonic crustaceans, schooling fishes, and cephalopod mollusks. They are commercially hunted, and their number is decreasing.

REFERENCES

Tomilin, A. G. Kitoobraznye. (Zveri SSSR i prilezhashchikh stran, vol. 9). Moscow, 1951.
Zhizn’ zhivotnykh, vol. 6. Moscow, 1971.

rorqual

any of several whalebone whales of the genus Balaenoptera, esp B. physalus: family Balaenopteridae. They have a dorsal fin and a series of grooves along the throat and chest
References in periodicals archive ?
3 individuals and are highest for the small delphinids and lowest for the rorquals and beaked whales.
Wade and Gerrodette, 1993) to assign the abundance of unidentified rorquals and beaked whales to species.
If these characteristics were not identified or seen, the whale was classified as a non-identified (NI) rorqual.
For what it is worth, the rorquals appear to have survived-although, in the case of the blues, just barely-a much more savage assault in the twentieth century than that to which the baleens hunted by the Americans were subjected in the nineteenth.
As Webb (2001:286) concluded, whaling "merely served as a stopgap while awaiting the fish, and was quickly abandoned when they returned" In September 1887, one of the Boothbay oil factories that had processed many of the whales taken by the steamers changed hands (Register, 1887), and the evidence overall suggests that there was a sharp decline in the numbers of rorquals taken after 1886 (Table 3).
Within each popu-lation, especially among the rorquals, the oldest animals and pregnant females are the first to emigrate towards warmer waters, while the immature calves are the last.
If probable species identifications were not available, species were classified as unidentified delphinoids, small whales, beaked whales, rorqual whales, or large whales.
During the summer, the Antarctic waters are invaded by many predators, such as the rorquals (Balaenoptera), sperm whales (Physeter macrocephalus), killer whales (Orcinus), and large numbers of birds and seals.
In contrast to humpback whales, no other large rorquals (blue, fin, or sei whales) were observed during any of our ship or small boat surveys.
Japan, which already takes 440 minke whales per year, recently announced that it proposes to extend this programme to include 10 sperm whales and 50 other rorquals per year, though both species are protected under American law.
Giant squids are invertebrates and there are clearly bones visible (jaw, skull, vertebrate) so I am very comfortable saying it's some type of rorqual whale," Regina Asmutis-Silvia, executive director of Whale and Dolphin Conversation, told the (http://www.
We observed a total of 12 dolphin species, three rorqual species, two ziphiid species, and one Kogia species.