. Oestrus Sept- Dec. Dioestrus after the first sexual season Pre^nancu Sep|-Au^ Dec- Nov , , . Sept- Dec _actdtion to ^^ Dec-Feb Anoestrus to Usept Feb ' Fig. 58. Humpback whale. Diagram of oestrous cycle. u- • •t • • ^ 12- QJ .•>?..•*.• . •:« • t) II- . - . • • E ^^* •.. • c 10- JZ •• ^ 3- • •• c • ^ 8- 13 • f° 7^ f;-H • b^ Nov Dec Jan Feb Mar Apr MaLj Jun Jul Aug Sep Fig. 59. Humpback whale. Lengths and dates of immature whales. agrees with this conclusion: speaking'of the^Humpbacks arriving off the coast of South Africa on their northward migration, he says that they are often accompanie
. Oestrus Sept- Dec. Dioestrus after the first sexual season Pre^nancu Sep|-Au^ Dec- Nov , , . Sept- Dec _actdtion to ^^ Dec-Feb Anoestrus to Usept Feb ' Fig. 58. Humpback whale. Diagram of oestrous cycle. u- • •t • • ^ 12- QJ .•>?..•*.• . •:« • t) II- . - . • • E ^^* •.. • c 10- JZ •• ^ 3- • •• c • ^ 8- 13 • f° 7^ f;-H • b^ Nov Dec Jan Feb Mar Apr MaLj Jun Jul Aug Sep Fig. 59. Humpback whale. Lengths and dates of immature whales. agrees with this conclusion: speaking'of the^Humpbacks arriving off the coast of South Africa on their northward migration, he says that they are often accompanied by calves of the previous year about 30 ft. (9-15 m.) long, and he further states that between the north and south migrations nearly all the Humpbacks caught at Durban are 30-35 or 40 ft. (9-15-10-67 or 12-2 m.) long and are sexually immature individuals one to two years old.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
