Ukrainian Antarctic journal

No 10-11 (2012): Ukrainian Antarctic Journal
Articles

Dwarf whale Caperea marginata Gray, 1846 of the South Atlantic

Yu. A. Mikhalev
South Ukrainian National Pedagogical University after K. D. Ushynsky, Odesa
G. A. Budilenko
South Ukrainian National Pedagogical University after K. D. Ushynsky, Odesa
Published December 31, 2012
Keywords
  • South-East Atlantic,
  • pygmy whale,
  • skeleton,
  • reproductive biology,
  • population

Abstract

Information about a unique form – dwarf whale Caperea marginata, from the open waters of the South Atlantic, is provided. Hydrobiological characteristics of the area is given. Size, gender and biological state of caught whales, the weight of  internal organs, fullness and stomach content (Calanus tonsus, Calanus  simillimus) are specified. The behavior of whales, morphological features, body proportions, and standard measurements, the structure of the baleen system, particularities of skeleton are described. Formula of the spine is determined as S7D17L3Ca13 or S7D18L2Ca13. Allometric relationship between body length and number of vertebrae in the spine for different species of whales is established. Based on the size of females, analysis of ovaries and embryos, the average length of newborns (about 220 cm), and duration of pregnancy of females (about 11 months) are calculated. Wider habitat (using data for open water) and greater than assumed earlier populations of pygmy whales are concluded.