However, the finless porpoise and the harbour porpoise have been kept in captivity for many years with success, contributing to knowledge on social interactions, breeding behavior, and sensory physiology. The only other area with data on finless porpoise reproduction is Pakistan, but results are based on only 6 individuals. Nature World News. Marine Mammal Science. Neonatal length was estimated to be <77 cm, minimum length at sexual maturity was about 140 cm for males and 120 cm for females, and maximum known length was 155 cm (Harrison and McBrearty 1974). T. Sekido. The females have been known to carry her single young, or calf, on her back as on a saddle.
Retrieved 22 October 2013.
The Finless porpoise, as its name suggests, has no dorsal fin. The Finless porpoise, as its name suggests, has no dorsal fin.
Finless porpoise population decrease of 69.8% in just a 22-year span from 1976 to 2000. Reproduction.
M. Kataoka. Numbers of Indo-Pacific finless porpoises in Hong Kong and adjacent waters are estimated to be at least 217 individuals; in the coastal waters of Bangladesh there are 1,382 porpoises. Porpoises have between 60-120 teeth which are flattened into a spade shape at the tip. Males reach sexual maturity at four to six years of age, and females at six to nine years. Gannon. O. Yamashita. 9 (4): 392–406.
[63] Specimens were aged by sectioning and staining thin layers in the teeth, and counting dentinal and cemental growth layer groups (GLGS).
1 2 Shirakihara, M.; et al. Preliminary study on some serum hormones of Neophocaena phocaenoides in the Yangtze River. 30: 38 – 43.
The common porpoise makes a distinctive, explosive noise as it comes to the surface to exhale.
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Breeding and reproduction in captive finless porpoise. 1: 89 – 102. 5.3%. "Study of Yangtze Finless Porpoise Reveals Not All Cetaceans Hear Alike". We studied the growth and reproduction of finless porpoises in southern China, based on 86 specimens collected as strandings or fisheries bycatches in Hong Kong, southern Fujian Province, and Taiwan.
Newborn finless porpoises are reported to 72 to 84 cm in length. Porpoises have between 60-120 teeth which are flattened into a spade shape at the tip. [Google Scholar] Chen D Q, Zhao Q Z, Liu R J.
MATERIALS AND METHOD Description of the Inland Sea and area division The present study covers the Inland Sea proper.
Acta Theriologica Sin. reproduction of the finless porpoise in the Inland Sea, and to provide the basic biological data necessary for the conservation of the species. J Nanjing Normal Univ (Nat Sci) 18:114–124. Furuta.
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