Reproductive seasonality and maturity of male Neophocaena phocaenoides asiaeorientalis in captivity: A case study based on the hormone evidence

References

• Byers , SW , Dowsett , KF and Glover , TD . 1983 . Seasonal and circadian changes of testosterone levels in the peripheral blood plasma of stallions and their relation to semen quality . J. Endocrinol. , 99 : 141 – 150 .
   PubMed Web of Science ®Google Scholar
• Chang , Q and Zhou , KY . 1995 . The growth and reproduction of finless porpoise, Neophocaena phocaenoides, in the Yangtze River and Yellow/Bohai Sea . Journal of Nanjing Normal University , 18 ( supp ) : 114 – 124 .
   Google Scholar
• Chen , DQ , Zhao , QZ and Liu , RJ . 1997 . Preliminary study on some serum hormones of Neophocaena phocaenoides in the Yangtze River . Acta Theriol. Sin. , 17 : 43 – 47 .
   Google Scholar
• Chen , PX , Liu , RJ and Harrison , RJ . 1982 . Reproduction and reproductive organs in Neophocaena asiaeorientalis from Yangtze River . Aquat. Mammals , 9 : 9 – 16 .
   Google Scholar
• Folkens , P , Reeves , R , Stewart , B , Clapham , P and Powell , J . 2002 . Guide to marine mammals of the world , New York : Alfred A. Knopf, Inc. and Toronto: Random House of Canada, Limited .
   Google Scholar
• Gao , AL and Zhou , KY . 1993 . Growth and reproduction of three populations of finless porpoise, Neophocaena phocaenoides, in Chinese waters . Aquat. Mammals , 19 : 3 – 12 .
   Google Scholar
• Hua , YY , Xiang , CS , Dong , ML , Zhang , XF , Chen , NG and Xu , XM . 1994 . Study on the sexual and feeding behavior of the captured black finless porpoise (Neophocaena phocaenoides) in Yangtze River . Resources and Environment in the Yangtze Valley , 3 : 140 – 146 .
   Google Scholar
• IUCN red list of threatened species [Internet] . International Union for Conservation of Nature and Natural Resources IUCN: Species Survival Committee, 2004-[cited 2005 Apr 16] Available from: http://www.redlist.org
   Google Scholar
• Jiang , XF . 1995 . Study on the morphogenesis of foetus and reproductive regularity the finless porpoise, Neophocaena phocaenoides . Acta Hydrob. Sin. , 19 : 211 – 215 .
   Google Scholar
• Jiang , XF . 1998 . Studies on the development and histological characteristics of black finless porpoise, Neophocaena phocaenoides in the Yangtze River . Acta Hydrob. Sin. , 22 : 341 – 345 .
   Google Scholar
• Kirby , VL . 1990 . “ Endocrinology of marine mammals ” . In Handbook of marine mammal medicine: Health, disease, and rehabilitation , Edited by: Dierauf , LA . 303 – 351 . Boca Raton, Ann Arbor, Boston : CRC Press .
   Google Scholar
• Pak , TR , Lynch , GR and Tsai , PS . 2002 . Differential alteration of the reproductive axis by testosterone and estrogen in peripubertal and adult male Siberian hamsters (Phodopus sungorus) . Biol. Reprod. , 67 : 706 – 711 .
   PubMed Web of Science ®Google Scholar
• Perrin , WF and Myrick , AC . 1981 . Age determination of toothed whales and sirenians. Report of International Whaling Committee (Special Issue 3) 299
   Google Scholar
• Schneyer , A , Castro , A and Odell , D . 1985 . Radioimmunoassay of serum follicle stimulating hormone and luteinizing hormone in the bottlenose dolphin, Tursiops truncates . Biol. Reprod. , 33 : 844 – 853 .
   PubMed Web of Science ®Google Scholar
• Schroeder , JP and Keller , KV . 1989 . Seasonality of serum testosterone levels and sperm density in Tursiops truncates . J. Exp. Zool. , 249 : 316 – 321 .
   PubMedGoogle Scholar
• Wang , D , Hao , YJ , Wang , KX , Zhao , QZ , Chen , DQ , Wei , Z and Zhang , XF . 2005 . The first Yangtze finless porpoise successfully born in captivity . Environ. Sci. & Pollut. Res. , 5 : 247 – 250 .
   Web of Science ®Google Scholar
• Wang , D , Liu , RJ , Zhang , XF , Yang , J , Wei , Z , Zhao , QZ and Wang , XQ . 2000 . Population status and conservation of the Yangtze finless porpoise . Occasional Papers of the IUCN/SSC , 23 : 81 – 85 .
   Google Scholar
• Wang , JC , Zhang , XR , Wang , GY and Zhang , JH . 1998 . Manipulation of animal reproduction. , Hefei (China) : Anhui Sciences and Technology Press .
   Google Scholar
• Wang , PL . 1992 . On the taxonomy of the finless porpoise in China . Fisheries Sci. , 11 : 10 – 14 .
   Google Scholar
• Wei , Z , Wang , D , Zhang , XF , Wang , KX , Chen , DQ , Zhao , QZ , Kuang , XA , Gong , WM and Wang , XQ . 2004 . Observation on some sexual behavior of the Yangtze finless porpoise (Neophocaena phocaenoides asiaerientals) in captivity . Acta Theriol. Sin. , 24 : 98 – 102 .
   Google Scholar
• Wei , Z , Wang , D , Zhang , XF , Zhao , QZ , Wang , KX and Kuang , XA . 2002 . Population size, behavior, movement pattern and protection of Yangtze finless porpoise at Balijiang section of the Yangtze River . Resources and Environment in the Yangtze Basin , 11 : 427 – 432 .
   Google Scholar
• Yoshioka , M , Mohri , E , Tobayama , T , Aida , K and Hanyu , I . 1986 . Annual changes in serum reproductive hormone levels in the captive female bottle-nosed dolphins . B. Jpn. Soc. Sci. Fish. , 52 : 1939 – 1946 .
   Web of Science ®Google Scholar
• Zhang , XF , Liu , RJ , Zhao , QZ , Zhang , GC , Wei , Z , Wang , XQ and Yang , J . 1993 . Populations of the finless porpoise in the middle and lower reaches of the Yangtze River, China . Acta Theriol. Sin. , 13 : 260 – 270 .
   Google Scholar
• Zhang , XF . 1992 . Studies on the age determination, growth and reproduction of finless porpoise Neophocaena phocaenoides . Acta Hydrob. Sin. , 16 : 289 – 298 .
   Google Scholar