摘要
于1993年4月10日，在日本江之岛水族馆，江豚顺利分娩。对其分娩过程，以及与之相关的呼吸、活动行为进行较详细的观察和研究。结果表明，母豚将小豚的尾部生出占分娩的绝大部分时间。分娩后期段平均呼吸频率减缓，游动速度放慢，水面活动增多，并趋于单独活动。此外，还记录到母豚的喷水、跳水、收腹、摆尾、转游等分娩时的特殊行为以及出生后幼豚的行为。
A pregnant finless porpoise (Neophocaena phocaenoides), whose body length (BL) was1.63m and body weight (BW) was 75.8kg, gave birth to a female calf successfully in EnoshimaAquarium, Japan on April 10, 1993- The process of the parturition and its related behaviors onrespiration and movement of this female, together with those of the male (BL = 1.67m, BW= 58kg)and the calf (BL= 0.75m, BW= 7.2kg) (Tab. 1) in the same pool were inspected in four periods:before parturition, earier stage of the parturition, later stage of the parturition and after parturition.The results show tha before the parturition started, there was mucus coming out of female's genitalslit continually. The parturition lasted for 153.77min and it began at 19:12. It took 141.25min forthe fluke and caudal peduncle of the calf to be delivered, bu the delivery of the rest part of thecalf took ouly 12.52mn (Tab.2, Plate i). The average respiration rate of the mother increased tosom extent before parturation to earier stage of paxturition. However, the respiration rate decreasedslightiy at the later stage of the parturition. The average respiration rato of the calf was 6.87 times /min and apparentiy higher than that of its mother (Tab.3). There were 3 types of movements of themother porpose: surface movement,slow swimming (about 0.1-0.2m / s) and fast swimming (about1-2m / s). With the process of parturition. the duration of the surface movement increased andswimming speed slowed down (Tab. 4). The calf's movement was always characterised by fastswimming near the water surface. Because its sense of direction was very weak, the calf bouncedpool wall 6 times during observed. In the parturition process the mother moved alone all the time.However, it swam together with the male as soon as the paxturition was completed (Tab. 5). Noobvious nursing behaviors were observed. Moreover, some concomitan behaviors of parturition suchas jetting water (2 times), jumping (85 times), abdomen-bending (7 times), fluke swinging (7 times)and rolling swimming (4 times) were
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1998年第1期41-46,T001,共7页
Oceanologia Et Limnologia Sinica
基金
中日合作研究项目
关键词
江豚
分娩行为
相关行为
母豚
鲸
Finless porpoise (Neophocaena phocaenoides)
Parturition behavior
