Underwater behavioral patterns of one Yangtze finless porpoise （Neophocaena phocaenoides asiaeorientalis） calf in captivity and those performed on the water surface by two calves in semi-natural environment were foc...Underwater behavioral patterns of one Yangtze finless porpoise （Neophocaena phocaenoides asiaeorientalis） calf in captivity and those performed on the water surface by two calves in semi-natural environment were focally followed and continuously recorded until one year postpartum to construct the ethogram. The results indicate that 1） the three calves could display diverse and active behavioral patterns; 2） soon after birth, patterns critical for survival appeared first; 3） playful and social patterns predominated the ethogram; 4） most of the patterns were alike across age classes; 5） most of the patterns appeared at the calves’ early life stage. It is possible that the above characteristics are adaptively shaped by the aquatic and social life of this subspecies.展开更多
From August 25,2006 to August 15,2007 in the open water of Tongling Freshwater Porpoise National Nature Reserve,the diurnal behavior and time budget of a pregnant Yangtze finless female porpoise(Neophocaena phocaenoid...From August 25,2006 to August 15,2007 in the open water of Tongling Freshwater Porpoise National Nature Reserve,the diurnal behavior and time budget of a pregnant Yangtze finless female porpoise(Neophocaena phocaenoides asiaeorientalis)was observed using focal-animal and continuous sampling methods.The results indicated that:1)the female predominantly invested its time in feeding(66.0±1.1%,Mean±SE),followed by traveling(11.5±0.3%),resting(10.5±0.5%),socializing(9.8±1.1%)and other(2.1±0.1%),2)among different months,it showed significant differences for each of the above behaviors except traveling,3)each of the five behaviors was significantly different among the 11 periods of the day,and 4)significant differences were observed for each of the five behaviors across the five zones of the water.展开更多
基金National Basic Research Program of China(2007CB411600)National Natural Science Foundation of China(30730018)President Fund of Chinese Academy of Sciences(220103)~~
文摘Underwater behavioral patterns of one Yangtze finless porpoise （Neophocaena phocaenoides asiaeorientalis） calf in captivity and those performed on the water surface by two calves in semi-natural environment were focally followed and continuously recorded until one year postpartum to construct the ethogram. The results indicate that 1） the three calves could display diverse and active behavioral patterns; 2） soon after birth, patterns critical for survival appeared first; 3） playful and social patterns predominated the ethogram; 4） most of the patterns were alike across age classes; 5） most of the patterns appeared at the calves’ early life stage. It is possible that the above characteristics are adaptively shaped by the aquatic and social life of this subspecies.
文摘From August 25,2006 to August 15,2007 in the open water of Tongling Freshwater Porpoise National Nature Reserve,the diurnal behavior and time budget of a pregnant Yangtze finless female porpoise(Neophocaena phocaenoides asiaeorientalis)was observed using focal-animal and continuous sampling methods.The results indicated that:1)the female predominantly invested its time in feeding(66.0±1.1%,Mean±SE),followed by traveling(11.5±0.3%),resting(10.5±0.5%),socializing(9.8±1.1%)and other(2.1±0.1%),2)among different months,it showed significant differences for each of the above behaviors except traveling,3)each of the five behaviors was significantly different among the 11 periods of the day,and 4)significant differences were observed for each of the five behaviors across the five zones of the water.
