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首页> 外文期刊>Marine ecology progress series >Transfer of fatty acids from mothers to their calves during lactation in white whales Delphinapterus leucas
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Transfer of fatty acids from mothers to their calves during lactation in white whales Delphinapterus leucas

机译：哺乳期白鲸Delphinapterus leucas中脂肪酸从母亲向小牛的转移

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Blubber biopsies, through the entire blubber layer, were collected from the members of 4 mother-calf pairs of white whales Delphinapterus leucas from Storfjorden, Svalbard, Norway. In addition, milk samples were collected from all 4 adult females. The calves ranged in age/size from newborn (with the umbilical cord still attached; 140 cm in length) up to a 1 yr old (body length of 255 cm). Since white whale calves consume only milk during their first year of life, free-living mother-calf pairs provide an interesting opportunity to study the deposition of lipids (calf blubber) when the diet (i.e. milk) is known precisely. The blubber of the newborn calves had fatty-acid (FA) compositions that differed significantly from the FA compositions of both the milk and the blubber of their respective mothers. The FA composition of the blubber of calves changed gradually with age, coming to resemble the FA composition of the blubber of their mothers more closely, rather than shifting towards the FA composition of the milk, i.e. their diet. The largest calf in the study had a blubber FA composition similar to that Of the adult whales. Analyses also showed that the FA composition of the milk was significantly different from the FA composition of the maternal blubber,
机译：从挪威斯瓦尔巴特群岛的Storfjorden的4对母小牛对的白鲸Delphinapterus leucas的成员中收集了整个脂肪层的活组织检查标本。另外，从所有4名成年女性中采集牛奶样品。小牛的年龄/大小从新生儿（仍附有脐带；长度140厘米）到1岁（体长255厘米）不等。由于白鲸犊牛在出生的第一年仅消耗牛奶，因此，在精确知道饮食（即牛奶）的情况下，自由生活的母犊对提供了研究脂质（犊牛脂肪）沉积的有趣机会。新生小牛的油脂中的脂肪酸（FA）成分与牛奶和各自母亲的油脂中的FA成分明显不同。犊牛脂肪的脂肪酸组成随着年龄的增长而逐渐变化，越来越接近其母亲脂肪的脂肪酸组成，而不是转向牛奶的脂肪酸组成，即饮食。该研究中最大的小牛的脂肪FA组成与成年鲸相似。分析还表明，牛奶中的FA成分与母体脂的FA成分显着不同，

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