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首页> 外文期刊>Canadian Journal of Zoology >Assimilation efficiency of prey in the Hawaiian monk seal (Monachusschauinslandi)
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Assimilation efficiency of prey in the Hawaiian monk seal (Monachusschauinslandi)

机译：夏威夷和尚海豹（Monachusschauinslandi）中猎物的吸收效率

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摘要

Assimilation efficiency, digestive efficiency, metabolizable energy, and nitrogen retention in three captive adult male Hawaiian monk seals (Monachus schauinslandi) were measured with the indigestible marker chromic oxide for four experimental diets: a control diet of herring (Clupea harengus) and three test diets consisting of flagtail (Kuhlia sandvicensis), squid (Loligo sp.), and lobster (Panulirus marginatus), each of which was used in combination with herring. The addition of all three test prey to herring decreased the digestibility of gross energy by a mean of 3.58 +/- 3.89%. Assimilation efficiency of gross energy was 96.1 +/- 4.0% for herring, 73.8 +/- 6.8% for flagtail, and 94.1 +/- 5.7% for squid, but could not be determined for lobster. Digestive efficiency and metabolizable energy of the diets examined were high (4602.2 +/- 247.1 and 4062.5 +/- 178.4 kcal/d, respectively; 1 kcal = 4.18 kJ) and were positively correlated with the amount of gross energy ingested. Nitrogen retention was highest for the squid-herring diet (33.2 +/- 1.2 g.d(-1)) followed by the lobster-herring diet (11.5 +/- 3.3 g.d(-1)), the flagtail-herring diet (6.0 +/- 0.0 g.d(-1)), and the herring (control) diet (-5.7 +/- 1.6 g.d(-1)). This study indicates that prey which are both higher in protein and lower in fat than herring provide greater metabolizable energy for productive functions in Hawaiian monk seals.
机译：用四种食物的难消化性氧化铬对三种圈养成年雄性夏威夷和尚海豹（Monachus schauinslandi）的同化效率，消化效率，代谢能和氮保持率进行了测量，用于四种实验饮食：鲱鱼的对照饮食（Clupea harengus）和三种测试饮食由旗尾（Kuhlia sandvicensis），鱿鱼（Loligo sp。）和龙虾（Panulirus marginatus）组成，它们分别与鲱鱼结合使用。将所有三个猎物添加到鲱鱼中，平均总能量的消化率降低了3.58 +/- 3.89％。鲱鱼的总能量同化效率为96.1 +/- 4.0％，旗尾为73.8 +/- 6.8％，鱿鱼为94.1 +/- 5.7％，但无法确定龙虾。所检查饮食的消化效率和代谢能较高（分别为4602.2 +/- 247.1和4062.5 +/- 178.4 kcal / d; 1 kcal = 4.18 kJ），并且与摄入的总能量呈正相关。鱿鱼鲱鱼日粮的氮保持量最高（33.2 +/- 1.2 gd（-1）），其次是龙虾鲱鱼日粮（11.5 +/- 3.3 gd（-1）），旗鱼鲱鱼日粮（6.0 + /-0.0 gd（-1））和鲱鱼（对照）饮食（-5.7 +/- 1.6 gd（-1））。这项研究表明，比鲱鱼蛋白质含量高且脂肪含量低的猎物为夏威夷和尚海豹的生产功能提供了更大的代谢能。

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