摘要: Myostatin, which is a highly con servative gene among breeds, is a negative regulator of muscle The 3' coding reg ion of wild boar and crossbred pig myostatin was cloned by RT-PCR and sequenced Compared with that of GenBank, the homology of the nucleotide sequence between wild boar and crossbred pig is identical in this region indicating that domestic pigs were evolved from wild boar and there was not changed in this region durin g the evolution processes

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摘要: 应用聚类分析的方法，对小兴安岭地区野猪冬季卧息地选择进行了研究。结果表明，对其影响的主要因子是人为干扰、坡向和隐蔽条件。其次是植被类型、食物丰盛度、坡度和水源。坡位和海拔也有一定影响。其最适卧息地生坑条件的选择依次为：草甸沟塘或阔叶林植被，食物丰盛度中等以上，隐蔽级≥０．５．阳坡，卧息地距人为干扰源＞１０００ｍ和距水源＜１０００ｍ。

摘要: 2008年11月18日至2009年3月20日,为了调查黑龙江省完达山东部林区野猪种群数量和栖息地特征,我们采用随机布设样线的方法在东方红林业局境内13个林场共布设大样方40个,样线200条。调查结果表明,东方红林业局境内野猪分布平均密度为0.175头/km2,种群数量为546～680头;野猪主要分布在河口、奇源、青山、五林洞、独木河、海音山和东林7个林场,位于海拔300～800m的范围内。1989年调查的野猪平均密度为0.372头/km2,种群数量为1302头;2002年调查的野猪平均密度为0.342头/km2,种群数量为1198头。近年来野猪种群密度降低,种群数量呈加速下降趋势。对野猪栖息地特征分析表明,野猪喜欢选择中坡位、阳坡、坡度小于5°、地表植被盖度大于30%、隐蔽度和郁闭度在25%～50%之间的生境。阔叶林、灌丛是野猪的主要栖息地。非法捕猎、森林采伐、坚果采摘和东北虎的捕食是造成野猪种群数量减少、栖息地质量下降的主要因素。

摘要: Heart,lung,liver,stomach,large intestine and small intestine of wild pigs captured from the Ziwulin Mountains,Gansu were measured and compared with those of Bamei,a local domestic pig breed. Each group included two males and one female with body weights ranging from 33 kg to 43 kg. In addition,feed digestion of wild and Bamei pigs were determined in two males and one female with body weights of 53 ± 2.3 kg using a total feces collection method. Results showed that only the relative weight of lung of the wild pigs (2.1%) was significantly (P<0.01) larger than that of Bamei. All the remaining measurements of wild pigs including lengths of large intestine (3.36 ± 0.38 m) and small intestine (14.15 ± 0.31 m),lumen volumes of stomach (1.82 ± 1.36 L) and large intestine (5.91 ± 1.04 L),and weights of stomach (0.38 ±0.05 kg),large intestine (0.47 ±0.04 kg) and small intestine (0.60 ±0.03 kg) were all less than those of Bamei (P<0.05). Digestive indices of wild pigs including daily digestible mass of crude protein (0.23 ±0.13 kg) and crude fiber (0.06 ±0.03 kg),percent digestibility for crude fiber (45.7 ± 1.8%) and daily intake of crude fiber (2.44 ± 0.15 kg) were all lower than those of Bamei (P<0.05). However,percent digestibilities of wild pigs for crude protein (75.9 ± 1.3%) and phosphorus (36.2 ± 2.3%) were higher than those of Bamei (P< 0.05). These results suggest a potential benefit in development of management strategies for domestic production of wild pigs.