发情检测,就是识别母猪正在排卵且愿意公猪接近的过程。人工授精技术在行业的广泛应用,
使查情人员承担越来越大的查情压力。因此,良好的繁育成绩取决于准确地识别每头母猪的发情状态并及时进行人工授精。
猪场的查情公猪可以帮助识别人工授精的时间窗口。通过查情公猪的
性刺激,发情母猪会表现出性行为反应。这些表现,可以帮助猪场确
定配种的时间。
成功的关键因素:
发情母猪最可靠的鉴定指标是压背时出现“静立反射standing reflex”,这
个被称为“压背试验”。母猪会轻微的拱起背部,双腿挺直,肌肉收缩,
就像准备好被骑跨一样。在公猪在现场时,整个发情期都可以观察到这种
行为。在没有公猪的情况下,发情母猪不会表现出这种典型的行为,或者
间歇性表现出这种行为,从而使养殖场人工授精计划面临风险。
除了压背检测的典型反应外,母猪发情的其他典型表现包括:
并不是每一头母猪都会有这些典型表现,不同的母猪存在个体差异。
“查情的艺术”就是识别不同母猪的特定信号以判定发情状态的技术。
检测发情的启动非常重要,因为它决定了首次人工授精的时间:
检测发情结束也非常重要。发情消退后的人工授精会增加泌尿道感染的风险,同时会引起生育力下降和窝产仔数降低。精准的发情检测,有利于优化人工授精的次数。
性成熟的公猪会在唾液中释放三种信息素分子,这三种分子可以通过
口鼻接触传递给母猪,从而在刺激发情母猪产生性行为反应中发挥重
要作用。
更多的气味重要性信息请转至下一页。
REFERENCES: 1. Hemsworth et al. 1988. Habituation to boar stimuli: possible mechanism responsible for the reduced detection rate of estrus gilts housed adjacent to boars. Appl. Anim. Beha. Sci. 19:255-64. 2. Soede NM, Wetzels CC, Zondag W, de Koning MA, Kemp B. Effects of time of insemination relative to ovulation, as determined by ultrasonography, on fertilization rate and accessory sperm count in sows. J Reprod Fertil. 1995 May;104(1):99-106. and Steverink DW, Soede NM, Bouwman EG, Kemp B. Influence of insemination-ovulation interval and sperm cell dose on fertilization in sows. J Reprod Fertil. 1997 Nov;111(2):165-71. 3. Terqui M., Guillouet P., Maurel M‐C., Martinat‐Botté F., 2000. Relationship between peri‐œstrus progesterone levels and time of ovulation by echography in pigs and influence of the interval between ovulation and artificial insémination on litter size. Reprod. Nutr. Develop., 40, 393‐404. 4. Rozeboom KJ, Troedsson MH, Shurson GC, Hawton JD, Crabo BG. Late estrus or metestrus insemination after estrual inseminations decreases farrowing rate and litter size in swine. J Anim Sci. 1997 Sep;75(9):2323-7. 5. Memento de l’éleveur de Porc, 2013. 6. Signoret & du Mesnil du Buisson. 1961. Etude du comportement de la truie en oestrus. IVth Congr. int. Reprod. Anim., La Haye, 171-5.
“There is no doubt about the heat after applying BoarBetter. Those who are in heat are locked up.”
M.S., Spanish Vet
“BoarBetter helps sows who are not reacting to the boar, by stimulating them to express their heat behaviour – enabling you to detect heat better across the sow batch.”
D.M., Spanish Vet
“BoarBetter helps make sows less restless, which makes insemination easier.”
V.C., Spanish Vet
“In my breeding management, I chose to use BoarBetter on all first parity after the boar has passed through. Detection is easier because the signs of heat are clearer.“
J.C., Farm Manager, France
“BoarBetter’s odour is very similar to strong-smelling search boars. The sows have a higher response with Boarbetter compared with a single commercial pheromone product. The best way to implement the use of Boarbetter in the daily routine might be a puzzle.“
Veterinarian, Netherland
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