Influence of climatic elements on the reproductive traits of Romanov sheep in the Bilogora region, Croatia

Q3 Veterinary

Veterinarska stanica Pub Date : 2022-12-30 DOI:10.46419/vs.54.4.2

Mislav Kovačić, M. Samardžija, A. Dobos, S. Krčmar, Mirta Sudarić Bogojević, D. Đuričić

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引用次数: 1

Abstract

The study aimed to determine the influence of air temperature, amount of precipitation and sunlight duration on the reproductive traits of the Romanov sheep in the Bilogora region, Croatia.Animals were kept in a fenced rotating pasture with access to stables during the night. Sheep were naturally mated. During three consecutive years (2019-2021), reproductive performance data were collected for four sheep flocks (n=26-57). Data on air temperature, sunlight duration, and daily precipitation volumes were obtained from the Croatian Meteorological and Hydrological Service (CMHS), Zagreb, Croatia, from the nearest meteorological recording station, located within 5-15 km of farms. A total of 425 ewes were mated, of which 399 successfully conceived and 851 lambs were born, with an average litter size of 1.63. The average fertility during the study was 93.88%. Lambing distribution was not equally distributed throughout the year as 73% of all lambs were born during winter and spring (winter 51.88%; spring 21.31%; summer 13.53% and autumn 13.28%). Sexual activity was lowest from the end of March to May, while the peak of sexual activity was from the end of August to October. There was a positive or negative correlation (P<0.0001 (Kruskall-Wallis)) between air temperature, sunshine duration and amount of precipitation with certain reproductive traits (number of pregnant and non-pregnant ewes). Daily average air temperatures were highest in summer but drop suddenly at the start of the breeding season in early autumn. Also, the day begins to shorten, and night begins to become longer which is crucial for shortday breeder species such as sheep and goats. Other factors, such as relative humidity and rainfall, can also directly or indirectly impact sexual activity and significantly affect fertility. The results indicate that air temperature, amount of precipitation, and sunlight duration during different months or seasons could influence the reproductive traits of Romanov sheep in Bilogora region, Croatia.

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克罗地亚比洛戈拉地区气候因素对罗曼诺夫绵羊繁殖特性的影响

这项研究旨在确定空气温度、降水量和日照时间对克罗地亚比洛戈拉地区罗曼诺夫绵羊繁殖特性的影响。动物被饲养在一个有围栏的旋转牧场中，夜间可以进入马厩。绵羊是自然交配的。在连续三年（2019-2021）期间，收集了四个绵羊群（n=26-57）的繁殖性能数据。关于气温、日照时间和日降水量的数据是从克罗地亚萨格勒布的克罗地亚气象和水文局（CMHS）从距离农场5-15公里的最近气象记录站获得的。共有425只母羊交配，其中399只成功受孕，851只羔羊出生，平均产仔数为1.63只。研究期间的平均生育率为93.88%。由于73%的羔羊出生在冬季和春季（冬季51.88%；春季21.31%；夏季13.53%和秋季13.28%），羔羊在全年的分布并不均匀。性活动在3月底至5月最低，而性活动的高峰在8月底至10月。气温、日照时间和降水量与某些繁殖特征（怀孕和未怀孕母羊的数量）之间存在正相关或负相关（P＜0.0001（Kruskall-Wallis））。日平均气温在夏季最高，但在初秋繁殖季节开始时突然下降。此外，白天开始变短，夜晚开始变长，这对绵羊和山羊等短日繁殖物种至关重要。其他因素，如相对湿度和降雨量，也会直接或间接影响性活动，并显著影响生育能力。结果表明，不同月份或季节的气温、降水量和日照时间都会影响克罗地亚比洛戈拉地区罗曼诺夫绵羊的繁殖特性。

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来源期刊

Veterinarska stanica Veterinary-Veterinary (all)

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： The goal of the journal is to provide an international platform for the publication of articles in the fields of veterinary and animal sciences, and biotechnology. The content of the journal is particularly dedicated to veterinary practitioners, but also to veterinary scientists and university professors, to encourage them to share their knowledge and experience on this platform. Manuscripts submitted to the journal may include: original scientific papers, review articles, short communications, professional articles, case reports, conference reports and literary records and reviews of new book either in Croatian or English languages.