Today, the green pigeon (Treron calvus, TEMMINCK, 1811) holds an in-creasingly important place in the dietary habits of the populations of south-east of C?te d’Ivoire, especially those of Grand-Bassam. To provide foo...Today, the green pigeon (Treron calvus, TEMMINCK, 1811) holds an in-creasingly important place in the dietary habits of the populations of south-east of C?te d’Ivoire, especially those of Grand-Bassam. To provide food security to these customers a study was carried out. Objective: The current study is to identify the different protozoa and fungus that could po-tentially infect the green pigeon’s gut. Materials and Methods: The study was carried out on protozoa and digestive fungus in this species of pigeon in the south-east of C?te d’Ivoire. It has been carried out from November 2020 to February 2021. A total of sixty freshly dead pigeons, including 10 males and 50 females, have been bought in Grand-Bassam. After autopsy, the gut of each animal was preserved in formalin (10%) for a subsequent histopatho-logical examination. Results: The analysis of the results revealed the fol-lowing pathogen genus: Cryptosporidium spp, Histomonas spp, Toxoplasma gondii and Trichomonas spp for protozoa. Cryptococcus neoformans for fungus. The calculation of prevalence gave the following values: 63% [20;40] for protozoa and 37% [10;40] for fungus. Conclusion: The study showed that the intestine of the green pigeon of the Grand-Bassam region is infested by a range of pathogens. Namely: Cryptosporidium spp, Histomonas spp, Toxoplasma gondii, Trichonomas spp and Cryptococcus neoformans. Cryptococcus neoformans was the most common pathogen encountered in this study. Among these pathogens, some like Cryptococcus neoformans and Toxoplasma gondii are zoonosis. Thus, the present study deserves further investigation to know more about the nature of human infection in C?te d’Ivoire. Furthermore, given the diversity of digestive pathogens including zoonosis one, a reasonable recommendation to consumers would be stop eating the intestines.展开更多
试验旨在探究“2+2”生产模式下不同粗蛋白质水平对白王种鸽繁殖性能和乳鸽生长性能的影响。试验选取产蛋性能相近的300日龄健康种鸽168对,随机分为4组,每组7个重复,每个重复6对种鸽,每对种鸽哺育2只乳鸽。试验Ⅰ组、Ⅱ组、Ⅲ组和Ⅳ组...试验旨在探究“2+2”生产模式下不同粗蛋白质水平对白王种鸽繁殖性能和乳鸽生长性能的影响。试验选取产蛋性能相近的300日龄健康种鸽168对,随机分为4组,每组7个重复,每个重复6对种鸽,每对种鸽哺育2只乳鸽。试验Ⅰ组、Ⅱ组、Ⅲ组和Ⅳ组分别饲喂粗蛋白质水平为13.43%、15.04%、16.64%和18.25%的饲粮。试验期46 d,其中孵化期18 d (1~18 d),哺乳期28 d (19~46 d)。结果显示,试验Ⅱ组、Ⅲ组产蛋间隔显著低于试验Ⅰ组(P<0.05),试验Ⅲ组种蛋受精率显著高于试验Ⅰ组、Ⅳ组(P<0.05),试验Ⅲ组入孵蛋孵化率极显著高于试验Ⅰ组、Ⅱ组、Ⅳ组(P<0.01)。试验Ⅲ组乳鸽28日龄体重显著高于试验Ⅰ组(P<0.05),乳鸽屠宰率极显著高于试验Ⅰ组(P<0.01),乳鸽胸肌率显著高于试验Ⅰ组、Ⅱ组、Ⅳ组(P<0.05)。试验Ⅱ组、Ⅲ组、Ⅳ组窝料重比1极显著低于试验Ⅰ组(P<0.01)。研究表明,不同粗蛋白质水平影响了种鸽的繁殖性能、乳鸽的生长性能以及窝料重比,在“2+2”生产模式下,建议白王种鸽饲粮适宜粗蛋白质水平为16.64%。展开更多
恐惧情绪的研究对于动物情绪控制和发展有着重要意义。当前恐惧情绪对动物(尤其是鸟类)行为和脑活动的影响多偏重于行为学和生理学现象,缺乏涉及特定相关核团内神经电活动模式的动态分析研究。为了了解鸽子在恐惧情绪下的神经信号变化规...恐惧情绪的研究对于动物情绪控制和发展有着重要意义。当前恐惧情绪对动物(尤其是鸟类)行为和脑活动的影响多偏重于行为学和生理学现象,缺乏涉及特定相关核团内神经电活动模式的动态分析研究。为了了解鸽子在恐惧情绪下的神经信号变化规律,以鸽子为模式动物,以其脑室纤维膜周围灰质(stratum griseum periventriculare,SGP)核团为目标脑区,采用危险逐渐迫近的实验方法研究不同恐惧迫近距离下神经活动的变化模式,深入分析基于局部场电位(local field potential,LFP)信号的频域、时频能量和功能连接节律性差异。首先采集2只鸽子在静息状态和恐惧迫近实验的LFP信号,并提取Delta、Theta、Beta和Gamma这4个特征节律成分;然后采用自回归模型法计算了安静和恐惧两种状态在各节律下的功率谱密度占比差异;接着分析了恐惧状态下的时频能量随着迫近距离的变化的特异性变化;同时构建了基于相干性的脑功能网络,并对鸽子在安静和恐惧两种状态下的局部网络连接特性采用双因素方差分析方法进行了统计分析;最后对网络拓扑特征与迫近距离之间的关系进行了线性拟合分析。结果表明,鸽子恐惧迫近状态下Theta频段的功率谱占比和脑功能网络连接强度显著增加。随着迫近距离的缩短,Theta和Beta频段内的时频能量变化呈逐渐上升趋势,且局部网络连接强度与迫近距离之间呈现显著的负相关。说明Theta频段可能与恐惧情绪的表征有关,Theta和Beta频段的神经电信号特征差异能够表征恐惧迫近距离的变化。研究结果可以为进一步探索鸟类恐惧情绪的神经编码机制研究及其神经调控提供有价值的参考。展开更多
文摘Today, the green pigeon (Treron calvus, TEMMINCK, 1811) holds an in-creasingly important place in the dietary habits of the populations of south-east of C?te d’Ivoire, especially those of Grand-Bassam. To provide food security to these customers a study was carried out. Objective: The current study is to identify the different protozoa and fungus that could po-tentially infect the green pigeon’s gut. Materials and Methods: The study was carried out on protozoa and digestive fungus in this species of pigeon in the south-east of C?te d’Ivoire. It has been carried out from November 2020 to February 2021. A total of sixty freshly dead pigeons, including 10 males and 50 females, have been bought in Grand-Bassam. After autopsy, the gut of each animal was preserved in formalin (10%) for a subsequent histopatho-logical examination. Results: The analysis of the results revealed the fol-lowing pathogen genus: Cryptosporidium spp, Histomonas spp, Toxoplasma gondii and Trichomonas spp for protozoa. Cryptococcus neoformans for fungus. The calculation of prevalence gave the following values: 63% [20;40] for protozoa and 37% [10;40] for fungus. Conclusion: The study showed that the intestine of the green pigeon of the Grand-Bassam region is infested by a range of pathogens. Namely: Cryptosporidium spp, Histomonas spp, Toxoplasma gondii, Trichonomas spp and Cryptococcus neoformans. Cryptococcus neoformans was the most common pathogen encountered in this study. Among these pathogens, some like Cryptococcus neoformans and Toxoplasma gondii are zoonosis. Thus, the present study deserves further investigation to know more about the nature of human infection in C?te d’Ivoire. Furthermore, given the diversity of digestive pathogens including zoonosis one, a reasonable recommendation to consumers would be stop eating the intestines.
文摘试验旨在探究“2+2”生产模式下不同粗蛋白质水平对白王种鸽繁殖性能和乳鸽生长性能的影响。试验选取产蛋性能相近的300日龄健康种鸽168对,随机分为4组,每组7个重复,每个重复6对种鸽,每对种鸽哺育2只乳鸽。试验Ⅰ组、Ⅱ组、Ⅲ组和Ⅳ组分别饲喂粗蛋白质水平为13.43%、15.04%、16.64%和18.25%的饲粮。试验期46 d,其中孵化期18 d (1~18 d),哺乳期28 d (19~46 d)。结果显示,试验Ⅱ组、Ⅲ组产蛋间隔显著低于试验Ⅰ组(P<0.05),试验Ⅲ组种蛋受精率显著高于试验Ⅰ组、Ⅳ组(P<0.05),试验Ⅲ组入孵蛋孵化率极显著高于试验Ⅰ组、Ⅱ组、Ⅳ组(P<0.01)。试验Ⅲ组乳鸽28日龄体重显著高于试验Ⅰ组(P<0.05),乳鸽屠宰率极显著高于试验Ⅰ组(P<0.01),乳鸽胸肌率显著高于试验Ⅰ组、Ⅱ组、Ⅳ组(P<0.05)。试验Ⅱ组、Ⅲ组、Ⅳ组窝料重比1极显著低于试验Ⅰ组(P<0.01)。研究表明,不同粗蛋白质水平影响了种鸽的繁殖性能、乳鸽的生长性能以及窝料重比,在“2+2”生产模式下,建议白王种鸽饲粮适宜粗蛋白质水平为16.64%。
文摘恐惧情绪的研究对于动物情绪控制和发展有着重要意义。当前恐惧情绪对动物(尤其是鸟类)行为和脑活动的影响多偏重于行为学和生理学现象,缺乏涉及特定相关核团内神经电活动模式的动态分析研究。为了了解鸽子在恐惧情绪下的神经信号变化规律,以鸽子为模式动物,以其脑室纤维膜周围灰质(stratum griseum periventriculare,SGP)核团为目标脑区,采用危险逐渐迫近的实验方法研究不同恐惧迫近距离下神经活动的变化模式,深入分析基于局部场电位(local field potential,LFP)信号的频域、时频能量和功能连接节律性差异。首先采集2只鸽子在静息状态和恐惧迫近实验的LFP信号,并提取Delta、Theta、Beta和Gamma这4个特征节律成分;然后采用自回归模型法计算了安静和恐惧两种状态在各节律下的功率谱密度占比差异;接着分析了恐惧状态下的时频能量随着迫近距离的变化的特异性变化;同时构建了基于相干性的脑功能网络,并对鸽子在安静和恐惧两种状态下的局部网络连接特性采用双因素方差分析方法进行了统计分析;最后对网络拓扑特征与迫近距离之间的关系进行了线性拟合分析。结果表明,鸽子恐惧迫近状态下Theta频段的功率谱占比和脑功能网络连接强度显著增加。随着迫近距离的缩短,Theta和Beta频段内的时频能量变化呈逐渐上升趋势,且局部网络连接强度与迫近距离之间呈现显著的负相关。说明Theta频段可能与恐惧情绪的表征有关,Theta和Beta频段的神经电信号特征差异能够表征恐惧迫近距离的变化。研究结果可以为进一步探索鸟类恐惧情绪的神经编码机制研究及其神经调控提供有价值的参考。
