Panigrahy K K, Behera K, Mandal A K, Sethy K, Panda S
a Division of Livestock Production Management , ICAR-National Dairy Research Institute , Karnal , India.
b Department of Livestock Production Management, College of Veterinary Science , Odisha University of Agriculture and Technology , Bhubaneswar , India.
Br Poult Sci. 2017 Dec;58(6):605-609. doi: 10.1080/00071668.2017.1373388. Epub 2017 Sep 21.
(1) To evaluate the cognitive ability of male and female Vanaraja birds, three hundred and sixty 1-d-old sexed chickens were reared under similar conditions in three treatment groups with 4 replicates in each group: 120 females in Treatment 1, 120 males in Treatment 2 and both males and females (60 + 60) as a mixed group in Treatment 3. (2) To assess learning ability, the birds were trained in T- and Y-mazes and tested at 3-week intervals in 4 test schedules (21, 42, 63 and 84 d). The birds were put into tonic immobility (TI) in each test schedule. (3) In each maze test, the latency to find the feed was regarded as a successful completion of the task. In the TI-test, the time taken to stabilise on a plane surface after swinging in the hanging cradle for 20-25 s was recorded. (4) The results indicated that male birds appeared to be cognitively superior to females in terms of learning and cognitive evolution in all the mazes, but by d 84, the females performed as well as the males. With increasing age, spatial memory gathering and processing improved. In the TI-test, the effect of sex or grouping system had no significant effect on the performance of birds at the various ages.
(1) 为评估雄性和雌性梵纳拉贾鸡的认知能力，将360只1日龄已确定性别的鸡在相似条件下饲养于三个处理组中，每组有4个重复：处理1组有120只雌性鸡，处理2组有120只雄性鸡，处理3组为雄性和雌性混合组（60只 + 60只）。(2) 为评估学习能力，对这些鸡在T型迷宫和Y型迷宫中进行训练，并在4个测试时间点（21、42、63和84日龄）每隔3周进行测试。在每个测试时间点将鸡置于强直性静止状态（TI）。(3) 在每次迷宫测试中，找到饲料的潜伏期被视为任务的成功完成。在TI测试中，记录鸡在悬挂摇篮中摆动20 - 25秒后在平面上稳定所需的时间。(4) 结果表明，在所有迷宫的学习和认知进化方面，雄性鸡在认知上似乎优于雌性鸡，但到84日龄时，雌性鸡的表现与雄性鸡一样好。随着年龄的增长，空间记忆的收集和处理能力有所提高。在TI测试中，性别或分组系统对不同年龄鸡的表现没有显著影响。
