Balancing act: Studying the effect of perch space allowance on welfare in Canadian laying strain pullets raised in floor pens with access to a single-tier perch system to 18 wk of age.

IF 3.8 1区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Poultry Science Pub Date : 2024-10-30 DOI:10.1016/j.psj.2024.104457
Carolin A B Adler, Tory Shynkaruk, Samantha McPhee, Kailyn Buchynski, Adelle Herr, Eugenia Herwig, Karen Schwean-Lardner
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Abstract

The rearing environment for pullets should mirror their later production environment as closely as possible. However, existing perch space recommendations are based on data for laying hens rather than pullets. This study explores the impact of perch space allowances on the welfare of Canadian laying strain pullets raised to 18 wk. Two trials were conducted with 1,032 Lohmann Brown-Lite (LB) and LSL-Lite (LW) pullets each. A randomized complete block (trial) design was used with a 4 (perch space) × 2 (strain) factorial arrangement. Birds were raised in 16 floor pens (3 × 3 m each; 897.67 cm2 per bird). Wooden perches were provided from d 1, allowing 6, 9, 12, or 15 cm perch space per pullet. Data were tested for normality, and log+1 transformed if necessary. Significance was declared at P≤0.05. Data were collected for basic health and functioning (body weight, mortality, pullet width, keel bone damage, and tibia bone parameters), affective states (comb damage, heterophil-to-lymphocyte (H/L) ratios, and behavior), and natural living (perch usage and jumping success). Perch space did not affect mortality, keel bone damage, tibia breaking strength, comb damage, or H/L ratios. At 16 and 18 wk, LB body weight slightly increased while the LW body weight decreased with increasing perch space (P=0.05 and 0.02). At 3 wk, pullets spent a higher percentage of time wing flapping on the perch when provided 15 cm compared to 6 cm (P=0.04). During the scotoperiod at 18 wk, a higher percentage of birds perched with 12 and 15 cm perch space than 6 cm (P<0.01). Pullet width at 18 wk was 12.52 cm (sitting) and 11.66 cm (standing) for the LB and 13.85 cm (sitting) and 12.94 cm (standing) for the LW. Overall, perch space allowance had minor effects on the measured welfare indicators. Based on pullet width, a minimum of 12.5 cm for LW and 13.9 cm for LB pullets should be provided to allow all pullets to sit on the perch simultaneously.

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平衡行为:研究栖架空间对加拿大产蛋品系小母鸡福利的影响,这些小母鸡在18周龄前在地面鸡舍饲养,可使用单层栖架系统。
小母鸡的饲养环境应尽可能接近其日后的生产环境。然而,现有的栖架空间建议是基于蛋鸡而非小母鸡的数据提出的。本研究探讨了饲养到 18 周的加拿大产蛋品系小母鸡的栖架空间对其福利的影响。两项试验各饲养了 1,032 只 Lohmann Brown-Lite (LB) 和 LSL-Lite (LW) 小母鸡。试验采用随机完全区组(试验)设计,因子排列为 4(栖架空间)×2(品系)。鸡在 16 个地面鸡栏(每个 3 × 3 m;每只鸡 897.67 cm2)中饲养。从第 1 天开始提供木质栖架,每只小鸡有 6、9、12 或 15 厘米的栖架空间。对数据进行正态性检验,必要时进行 log+1 转换。P≤0.05为显著性。收集的数据包括基本健康和机能(体重、死亡率、小蓝耳宽度、龙骨损伤和胫骨参数)、情感状态(梳子损伤、嗜异性细胞与淋巴细胞(H/L)比率和行为)以及自然生活(鲈鱼使用率和跳跃成功率)。栖木空间对死亡率、龙骨损伤、胫骨断裂强度、梳子损伤或 H/L 比率没有影响。在16和18周时,随着栖架空间的增加,LB体重略有增加,而LW体重下降(P=0.05和0.02)。3周时,当栖木高度为15厘米时,小鸡在栖木上拍翅的时间比例高于6厘米(P=0.04)。在 18 周的昼伏夜出期,12 厘米和 15 厘米的栖木空间比 6 厘米的栖木空间有更高比例的鸟类栖息(P=0.05 和 0.02)。
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来源期刊
Poultry Science
Poultry Science 农林科学-奶制品与动物科学
CiteScore
7.60
自引率
15.90%
发文量
0
审稿时长
94 days
期刊介绍: First self-published in 1921, Poultry Science is an internationally renowned monthly journal, known as the authoritative source for a broad range of poultry information and high-caliber research. The journal plays a pivotal role in the dissemination of preeminent poultry-related knowledge across all disciplines. As of January 2020, Poultry Science will become an Open Access journal with no subscription charges, meaning authors who publish here can make their research immediately, permanently, and freely accessible worldwide while retaining copyright to their work. Papers submitted for publication after October 1, 2019 will be published as Open Access papers. An international journal, Poultry Science publishes original papers, research notes, symposium papers, and reviews of basic science as applied to poultry. This authoritative source of poultry information is consistently ranked by ISI Impact Factor as one of the top 10 agriculture, dairy and animal science journals to deliver high-caliber research. Currently it is the highest-ranked (by Impact Factor and Eigenfactor) journal dedicated to publishing poultry research. Subject areas include breeding, genetics, education, production, management, environment, health, behavior, welfare, immunology, molecular biology, metabolism, nutrition, physiology, reproduction, processing, and products.
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