Effects of hatching on-farm on behaviour, first week performance, fear level and range use of organic broilers
نویسندگان
چکیده
Hatching on-farm is an alternative to traditional hatching in the hatchery where incubated eggs are placed on farm embryonic day 18 for take place. Thus, several procedures and transport of newly hatched chicks avoided, have access feed water immediately after hatching. In present study, aim was examine behaviour, first week performance, fear level range use slower-growing organic broilers (OF). Chicks (HC) transported were used comparison. The study included six flocks both treatments, each consisting approximately 3600 mixed-sex Hubbard JA57 ColorYield broilers, housed with veranda access. Compared HC, body weight consistently higher OF at 0 h, 24 48 h D7 relative arrival HC (P < 0.001). Feeding more frequently observed than 11 35 0.024). Generally, drinking 0.001), resting during 23 0.016). crop content differed between treatments 6 12 36 but not h: At had odds having (odds ratio (OR) = 2.45; P 0.001) lower (OR 0.16; addition, they empty 3.01; (OR: 1.56; 0.018) 2.56; Reduced humans found chickens when assessed a stationary person test 0.030). also tended express less general novel object (D7, D28, D53 D60; 0.052). However, contrary expected, reduced fearfulness expressed by did result increased 0.92 0.45, respectively). To conclude, appears benefit animal welfare as, early age, it reduces allows feeding, likely being cause weight.
منابع مشابه
the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...
15 صفحه اولthe effects of time planning and task complexity on accuracy of narrative task performance
هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...
effects of first language on second language writing-a preliminary contrastive rhetoric study of farsi and english
to explore the idea the investingation proposed, aimed at finding whether the performances of the population of iranians students studying english in an efl context are consistent in l1 and l2 writing taks and whether there is a cross-linguistic transfer in this respect. in this regard the subjects were instructed to write four compositions-two in english and two in farsi-which consisted of an ...
15 صفحه اولthe effects of multiple intelligences (focus on musical, visual, and linguistic) and direct instruction on learning grammar: a case on iranian efl students at elementary level
1.0 overview it seems that grammar plays a crucial role in the area of second and foreign language learning and widely has been acknowledged in grammar research. in other words, teaching grammar is an issue which has attracted much attention to itself, and a lot of teachers argue about the existence of grammar in language teaching and learning. this issue will remind us a famous sentence f...
study the effects of low level laser diode on no production and healing of diabetic and cortisone acetate and normal wounded sd rats
nitric oxide (no) is a small molecule synthesized by most of mammalian cells with diverse biological activities including vasodilatation, host defense and wound healing. impaired wound healing is a common occurrence among diabetics and patients receiving glucocorticoid therapy. on the other hand the application of laser in biomedical area have been increased. thus, the current studies were desi...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Animal Behaviour Science
سال: 2021
ISSN: ['0168-1591', '1872-9045']
DOI: https://doi.org/10.1016/j.applanim.2021.105319