Open AccessProductive performance, thermal and blood parameters of Japanese laying quails at different cage stocking densities
Author(s) -
Venúcia de Diniella Santos Bourdon,
Rannyelle Gomes Souza,
Everton José do Nascimento Oliveira,
Danilo Vargas Gonçalves Vieira,
Sandro Estevan Moron,
Roberta Marçal Gomes Vieira Vaz,
Kenia Rodrigues Ferreira,
Liana Bezerra Dias de Lima,
Gilzelle Maria da Luz Silva,
Josimar Santos de Almeida,
Tádia Emanuele Stivanin,
Ricardo Romão Guerra,
Thalita Rodrigues de Oliveira,
Jossiel dos Santos da Cruz,
Fernando Guilherme Perazzo Costa
Publication year - 2021
Publication title -
research, society and development
Language(s) - English
Resource type - Journals
ISSN - 2525-3409
DOI - 10.33448/rsd-v10i3.13686
Subject(s) - stocking , zoology , cage , biology , quail , eggshell , feed conversion ratio , body weight , ecology , mathematics , endocrinology , combinatorics
This study aimed to evaluate the effects of different stocking densities on the performance, eggshell quality, surface body temperature and hematological parameters of Japanese laying quails based on physiological indicators of animal welfare. Two hundred and thirty seven-week-old Japanese quails were used in this experiment. The quails were completely randomized to four stocking densities: 112.2 (T1), 102 (T2), 93.5 (T3), and 86.31 (T4) cm²/quail and five replicates each. Hematological parameters were analyzed as a 4x4 factorial design (stocking density X time) over four periods of blood sampling (25, 50, 75, and 100 days). To obtain the body surface temperature (Ts, °C) three thermograms (head, core and shin) were captured from each repetition per plot (2 repetitions per experimental plot) every 25 days (25, 50, 75, and 100 days). Feed intake, feed conversion per egg mass, feed conversion per dozen eggs, egg mass, egg production rate, and eggshell quality-related variables were not affected by treatments. However, egg weight (p = 0.023) and core temperature (p = 0.003) were influenced by different cage stocking densities. The heterophil/lymphocyte ratio increased (p = 0.01) with increasing time and stocking density. The mean corpuscular volume (p = 0.0001) as well as the total leukocyte count (p = 0.001) increased until the third blood sampling period (75 days) and then decreased in the last period. Different stocking densities do not interfere with the performance and eggshell quality of Japanese quails. However, the hematological parameters and head temperature are affected by different cage stocking densities and time.