Artificial long-day photoperiod in the subtropics increases body weight in goat kids born in the autumn

Flores, Maximino Luna; Flores, Jerónimo Landeros; Duarte, Gerardo; Vielma, Jesús; Delgadillo, J.A.; Hernández, H.

doi:10.1016/j.smallrumres.2018.11.013

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…Male kids grow and gain weight faster than female kids (Mavrogenis et al, 1984). This sex effect observed in the present study is parallel to those obtained in a recent study by Flores et al (2018). These authors observed that treatment with artificial long days to goat kids from d 4 up to 27 d of age induces a greater daily weight gain in males than in females.…”

Section: Discussionsupporting

confidence: 90%

Melatonin administration during the dry period stimulates subsequent milk yield and weight gain of offspring in subtropical does kidding in summer

Avilés

Delgadillo

Flores

et al. 2019

Journal of Dairy Science

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In the present experiment, we tested the hypothesis that in does kidding in summer, melatonin administration during dry period is galactopoietic for the subsequent lactation and results in improved growth of their suckling kids. Twenty-five multiparous pregnant creole does were enrolled into a randomized complete block design during their dry period in the 49 d prepartum, and under natural long photoperiods around the summer solstice, pregnant does either received 2 subcutaneous ear implants (18 mg) of melatonin (MEL, n = 10) or served as nonimplanted controls (CONT, n = 15). During the first 14 wk of subsequent lactation (suckling and milking periods), MEL does yielded more milk than CONT does. Throughout subsequent lactation, milk composition was not affected by treatment. In MEL does, peripheral triiodothyronine levels peaked at 2 wk of lactation, remaining higher than in CONT does. The mean daily weight gain was higher in MEL compared with CONT kids and was also higher in males than females, and for males, was positively correlated with milk yield. The current data support our hypothesis that melatonin during the prepartum period is galactopoietic in suckling does.

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Section: Discussionsupporting

confidence: 90%

Melatonin administration during the dry period stimulates subsequent milk yield and weight gain of offspring in subtropical does kidding in summer

Avilés

Delgadillo

Flores

et al. 2019

Journal of Dairy Science

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“…In many previous studies, especially those conducted on ruminants, it is suggested that seasonal changes in IGF-1 concentrations are mainly driven by photoperiod (Dahl et al, 2000). In addition, it has been reported that the photoperiod has a significant effect on IGF-1 concentrations in goats (Flores et al, 2015(Flores et al, , 2018Hernández et al, 2016). Similarly, in a study carried out on male red deer, it was reported that melatonin implantation, which had "short-day effects", suppressed IGF-1 release (Suttie et al, 1992).…”

Section: Discussionmentioning

confidence: 98%

Relationship between insulin-like growth factor-1 (IGF-1) concentrations and body trait measurements and climatic factors in prepubertal goat kids

Pehlivan

2019

Arch. Anim. Breed.

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This study aimed to investigate relations between insulin-like growth factor-1 (IGF-1) concentrations and some body trait measurements (body weight, withers height, rump height, body length, chest depth, chest width, chest girth and cannon bone circumference) and climatic factors in prepubertal male and female White (75 % Saanen and 25 % Kilis goat) and Angora goat kids. For this purpose, blood samples were regularly taken from the vena jugularis, and body trait measurements were regularly carried out (every 15 d for 5 months) on each kid. The IGF-1 analysis on the blood serum was performed using the enzyme immunoassay (EIA) method. Climatic values and the length of the photoperiod were obtained from the Turkish State Meteorological Service for the experimental period, and the temperature–humidity index (THI) was calculated using these values. Statistical analysis showed that the IGF-1 concentrations were higher (P<0.05) in female White goat kids. Furthermore, differences in IGF-1 concentrations were found (P<0.05) between periods and between the gender groups for both the White and the Angora goat kids. Moreover, the difference between the IGF-1 concentrations between genders was higher (P<0.05) in White goat kids. Additionally, positive and significant correlations were found between IGF-1 concentrations and some body trait measurements in prepubertal kids, except for in female White goat kids. In summary, it was found that there was a significant relationship between IGF-1 concentrations and growth characteristics of the goat kids. Furthermore, IGF-1 concentrations in the goat kids were significantly influenced by climatic factors such as photoperiod, temperature and the temperature–humidity index, with the release of IGF-1 increasing due to increases in the photoperiod and the environmental temperature.

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“…También en vacas lactantes, la exposición a días largos incrementó la expresión de genes a leptina y el número de sus receptores en el tejido adiposo (Bernabucci et al, 2006). Otra posible explicación del efecto estimulatorio de los días largos sobre el peso corporal y la GDP de los machos cabríos del presente estudio es que es bien sabido en caprinos y en ovinos que la exposición a días largos artificiales incrementa las concentraciones de la hormona del crecimiento (GH) y del factor de crecimiento similar a insulina (IGF-1; Schanbacer y Crouse, 1980; Jin et al, 2013;Flores et al, 2018;Pehlivan, 2019). Por lo que es probable que en los machos del GDL del presente estudio haya existido un mayor estimulo del crecimiento mediado por dichos factores hormonales.…”

Section: Resultados Y Discusiónunclassified

“…Existen algunos trabajos que indican que, en pequeños rumiantes, la estimulación del peso y el crecimiento son asociados a elevadas concentraciones séricas del factor de crecimiento similar a insulina 1 (IGF-1; Pehlivan, 2019). Por ejemplo, en los cabritos del subtrópico sometidos a días largos artificiales desde el día 4 de vida se indujo mayores concentraciones plasmáticas de IGF-1 y de glucosa que en aquellos expuestos a días cortos decrecientes (Flores et al, 2018). Archer et al (2004), demostraron que en carneros adultos alimentados a libre acceso y animales con alimentación restringida mantenidos en un fotoperiodo de días largos artificiales tuvieron mayores niveles de glucosa en sangre a las 12 semanas del experimento, que los animales mantenidos en un fotoperiodo de días cortos.…”

Section: Introductionunclassified

En Los Cabritos Machos De Regiones Subtropicales, La Exposición a Días Largos Artificiales Estimula Una Mayor Tasa Crecimiento, Un Mejor Desarrollo E Incrementa La Glucemia

Delgadillo

Flores

Vielma

et al. 2022

Trop Subtrop Agroecosyst

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Background. Small ruminants from subtropical regions are sensitive to respond physiologically to natural photoperiodic changes. In some subtropical goat production systems as located in semi-arid areas of México, the main objective is to obtain in the shortest possible time, males with a suitable weight and body development for sale. Objective. The present study determines if the exposure to artificial long day photoperiod could promote a growth rate, body development and an increased glycemia in male goat kids compared with those under natural short days. Methodology. Starting on late September, 21 creole male goat kids (13 ± 0.1 week aged; mean ± SEM) were assigned to one of the two experimental groups. In the natural short days group, males remain under natural short days from autumn-winter (GDC, n = 10). In the artificial long days group, males were exposed to artificial photoperiod consisting in 16 h light and 8 h darkness (GDL, n = 11). The study lasted until the animals had 35 weeks of age. All animals were fed according their nutritional requirements. Results. During the study, the body weight of the GDL animals was higher than that of the GDCN males (P < 0.05). Due to this, the daily weight gain (GDP) obtained at 23 weeks of age was higher in the GDL males (165 g/day) than that registered in the GDC males (143 g/day; P <0.05). In some periods, the males of the GDL had higher body mass index (IMC) than the males of the GDC (P < 0.05). Thoracic perimeter at week 32 was greater in the GDL males than in the GDC males (P <0.05). The height at the withers did not reach significant differences in the comparisons between groups in the different weeks measured (P > 0.05). However, the total height at the withers gained during the study was significantly higher in the GDL males than in the GDC males (P < 0.01). Under fasting conditions, GDL males had higher levels (P < 0.05) of blood glucose in some periods than GDC males. Implications. The present study demonstrate that artificial long days stimulates growth in goats as occurs in other ruminants. Conclusion. Exposure of the male goat kids from subtropical regions to artificial long days, promotes a higher growth rate, better body development and increased glycemia compared to kids maintained under natural short-day photoperiods.

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Artificial long-day photoperiod in the subtropics increases body weight in goat kids born in the autumn

Cited by 5 publications

References 22 publications

Melatonin administration during the dry period stimulates subsequent milk yield and weight gain of offspring in subtropical does kidding in summer

Melatonin administration during the dry period stimulates subsequent milk yield and weight gain of offspring in subtropical does kidding in summer

Relationship between insulin-like growth factor-1 (IGF-1) concentrations and body trait measurements and climatic factors in prepubertal goat kids

En Los Cabritos Machos De Regiones Subtropicales, La Exposición a Días Largos Artificiales Estimula Una Mayor Tasa Crecimiento, Un Mejor Desarrollo E Incrementa La Glucemia

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