A genetic analysis of the concentrations of blood metabolites and their relationships with age and liveweight gain in young British Friesian bulls

Rowlands, G.J.; Manston, R.; Bunch, Kathryn; Brookes, Paul

doi:10.1016/0301-6226(83)90002-7

Cited by 22 publications

(25 citation statements)

References 27 publications

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“…Mots cl6s: GRF, hormone de croissance, sperme, taureaux laitiers (Tilakaratne et al 1980; Rowlands et al 1983;Sejrsen et al 1984 (Klindt 1988;Kazmer et al 1991). In addition, Lovendahl et al (1991) …”

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confidence: 99%

Serum growth hormone in and semen characteristics of proven AI dairy sires after administration of growth hormone-releasing factor

Kazmer¹,

Zinn²,

Rycroft³

et al. 1992

Can. J. Anim. Sci.

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. 1992. Serum growth hormone in and semen characteristics of proven AI dairy sires after administration of growth hormone-releasing factor. Can. J. ; A growth hormone-releasing factor (GRF) analog was administered at 71,22 and 33 pg 100 kg -' to proven dairy sires of varying genetic merit for production traits. Administration of GRF increased mean GH concentrations, but the area under the response curve was not different among the three dosages, nor were there differences between genetic groups overall. However, the maximum GH concentration following the administration of 11 p.g 100 kg-' was greater among superior sires. None of semen motility, sperm concentration or total sperm were affected through an entire spermatogonic cycle.

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mentioning

confidence: 99%

Serum growth hormone in and semen characteristics of proven AI dairy sires after administration of growth hormone-releasing factor

Kazmer¹,

Zinn²,

Rycroft³

et al. 1992

Can. J. Anim. Sci.

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“…Es así que estos cambios han sido asociados a la época del año y a la edad de los animales (Rowlands et al, 1983;Siga et al, 1985). Se conoce que los animales en el invierno aumentan su producción de hormonas tiroideas, lo que se traduce en cambios asociados al gasto cardíaco para fines de mantenimiento de la temperatura y aumento de la producción energética, y, asimismo, asociado a una disminución relativa de las pasturas (Ganong, 2010).…”

Section: Resultados Y Discusión Frecuencia Cardíacaunclassified

Parámetros Electrocardiográficos en Terneros Holstein Criados en la Altura y a Nivel del Mar

Begazo

Portocarrero

Dávila

2017

Rev. investig. vet. Perú

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RESUMENEl propósito del estudio fue comparar los parámetros electrocardiográficos de terneros Holstein, clínicamente sanos, criados en la altura (3827 msnm) y a nivel del mar (175 msnm). Se evaluó la frecuencia, ritmo, tamaño y morfología de las ondas, segmentos e intervalos y el eje cardíaco. Los exámenes se realizaron en posición erguida, a una amplitud de 1 mV/cm y a velocidad de 25 mm/seg, utilizándose las derivaciones bipolares (I, II, III) y unipolares (avL, avR y avF). Los resultados reflejaron que la frecuencia cardíaca en la altura y a nivel del mar fue de 87.33 ± 9.77 y de 127.40 ± 7.52 latidos por minuto, respectivamente. El ritmo cardíaco en la altura y a nivel del mar tuvo como característica un ritmo regular sinusal normal. El eje cardíaco en la altura fue de -120.1 ± 7.30° y a nivel del mar de 63.7 ± 3.02°. Se concluye que existen diferencias estadísticas en frecuencia cardíaca, tamaño y morfología de las ondas, intervalos, segmentos y el eje cardíaco en los terneros de la altura y a nivel del mar (p<0.05), producto de la adaptación fisiológica a niveles altitudinales mayores.Palabras clave: parámetros electrocardiográficos, eje cardíaco, terneros ABSTRACTThe aim of the study was to compare the electrocardiographic parameters of clinically healthy Holstein calves raised in the high altitude (3827 m) and at sea level (175 m). Parameters under evaluation were rate, rhythm, size and morphology of the waves, segments and intervals and cardiac axis. The tests were performed in an upright position at an amplitude of 1 mV/cm and speed of 25 mm/sec, using the bipolar (I, II, III) and unipolar (AVL, AVR, and aVF) leads. The results showed that heart rate was 87.33 ± 9.77

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“…No genetic differences in Cu absorption have been reported in cattle (Rowlands et al, 1983) even if selected breeds (including the Simmenthal breed) appear to excrete significantly more Cu than others, which might support a possible indication for a higher requirement for Cu in some groups (Gooneratne et al, 1988).…”

Section: Introductionmentioning

confidence: 93%

Accumulation of copper and other metal ions, and metallothionein I/II expression in the bovine brain as a function of aging

Zatta

Drago

Zambenedetti

et al. 2008

Journal of Chemical Neuroanatomy

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A genetic analysis of the concentrations of blood metabolites and their relationships with age and liveweight gain in young British Friesian bulls

Cited by 22 publications

References 27 publications

Serum growth hormone in and semen characteristics of proven AI dairy sires after administration of growth hormone-releasing factor

Serum growth hormone in and semen characteristics of proven AI dairy sires after administration of growth hormone-releasing factor

Parámetros Electrocardiográficos en Terneros Holstein Criados en la Altura y a Nivel del Mar

Accumulation of copper and other metal ions, and metallothionein I/II expression in the bovine brain as a function of aging

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