Effect of vitamin A on testicular growth and spermatogenesis of Awassi ram lambs

Sheep in the rainfed area of Iraq graze only on stubble for approximately five months a year without vitamin A (Vit. A) supplementation. It is expected that ram lambs raised during the same period may have low Vit. A, which influence testicular growth and spermatogenesis. A study was conducted to in...

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Published inInternational Refereed Research Journal - Dirasat (Jordan) Vol. 24; no. 1
Main Authors Al-Haboby, A.H, Abdulkareem, T.A, Alkass, J.E. (IPA Agricultural Research Center, Bghdad (Iraq))
Format Journal Article
LanguageEnglish
Published 01.01.1997
Subjects
AGNEAU
ALIMENTACION
ALIMENTATION
ANIMAL TISSUES
BLOOD PLASMA
BODY WEIGHT
CARENCE EN VITAMINE
CHEMICAL COMPOSITION
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
CORDERO
CRECIMIENTO
CROISSANCE
DEFICIENCIA DE VITAMINAS
ESPERMATOZOO
FEEDING
GRAIN
GRANOS
GROWTH
HORDEUM VULGARE
IRAK
IRAQ
LAMBS
LINEAR MODELS
MODELE LINEAIRE
MODELOS LINEALES
PAILLE
PAJA
PASTOREO ROTACIONAL
PATURAGE EN ROTATION
PESO CORPORAL
PLASMA SANGUIN
PLASMA SANGUINEO
POIDS CORPOREL
RETINOL
ROTATIONAL GRAZING
SPERMATOZOA
SPERMATOZOIDE
STRAW
TEJIDOS ANIMALES
TESTES
TESTICULE
TESTICULOS
TESTOSTERONAS
TESTOSTERONE
TISSU ANIMAL
VITAMIN DEFICIENCIES
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Summary:Sheep in the rainfed area of Iraq graze only on stubble for approximately five months a year without vitamin A (Vit. A) supplementation. It is expected that ram lambs raised during the same period may have low Vit. A, which influence testicular growth and spermatogenesis. A study was conducted to inspect the effect of Vit. A shortage in the testosterone levels and spermatogenesis in ram lambs. Fourteen ram lambs were used and feed on straw and barley grains for 16 weeks. A group of five ram lambs were either monthly treated with 50000 IU (T1), 100000 IU Vit. A (T2) or left as control (C, 4 ram lambs). Vit. A was not different among groups at week 0 and it was higher in T1 and T2, compared to C group at week 16. Treatment with Vit. A for 16 weeks had no influence on testicular weight, relative testicular weight and volume density for the seminiferous tubule and the interstitium. Spermatogenic cells RW were higher in T1 (0.55 +- 0.11 g/kg) and in T2 (0.77 +- 0.14 g/kg) compared to C group (0.32 +- 0.09 g/kg). Among all spermatogenic cells, sperm cell RW was highly greater in Vit. A treated groups whereas, spermatogonia, spermatocytes and spermatids RW tended to be higher after Vit. A treatment
Bibliography:L52
1997000072
L53
ISSN:1026-3764