Effect of pinealectomy on prolactin, testosterone and luteinizing hormone concentration in plasma of bull calves exposed to 8 or 16 hours of light per day

Pineal tissue was removed from eight 6-wk-old bull calves (PX), whereas eight similar calves received sham pinealectomies (SPX). Before and after surgery, calves received 8 h of light (L):16 h of darkness (D) daily until 20 wk of age (wk 0 of experiment), at which time eight calves (four PX and four...

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Veröffentlicht in:	Journal of animal science 1988-02, Vol.66 (2), p.464-469
Hauptverfasser:	Stanisiewski, E.P, Ames, N.K, Chapin, L.T, Blaze, C.A, Tucker, H.A
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals BLOOD PLASMA BULLS CALVES Cattle - blood EPIPHYSE FOTOPERIODISMO GLANDULA PINEAL Light Luteinizing Hormone - blood Male OPERACIONES QUIRURGICAS OPERATION CHIRURGICALE Periodicity PHOTOPERIODICITE PHOTOPERIODICITY PINEAL BODY Pineal Gland - physiology PLASMA SANGUIN PLASMA SANGUINEO PROLACTIN Prolactin - blood PROLACTINA PROLACTINE SURGICAL OPERATIONS TAUREAU TERNERO TESTOSTERONAS TESTOSTERONE Testosterone - blood TORO VEAU
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