Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert

This study was conducted to assess comparative annual and seasonal patterns described in morphometric parameters, sexual and thyroid activities in indigenous bucks native to Sahara Desert. Seven adult bucks were used to establish seasonal patterns of body weight, testicular volume, plasma testoster...

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Autores principales:	Nadia CHERGUI, Nouria BOUKENAOUI-FERROUK, Salima CHARALLAH-CHERIF, Farida KHAMMAR, Zaina AMIRAT, Pierre MORMEDE
Formato:	article
Lenguaje:	EN
Publicado:	University of Kafkas 2021
Materias:	buck sahara desert seasonal variations testicular activity thyroid activity Veterinary medicine SF600-1100
Acceso en línea:	https://doaj.org/article/29ddfb3c3f014e7b9a0aa49dd4d0000e
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spelling	oai:doaj.org-article:29ddfb3c3f014e7b9a0aa49dd4d0000e2021-12-05T08:17:39ZAnnual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert10.9775/kvfd.2021.261941300-60451309-2251https://doaj.org/article/29ddfb3c3f014e7b9a0aa49dd4d0000e2021-11-01T00:00:00Zhttp://vetdergikafkas.org/uploads/pdf/pdf_KVFD_2858.pdfhttps://doaj.org/toc/1300-6045https://doaj.org/toc/1309-2251This study was conducted to assess comparative annual and seasonal patterns described in morphometric parameters, sexual and thyroid activities in indigenous bucks native to Sahara Desert. Seven adult bucks were used to establish seasonal patterns of body weight, testicular volume, plasma testosterone concentration measured by radioimmunoassay and pituitary-thyroid axis activity estimated by plasma concentrations of TSH, FT3 and FT4 measured by enzyme-linked fluorescent assay. The results showed monthly and seasonal variations characterized by a minimum in January for body weight, from December to February for testicular volume, followed by plasma testosterone concentration in March; they progressively increased to their respective maxima reached in July, August and September when ambient temperature and photoperiod were the highest. In October, there was a rapid fall in testosterone levels, preceding that of body weight and testicular volume (P<0.001). Plasma TSH showed no significant variations, while the monthly rhythms of FT4 and particularly FT3 (P<0.001) were inverted to the sexual cycle, since the highest values occurred in winter (January) and the lowest in summer (July). These results suggest morphometric and hormonal interrelations in this indigenous seasonal breeder goat in order to survive and reproduce in its natural arid environment.Nadia CHERGUINouria BOUKENAOUI-FERROUKSalima CHARALLAH-CHERIFFarida KHAMMARZaina AMIRATPierre MORMEDEUniversity of Kafkasarticlebucksahara desertseasonal variationstesticular activitythyroid activityVeterinary medicineSF600-1100ENKafkas Universitesi Veteriner Fakultesi Dergisi, Vol 27, Iss 6, Pp 725-731 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	buck sahara desert seasonal variations testicular activity thyroid activity Veterinary medicine SF600-1100
spellingShingle	buck sahara desert seasonal variations testicular activity thyroid activity Veterinary medicine SF600-1100 Nadia CHERGUI Nouria BOUKENAOUI-FERROUK Salima CHARALLAH-CHERIF Farida KHAMMAR Zaina AMIRAT Pierre MORMEDE Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert
description	This study was conducted to assess comparative annual and seasonal patterns described in morphometric parameters, sexual and thyroid activities in indigenous bucks native to Sahara Desert. Seven adult bucks were used to establish seasonal patterns of body weight, testicular volume, plasma testosterone concentration measured by radioimmunoassay and pituitary-thyroid axis activity estimated by plasma concentrations of TSH, FT3 and FT4 measured by enzyme-linked fluorescent assay. The results showed monthly and seasonal variations characterized by a minimum in January for body weight, from December to February for testicular volume, followed by plasma testosterone concentration in March; they progressively increased to their respective maxima reached in July, August and September when ambient temperature and photoperiod were the highest. In October, there was a rapid fall in testosterone levels, preceding that of body weight and testicular volume (P<0.001). Plasma TSH showed no significant variations, while the monthly rhythms of FT4 and particularly FT3 (P<0.001) were inverted to the sexual cycle, since the highest values occurred in winter (January) and the lowest in summer (July). These results suggest morphometric and hormonal interrelations in this indigenous seasonal breeder goat in order to survive and reproduce in its natural arid environment.
format	article
author	Nadia CHERGUI Nouria BOUKENAOUI-FERROUK Salima CHARALLAH-CHERIF Farida KHAMMAR Zaina AMIRAT Pierre MORMEDE
author_facet	Nadia CHERGUI Nouria BOUKENAOUI-FERROUK Salima CHARALLAH-CHERIF Farida KHAMMAR Zaina AMIRAT Pierre MORMEDE
author_sort	Nadia CHERGUI
title	Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert
title_short	Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert
title_full	Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert
title_fullStr	Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert
title_full_unstemmed	Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert
title_sort	annual and seasonal variations of testicular and pituitary-thyroid axis activities in bucks native to sahara desert
publisher	University of Kafkas
publishDate	2021
url	https://doaj.org/article/29ddfb3c3f014e7b9a0aa49dd4d0000e
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Annual and Seasonal Variations of Testicular and Pituitary-Thyroid Axis Activities in Bucks Native to Sahara Desert

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