Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.theriogenology.2018.07.029 |
Scrotum bipartite in sheep as a parameter indicative of adaptation to semi-arid climates: A thermographic and reproductive study | |
Rocha, Ediane Freitas1; Francelino Dias, Romulo Freitas1; de Souza, Joyce Galvdo1; Soares dos Santos, Jose Romulo1; Silva, Gustavo de Assis1; Barbosa Roberto, Joao Vinicius1; Bakke, Olaf Andreas1; de Souza Araujo, Norma Lucia2; de Souza, Bonifacio Benicio1; Ayres de Menezes, Danilo Jose3 | |
通讯作者 | Rocha, Ediane Freitas |
来源期刊 | THERIOGENOLOGY |
ISSN | 0093-691X |
EISSN | 1879-3231 |
出版年 | 2018 |
卷号 | 121页码:91-96 |
英文摘要 | With the objective of assessing the influence of scrotum bipartition on scrotum-testiclar thermoregulation and semen quality in sheep native to a semiarid region, 14 adult crossbred rams were placed into groups, GI (7 with bipartition in the scrotum) and GII (7 without bipartition). Images were taken of the caudal scrotum surface using a Fluke (Ti25 (R)) thermographic camera, for temperature analysis. Two semen collections were made, at an eight-day interval, by electroejaculation, to analyze macroscopic and microscopic parameters. It was observed that the surface temperatures of the proximal, medial and distal regions of the testicle and the epididymis tail did not present significant statistical difference (p > 0.05) between the groups. The GI showed a great ability to regulate the temperature in the tail region of the epididymis (p = 0.062), location of the bipartition, and the difference in temperature between the body surface and the epididymis tail was 0.54 degrees C much lower than the G2. Although no significant statistical difference (p > 0.05) was observed, the animals with bipartition presented higher means for body surface temperature, showing greater efficiency in heat dissipation and indicating that these animals used peripheral vasodilation on a larger scale to eliminate excess heat and thus had a lower energy expenditure. The semen parameters studied in both groups were within the desirable values for the species, with no differences between the groups (p > 0.05). Higher scrotum testiclar values were observed (scrotum circumference GI = 30.40 cm +/- 0.53 and GII = 28.42 +/- 1.13 cm, testicle length, right and left, respectively GI = 8.14 +/- 0.90 cm, 8.00 +/- 0.00 cm and GII = 7.28 +/- 0.04 cm, 7.28 +/- 0.48 cm) and bodyweight (GI = 44.57 +/- 5.25 Kg and GII = 39.85 +/- 1.57 Kg) in rams with scrotum bipartition (p > 0.05). It is concluded that scrotum bipartite in rams was shown to be an evolutionary indicator showing that animals with this characteristic dissipate heat more efficiently, have bigger scrotum-testicle biometrical parameters and heavier body weight. However, as the rams with scrotum bipartite presented division of less than 50% of the scrotum length, this degree did not influence the scrotum surface temperature and semen quality, as has been observed in goats with the same characteristic. (C) 2018 Elsevier Inc. All rights reserved. |
英文关键词 | Reproduction Morphology Temperature Ruminants Semi-arid |
类型 | Article |
语种 | 英语 |
国家 | Brazil |
收录类别 | SCI-E |
WOS记录号 | WOS:000447478600014 |
WOS关键词 | HEAT-STRESS ; SEMEN ; INSULATION ; GOATS ; TEMPERATURES ; DEGENERATION ; NORTHEAST ; QUALITY ; BRAZIL |
WOS类目 | Reproductive Biology ; Veterinary Sciences |
WOS研究方向 | Reproductive Biology ; Veterinary Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/213468 |
作者单位 | 1.Univ Fed Campina Grande, Patos de Minas, PB, Brazil; 2.Univ Fed Paraiba, Areia, PB, Brazil; 3.Univ Fed Rio Grande do Norte, Natal, RN, Brazil |
推荐引用方式 GB/T 7714 | Rocha, Ediane Freitas,Francelino Dias, Romulo Freitas,de Souza, Joyce Galvdo,et al. Scrotum bipartite in sheep as a parameter indicative of adaptation to semi-arid climates: A thermographic and reproductive study[J],2018,121:91-96. |
APA | Rocha, Ediane Freitas.,Francelino Dias, Romulo Freitas.,de Souza, Joyce Galvdo.,Soares dos Santos, Jose Romulo.,Silva, Gustavo de Assis.,...&Ayres de Menezes, Danilo Jose.(2018).Scrotum bipartite in sheep as a parameter indicative of adaptation to semi-arid climates: A thermographic and reproductive study.THERIOGENOLOGY,121,91-96. |
MLA | Rocha, Ediane Freitas,et al."Scrotum bipartite in sheep as a parameter indicative of adaptation to semi-arid climates: A thermographic and reproductive study".THERIOGENOLOGY 121(2018):91-96. |
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