| Autor: |
Paz MM; Unidad Ejecutora Lillo (UEL)-CONICET-Fundación Miguel Lillo, Instituto de Herpetología, Miguel Lillo 251, Tucumán, 4000, Argentina. marcosmaxipaz@gmail.com., García NE; Unidad Ejecutora Lillo (UEL)-CONICET-Fundación Miguel Lillo, Instituto de Herpetología, Miguel Lillo 251, Tucumán, 4000, Argentina., Semhan RV; Unidad Ejecutora Lillo (UEL)-CONICET-Fundación Miguel Lillo, Instituto de Herpetología, Miguel Lillo 251, Tucumán, 4000, Argentina., Lobo FJ; Museo de Ciencias Naturales, Instituto de Bio y Geociencias del NOA (IBIGEO)-CONICET, Mendoza 2, Salta, 4400, Argentina., Abdala CS; Unidad Ejecutora Lillo (UEL)-CONICET-Fundación Miguel Lillo, Instituto de Herpetología, Miguel Lillo 251, Tucumán, 4000, Argentina. |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology [J Comp Physiol B] 2019 Oct; Vol. 189 (5), pp. 595-609. Date of Electronic Publication: 2019 Jul 06. |
| DOI: |
10.1007/s00360-019-01226-8 |
| Abstrakt: |
In reptiles, many lipid reserve structures were recognized, and different patterns of storage and utilization of lipids have been identified. In this study, a population of Liolaemus koslowskyi was studied to analyze the diversity and functioning of the lipid reserve structures. The specific objectives were to identify the main lipid reserve structures, and to describe their seasonal patterns; to study sexual and seasonal variations of the reserve structures; and to analyze the relation between seasonal patterns of such reserves with the sexual cycle and other biological aspects. Individuals of both sexes collected at five different times of the year were analyzed. The abdominal fat bodies, livers, tails, fat deposits of the lateral folds of the neck, the fat bodies of the axillary region and gonads were weighted. The fat content of livers, tails and neck fat reserves were determined through the extraction in a Soxhlet device. The volume of the ovaries, oviductal oocytes and testicles, and the average surface and thickness of the epididymides were estimated. The abdominal fat bodies and the tail-extracted fats were the main lipid reserves. In general, females showed higher lipid contents, and significant seasonal variations in weight and lipid content in both sex were found, while seasonal variations in the liver fresh weight and liver fat content were found only in males. The axillar and neck fats deposits probably function as auxiliary reserves, and the caudal autotomy did not significantly affect tail fat content. The sexual cycles were synchronic in both sexes. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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