Document
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funding4810
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type: BFO_0000020
type: Entity
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type: Grant
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label: Dirección General de Vida Silvestre; UC-MEXUS-CONACYT; Universidad Nacional Autónoma de México, UNAM; Laboratorio Ecología de la Salud; Posgrado en Ciencias del Mar y Limnología; Centro Ecológico Akumal; Facultad de Medicina; Ana Cecilia Negrete; Mauricio Comas; Centro de Investigación Aplicada en Ambiente y Salud; Comisión Nacional de Áreas Naturales Protegidas, CONANP; CICSAB; Facultad de Agronomia y Veterinaria and Facultad de Ciencias; Laboratorio de Inmunología; Facultad de Ciencias, Universidad de los Andes; CIACYT-UASLP; Facultad de Agronomía y Veterinaria; Universidad Autónoma de San Luis Potosí, UASLP; Secretaría de Medio Ambiente y Recursos Naturales, SEMARNAT, (SGPA/ DGVS/09454/14, SGPA/DGVS/05648/13, SGPA/DGVS/ 007459/18, SGPA/DGVS/02149/16, SGPA/DGVS/6729/19); Secretaría de Medio Ambiente y Recursos Naturales, SEMARNAT; FAI-UASLP, (C16-FAI-09-08.08, C18-AI-05.33.33); PRODEP-SEP, (DSA/103.5/16/10419); CONANP-SEMARNAT, (DRBCM/476/2019); Consejo Nacional de Humanidades, Ciencias y Tecnologías, Conahcyt, (423473); Consejo Nacional de Humanidades, Ciencias y Tecnologías, Conahcyt
funding vehicle for: Steroid Hormone Profiles and Demographic Data for Green Turtles (Chelonia mydas) Inhabiting the Mexican Caribbean Coast

Steroid Hormone Profiles and Demographic Data for Green Turtles (Chelonia mydas) Inhabiting the Mexican Caribbean Coast
related by: authorship_75807
type: Entity
type: Document
volume: 23
type: Continuant
e iscopus: 2-s2.0-85198330166
issue: 1
page start: 48
related by: authorship_75805
has funding vehicle: funding4810
type: Generically Dependent Continuant
most specific type: Article
crisid: 12606
type: Information Content Entity
type: Article
freetext keyword: biomarkers; Chelonia mydas; population ecology; sex steroids; thyroxine
doi: 10.2744/CCB-1604
estado: published
date time value: article date 12606
related by: authorship_76789
has publication venue: Chelonian Conservation and Biology
type: Thing
most specific type: Document
related by: authorship_75806
abstract: This study provides, for the first time, reference intervals of sex steroids and thyroxine concentrations from free-living green sea turtles (Chelonia mydas) inhabiting the coast of Quintana Roo, Mexico, determined in serum samples (n = 150) collected during 2013-2019 and characterized by endogenous (sex, size, and reproductive stages) and exogenous (foraging site) factors. A new demographic classification is proposed based on sea turtle size and habit preferences. Enzyme-linked immunosorbent assays were used to quantify serum estradiol, testosterone, and free thyroxine concentrations of green sea turtles captured in 7 foraging localities along the coast. The mean curved carapace length (CCL) of individuals (n = 150) was 66.60 ± 21.26 cm (range: 26.2-116.4 cm); immature turtles of undetermined sex were the most frequent age class (79.3%25). The mean steroid values were 0.33 ± 0.416 ng ml-1 (0.001-2.85 ng ml-1) for estradiol, 1.41 ± 1.83 ng ml-1 (0.015-9.21 ng ml-1) for testosterone, and 2.62 ± 1.89 μg 100 ml-1 (0.001-9.22 μg 100 ml-1) for thyroxine. The sex ratio estimated for adults (n = 31) was 1:3 (M:F) in deep near-shore habitats in the northern region. A bimodal distribution in the frequency of sea turtles grouped by size classes (CCL) was found, based on which a new theoretical size class classification is proposed for the Mexican Caribbean population. The 2 size classes were resident green turtles (26.2-80 cm CCL) and transient individuals (66.5-116.4 cm CCL), which also differed significantly in testosterone concentration, residents 1.6 ± 1.9 ng/ml (0.01-9.2 ng/ml) and transients 1.0 ± 1.3 ng/ml (0.08-5.1 ng/ml) (Mann-Whitney U-test = 1970, p = 0.04). Resident green turtles found along the central region of the Quintana Roo coast presented higher concentrations of testosterone than transients from the northern region (Kruskal-Wallis H-test = 6.8, p = 0.03). With the exception of testosterone, differences in steroid hormone levels between life-history stages,…
page end: 65

Continuant
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RDF description of Steroid Hormone Profiles and Demographic Data for Green Turtles (Chelonia mydas) Inhabiting the Mexican Caribbean Coast - http://orbis.uaslp.mx/vivo/individual/scopus12605
rights: termsOfUse
date: 2026-08-28T03:07:40
publisher: vivo
type: Document

Article
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Information Content Entity
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Chelonian Conservation and Biology
type: Document
type: Thing
type: Journal
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publication venue for: Steroid Hormone Profiles and Demographic Data for Green Turtles (Chelonia mydas) Inhabiting the Mexican Caribbean Coast
type: Continuant
type: Collection
type: Information Content Entity
type: Generically Dependent Continuant
type: Periodical