Colour Preference of Post Hatchling Hawksbill (Eretmochelys imbricata) and Green (Chelonia mydas) Sea Turtles in Captivity

Animals, Journal Year: 2025, Volume and Issue: 15(5), P. 628 - 628

Published: Feb. 21, 2025

Variations in the ecological roles of sea turtle species may lead to differentiations ocular design and visual sensitivity colour spectrum. Behavioural preference studies air water on hatchling post-hatchling green turtles found evidence a blue hue attractiveness when given choice between blue, red, yellow. This paper assessed compared preferences singular colours via behavioural responses eleven hawksbill twelve at 15 months age 22 age. Turtles were presented with one coloured balloon per day (purple (400–450 nm), dark (450–490 cyan (490–520 (520–560 yellow (560–590 orange (590–635 red (635–700 nm)). Time contact balloons beak behaviours exhibited by recorded. Hawksbill had greatest level interactions across both phases shorter wavelengths being 450 490 nm. Green consistently interaction longer nm) preference. The results this study support differences two co-occurring that reflect an adaptive for associated optimal foraging niche each.

Language: Английский

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Haematological and biochemical reference intervals for wild green turtles (Chelonia mydas): a Bayesian approach for small sample sizes

Conservation Physiology, Journal Year: 2022, Volume and Issue: 10(1)

Published: Jan. 1, 2022

Abstract Animal health is directly linked to population viability, which may be impacted by anthropogenic disturbances and diseases. Reference intervals (RIs) for haematology blood biochemistry are essential tools the assessment of animal health. However, establishing interpreting robust RIs threatened species often challenged small sample sizes. Bayesian predictive modelling well suited size limitations, accounting individual variation interactions between influencing variables. We aimed derive baseline green turtles (Chelonia mydas) across two foraging aggregations in North Queensland, Australia, using generalized linear mixed-effects models (n = 97). The predicted were contained within previously published values had narrower credible intervals. Most analytes did not vary significantly with ground (76%, 22/29), body mass (86%, 25/29) or curved carapace length (83%, 24/29). Length effects found eosinophils, heterophil:lymphocyte ratio, alkaline phosphatase, aspartate transaminase urea. Significant differences grounds albumin, cholesterol, potassium, total protein, triglycerides, uric acid calcium:phosphorus ratio. provide derived turtles, will helpful future assessments conservation efforts. Future RI studies on would benefit from adapting established veterinary biomedical standards.

Language: Английский

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Blood analyte reference intervals and correlations with trace elements of immature and adult Eastern Pacific green turtles (Chelonia mydas) in coastal lagoons of Baja California Sur, México

Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 195, P. 115547 - 115547

Published: Sept. 15, 2023

Language: Английский

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Hemogramas de ejemplares inmaduros de tortuga verde (Chelonia mydas) en el Golfo de Venezuela

Revista Científica de la Facultad de Ciencias Veterinarias, Journal Year: 2024, Volume and Issue: XXXIV(1), P. 1 - 6

Published: Jan. 29, 2024

Existen varios estudios sobre análisis hematológicos en tortugas marinas a nivel mundial que permiten evaluar el estado de salud sus poblaciones. El resultado estos constituye primer indicio alguna alteración fisiológica reptiles. Es importante destacar valores pueden variar por diversas razones como ubicación geográfica, especie, población, tamaño, entre otros. En Venezuela, la mayoría los perfiles sanguíneos se han dirigido individuos adultos. presente estudio tiene objetivo describir hemogramas ejemplares inmaduros tortuga verde (Chelonia mydas) capturados incidentalmente Golfo Venezuela puertos pesqueros artesanales. Se analizaron muestras sanguíneas 28 años 2009 – 2012. promedio del Largo Curvo Caparazón fue 36,06 ± 16,15 cm, considerándose su totalidad inmaduros. Las variables hematológicas registradas mostraron dentro intervalos referentes para especie según realizados zona; con excepción algunos presentaron hematocrito, RGR (106·μL-1), heterófilos, eosinófilos, monocitos y linfocitos superiores. Los resultan una herramienta diagnóstica rápida económica, permite evaluar, detectar descartar amplia variedad enfermedades. Estos esfuerzos permitirán diferenciar enfermos sanos cambios parámetros procesos fisiológicos, crecimiento, estatus hormonal estrés. función hallazgos patológicos poder definir estrategias rehabilitación seguimiento ejemplares.

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Future research avenues for the study of fibropapillomatosis in sea turtles

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: July 10, 2024

Fibropapillomatosis (FP) is a debilitating tumoral disease affecting sea turtles worldwide. While mainly afflicting immature individuals and potentially altering vital functions, the precise impact of this panzootic on turtle health survival remains unclear. Moreover, etiological factors implicated in FP emergence, development transmission are not yet definitively identified. Among them, an infection by spreading herpesvirus contamination pollutants (either organic trace elements) suspected. Here, we provide overview discoveries, knowledge propose hypotheses related to within five key research areas, i.e., virology studies, host genomic veterinary treatment assays. recommend urgent avenues develop at interface virology, epidemiology, ecotoxicology, oncology, physiology, immunology, cellular evolutionary biology, order characterize dynamics predict its consequences populations. Importantly, extending implementation strong collaborations between rehabilitation centers, field biologists laboratories large geographical scale required rapidly increase our work towards effective management.

Language: Английский

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Field‐based adipose tissue quantification in sea turtles using bioelectrical impedance spectroscopy validated with CT scans and deep learning

Ecology and Evolution, Journal Year: 2022, Volume and Issue: 12(12)

Published: Dec. 1, 2022

Loss of adipose tissue in vertebrate wildlife species is indicative decreased nutritional and health status linked to environmental stress diseases. Body condition indices (BCI) are commonly used ecological studies estimate mass across populations. However, these have poor predictive power, which poses the need for quantitative methods improved population assessments. Here, we calibrate bioelectrical impedance spectroscopy (BIS) as an alternative approach assessing studies. BIS a portable technology that can body composition from measurements widely humans. technique requires calibration using reference method. Using sea turtles model organisms, propose protocol computed tomography (CT) scans, with prediction equation being: (kg) = - (-0.03 [intercept] 0.29 * length

Language: Английский

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Clinical Pathology Reference Intervals for Juvenile Green (Chelonia mydas) and Hawksbill (Eretmochelys imbricata) Sea Turtles Captured in St. Kitts, 2004–2017

Journal of Herpetological Medicine and Surgery, Journal Year: 2023, Volume and Issue: 33(4)

Published: Sept. 11, 2023

Historically, juvenile and subadult green (Chelonia mydas) hawksbill (Eretmochelys imbricata) sea turtles have been observed in the waters surrounding St. Kitts, West Indies, year-round; however, no formal population or health assessment for these species cohorts Kitts has previously conducted. During study period (2004–2017), 211 (158 hawksbills 53 greens) were captured at 16 different capture sites Kitts. Once on shore restrained, morphometric measurements mass collected, untagged animals tagged, a was performed. Blood samples collected used to establish reference intervals hematological biochemical parameters. These reported make it possible incorporate monitoring programs infectious diseases identify any trends status. The morphometrics, mass, number of enable sound decision-making as relates conservation policy development implementation, which is especially important countries such Nevis where an open harvest still exists.

Language: Английский

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Haematologic and plasma biochemical reference intervals for flatback turtles Natator depressus

Endangered Species Research, Journal Year: 2023, Volume and Issue: 53, P. 181 - 198

Published: Dec. 8, 2023

Blood reference intervals (RIs) provide an indication of systemic health and are central to any baseline survey. RIs available for all sea turtle species, except the flatback Natator depressus . We developed first nesting foraging from a healthy population 211 individuals. found were generally similar other published RIs. For turtles, we detected significant differences in blood values (RVs) by life stage (nesting vs. foraging), sex, location, as well measurement technique (laboratory field). Clinically justified establishment separate turtles laboratory field techniques. Clinical application these individuals rehabilitation includes disease diagnosis, monitoring, development prognostic indicators. As regarded sentinels environmental health, data will also be useful monitoring future studies where changes may indicate environment decline.

Language: Английский

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Inter- and intraspecific blood-related biomarkers and chemical exposure in confined and free-living sea turtles.

Environmental Research, Journal Year: 2024, Volume and Issue: unknown, P. 120385 - 120385

Published: Nov. 1, 2024

Language: Английский

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Reference values for haemato-biochemical parameters of Caspian pond turtle (Mauremys caspica) in the Caspian Sea

BULGARIAN JOURNAL OF VETERINARY MEDICINE, Journal Year: 2024, Volume and Issue: 27(4), P. 554 - 563

Published: Jan. 1, 2024

The Caspian pond turtle, Mauremys caspica, is an important reptile species in the southern basin of Sea. Haematological indices and serum biochemistry can be utilised as valuable screening tools for health status many domestic wild animals. In this study, blood parameters were measured male female turtles to establish physiologic reference ranges selected haematological biochemical M. caspica. For purpose, samples collected from 60 (30 males 30 females) Significant differences observed some (i.e. haemoglobin haematocrit) alkaline phosphatase, aspartate aminotransferase, creatine kinase) between (P<0.05). However, further research necessary elucidate influence size, sex, season, habitat variations on haemato-biochemical turtle.

Language: Английский

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