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48 results for “Chelonia mydas”
FIGURE 3. Hyachelia tortugae. AMNH 12533-11008-008, male 7.91 in New Records of Hyachelia tortugae Barnard, 1967, and H. lowryi Serejo and Sittrop, 2009 (Amphipoda: Gammaridea: Hyalidae), from Palmyra Atoll National Wildlife Refuge: Cooccurrence on Pacific Green Turtles (Chelonia mydas).
FIGURE 3. Hyachelia tortugae. AMNH 12533-11008-008, male 7.91 mm. A. Gnathopod 1 (outside lateral view). B. Gnathopod 2 (inside lateral view).
FIGURE 4. Hyachelia tortugae. AMNH 12533-11008-057, male 7.98 in New Records of Hyachelia tortugae Barnard, 1967, and H. lowryi Serejo and Sittrop, 2009 (Amphipoda: Gammaridea: Hyalidae), from Palmyra Atoll National Wildlife Refuge: Cooccurrence on Pacific Green Turtles (Chelonia mydas).
FIGURE 4. Hyachelia tortugae. AMNH 12533-11008-057, male 7.98 mm. A. Pereopod 6. B. Pereopod 7. C. Maxilliped. AMNH 12533-08013-277, female 5.30 mm. D. Uropod 1. E. Uropod 2.
Data and scripts for: Satellite-tracking reveals sex-specific migration distance in green turtles (Chelonia mydas)
<p>Data derivates and analysis scripts (in R) used for the paper "Satellite-tracking reveals sex-specific migration distance in green turtles (<em>Chelonia mydas</em>)", published in Biology Letters, on analyzing male and female green turtle movements in West Africa.</p>
Figure 2 in Sex ratio estimations of Chelonia mydas hatchlings at Samandağ Beach, Turkey
Figure 2. Frequency of incubation durations in examined nests at Samandağ Beach.
Figure 1 in Sex ratio estimations of Chelonia mydas hatchlings at Samandağ Beach, Turkey
Figure 1. Map showing study area of Samandağ Beach.
Figure 2 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 2. Pimelia sp. larva.
Figure 5 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 5. Muscidae pupae.
Figure 4 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 4. Elater sp. larva.
Figure 6 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 6. Enchytraeidae (Oligochaeta) sample.
Figure 7 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 7. Myrmeleontidae.
Figure 3 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 3. Elater sp. larva in the egg.
Table 1 in Of turtles and trees: Nutritional analysis of tree heliotrope (Heliotropium foertherianum) leaves consumed by green turtles (Chelonia mydas) in Hawaiʻi
<p>Table 1. Results of chemical analysis of senescent leaves of <i>Heliotropium foertherianum</i> from Kona, HI. All values are mean values. C:N = carbon:nitrogen ratio, ADF = acid detergent fiber, NDF = neutral detergent fiber. SE represents the standard error of the mean. Values of carbon, nitrogen, ash, protein, fat, fiber, lignin, energy and phenol are based on dry matter. n=number of sub-samples.</p><table><tbody><tr><th></th><th><b>% Dry Matter</b></th><th><b>% Nitrogen</b></th><th><b>C:N</b></th><th><b>% Ash</b></th><th><b>% Crude</b></th><th><b>% Crude</b></th><th><b>% ADF</b></th><th><b>% NDF</b></th><th><b>% Lignin</b></th><th><b>Energy, Kcal/kg</b></th><th><b>Total Phenol, mg/g</b></th></tr></tbody><tbody><tr><th></th><td><b>(SE)</b></td><td><b>(SE)</b></td><td><b>(SE)</b></td><td><b>(SE)</b></td><td><b>Protein</b></td><td><b>Fat</b></td><td><b>(SE)</b></td><td><b>(SE)</b></td><td><b>(SE)</b></td><td><b>(SE)</b></td><td><b>(SE)</b></td></tr><tr><th>Oct 2016</th><td>97.38</td><td>0.65</td><td>46.03</td><td>2.46</td><td>5.25</td><td>2.43</td><td>31.26</td><td>40.70</td><td>13.91</td><td>4556.4</td><td>584</td></tr><tr><th></th><td>(0.29)</td><td>(0.003)</td><td>(1.58)</td><td>(0.07)</td><td></td><td></td><td>(0.26)</td><td>(0.21)</td><td>(0.22)</td><td>(42.0)</td><td>(6.7)</td></tr><tr><th></th><td>n=2</td><td>n=10</td><td>n=10</td><td>n=2</td><td>n=1</td><td>n=1</td><td>n=2</td><td>n=2</td><td>n=2</td><td>n=3</td><td>n=3</td></tr><tr><th>Jan 2017</th><td>96.49</td><td>0.64</td><td>48.94</td><td>2.48</td><td>5.65</td><td>2.00</td><td>31.82</td><td>42.35</td><td>13.60</td><td>4649.8</td><td>573</td></tr><tr><th></th><td>(0.05)</td><td>(0.35)</td><td>(1.56)</td><td>(0.04)</td><td></td><td></td><td>(0.22)</td><td>(0.47)</td><td>(0.42)</td><td>(32.9)</td><td>(10.5)</td></tr><tr><th></th><td>n=3</td><td>n=10</td><td>n=10</td><td>n=3</td><td>n=1</td><td>n=1</td><td>n=2</td><td>n=2</td><td>n=2</td><td>n=3</td><td>n=3</td></tr></tbody></table>
FIGURE 2 in New Records of Hyachelia tortugae Barnard, 1967, and H. lowryi Serejo and Sittrop, 2009 (Amphipoda: Gammaridea: Hyalidae), from Palmyra Atoll National Wildlife Refuge: Cooccurrence on Pacific Green Turtles (Chelonia mydas).
FIGURE 2. Map of Pacific Ocean showing location of Palmyra Atoll.
Data from: Energy expenditure of adult green turtles (Chelonia mydas) at their foraging grounds and during simulated oceanic migration
Measuring the energy requirements of animals under natural conditions and determining how acquired energy is allocated to specific activities is a central theme in ecophysiology. Turtle reproductive output is fundamentally linked with their energy balance so a detailed understanding of marine turtle energy requirements during the different phases of their life cycle at sea is essential for their conservation. We used the non-invasive accelerometry technique to investigate the activity patterns and energy expenditure (EE) of adult green turtles (Chelonia mydas) foraging year-round at a seagrass meadow in Mayotte (n = 13) and during simulated oceanic migration (displacement from the nesting beach) off Mohéli (n = 1), in the south-western Indian Ocean. At the foraging site, turtles divided their days between foraging benthically on the shallow seagrass meadow during daylight hours and resting at greater depth on the inner side of the reef slope at night. Estimated oxygen consumption rates (sinline image) and daily energy expenditures (DEE) at the foraging site were low (sinline image during the day was 1·6 and 1·9 times the respective resting rate at night during the austral summer and winter, respectively), which is consistent with the requirement to build up substantial energy reserves at the foraging site, to sustain the energy-demanding breeding migration and reproduction. Dive duration (but not dive depth) at the foraging site shifted significantly with season (dive duration increased with declining water temperatures, Tw), while overall activity levels remained unchanged. In parallel with a significant seasonal decline in Tw (from 28·9 ± 0·1 °C to 25·3 ± 0·4 °C), there was a moderate (˜19%) but significant decline in DEE of turtles during the austral winter (901 ± 111 kJ day−1), when compared with the austral summer (1117 ± 66 kJ day−1). By contrast, the turtle moved continuously during simulated oceanic migration, conducting short/shallow dives in the day, which (predominately at night) were interspersed with longer and deeper 'pelagic' dives. Estimated oxygen consumption rates during a simulated migration (1·25 ± 0·16 mL O2 min−1 kg−0·83) were found to be significantly increased over the foraging condition, equal to ˜3 times the resting rate at night (0·42 ± 0·02 mL O2 min−1 kg−0·83), and daily energy expenditure amounted to 2327 ± 292 kJ day−1, underlining the tremendous energetic effort associated with breeding migration. Our study indicates that the accelerometry technique provides a new and promising opportunity to study marine turtle energy relations in great detail and under natural conditions.
Relocations for: Satellite-tracking reveals sex-specific migration distance in green turtles (Chelonia mydas)
<p>Relocations from 25 green turtles, tracked in West Africa in 2021.</p>
Figure 2 in Species assemblage and distribution of turtle barnacles (Cirripedia: Coronuloidea) on foraging green sea turtles (Chelonia mydas) in the Persian Gulf
Figure 2. Distribution of Chelonibia testudinaria and Platylepas hexastylos on the carapace (a) and plastron (b) of foraging green sea turtles (Chelonia mydas) in southern Qeshm Island (eastern Persian Gulf). letters on the scutes of the top-left picture show: c) central scutes; l) lateral scutes; n) nuchal scute; s) supracaudal scutes; m) marginal scutes (all unmarked scutes between nuchal and supracaudals are marginal scutes). Letters on the scutes of the below-right picture show: i) intergular scute; g) gular scute; h) humeral scute; p) pectoral scute; ab) abdominal scute; f) femoral scute; a) anal scute; in) inframarginal scutes.
Figure 1 in Species assemblage and distribution of turtle barnacles (Cirripedia: Coronuloidea) on foraging green sea turtles (Chelonia mydas) in the Persian Gulf
Figure 1. Sampling site of green sea turtles (Chelonia mydas) on the southern coast of Qeshm Island, the Persian Gulf.
Figure 2 in Growth rates of wild green turtles, Chelonia mydas, at a temperate foraging habitat in the northern Gulf of Mexico: assessing short-term effects of cold-stunning on growth
Figure 2. Graphical summary of generalized additive model fit for somatic growth, in cm straight carapace length (SCL)/year, for St Joseph Bay, Florida conditioned on two growthrate predictors: (A,B) number of previous cold-stunning events and mean carapace length or (C,D) number of previous cold-stunning events and mean condition index. The response variable (growth rate as cm SCL/year) is shown on the y-axis in each panel as a centred scale to ensure valid point-wise 95% credible intervals and comparison between the covariates across the four panels. The width of the mean factor response (number of previous cold-stunning events: A,C) is proportional to sample size with the 95% confidence interval shown by cross bars. Solid curves in B and D are cubic smoothing spline fits for these continuous covariates conditioned on the cofactor (previous cold-stunnings) while the dotted curves in the same panels are point-wise 95% confidence curves around the fits. The data distribution within (B) and (D) is shown by the vertical bars on the topside of the lower x-axis. For instance, (D) shows that most of the data for the mean condition index occur from 1.1 to 1.5 with some extreme outliers. While not statistically significant, it was apparent that expected growth rates were lower for turtles that were exposed to one or two cold-stunning events (A,C). Neither mean size (B) nor mean condition (D) were significant growth-rate predictors for this sample. The sample size (n551) is too small for this study to draw any robust conclusions about the effect of cold-stunning events on juvenile green turtle somatic growth.
Figure 1 in Growth rates of wild green turtles, Chelonia mydas, at a temperate foraging habitat in the northern Gulf of Mexico: assessing short-term effects of cold-stunning on growth
Figure 1. Location of St Joseph Bay in the northern Gulf of Mexico. Major set-netting sites (filled circles) used throughout the project and location of cold stun strandings (solid arrows) during 2001 and 2003. Site of release (indicated by star) into the Gulf of Mexico after rehabilitation, and the possible path (thin arrows) taken while returning to the southern end of St Joseph Bay.
Figure 4 in No rest for the weary: restricted resting behaviour of green turtles (Chelonia mydas) at a deep-neritic foraging area influences expression of life history traits
Figure 4. Depth versus duration of resting bouts for (a) each individual turtle (n = 12), and (b) average dive depth vs. dive duration for all resting dives by each individual turtle ± 1 standard deviation (R2 = 0.36).
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