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opencc-by-4.0Dec 2021View details →

Fig. 2 in The Northernmost Record Of The Loggerhead Sea Turtle, Caretta Caretta (Testudines, Cheloniidae), In The Black Sea, With The Review Of The Species Occurrence In The Region

Fig. 2. Frequency of records of the loggerhead sea turtle in the Black Sea by decade.

opencc-by-4.0Dec 2021View details →

Fig. 1 in The Northernmost Record Of The Loggerhead Sea Turtle, Caretta Caretta (Testudines, Cheloniidae), In The Black Sea, With The Review Of The Species Occurrence In The Region

Fig. 1. Records of the loggerhead sea turtle in the Black Sea.

opencc-by-4.0Dec 2022View details →

Figure 5 in Reproductive and ecological similarity between Caretta caretta (Linnaeus, 1758) and Eretmochelys imbricata (Linnaeus, 1766) in southern Bahia (Brazil)

Figure 5. Comparison between the number of hatchlings of both species.

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.

opencc-zeroSep 2020View details →

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Data from: Female loggerhead sea turtles (Caretta caretta L.) rarely remate during nesting season

The goal of this study was to assess the consequences of single versus multiple paternity by identifying paternity of clutches per female to identify if there were detectable costs or benefits. Multiple mating can occur when the benefits of mating outweigh the costs, but if costs and benefits are equal, no pattern is expected. Previous research on loggerhead sea turtle (Caretta caretta) populations found male-biased breeding sex ratios and multiple mating by many females nesting in southwestern Florida. A sample of nesting loggerhead females who laid more than one nest over the course of the season and a subset of their hatchlings were examined from 36 clutches in 2016 on Sanibel Island, Florida. Males that fathered hatchlings in the first clutch sampled were identified in subsequent clutches. Interestingly, 75% of the females analyzed had mated singly. No male was represented in more than one female's clutches. The results suggest that females likely mate at the beginning of the season and use stored sperm for multiple clutches. Evidence for mating between laying events was limited. There was no consistent pattern across the subsequent multiple paternity clutches, suggesting benefits to loggerhead females likely equal their costs and subsequent mating is likely determined by female preference.

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Data from: Loggerhead sea turtle embryos (Caretta caretta) regulate expression of stress-response and developmental genes when exposed to a biologically realistic heat stress

Oviparous reptile embryos are expected to breach their critical thermal maxima if temperatures reach those predicted under current climate change models due to the lack the maternal buffering processes and parental care. Heat shock proteins (HSPs) are integral in the molecular response to thermal stress, and their expression is heritable, but the roles of other candidate families such as the heat shock factors (HSFs) have not been determined in reptiles. Here we subject embryonic sea turtles (Caretta caretta) to a biologically realistic thermal stress and employ de novo transcriptomic profiling of brain tissue to investigate the underlying molecular response. From a reference transcriptome of 302,293 transcripts, 179 were identified as differentially expressed between treatments. As anticipated, genes enriched in the heat shock treatment were primarily associated with the Hsp families, or were genes whose products play similar protein editing and chaperone functions (e.g. bag3, MYOC and serpinh1). Unexpectedly, genes encoding the HSFs were not significantly upregulated under thermal stress, indicating their presence in unstressed cells in an inactive state. Genes that were downregulated under thermal stress were less well functionally defined but were associated with stress response, development, and cellular organization, suggesting that developmental processes may be compromised at realistically high temperatures. These results confirm that genes from the Hsp families play vital roles in the thermal tolerance of developing reptile embryos, and in addition with a number of other genes, should be targets for evaluating the capacity of oviparous reptiles to respond adaptively to the effects of climate change.

opencc-zeroDec 2016View details →

dryad32/100

Case study data 2022: The effects of dune plant roots on loggerhead turtle (Caretta caretta) nest success

<p>Sand dunes are supported by the extensive root systems of dune plants that anchor the dune and protect it from erosion. While all plants that grow on the dunes support their structure, invasive plants can outcompete native and non-native dune plants for resources such as nutrients, sunlight, and space to grow. During the summer, sea turtles lay nests on beaches and near dunes; however, their eggs and hatchlings are at risk of destruction and entrapment by dune plant root penetration. Dune plant roots can penetrate sea turtle nest cavities, thus decreasing the hatching success of the eggs and the emergence success of the hatchlings. The purpose of this project was to determine how plant roots impact loggerhead sea turtle (<em>Caretta caretta)</em> nest success on Casey Key, Sarasota County, Florida, USA, and to assess which factors affect plant root invasion. We predicted (1) a negative impact on loggerhead sea turtle nests by plant roots, (2) invasive plants have a larger impact than native or non-native plants, and (3) the distance from the dune affects whether roots will penetrate the nest. Data from nests excavated in 2022 were used to determine the extent of root penetration and species of plants were documented. Statistical models were used to identify which variables had the greatest effect on root penetration. The results of this study conclude that root presence in the nest cavity decreases both hatch and emergence success of hatchlings within the nest and that nests closer to the dune are more likely to have a higher proportion of root damage and lower hatch and emergence success. This study helps advance understanding of how and if invasive plants affect sea turtle reproductive success and helps inform coastal management aimed at conserving threatened loggerhead populations.</p>

opencc-zeroMar 2024View details →

opennotspecifiedNov 2019View details →

FIGURE 3 in The widely occurring brittlestar Ophiactis savignyi (Amphilepidida: Ophiactidae) as an epibiont on loggerhead sea turtle, Caretta caretta

FIGURE 3. Ophiactis savignyi (Müller & Troschel, 1842) (CMNH-ZE 01692), disc diameters are 1.0 mm (A; different specimen from Fig. 2A) and 2.9 mm (B–D). A, aboral disc and proximal portion of arms, arrow heads indicate spines on disc edge; B, oral disc, part of jaws; C, lateral proximal portion of an arm, arrow heads indicate arm spines; D, aboral proximal portion of an arm. Abbreviations: D, dorsal arm plate; OP, oral papillae. Scale bars = 1 mm

opennotspecifiedNov 2019View details →

FIGURE 2 in The widely occurring brittlestar Ophiactis savignyi (Amphilepidida: Ophiactidae) as an epibiont on loggerhead sea turtle, Caretta caretta

FIGURE 2. Ophiactis savignyi (Müller & Troschel, 1842) (CMNH-ZE 01692), aboral view showing conspicuously variegated green and white body color, disc diameters are 1.0 mm (A), 2.2 mm (B), 2.0 mm (C), 2.5 mm (D), 1.8 mm (E).

FIGURES 31–36. Tursiocola olympica and T in Tursiocola denysii sp. nov. (Bacillariophyta) from the neck skin of Loggerhead sea turtles (Caretta caretta)

FIGURES 31–36. Tursiocola olympica and T. staurolineata type populations, LM, specimens in valve view showing valve shape and size range. 31–33. Tursiocola olympica (holotype slide BRM! NA1/77). 34–36. Tursiocola staurolineata (isotype slide BRM! ZU4/76), Scale bar = 10 μm.

FIGURES 25–30. Tursiocola denysii. Type population, SEM. 25 in Tursiocola denysii sp. nov. (Bacillariophyta) from the neck skin of Loggerhead sea turtles (Caretta caretta)

FIGURES 25–30. Tursiocola denysii. Type population, SEM. 25. Cingulum showing valvocopula (V) with four attached abvalvar copulae (numbered arrows) in side view. 26. Pars interior of valvocopula showing flanged margin and three pairs of opposing tabs. 27. Pars exterior of valvocopula showing thickening of the two pairs of polar tabs. 28. Detail of apex of valvocopula showing second row of abvalvar pores (arrow) located only at the poles. 29–30. Copulae showing open ends and only a single row of pores. Scale bars: Figs 25–27, 29–30= 2 μm, Fig. 28 = 1 μm.

FIGURES 22–24. Tursiocola denysii. Type population, SEM. 22 in Tursiocola denysii sp. nov. (Bacillariophyta) from the neck skin of Loggerhead sea turtles (Caretta caretta)

FIGURES 22–24. Tursiocola denysii. Type population, SEM. 22. Internal view of whole valve showing pseudosepta and butterfly structure. 23. Detail of butterfly structure and internal central area with one knob on the raphe rib. 24. Internal view of whole valve with attached valvocopula. Note one central and 2 polar tabs underlying undulate valve margin on each side of the valve. Scale bars: Figs 22, 24 = 2 μm, Fig. 23 = 1 μm.

FIGURES 15–21. Tursiocola denysii. Type population, SEM. 15 in Tursiocola denysii sp. nov. (Bacillariophyta) from the neck skin of Loggerhead sea turtles (Caretta caretta)

FIGURES 15–21. Tursiocola denysii. Type population, SEM. 15. Single valve with attached cingulum in girdle view. Note undulate mantle margin with three tabs. 16–17. External view of whole valves showing axial and central areas. 18. Detail of external central area of valve depicted in Fig. 16 showing bow tie-shaped stauros and proximal raphe ends within spathulate grooves. 19. Detail of external valve apex of valve depicted in Fig. 16 showing hooked distal raphe end obscured by overhanging siliceous flap. 20. Detail of external central area of valve depicted in Fig. 17 showing areolae structure. 21. Detail of external valve apex of valve depicted in Fig. 17. Scale bars: Figs 15–17 = 2 μm, Figs 18–21 = 1 μm.

FIGURES 1–14 in Tursiocola denysii sp. nov. (Bacillariophyta) from the neck skin of Loggerhead sea turtles (Caretta caretta)

FIGURES 1–14. Tursiocola denysii. Type population, LM. 1–4. Frustules in girdle view showing size range and morphological variation. Arrows in Figs 1, 2, 8, 10 indicate pseudosepta. 5–13. Specimens in valve view showing size range. 14. Valvocopula. Scale bar: Figs 1–14 = 10 μm. = indicates same specimen at different foci.