Accumulation of organochlorine contaminants in loggerhead sea turtles, Caretta caretta, from the eastern Adriatic Sea

Lazar, Bojan; Maslov, Luna; Romanić, Snježana Herceg; Gračan, Romana; Krauthacker, Blanka; Holcer, Draško; Tvrtković, Nikola

doi:10.1016/j.chemosphere.2010.09.015

Cited by 62 publications

(35 citation statements)

References 45 publications

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“…Other studies have also reported variable lipid content in adipose tissues, for example, 14.9 %-88 % in common snapping turtles (Chelydra serpentina) collected in Minnesota (Helwig and Hora 1983) and 25.9 %-68.2 % in loggerhead sea turtles (Caretta caretta) from eastern Adriatic Sea (Lazar et al 2011). The mean lipid content in adipose tissues of snapping turtles collected from different locations in New Jersey and Maryland ranged from 13.88 % to 73.38 % (Albers et al 1986).…”

Section: Resultsmentioning

confidence: 99%

Accumulation of Polychlorinated Biphenyls (PCBs) and Evaluation of Hematological and Immunological Effects of PCB Exposure on Turtles

Halbrook

Sparling

2012

Bull Environ Contam Toxicol

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Concentrations of total polychlorinated biphenyls (PCBs), Aroclor 1260, and 26 congeners were measured in liver, fat, and eggs of red-eared slider turtles (Trachemys scripta elegans) collected from ponds near or on the Paducah Gaseous Diffusion Plant (PGDP), Kentucky, USA. Concentrations of total PCBs (wet mass) ranged from 0.002 to 0.480 mg/kg, 0.028 to 0.839 mg/kg, and 0.001 to 0.011 mg/kg in liver, fat, and eggs, respectively. Concentrations of Arochlor 1260 did not exceed 0.430, 0.419, and 0.007 mg/kg in liver, fat, and eggs, respectively. Exposure to PCBs in red-eared sliders collected from the PGDP is characterized by low concentrations of moderately chlorinated mono-ortho and di-ortho congeners (PCB 153, 180, and 118). Although PCB concentrations measured in the current study were low, chronic exposure to PCBs may have altered hematology and immunity of the turtles examined. Total white blood cell count and number of heterophils were negatively correlated with concentrations of total PCBs and Arochlor 1260, respectively. However, disease and other contaminants in the study area may influence the results. Because little is known regarding the influence of PCBs on hematology and immune function in turtles, additional study is needed to better evaluate results observed in the current study.

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Section: Resultsmentioning

confidence: 99%

Accumulation of Polychlorinated Biphenyls (PCBs) and Evaluation of Hematological and Immunological Effects of PCB Exposure on Turtles

Halbrook

Sparling

2012

Bull Environ Contam Toxicol

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“…The main identiWed threats at sea to loggerhead sea turtles in the basin include incidental capture in Wshing gears, collision with boats and intentional killing (Panigada et al 2008;Tomás et al 2008;Casale 2011), which impact the overall mortality (Casale et al 2007b and represent a high level of threat (Wallace et al 2011). There is growing evidence of these and other anthropogenic threats in the Adriatic: bycatch and collision with boats, debris ingestion and pollutants (Lazar and TvrtkoviT 1995;AVronte and Scaravelli 2001;Casale et al 2004Franzellitti et al 2004;Lazar and Graban 2011;Lazar et al 2011b).…”

Section: Introductionmentioning

confidence: 98%

Foraging grounds, movement patterns and habitat connectivity of juvenile loggerhead turtles (Caretta caretta) tracked from the Adriatic Sea

Casale

Affronte²,

Scaravelli

et al. 2012

Mar Biol

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Knowledge about migratory routes and highly frequented areas is a priority for sea turtle conservation, but the movement patterns of juveniles frequenting the Adriatic have not been investigated yet, although juveniles represent the bulk of populations. We tracked by satellite six juvenile and one adult female loggerhead from the north Adriatic. The results indicated that loggerhead juveniles (1) can either show a residential behaviour remaining in the Adriatic throughout the year or perform seasonal migrations to other areas, (2) can remain even in the coldest, northernmost area during winter, (3) can frequent relatively small foraging areas, (4) mostly frequent the eastern part of the Adriatic, and (5) follow preferred migratory routes along the western and eastern Adriatic coasts. The movements of the adult turtle also revealed (6) a behavioural polymorphism in Mediterranean adults, which included a lack of area fidelity and connection between distant neritic foraging grounds

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“…However, anthropogenic drivers such as fisheries interactions and pollution may alter the dynamics of parasites and host (Kennedy & Watt 1994, Des Clers & Wootten 1990. High fishing effort and pollution have already been identified as major threats to resident loggerhead populations (Lazar & Tvrtković 1995, Casale et al 2004, Storelli et al 2007, Lazar & Grač an 2011, Lazar et al 2011b). The potential influence of intestinal parasites on the demographics of host populations is therefore a factor of concern, particularly for small juvenile loggerheads in the Adriatic Sea.…”

Section: Host Ontogeny and Helminth Infectionsmentioning

confidence: 99%

Gastrointestinal helminth community of loggerhead sea turtle Caretta caretta in the Adriatic Sea

Gračan

Buršić²,

Mladineo³

et al. 2012

Dis. Aquat. Org.

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We analysed the intestinal helminth community of 70 loggerhead sea turtles Caretta caretta with a curved carapace length ranging from 25 to 85.4 cm, recovered dead in neritic foraging habitats in the Adriatic Sea in 1995 to 2004. The overall prevalence of infection was high (70.0%), with a mean abundance of 36.8 helminth parasites per turtle. Helminth fauna comprised 5 trematodes (Calycodes anthos, Enodiotrema megachondrus, Orchidasma amphiorchis, Pachypsolus irroratus, Rhytidodes gelatinosus) and 3 nematodes (Sulcascaris sulcata, Anisakis spp., Hysterothylacium sp.), with 6 taxa specific for marine turtles. In terms of infection intensity and parasite abundance, O. amphiorchis was the dominant species (mean intensity: 49.8; mean abundance: 12.8), followed by R. gelatinosus (30.5 and 8.3, respectively) and P. irroratus (23.5 and 7.0, respectively), while larval Anisakis spp. exhibited the highest prevalence (34.3%). The intensity of helminth infection ranged from 1 to 302 (mean: 52.6 ± 69.1) and was not correlated with the size of turtles; this relationship held for all species, except R. gelatinosus (r S = 0.556, p < 0.05). In comparison to other marine habitats, the helminth community of Adriatic loggerheads is characterised by higher species diversity (Shannon-Wiener H' = 1.58) and evenness (E = 0.76), and lower dominance values (Berger-Parker d = 0.35), which can be attributed to the life history and feeding ecology of sea turtles in recruited neritic grounds and the diversity of their benthic prey.

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Accumulation of organochlorine contaminants in loggerhead sea turtles, Caretta caretta, from the eastern Adriatic Sea

Cited by 62 publications

References 45 publications

Accumulation of Polychlorinated Biphenyls (PCBs) and Evaluation of Hematological and Immunological Effects of PCB Exposure on Turtles

Accumulation of Polychlorinated Biphenyls (PCBs) and Evaluation of Hematological and Immunological Effects of PCB Exposure on Turtles

Foraging grounds, movement patterns and habitat connectivity of juvenile loggerhead turtles (Caretta caretta) tracked from the Adriatic Sea

Gastrointestinal helminth community of loggerhead sea turtle Caretta caretta in the Adriatic Sea

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