scholarly journals Gas Exchange in the Loggerhead Sea Turtle Caretta Caretta

1987 ◽  
Vol 131 (1) ◽  
pp. 365-372 ◽  
Author(s):  
M. E. LUTCAVAGE ◽  
P. L. LUTZ ◽  
H. BAIER
Keyword(s):  
Blood Flow ◽  
Pulmonary Blood Flow ◽  
Sea Turtles ◽  
Venous Blood ◽  
Loggerhead Turtle ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Aerobic Performance ◽  
Breathing Patterns ◽  
Loggerhead Sea Turtle

Pulmonary CO diffusion capacity (DLCO), lung volume (VL), oxygen uptake (Vo2) and pulmonary blood flow (QL) were measured simultaneously in the loggerhead sea turtle Caretta caretta (Linnaeus) (8–11 kg) using a gas rebreathing technique (syringe pump ventilation). Calculated DLCO and Vo2 values in the loggerhead turtle are approximately twice those of non-varanid reptiles and about 25 % of values for resting mammals. Evidence based on an estimated lung-capillary O2 gradient, δPo2, shows that only a small driving gradient is required for O2 conductance across the loggerhead turtle lung. Pulmonary blood flow values are high compared to those for other reptiles; on the basis of the Fick principle, this implies a substantial blood convection requirement. Differences in oxygen transport mechanisms between the loggerhead sea turtle and other highly aerobic but terrestrial reptiles may result from divergent lung structures and breathing patterns. In sea turtles, the coupling of respiration with locomotory behaviour is one factor that may limit aerobic performance. Since sea turtles have only intermittent access to air, they are required to load both arterial and venous blood with O2 before submerging

scholarly journals First report of the scavenging isopod Natatolana neglecta (Crustacea: Isopoda: Cirolanidae) feeding on a sea turtle

2019 ◽  
Vol 20 (2) ◽  
pp. 297
Author(s):  
OHIANA REVUELTA ◽  
FRANCESC DOMÈNECH ◽  
STEPHEN KEABLE ◽  
RAÚL MÍGUEZ-LOZANO
Keyword(s):  
Sea Turtles ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Dead Sea ◽  
Mediterranean Coast ◽  
Gut Contents ◽  
Post Mortem ◽  
Juvenile Male ◽  
Coelomic Cavity ◽  
Loggerhead Sea Turtle

A juvenile male loggerhead sea turtle (Caretta caretta) was found dead in April 2015, entangled in a trammel net on the Mediterranean coast of Spain. Post-mortem examination revealed the presence of ninety-five isopods dispersed in the coelomic cavity, and inside the oesophagus and skull. All individuals found scavenging on the sea turtle were identified as Natatolana neglecta (Hansen, 1890) (Isopoda: Cirolanidae). Genetic analysis of the isopod gut contents showed that they were feeding on turtle tissue, confirming that N. neglecta can also attack dead sea turtles. This study shows the value of cirolanids as potential indicators of the cause of death in stranded sea turtles.

Transplastron Enterocentesis to Manage Buoyancy Disorder in an Adult Loggerhead Sea Turtle (Caretta caretta)

2021 ◽  
Author(s):  
Brittany L Liguori ◽  
MAXIMILIAN POLYAK ◽  
Samantha A Clark ◽  
Ashley N Sabater ◽  
Taylor B Clasen ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Medical Therapy ◽  
Sea Turtles ◽  
Systemic Disease ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Loggerhead Sea Turtle ◽  
Gas Accumulation ◽  
In The Wild ◽  
Patient Size

Buoyancy disorder in sea turtles is a common condition that contributes to increased morbidity and mortality in the wild and because of this, is often encountered in rehabilitation facilities. The pathological gas accumulation that is a sequelae of this disorder can create challenges in treatment of this disease, especially when concurrent systemic disease is present. These challenges increase with patient size, as anatomy and location of pathology makes gas evacuation more difficult utilizing conventional methods when medical therapy alone is unsuccessful. This report discusses a novel technique utilizing ultrasonic-guided transplastron enterocentesis of the proximal gastrointestinal tract in an adult loggerhead sea turtle ( Caretta caretta ) with suspected intestinal obstruction. The sea turtle presented with positive buoyancy and routine workup revealed gas accumulation in the gastrointestinal tract, as well as concurrent pneumonia. Medical therapy alone did not diminish the positive buoyancy or gastrointestinal distension. Ultrasonic-guided transplastron enterocentesis was performed via the connective tissue lateral to the 3rd inframarginal scute while the turtle was positioned with its left side raised, allowing any gas-filled intestine to be positioned laterally. Approximately 10.3 L of gas were evacuated from the proximal gastrointestinal lumen and within 15 mins, the turtle was neutrally buoyant. It continued to exhibit normal surfacing, diving, and resting behavior. The turtle was released 111 days after enterocentesis in order to allow treatment of the concurrent pneumonia. The technique discussed in this report has implications for improving treatment of buoyancy disorder in large adult sea turtles and increasing likelihood of release.

Intraerythrocytic inclusion bodies in the loggerhead sea turtle Caretta caretta from Madeira

2000 ◽  
Vol 80 (5) ◽  
pp. 957-958 ◽  
Author(s):  
J.C. Eiras ◽  
T. Dellinger ◽  
A.J. Davies ◽  
G. Costa ◽  
A.P. Alves de Matos
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Inclusion Bodies ◽  
Sea Turtles ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Loggerhead Sea Turtles ◽  
Loggerhead Sea Turtle ◽  
Intracytoplasmic Inclusion ◽  
Intracytoplasmic Inclusion Bodies

Intracytoplasmic inclusion bodies were detected in the mature red blood cells of twenty juvenile loggerhead sea turtles, Caretta caretta, captured in Madeira. The bodies were mostly single, round to oval, frequently irregular in outline, and their diameter varied from 0.5 to 2.0 μm. Most bodies were associated with small granular areas, often in the form of a tail or projection. In some cells, only granular areas were apparent. The nuclei of most erythrocytes were irregular in outline but degeneration of red blood cells was not observed. The identity of these intraerythrocytic structures is not clear but they may be viral or rickettsial in nature.

A cleaning association between the oceanic crab Planes minutus and the loggerhead sea turtle Caretta caretta

1994 ◽  
Vol 74 (3) ◽  
pp. 735-737 ◽  
Author(s):  
John Davenport
Keyword(s):  
Sea Turtles ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Loggerhead Sea Turtle ◽  
General Acceptance

Columbus crabs, Planes minutus (L.) (Crustacea: Brachyura) are often found on the postero-ventral surfaces of sea turtles, particularly the loggerhead Caretta caretta (L.) (Testudines: Cheloniidae). There has been a general acceptance of a hypothesis that the crabs feed upon turtle faeces. However, evidence is presented here to demonstrate that Planes has a ‘cleaning’ role, feeding on other epibionts (e.g. barnacle cyprids, parasitic amphipods) during daylight hours. At night it is likely that the crabs feed on neustonic animals (e.g. euphausids). The species is also cannibalistic.

scholarly journals First record of loggerhead sea turtles Caretta caretta in Sebastián Vizcaíno Bay, Baja California Peninsula, Mexico

2020 ◽  
Vol 48 (1) ◽  
pp. 146-149
Author(s):  
Helena Fernández-Sanz ◽  
Fabián Castillo Romero ◽  
Joaquín Rivera Rodríguez ◽  
Noé López Paz ◽  
Gabriel Arturo Zaragoza Aguilar ◽  
...  
Keyword(s):  
Baja California ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Caretta Caretta ◽  
First Record ◽  
Sea Turtle ◽  
Baja California Peninsula ◽  
Loggerhead Sea Turtles ◽  
Biometric Data ◽  
Loggerhead Sea Turtle

The loggerhead sea turtle (Caretta caretta) is an endangered species which distributes around the west coast of the Baja California Peninsula. In Baja California Sur, the conservation efforts for this species were focused in the Gulf of Ulloa; however, within the Pacific coast of the Baja California Peninsula, Sebastián Vizcaíno Bay (SVB) biological active center suit the optimal conditions for the presence of loggerheads. This study aimed to investigate SVB as a potential foraging area for loggerheads. Between July and August 2018, three prospective surveys were conducted, in search of marine turtles in SVB. A total of three loggerhead turtles and one eastern Pacific green turtle (Chelonia mydas) were captured; biometric data were recorded, and organisms were classified as juveniles. This is the first report of the loggerhead sea turtles in the SVB and given the oceanographic characteristics of the bay, it is a potential foraging and development area for the species.

scholarly journals Helminth Infection of the Loggerhead Sea Turtle Caretta caretta along the Coasts of Sicily and the North West Adriatic Sea

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1408
Author(s):  
Antonino Gentile ◽  
Tullia Amato ◽  
Andrea Gustinelli ◽  
Maria Letizia Fioravanti ◽  
Delia Gambino ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Sea Turtles ◽  
Single Species ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Helminth Parasites ◽  
Loggerhead Sea Turtles ◽  
Loggerhead Sea Turtle ◽  
North West ◽  
The North

We provide new data on the presence of helminth parasites in 64 individual loggerhead sea turtles Caretta caretta stranded along the coasts of Sicily and the northwest Adriatic Sea between June 2014 and August 2016. The necropsy examination revealed 31 individuals (48.4%) positive for endoparasites, showing a greater prevalence of trematodes than nematodes. In particular, seven species and a single genus of Trematoda (Hapalotrema) and a single species and genus of Nematoda (Kathlania) were identified. Among the Digenea flukes the species with the highest prevalence of infection were Rhytidodes gelatinosus (34.6%) and Hapalotrema sp. (33.3%), while among the Nematoda they were Kathlania sp. (33.3%) and Sulcascaris sulcata (33.3%). Analysis of variance (ANOVA) was applied among the recovery sites of the stranded loggerhead sea turtles and prevalence of endoparasites was used to highlight any relationship between the parasites and the origin of the hosts. ANOVA showed significant differences (p < 0.001) among the data used.

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

Zootaxa ◽  
2019 ◽  
Vol 4695 (5) ◽  
pp. 497-500
Author(s):  
RYOTA HAYASHI ◽  
MASANORI OKANISHI
Keyword(s):  
New Species ◽  
Sea Turtles ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
The Novel ◽  
Loggerhead Sea Turtles ◽  
Loggerhead Sea Turtle ◽  
First Occurrence

We describe the first occurrence of the widely occurring brittlestar Ophiactis savignyi (Müller & Troschel, 1842) as epibionts on Caretta caretta (Linnaeus, 1758), the loggerhead sea turtles. On the sea turtle epibionts, the coronulid barnacles were well studied as listed in Hayashi (2013), and recently some crustaceans were collected from loggerhead sea turtles and described as new species (Tanabe et al. 2017; Tanaka and Hayashi 2019). In contrast, echinoderm epibionts listed from sea turtles are poorly understood (Table 1) and this study represents the novel discovery of an ophiuroid, which was not previously known to occur on the surface of this species. 

Pulmonary function of the green sea turtle, Chelonia mydas

1987 ◽  
Vol 62 (2) ◽  
pp. 459-463 ◽  
Author(s):  
R. N. Gatz ◽  
M. L. Glass ◽  
S. C. Wood
Keyword(s):  
Blood Flow ◽  
Pulmonary Blood Flow ◽  
Venous Blood ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Green Sea Turtle ◽  
Physiological Dead Space ◽  
Dead Space Volume ◽  
Residual Capacity ◽  
End Tidal

Lung volumes, oxygen uptake (VO2), end-tidal PO2, and PCO2, diffusing capacity of the lungs for CO (DLCO), pulmonary blood flow (QL) and respiratory frequency were measured in the green sea turtle (Chelonia mydas) (49–127 kg body wt). Mean lung volume (VL) determined from helium dilution was 57 ml/kg and physiological dead space volume (VD) was about 3.6 ml/kg. QL, determined from acetylene uptake during rebreathing, increased in proportion to VO2 with temperature. Therefore, constant O2 content difference was maintained between pulmonary arterial and venous blood. DLCO, measured using a rebreathing technique, was 0.04 ml X kg-1 X min-1 X Torr-1 at 25 degrees C. Several cardiopulmonary characteristics in C. mydas are advantageous to diving: large tidal volume relative to functional residual capacity promotes fast exchange of the alveolar gas when the turtle surfaces for breathing: and the concomitant rise of pulmonary blood flow and O2 uptake with temperature assures efficient O2 transport regardless of wide temperature variations encountered during migrations.

scholarly journals Record of the Loggerhead Sea Turtle, Caretta caretta (Testudines, Cheloniidae), in the Black Sea with the Review of the Species Occurrence in the Region

Zoodiversity ◽  
2021 ◽  
Vol 55 (2) ◽  
pp. 127-132
Author(s):  
O. Zinenko ◽  
K. A. Vishnyakova ◽  
L. Stoyanov ◽  
P. E. Gol’din
Keyword(s):  
Black Sea ◽  
Sea Turtles ◽  
Caretta Caretta ◽  
First Record ◽  
Sea Turtle ◽  
The Black Sea ◽  
Loggerhead Sea Turtles ◽  
Loggerhead Sea Turtle ◽  
The North ◽  
North Western

A rare live record of the loggerhead sea turtle Caretta caretta (Linnaeus, 1758) is reported from the Dzharylgach Gulf in the north-western Black Sea. This is the first record from Ukrainian waters since 1962 and the northernmost record of the species in the Black Sea. The loggerhead sea turtles of the east Mediterranean origin are increasingly often seen in the Marmara and the Black Sea during the latest decade, which is an evidence for potential expansion of this species range, at least partly due to climate changes. Key words: sea turtles, Caretta caretta, Black Sea, Ukraine, range expansion.

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