Adjustments in cholinergic, adrenergic and purinergic control of cardiovascular function in snapping turtle embryos (Chelydra serpentina) incubated in chronic hypoxia

2014 ◽  
Vol 184 (7) ◽  
pp. 891-902 ◽  
Author(s):  
John Eme ◽  
Turk Rhen ◽  
Dane A. Crossley
Keyword(s):  
Chronic Hypoxia ◽  
Cardiovascular Function ◽  
Chelydra Serpentina ◽  
Snapping Turtle

scholarly journals Phenotypic plasticity in the common snapping turtle (Chelydra serpentina): long-term physiological effects of chronic hypoxia during embryonic development

2016 ◽  
Vol 310 (2) ◽  
pp. R176-R184 ◽  
Author(s):  
Oliver H. Wearing ◽  
John Eme ◽  
Turk Rhen ◽  
Dane A. Crossley
Keyword(s):  
Chronic Hypoxia ◽  
Common Garden ◽  
Physiological Effects ◽  
Chelydra Serpentina ◽  
Long Term Effects ◽  
Snapping Turtle ◽  
Snapping Turtles ◽  
The Common ◽  
Hypoxic Incubation

Studies of embryonic and hatchling reptiles have revealed marked plasticity in morphology, metabolism, and cardiovascular function following chronic hypoxic incubation. However, the long-term effects of chronic hypoxia have not yet been investigated in these animals. The aim of this study was to determine growth and postprandial O2 consumption (V̇o2), heart rate ( fH), and mean arterial pressure ( Pm, in kPa) of common snapping turtles ( Chelydra serpentina) that were incubated as embryos in chronic hypoxia (10% O2, H10) or normoxia (21% O2, N21). We hypothesized that hypoxic development would modify posthatching body mass, metabolic rate, and cardiovascular physiology in juvenile snapping turtles. Yearling H10 turtles were significantly smaller than yearling N21 turtles, both of which were raised posthatching in normoxic, common garden conditions. Measurement of postprandial cardiovascular parameters and O2 consumption were conducted in size-matched three-year-old H10 and N21 turtles. Both before and 12 h after feeding, H10 turtles had a significantly lower fH compared with N21 turtles. In addition, V̇o2 was significantly elevated in H10 animals compared with N21 animals 12 h after feeding, and peak postprandial V̇o2 occurred earlier in H10 animals. Pm of three-year-old turtles was not affected by feeding or hypoxic embryonic incubation. Our findings demonstrate that physiological impacts of developmental hypoxia on embryonic reptiles continue into juvenile life.

scholarly journals Chronic hypoxia (10% O 2 ) alters cardiovascular regulation and gene expression in Snapping turtle embryos ( Chelydra serpentina )

2013 ◽  
Vol 27 (S1) ◽  
Author(s):  
John Eme ◽  
Turk Rhen ◽  
Kevin B Tate ◽  
Kathryn Gruchalla ◽  
Zachary F Kohl ◽  
...  
Keyword(s):  
Gene Expression ◽  
Chronic Hypoxia ◽  
Cardiovascular Regulation ◽  
Chelydra Serpentina ◽  
Snapping Turtle

scholarly journals New size record for Snapping Turtle (Chelydra serpentina) in southern Quebec, Canada

2019 ◽  
Vol 132 (4) ◽  
pp. 378-381
Author(s):  
Patrick Galois ◽  
Ève-Lyne Grenier ◽  
Martin Ouellet
Keyword(s):  
Population Structure ◽  
Adult Male ◽  
General Condition ◽  
Carapace Length ◽  
Maximum Size ◽  
Chelydra Serpentina ◽  
Snapping Turtle ◽  
Good General Condition ◽  
Turtle Population ◽  
Local Habitat

We report a new size record for a Snapping Turtle (Chelydra serpentina) in Quebec, Canada. We captured an adult male in good general condition in the Rivière du Sud in the southern Montérégie region. Its straight midline carapace length was 43.2 cm (maximum carapace length 45.1 cm), and it weighed 19.8 kg. This record contributes to our understanding of the maximum size of this species at the northeastern part of its range. More intensive effort will be necessary to document the Snapping Turtle population structure in Quebec to allow for sound comparisons with other populations, as well as a better understanding of the effects of elevation, latitude, and local habitat on Snapping Turtle growth and size.

scholarly journals Snapping Turtle—Tortue serpentine—turtle mi’ kjikj (snapping; Chelydra serpentina), added to the herpetofauna of Cape Breton Island, Nova Scotia, Canada

2018 ◽  
Vol 132 (1) ◽  
pp. 4-7
Author(s):  
John Gilhen ◽  
Terry Power
Keyword(s):  
Nova Scotia ◽  
Natural History ◽  
Natural Resources ◽  
Chelydra Serpentina ◽  
Cape Breton Island ◽  
Snapping Turtle ◽  
The Public ◽  
Cape Breton

Snapping Turtle (Chelydra serpentina) is native to mainland Nova Scotia, but its status on Cape Breton Island has been uncertain. Although it was recorded from Cape Breton Island as early as 1953, until 1984, it was known from only three widely scattered locations. Since that time, additional reports received from the public by Nova Scotia Department of Natural Resources and the Nova Scotia Museum of Natural History suggest that the species is native to Cape Breton Island. Thus, we are adding Snapping Turtle to the native herpetofauna of Cape Breton Island, Nova Scotia.

Fine Structure of the Corpus Luteum of the Snapping Turtle, Chelydra serpentina

Copeia ◽  
1978 ◽  
Vol 1978 (4) ◽  
pp. 622 ◽  
Author(s):  
Rodney V. Cyrus ◽  
I. Y. Mahmoud ◽  
John Klicka
Keyword(s):  
Fine Structure ◽  
Corpus Luteum ◽  
Chelydra Serpentina ◽  
Snapping Turtle

Conservation Genetics of the Common Snapping Turtle (Chelydra serpentina)

1996 ◽  
Vol 10 (2) ◽  
pp. 397-405 ◽  
Author(s):  
Christopher A. Phillips ◽  
Walter W. Dimmick ◽  
John L. Carr
Keyword(s):  
Conservation Genetics ◽  
Chelydra Serpentina ◽  
Snapping Turtle ◽  
The Common

Lymphoid tissue in the snapping turtle,Chelydra serpentina

1972 ◽  
Vol 138 (4) ◽  
pp. 487-497 ◽  
Author(s):  
M. Borysenko ◽  
E. L. Cooper
Keyword(s):  
Lymphoid Tissue ◽  
Chelydra Serpentina ◽  
Snapping Turtle

scholarly journals Status, distribution, and nesting ecology of Snapping Turtle (Chelydra serpentina) on Cape Breton Island, Nova Scotia, Canada

2018 ◽  
Vol 132 (1) ◽  
pp. 8-17
Author(s):  
Terry Power ◽  
John Gilhen
Keyword(s):  
Carapace Length ◽  
Current Knowledge ◽  
Average Rate ◽  
Carapace Width ◽  
Chelydra Serpentina ◽  
Eastern Canada ◽  
Nesting Ecology ◽  
Cape Breton Island ◽  
Snapping Turtle ◽  
Cape Breton

Based on current knowledge of the ecology and distribution of Snapping Turtle (Chelydra serpentina), both in eastern Canada and elsewhere, we conclude this species is native to Cape Breton Island. Seventy-two reports of Snapping Turtle from Cape Breton (1999–2017) indicate a range centred in the area south of Bras d’Or Lake. Date of oviposition ranged from 19 June to 10 July (median = 26 June) among 26 nests observed during 2012–2014. Clutch size for these nests was 23–65 eggs (mean = 46) and among 25 protected nests average rate of hatchling emergence was 21.5%. Time from oviposition to emergence of hatchlings (n = 256) was 75–120 days (mean = 87.2; SD = 9.0) among 20 nests. First emergence ranged from 9 September to 20 October (75–114 nest days; mean = 90) and last emergence ranged from 13 September to 28 October (86–120 nest days; mean = 100). Duration of emergence ranged from one day (i.e., synchronous emergence; five nests) to 37 days (mean = 11 days). The number of days on which hatchlings emerged at a nest ranged from one to nine days (mean = 4 days). Maximum carapace length was 25.0–31.8 mm (mean = 29.0 mm) and maximum carapace width was 23.5–30.0 mm (mean = 27.0 mm) for 256 hatchlings that emerged from 20 protected nests. Mass of hatchlings was 4.9–9.9 g (mean = 7.8 g).

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