New size record for Snapping Turtle (<i>Chelydra serpentina</i>) in southern Quebec, Canada

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.

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

The Canadian Field-Naturalist ◽

10.22621/cfn.v132i1.2042 ◽

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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Parameters of a Marsh Snapping Turtle Population Lacreek Refuge, South Dakota

Journal of Wildlife Management ◽

10.2307/3799337 ◽

1969 ◽

Vol 33 (4) ◽

pp. 995 ◽

Cited By ~ 40

Author(s):

Donald A. Hammer

Keyword(s):

South Dakota ◽

Snapping Turtle ◽

Turtle Population

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Helminths of the Snapping Turtle, Chelydra serpentina, from Oklahoma, Including the First Report and Description of the Male of Capillaria serpentina Harwood, 1932

Transactions of the American Microscopical Society ◽

10.2307/3223517 ◽

1953 ◽

Vol 72 (2) ◽

pp. 175 ◽

Cited By ~ 4

Author(s):

R. Winston Williams

Keyword(s):

Chelydra Serpentina ◽

Snapping Turtle ◽

First Report

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Temporal and geographic variation of organochlorine residues in eggs of the common snapping turtle (Chelydra serpentina serpentina) (1981–1991) and comparisons to trends in the herring gull (Larus argentatus) in the Great Lakes basin in Ontario, Canada

Archives of Environmental Contamination and Toxicology ◽

10.1007/bf00212435 ◽

1996 ◽

Vol 31 (4) ◽

pp. 512-524 ◽

Cited By ~ 27

Author(s):

C. A. Bishop ◽

P. Ng ◽

R. J. Norstrom ◽

R. J. Brooks ◽

K. E. Pettit

Keyword(s):

Great Lakes ◽

Geographic Variation ◽

Larus Argentatus ◽

Herring Gull ◽

Chelydra Serpentina ◽

Great Lakes Basin ◽

Snapping Turtle ◽

The Common

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VARIATION, SEXUAL DIMORPHISM, AND MATURITY IN A QUEBEC POPULATION OF THE COMMON SNAPPING TURTLE, CHELYDRA SERPENTINA

Canadian Journal of Zoology ◽

10.1139/z60-003 ◽

1960 ◽

Vol 38 (1) ◽

pp. 19-38 ◽

Cited By ~ 28

Author(s):

James E. Mosimann ◽

J. Roger Bider

Keyword(s):

Carapace Length ◽

Relative Rate ◽

Analysis Of Covariance ◽

Head Width ◽

Posterior Lobe ◽

Chelydra Serpentina ◽

Single Population ◽

Species Analysis ◽

The Common ◽

Males And Females

An analysis was made of a sample of 55 snapping turtles, Chelydra serpentina, from a single locality in southern Quebec. The variation studied is regarded as being representative of that of a single population of the species. Analysis of covariance was used in studying dimorphism in various measurements. Conclusions reached are: (a) the sex ratio is one; (b) males grow to a larger size than females; (c) males and females become mature at a carapace length of about 200 millimeters; (d) the ratio precloacal distance over posterior lobe of the plastron gives a practical index for sex determination in adults; (e) there is a set of small but interrelated changes correlated with a greater precloacal distance in the male: These are that males have the plastron shifted forward slightly, have the bridge slightly longer relative to plastron length, and have the posterior lobe of the plastron slightly shorter relative to plastron length; (f) the precloacal length of the male (which area accommodates the penis) grows relatively faster than carapace length; the precloacal length of the female grows at the same relative rate as carapace length; (g) there is virtually no dimorphism in shell dimensions nor in head width.

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Deskripsi dan Preferensi Habitat Udang Air Tawar Macrobrachium rosenbergii (De Man, 1879) dari Sungai Maraja, Toli-Toli, Sulawesi Tengah

Natural Science Journal of Science and Technology ◽

10.22487/25411969.2019.v8.i2.13539 ◽

2019 ◽

Vol 8 (2) ◽

Author(s):

Aswandi Aswandi ◽

Annawaty Annawaty

Keyword(s):

Carapace Length ◽

Economic Value ◽

Line Drawing ◽

Macrobrachium Rosenbergii ◽

Maximum Size ◽

Morphological Characters ◽

Freshwater Prawn ◽

Large Size ◽

De Man ◽

Central Sulawesi

Macrobrachium rosenbergii (De Man, 1879) is a freshwater prawn species that have a high economic value because of its relatively large size compared to the other freshwater prawn species. Exploration to find this species in the Maraja River, Toli-Toli, Central Sulawesi was carried out in January 2019. Sample collected using tray net. Two male specimens of M. rosenbergii were found in the river, with maximum size of carapace length reaching 45.94 mm. Macrobrachium rosenbergii has been found in habitats with clay substrate and slow flowing current. This record extended the distribution of M. rosenbergii, whose spread in Sulawesi has been known only in the southern part of the island, such as in Makassar, Bone, Pinrang, Wajo and Luwu. In this paper, the morphological characters and line drawing of some character M. rosenbergii from the Maraja River were provided.

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Microsurgical DREZ lesions for the control of cancer-related pain

Neurosurgical Focus: Video ◽

10.3171/2020.7.focvid2033 ◽

2020 ◽

Vol 3 (2) ◽

pp. V14 ◽

Cited By ~ 1

Author(s):

Edoardo Mazzucchi ◽

Andrei Brinzeu ◽

Patrick Mertens ◽

Marc Sindou

Keyword(s):

General Condition ◽

Dorsal Root ◽

Lateral Part ◽

Entry Zone ◽

Dorsal Root Entry Zone ◽

Patients With Cancer ◽

Root Entry Zone ◽

Refractory Pain ◽

Pain Pathways ◽

Good General Condition

Pain in patients with cancer is a major problem, and sometimes it is necessary to surgically interrupt pain pathways to effectively control refractory pain. Surgical lesion of the dorsal root entry zone (DREZ) was first performed in 1972 for the treatment of pain related to a Pancoast-Tobias tumor. The rationale of DREZotomy is to preferentially interrupt the nociceptive inputs in the lateral part of the DREZ and the ventrolateral (excitatory) part of the dorsal horn. Microsurgical DREZotomy is one technique for DREZ lesioning that is suited for tailored control of pain in patients in good general condition who are experiencing pain in a well-defined territory.The video can be found here: https://youtu.be/JtLQDP7gYSQ

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

The Canadian Field-Naturalist ◽

10.22621/cfn.v132i1.2020 ◽

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.

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