Alligator Snapping Turtle

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Mike Soares - One of the best experts on this subject based on the ideXlab platform.

Tricia Mueller - One of the best experts on this subject based on the ideXlab platform.

Patricia J. Holman - One of the best experts on this subject based on the ideXlab platform.

  • Molecular and morphological characterization of a haemogregarine in the Alligator Snapping Turtle, Macrochelys temminckii (Testudines: Chelydridae)
    Parasitology Research, 2017
    Co-Authors: Amer Rasool Alhaboubi, Dana A. Pollard, Patricia J. Holman
    Abstract:

    A severely underweight Alligator Snapping Turtle Macrochelys temminckii Troost in Harlan, 1835, was found near Tyler, Texas, and taken to the Caldwell Zoo. Blood films were submitted to Texas A&M University, College Station, Texas, for morphological and molecular identification of haemogregarine-like inclusions in the red blood cells. Intraerythrocytic Haemogregarina sp. forms were found on microscopic examination at a parasitemia of

  • molecular and morphological characterization of a haemogregarine in the Alligator Snapping Turtle macrochelys temminckii testudines chelydridae
    Parasitology Research, 2017
    Co-Authors: Amer Rasool Alhaboubi, Dana A. Pollard, Patricia J. Holman
    Abstract:

    A severely underweight Alligator Snapping Turtle Macrochelys temminckii Troost in Harlan, 1835, was found near Tyler, Texas, and taken to the Caldwell Zoo. Blood films were submitted to Texas A&M University, College Station, Texas, for morphological and molecular identification of haemogregarine-like inclusions in the red blood cells. Intraerythrocytic Haemogregarina sp. forms were found on microscopic examination at a parasitemia of <1 %. The morphology and morphometric data for the forms indicate similarity to Haemogregarina macrochelysi n. sp. Telford et al., 2009, previously reported in Alligator Snapping Turtles in Florida and Georgia, but two characteristic stage forms were not shared between H. macrochelysi n. sp. and the parasite found in this report. The haemogregarine 18S ribosomal RNA gene (1555-bp fragment) was amplified and cloned, and five clones sequenced. The sequences were deposited in the NCBI GenBank database. All five showed ∼96 % identity to Haemogregarina balli Paterson and Desser, 1976, Hepatozoon sp., and Hemolivia stellata Petit et al., 1990. A 774-bp segment shared 98-99 % identity with the corresponding Haemogregarina sp. rDNA sequence (KR006985) from Caspian Turtles (Mauremys caspica McDowell, 1964) in Iran. A neighbor-joining phylogenetic tree generated from aligned sequences from the clones, 26 hematozoa, Adelina dimidiata Schneider, 1875, and Cryptosporidium serpentis Levine, 1980, revealed the cloned sequences clustered on their own branch within the Haemogregarina spp. clade. No genetic data are available for H. macrochelysi n. sp. at this time, so it remains unclear if this parasite in a Texas Alligator Snapping Turtle is conspecific with H. macrochelysi n. sp.

Amer Rasool Alhaboubi - One of the best experts on this subject based on the ideXlab platform.

  • Molecular and morphological characterization of a haemogregarine in the Alligator Snapping Turtle, Macrochelys temminckii (Testudines: Chelydridae)
    Parasitology Research, 2017
    Co-Authors: Amer Rasool Alhaboubi, Dana A. Pollard, Patricia J. Holman
    Abstract:

    A severely underweight Alligator Snapping Turtle Macrochelys temminckii Troost in Harlan, 1835, was found near Tyler, Texas, and taken to the Caldwell Zoo. Blood films were submitted to Texas A&M University, College Station, Texas, for morphological and molecular identification of haemogregarine-like inclusions in the red blood cells. Intraerythrocytic Haemogregarina sp. forms were found on microscopic examination at a parasitemia of

  • molecular and morphological characterization of a haemogregarine in the Alligator Snapping Turtle macrochelys temminckii testudines chelydridae
    Parasitology Research, 2017
    Co-Authors: Amer Rasool Alhaboubi, Dana A. Pollard, Patricia J. Holman
    Abstract:

    A severely underweight Alligator Snapping Turtle Macrochelys temminckii Troost in Harlan, 1835, was found near Tyler, Texas, and taken to the Caldwell Zoo. Blood films were submitted to Texas A&M University, College Station, Texas, for morphological and molecular identification of haemogregarine-like inclusions in the red blood cells. Intraerythrocytic Haemogregarina sp. forms were found on microscopic examination at a parasitemia of <1 %. The morphology and morphometric data for the forms indicate similarity to Haemogregarina macrochelysi n. sp. Telford et al., 2009, previously reported in Alligator Snapping Turtles in Florida and Georgia, but two characteristic stage forms were not shared between H. macrochelysi n. sp. and the parasite found in this report. The haemogregarine 18S ribosomal RNA gene (1555-bp fragment) was amplified and cloned, and five clones sequenced. The sequences were deposited in the NCBI GenBank database. All five showed ∼96 % identity to Haemogregarina balli Paterson and Desser, 1976, Hepatozoon sp., and Hemolivia stellata Petit et al., 1990. A 774-bp segment shared 98-99 % identity with the corresponding Haemogregarina sp. rDNA sequence (KR006985) from Caspian Turtles (Mauremys caspica McDowell, 1964) in Iran. A neighbor-joining phylogenetic tree generated from aligned sequences from the clones, 26 hematozoa, Adelina dimidiata Schneider, 1875, and Cryptosporidium serpentis Levine, 1980, revealed the cloned sequences clustered on their own branch within the Haemogregarina spp. clade. No genetic data are available for H. macrochelysi n. sp. at this time, so it remains unclear if this parasite in a Texas Alligator Snapping Turtle is conspecific with H. macrochelysi n. sp.

J. Daren Riedle - One of the best experts on this subject based on the ideXlab platform.

  • Habitat Associations of Aquatic Turtle Communities in Eastern Oklahoma
    2015
    Co-Authors: J. Daren Riedle
    Abstract:

    North American river systems have experienced an array of anthropogenic influences. Very little baseline data exist for tracking population trends in relation to these activities. Between 1997 and 1999, we sampled 67 sites in 16 counties of eastern Oklahoma during a survey for the Alligator Snapping Turtle, Macrochelys temminckii. We captured 93% (13/14) of the aquatic Turtle species that have been recorded from eastern Oklahoma. Canonical Correspondence Analysis of site-by-species-by-habitat separated some Turtles by habitat type: (1) those of faster flowing, less turbid stretches with more pools and runs (Pseudemys concinna, Sternotherus carinatus), (2) those of middle, slower reaches of streams and backwater habitats (Chelydra serpentina, Macrochelys temminckii, Sternotherus odoratus, Trachemys scripta), and (3) those of lower reaches with slow-moving deep water with clay substrates and steep, overhanging banks (Apalone spinifera, Graptemys ouachitensis, Graptemys pseudogeographica). We compared our data with previous distributional records to reveal one range extension and one possible range contraction. We observed differences in capture rates among the 12 rivers in our study, with particularly low capture rates in the southeastern Kiamichi, Mountain Fork, and Little rivers. © 2009 Oklahoma Academy of Science.

  • Monitoring of a Reintroduced Population of Juvenile Alligator Snapping Turtles
    Chelonian Conservation and Biology, 2015
    Co-Authors: Travis Anthony, Mitchell B. East, J. Daren Riedle, Brian M. Fillmore, Day B. Ligon
    Abstract:

    Abstract Reintroduction is a common management tool for conserving imperiled species, but many reintroductions have included little or no postrelease assessment of project success. The Alligator Snapping Turtle (Macrochelys temminckii) is a long-lived species that has experienced significant declines throughout its range, although suitable habitat remains. We report the findings of a reintroduction effort that was initiated in 2008 near the northwestern limit of the species' range. Two hundred forty-six M. temminckii were released into the Caney River and its tributary, Pond Creek, from 2008 to 2010. All Turtles exhibited measurable growth by their first recapture 1–3 yrs after release, and no decline in body condition was observed, either in comparison to prerelease body condition or to the condition of animals in the same cohorts that remained in captivity. Apparent survival and recapture probabilities increased with age. Apparent survivorship values were higher for Turtles released in the main channel ...

  • Temporal changes in an Alligator Snapping Turtle (Macrochelys temminckii) population
    Wildlife Research, 2013
    Co-Authors: Mitchell B. East, J. Daren Riedle, Day B. Ligon
    Abstract:

    Abstract Context. Monitoring populations of long-lived species requires continuous long-term efforts. This is especially applicable for species that have experienced declines range-wide. Aims. Our study assessed the current status of a population of wild Macrochelys temminckii and compared the present results to those from a survey conducted nearly a decade ago. Methods. Trapping in 2010–2011 was conducted on two creeks within the refuge, during the months of May–July. Capture data were compared with data collected by similar methods in 1997–2001. Key results. The population structure of M. temminckii was dominated by juveniles, with few large adults or small juveniles detected and a missing size class was evident. Retrospective analysis of 1997–2001 data revealed that the population was likely to be in decline even then, despite high capture rates. Conclusions. The M. temminckii population showed significant declines that indicated that the population had experienced stressors of unknown origin. The stat...

  • Habitat Associations of Aquatic Turtle Communities in
    2009
    Co-Authors: J. Daren Riedle, Paul A. Shipman, Stanley F. Fox, David M Leslie
    Abstract:

    North American river systems have experienced an array of anthropogenic influences. Very little baseline data exist for tracking population trends in relation to these activities. Between 1997 and 1999, we sampled 67 sites in 16 counties of eastern Oklahoma during a survey for the Alligator Snapping Turtle, Macrochelys temminckii. We captured 93% (13/14) of the aquatic Turtle species that have been recorded from eastern Oklahoma. Canonical Correspondence Analysis of site-by-species-by-habitat separated some Turtles by habitat type: (1) those of faster flowing, less turbid stretches with more pools and runs (Pseudemys concinna, Sternotherus carinatus), (2) those of middle, slower reaches of streams and backwater habitats (Chelydra serpentina, Macrochelys temminckii, Sternotherus odoratus, Trachemys scripta), and (3) those of lower reaches with slow-moving deep water with clay substrates and steep, overhanging banks (Apalone spinifera, Graptemys ouachitensis, Graptemys pseudogeographica). We compared our data with previous distributional records to reveal one range extension and one possible range contraction. We observed differences in capture rates among the 12 rivers in our study, with particularly low capture rates in the southeastern Kiamichi, Mountain Fork, and Little rivers. © 2009 Oklahoma Academy of Science.

  • Status and Distribution of the Alligator Snapping Turtle (Macrochelys temminckii) in Southeastern Missouri
    Southeastern Naturalist, 2008
    Co-Authors: Paul A. Shipman, J. Daren Riedle
    Abstract:

    Abstract Macrochelys temminckii Harlan (Alligator Snapping Turtle) is a large aquatic Turtle species that has been experiencing population declines throughout its range. Unfortunately, little is known about the species' basic biology or historic status throughout the majority of its range. In order to better understand the status and distribution of M. temminckii in southeastern Missouri, we visited 50 sites with suitable habitat and trapped at 19 of them in Dunklin, Mississippi, New Madrid, and Pemiscot counties, MO in 1994. We captured 37 M. temminckii at four sites in Pemiscot and Dunklin counties. The Dunklin County site was resampled in 1997, and radio transmitters were attached to 11 Alligator Snapping Turtles (6 males: 4 females: 1 unknown sex). Telemetered Turtles were found at microhabitats consisting of more cover, high-density canopy, and lower gradient banks than random locations. We noted a significant difference in Turtle size between sites that have and those that have not experienced histo...