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41 results for “American Alligator”
American alligator GPS tracking study from May 2008 to September 2010 on Sapelo Island, Georgia
We deployed GPS tracking units on seven adult American alligators (two females and five males), for periods ranging from 34 to 100 days from May 2008 to September 2010 on Sapelo Island, Georgia. GPS units were set to record the location of tracked alligators every 1.5 to 2 hours. GPS data were then downloaded and tracks analyzed using GIS software after recapture.
Fig. 3 in Gastric nematode diversity between estuarine and inland freshwater populations of the American alligator (Alligator mississippiensis, daudin 1802), and the prediction of intermediate hosts
Fig. 3. Prey content species richness accumulation curves based on 1000 randomizations using Estimate 9.1.0. Data obtained from stomach flushing or necropsy of American alligators from (A) coastal or (B) inland habitats between 2008 and 2011. The black broken line (- -) represents the upper 95% confidence level, and the broken dotted broken line (- · -) represents the lower 95% confidence level of the species accumulation curve. The slow approach to the asymptote in coastal habitats suggests prey contents of sampled alligators did not capture all probable prey. The asymptote of inland alligators slowly begins to plateau, which may suggest our sampling efforts were close to capturing most of the probable prey of alligators.
Fig. 2 in Gastric nematode diversity between estuarine and inland freshwater populations of the American alligator (Alligator mississippiensis, daudin 1802), and the prediction of intermediate hosts
Fig. 2. Nematode species richness accumulation curve (A) and Coleman rarefaction curve (B) based on 1000 randomizations using Estimate 9.1.0. The black broken line (- -) represents the upper 95% confidence level, and the broken dotted broken line (- · -) represents the lower 95% confidence level of the species accumulation curve (A). Upper and lower Coleman standard deviations are represented by solid black lines (B). Data obtained from stomach flushing or necropsy of American alligators from Florida and Georgia between 2008 and 2011. The rapid approach to the asymptote suggests we captured all possible species of alligator nematodes.
Figure 17 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 17. Histology of muted persistent coarse surfaces. A, attachment of m. puboischiofemoralis (FWC 40583, femur section b). B, fourth trochanter (FWC 40583, femur section b). Scale bars = 919 µm.
Figure 18 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 18. Individual variation in surface pattern and growth in Lake Griffin alligators. A, overprinted etched and dotted porosity (FWC 40723, femur). B, mainly smooth surface with faint scattered dotted porosity (FWC 40583, femur). C, fibrolamellar zones underlying porous surface shown in A (FWC 40723, femur section c). D, lamellar zones underlying smooth surface shown in B (FWC 40583, femur section c). Scale bars: A, B = 1 cm; C, D = 919 µm.
Figure 16 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 16. Histology of normal persistent coarse surfaces. A, Sharpey's fibres (arrows) visible as black thread-like structures beneath the bone surface (FWC LGS8, tibia section a). B, collateral ligament attachment site (FWC 40583, femur section e). C, fourth trochanter. Arrow indicates recently enclosed channel (FWC 40723, femur section b). D, attachment of m. puboischiofemoralis (FWC LGS1, femur section b). E, lateral (cranial) surface of deltopectoral crest (FWC 40723, humerus section b). F, humeral proximal cranial (ventral) surface. Arrows indicate recently enclosed channels (FWC 35119, humerus section a). Scale bars: A = 230 µm; B–F = 919 µm.
Figure 15. Histology underlying grossly smooth surface patterns. A in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 15. Histology underlying grossly smooth surface patterns. A, slight surface undulations (arrows) associated grossly with shallow dimples (FWC 40854, femur section b). B, smooth surface underlain by zone of lamellar bone (FWC 40583, humerus section c). C, smooth surface underlain by annulus. Arrows indicate annuli throughout cortex (FWC LGS8, tibia section d). Scale bars = 230 µm.
Figure 12 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 12. Possible geographical effect on the relationships between bone texture type and femur length body-size proxy for wild individuals of known sex. A, femora of Florida animals. B, tibiae of Florida animals. C, humeri of Florida animals. D, tibiae of Everglades animals only. E, humeri of Everglades animals only.
Figure 14. Histology underlying porous surface patterns. A in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 14. Histology underlying porous surface patterns. A, zone of fibrolamellar bone underlying etched porous surface (FWC 40723, tibia section c). B, fibrolamellar zone with large radial channels (arrow) underlying surface with overprinted dotted and etched porosity (FWC 40723, femur section c). C, longitudinal channels underlying radiating fibrous region, with arrows indicating channels intersecting and recently incorporated into the bone surface (FWC LGS4, femur section d). D, channels in varying orientations underlying dotted porous surface (FWC LGS1, femur section c). E, zone of lamellar bone underlying dotted porous surface (FWC 40583, humerus section c). Scale bars = 230 µm.
Figure 13 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 13. Relationships between bone texture type and cluster-based percentage maturity indices. Circle diameter proportional to number of individuals. A, femora: three individuals 25% mature, 21 individuals 50% mature, 61 individuals 75% mature, 24 individuals 100% mature. B, tibiae: one individual 0% mature, 16 individuals 33% mature, 24 individuals 67% mature, four individuals 100% mature. C, humeri: three individuals 0% mature, seven individuals 33% mature, 32 individuals 67% mature, six individuals 100% mature.
Figure 10 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 10. Relationships between bone texture type and femur length body-size proxy for individuals of known sex. A, male femora. B, female femora. C, male tibiae. D, female tibiae. E, male humeri. F, female humeri.
Figure 8 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 8. Examples of grossly smooth and muted persistent coarse surfaces. A, shallow surface dimples (arrows) (MOR HIP2001-08R-32, femur). B, smooth surface (FWC 40853, femur). C, muted texture, femoral fourth trochanter (FWC 40853). D, muted texture, femoral proximal lateral (dorsal) surface (FWC 40859). Scale bars = 1 cm.
Figure 2 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 2. Diagrammatic representation of Alligator long bones showing locations of thin sections used in histological analyses in relation to major bone contours. Elements are all drawn to the same scale and are not in proportion to one another as they would be in a single individual. A, femur, caudomedial (caudoventral) view. B, tibia, cranial view. C, humerus, cranial (ventral) view.
Figure 1 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 1. Diagrammatic representation of Alligator long bones illustrating bone landmarks used in determining sizeindependent maturity estimates. Elements are all drawn to the same scale and are not in proportion to one another as they would be in a single individual. Numbers correspond to character definitions in Appendix 1. A, femur, craniolateral (craniodorsal) view. B, femur, caudomedial (caudoventral) view. C, tibia, cranial view. D, tibia, caudal view. E, humerus, cranial (ventral) view. F, humerus, caudolateral (dorsocranial) view.
Figure 7 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 7. Examples of porous surface patterns. A, fuzzy fibrous pattern with visible pores (UF 109039, femur). B, fuzzy fibrous pattern without visible pores (UF 109039, humerus). C, etched porosity with connecting surface grooves (UF 38974, femur). D, etched porosity (FWC 35119, humerus). E, porous surface (top) grading into radiating fibrous surface (bottom) (FWC LGS1, femur). F, dotted porosity (FWC LGS2, femur). G, overprinted etched and dotted porosity, etched more prominent (ROM R4415, femur). H, overprinted etched and dotted porosity, dotted more prominent (FWC LGS1, femur). Scale bars = 1 cm.
Figure 4 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 4. Consensus results of cluster analyses of bone landmark characters. Distance metric is normalized percent disagreement. Complete linkage method (farthest neighbour). Numbers in parentheses represent ontogenetic stages. 'Groups' represent individuals of the same ontogenetic stage grouped together to reduce the size of the trees; included individuals are listed in Appendix 2. A, femur: tree based on distributions of characters 1, 4, 5, 8 and 10. B, tibia: tree based on distributions of characters 5, 6, 7, 8 and 9. C, humerus: tree based on distributions of characters 1, 3, 4, 6, 7 and 8.
Figure 6 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 6. Examples of persistent coarse surfaces. A, femoral fourth trochanter in caudomedial (caudoventral) view (FWC LGS2). B, femoral proximal lateral (dorsal) surface (FWC LGS1). C, humeral medial (caudal) condyle in caudomedial (dorsocaudal) view, collateral ligament attachment site (FWC 35119). D, humeral deltopectoral crest, lateral (cranial) surface (FWC LGS3). E, humeral deltopectoral crest, craniomedial (ventrocaudal) surface (FWC 35119). F, adductor ridges on caudal surface of femoral shaft (FWC LGS2). Proximal is toward the top in all images. Scale bars = 1 cm.
Figure 3 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 3. Strict consensus trees resulting from parsimony analyses. Numbered ontogenetic stages are defined in Table 2. A, femur: strict consensus of 34 281 trees, tree length = 18, CI = 0.3846. B, tibia: strict consensus of 357 trees, tree length = 13, CI = 0.5077. C, humerus: strict consensus of 36 trees, tree length = 15, CI = 0.4286.
Figure 9 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)
Figure 9. Relationship between bone texture type and femur length body-size proxy for all elements. A, femora. B, tibiae. C, humeri.
The influence of incubation temperature on offspring traits varies across northern and southern populations of the American alligator (Alligator mississippiensis)
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