Tegus and Nile Monitors Liz Barraco Florida Fish and Wildlife Conservation Commission Research Updates Nile monitor diet study UF Tegu telemetry study UF Tegu diet study FWC Nile Monitor Gut Content Analysis ID: 815362
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Updates on Current Research:Tegus and Nile MonitorsLiz Barraco Florida Fish and Wildlife Conservation Commission
Slide2Research UpdatesNile monitor diet study (UF)Tegu telemetry study (UF)Tegu diet study (FWC)
Slide3Nile Monitor Gut Content Analysis19 specimens (18 had contents, 16 >1 prey item) Amphibians: Marine Toad (Rhinella marina), Southern Leopard Frogs (Lithobates sphenocephalus), Reptiles: Brown Basilisk (Basiliscus vittatus)Eastern Glass Lizard (Ophisaurus
ventralis
)
Brown
Watersnake
(Nerodia taxispilota)Banded Watersnake (Nerodia fasciata)Corn Snake (Pantherophis guttatus), Three-striped Mud Turtle (Kinosternon baurii). Mammals: Hispid Cotton Rat (Sigmodon hispidus), Other: crustaceans, spiders, snails, parasites (Acanthocephalans, Nematode, and unknown), reptile eggs, insects (Formicidae, Pentatomidae, Coleoptera, Blattidae, Lepidoptera, Hemiptera, Curculionidae, Scarabaeoidea, Elateroidea, and Orthoptera), a fish, and plastic objects
Slide4Tegu TelemetryFemale tegu behaviorNestingSex ratio of clutch
Slide5`TuMe3807 April 2014 – 18 June 201423 May 201418 eggs18 June 201414 viable
Slide6TuMe40921 April 2014 – 11 June 2014
Slide7TuMe4405 May 2014 – 18 June 2014Tracked to multiple locations25 June 201427 eggs25 hatched
Slide8Tegu TelemetryTegu IDSVL (cm)Mass (kg)Monitoring period (days)Number of locationsMean daily distance moved (m)
95%
KDE (m2)
50% KDE (m2)
TuMe38033.51.167229234,2386,991TuMe40931.51.16512017325,64889,753TuMe44035.51.2
4418
9
165,605
22,014
Slide9Tegu TelemetryFemale tegu behaviorNestingTwo different nest structuresSex ratio of clutchesUpcoming
Slide10Tegu Gut Contents Analysis
Slide11Tegu Gut Contents Analysis
Slide12Tegu Gut Contents AnalysisCategoryFrequency of OccurrenceCrustacea8%Gastropoda
26%
Insecta
71%
Plantae
60%Vertebrates39%Eggs8%
Slide13Tegu Gut Contents AnalysisInsecta (89; 71%)24 familiesRomaleidae (60; 67%)Lubber grasshopper, Romalea guttataCarabidae (17; 19%)Scarabidae (11; 12%)
Slide14Tegu Gut Contents AnalysisPlantae (76; 60%)17 families, 26 speciesChrysobalanaceae (20; 26%)Cocoplum, Chrysobalanaus icacoArecaceae (20; 26%)Anacardiaceae (16; 21%)Poisonwood, Metopium toxiferum
Slide15Tegu Gut Contents AnalysisVertebrates (49; 39%)Mammalia (28; 57%)Cricetidae (16; 57%)Cotton rat, Sigmodon hispidus Opossum, black rat, catRepitilia (9; 18%)Snakes (4; 45%)Lizards, turtles
Slide16Tegu Gut Contents AnalysisVaried diet75% had multiple diet itemsWhere are the eggs?Statistical analysisSize classGenderCollection locationCollection dateBody condition
Slide17I hope you have enjoyed your lizard update!