Capsaicin-treated bait is ineffective in deterring non-target mammals from trap disturbance during invasive lizard control DOI Creative Commons
Lance D. McBrayer, Daniel Haro, Michael L. Brennan

et al.

NeoBiota, Journal Year: 2023, Volume and Issue: 87, P. 103 - 120

Published: Aug. 17, 2023

Excluding non-target species from invasive control efforts can be challenging due to attraction trap structure, baits, and lures. Various methods have been used deter entering or disturbing traps including altered features (e.g., mesh size, trip mechanism, entrances), staking traps, chemical deterrents. Invasive populations of Argentine Black White Tegu lizards ( Salvator merianae ) occur in several locations across Florida Georgia, there are ongoing trapping them. At sites mammals disturb most the lizard (>80%), consume egg bait/lures, thus reduce efficacy. In contrast, our site has fewer problems with mammals. Our goal was quantify efficacy capsaicin-coated eggs, a known distasteful irritant mammals, as bait deterrent live set for tegus both Georgia Florida. We conducted feeding assays on three found that individuals readily consumed food coated capsaicin. then three-part, experiment test 1) if disturbance by habituated eggs without capsaicin decreased when were deployed 2) not (treated untreated) disturbed at same rate those 3) tegu capture rates different treated we did decrease applied an area previously this nor novel area. Florida, no significant difference captures using capsaicin-treated vs. untreated bait. Tegus tolerant capsaicin, but mammal traps. Therefore, removal could problematic non-targets identified deployed.

Language: Английский

Argentine Black and White Tegu (Salvator merianae) can survive the winter under semi-natural conditions well beyond their current invasive range DOI Creative Commons
Scott M. Goetz, David A. Steen, Melissa A. Miller

et al.

PLoS ONE, Journal Year: 2021, Volume and Issue: 16(3), P. e0245877 - e0245877

Published: March 10, 2021

The Argentine Black and White Tegu ( Salvator merianae , formerly Tupinambis ) is a large lizard from South America. Now established invasive in southern Florida, it poses threats to populations of many native species. Models suggest much the United States may contain suitable temperature regimes for this species, yet there considerable uncertainty regarding either potential range expansion northward out tropical subtropical zones or species establishing elsewhere following additional independent introductions. We evaluated survival, body temperature, duration timing winter dormancy, health wild-caught tegus Florida held semi-natural enclosures over year Auburn, Alabama (> 900 km northwest capture location). Nine twelve lizards emerged dormancy seven survived greater-than-one-year study. Average length (176 d) was greater than that reported females remained dormant longer males. Tegus grew rapidly throughout study presence sperm testes males previtellogenic early vitellogenic follicles female ovaries at end our animals would have been capable reproduction spring. survival overall majority adult suggests weather climate patterns are unlikely prevent introduction areas far their current range.

Language: Английский

Citations

19
How to estimate body condition in large lizards? Argentine black and white tegu (Salvator merianae, Duméril and Bibron, 1839) as a case study DOI Creative Commons
Kelly R. McCaffrey, Sergio A. Balaguera‐Reina, Bryan G. Falk

et al.

PLoS ONE, Journal Year: 2023, Volume and Issue: 18(2), P. e0282093 - e0282093

Published: Feb. 24, 2023

Body condition is a measure of the health and fitness an organism represented by available energy stores, typically fat. Direct measurements fat are difficult to obtain non-invasively, thus body usually estimated calculating indices (BCIs) using mass length. The utility BCIs contingent on relationship fat, thereby validation studies should be performed select best performing BCI before application in ecological investigations. We evaluated 11 883 Argentine black white tegus ( Salvator merianae ) removed from their non-native range South Florida, United States. Because length-mass allometric, segmented linear regression model was fit between length define size classes. percent, residual, scaled determined percent because it least-associated with snout-vent (SVL). performance full dataset within classes identified Fulton’s K as for our sampled population, explaining up 19% variation content. Overall, we found that BCIs: 1) maintained relatively weak relationships measures 2) splitting data into reduced strength (i.e., bias) SVL but did not improve BCIs. postulate likely due association SVL, plan life-history traits tegus, potentially inadequate accounting resources. caution against assuming strong indicators across species suggest implemented, or alternative complimentary considered.

Language: Английский

Citations

7
When to target control efforts? Using novel GPS telemetry to quantify drivers of invasive Argentine black and white tegu (Salvator merianae) movement DOI
Brittany M. Mason, Sergio A. Balaguera‐Reina, Adam R. Benjamin

et al.

Biological Invasions, Journal Year: 2024, Volume and Issue: 26(6), P. 1769 - 1785

Published: March 6, 2024

Language: Английский

Citations

1
Within- and Trans-Generational Environmental Adaptation to Climate Change: Perspectives and New Challenges DOI Creative Commons
Naim M. Bautista, Amélie Crespel

Frontiers in Marine Science, Journal Year: 2021, Volume and Issue: 8

Published: Sept. 22, 2021

The current and projected impacts of climate change are shaped by unprecedented rates in environmental conditions. These changes likely mismatch the existing coping capacities organisms within-generations impose challenges for population resilience across generations. To better understand scenarios on organismal fitness maintenance, it is crucial to consider integrate proximate sources variability plastic adaptive responses future empirical approaches. Here we explore implications considering: (a) different time-scale events change; (b) from embryonic adult developmental stages; (c) importance considering species life-history traits; (d) influence trans-generational effects individual survival maintenance. Finally, posit a list with questions approaches that will help elucidate knowledge gaps, inform conservation management actions preserving ecosystems biodiversity.

Language: Английский

Citations

10
Using Camera Traps to Estimate Site Occupancy of Invasive Argentine Black and White Tegus (Salvator merianae) in South Florida DOI

Samantha N. Smith,

Melissa A. Miller, J. Hardin Waddle

et al.

Southeastern Naturalist, Journal Year: 2024, Volume and Issue: 23(4)

Published: Dec. 10, 2024

The introduction of nonnative species is a leading cause biodiversity loss. Many invasive are cryptic or elusive in nature and therefore often evade detection, complicating their management. Occupancy modeling can reveal the presence spread over time has important management implications. Camera traps be used to estimate occupancy, proportion sites that occupied by target species. During 4-year study (2016–2020), we camera both with without lures detect Salvator merianae (Argentine Black White Tegu) at Miami-Dade County, FL. Our results from multi-season occupancy model revealed quadratic effect ordinal day was best predictor peak June, while correlated distance landscape features may facilitate tegu movement. We did not any large-scale changes course our study. also discovered use impact indicating fewer resources would required managers for effective monitoring. Understanding factors detection probabilities inform surveillance removal efforts, more efficient strategies.

Language: Английский

Citations

0
Testicular abnormalities in the invasive Argentine Black-and-White Tegu (Salvator merianae) in the Florida Everglades DOI Creative Commons
KYRA S. WOYTEK, Gretchen Anderson,

Kevin Donmoyer

et al.

Reptiles & Amphibians, Journal Year: 2023, Volume and Issue: 30(1), P. e19517 - e19517

Published: June 5, 2023

Language: Английский

Citations

1
Invading nonnative frogs use different microhabitats and change physiology along an elevation gradient DOI

Jack R. Marchetti,

Susannah S. French, Emily E. Virgin

et al.

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Journal Year: 2023, Volume and Issue: 341(1), P. 73 - 85

Published: Oct. 30, 2023

Abstract The coqui frog ( Eleutherodactylus ) was introduced to the island of Hawai'i in 1980s, and has spread across much island. There is concern they will invade higher elevation areas where negative impacts on native species are expected. It not known if change behavior baseline physiology ways that allow them elevations. We investigated found whether includes recent invasion into also related coqui's microhabitat use, including substrate use height off forest floor, physiological metrics, plasma osmolality, oxidative status, glucose, free glycerol, triglycerides, might be associated with invading have increased area occupy along roads from 31% 50% moved more high‐elevation locations (16% vs. 1%) compared were 14 years ago. frogs at high different substrates closer floor than lower elevations—perhaps response air temperatures which tended warmer close floor. observed blood glucose triglycerides increase elevation. An likely an acclimation cold while may help cope energetic demands suboptimal temperatures. Finally, we female reactive oxygen metabolites (dROMs), males. Our study suggests influenced by

Language: Английский

Citations

1
The Soil Ecosystem at the Tropics DOI
Tancredo Souza

Springer eBooks, Journal Year: 2022, Volume and Issue: unknown, P. 1 - 22

Published: Jan. 1, 2022

Language: Английский

Citations

1
Biological Flora of Coastal Freshwater and Brackish Marshes: Cladium jamaicense Crantz DOI

Richard Stalter,

Robert I. Lonard

Journal of Coastal Research, Journal Year: 2023, Volume and Issue: 39(4)

Published: July 4, 2023

Stalter, R. and Lonard, R.I., 2023. Biological flora of coastal freshwater brackish marshes: Cladium jamaicense Crantz. Journal Coastal Research, 39(4), 763–776. Charlotte (North Carolina), ISSN 0749-0208. Crantz, also known as sawgrass, has a broad distributional range from the Atlantic coast Virginia to Florida, southern Texas, Caribbean, along Mexico Central America, Brazil. typically occurs in oligotrophic sloughs fresh marshes where optimal salinity values 0 3.5 ppt. This species is long-lived perennial with highly developed rhizome system rhizomes up 20 cm long 2.5 10 mm diameter. Asexual reproduction common. Its fibrous root comprises short dauciform roots characterized by dense number hairs. Culms are 1.0 3.0 m tall. Leaf blades coarse, flat, or broadly involute; leaf margins abaxial midvein have sharp, hacksaw-like teeth. Typha domingensis (cattail) C. jamaicense's most important competitor, especially sites that been enhanced phosphorus. Restoration sawgrass requires managing long-term changes ecosystem functions hydrological management strategies.

Language: Английский

Citations

0
Capsaicin-treated bait is ineffective in deterring non-target mammals from trap disturbance during invasive lizard control DOI Creative Commons
Lance D. McBrayer, Daniel Haro, Michael L. Brennan

et al.

NeoBiota, Journal Year: 2023, Volume and Issue: 87, P. 103 - 120

Published: Aug. 17, 2023

Excluding non-target species from invasive control efforts can be challenging due to attraction trap structure, baits, and lures. Various methods have been used deter entering or disturbing traps including altered features (e.g., mesh size, trip mechanism, entrances), staking traps, chemical deterrents. Invasive populations of Argentine Black White Tegu lizards ( Salvator merianae ) occur in several locations across Florida Georgia, there are ongoing trapping them. At sites mammals disturb most the lizard (>80%), consume egg bait/lures, thus reduce efficacy. In contrast, our site has fewer problems with mammals. Our goal was quantify efficacy capsaicin-coated eggs, a known distasteful irritant mammals, as bait deterrent live set for tegus both Georgia Florida. We conducted feeding assays on three found that individuals readily consumed food coated capsaicin. then three-part, experiment test 1) if disturbance by habituated eggs without capsaicin decreased when were deployed 2) not (treated untreated) disturbed at same rate those 3) tegu capture rates different treated we did decrease applied an area previously this nor novel area. Florida, no significant difference captures using capsaicin-treated vs. untreated bait. Tegus tolerant capsaicin, but mammal traps. Therefore, removal could problematic non-targets identified deployed.

Language: Английский

Citations

0