Plasma vitellogenin in Morelet's crocodiles from contaminated habitats in northern Belize

Rainwater, Thomas R.; Selcer, Kyle W.; Nespoli, Lisa M.; Finger, Adam G.; Ray, David A.; Smith, Philip; Densmore, Llewellyn D.; Anderson, Todd A.; McMurry, Scott T.

doi:10.1016/j.envpol.2007.07.018

Cited by 12 publications

(5 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sample collection: From 1998 to 2000, as part of ongoing studies of the status, ecology, and ecotoxicology of Morelet's Crocodile (Platt, '96;Platt and Thorbjarnarson, 2000;Platt et al, , 2006Rainwater, 2003;Wu et al, 2006;Rainwater et al, 2007Rainwater et al, , 2008, crocodile nests were located and monitored at two localities in northern Belize, Gold Button Lagoon (GBL), and New River Watershed (NRW (Rhodes and Lang,'95), and maintained in natural nest material until hatching. Upon hatching, each neonate was measured, marked, and maintained in captivity for 2-4 weeks, after which sex was determined by cloacal examination of the genitalia (Allsteadt and Lang,'95).…”

Section: Methodsmentioning

confidence: 99%

Evidence of multiple paternity in Morelet's Crocodile (Crocodylus moreletii) in Belize, CA, inferred from microsatellite markers

et al. 2008

Self Cite

View full text Add to dashboard Cite

Microsatellite data were generated from hatchlings collected from ten nests of Morelet's Crocodile (Crocodylus moreletii) from New River Lagoon and Gold Button Lagoon in Belize to test for evidence of multiple paternity. Nine microsatellite loci were genotyped for 188 individuals from the 10 nests, alongside 42 nonhatchlings from Gold Button Lagoon. Then mitochondrial control region sequences were generated for the nonhatchlings and for one individual from each nest to test for presence of C. acutus-like haplotypes. Analyses of five of the nine microsatellite loci revealed evidence that progeny from five of the ten nests were sired by at least two males. These data suggest the presence of multiple paternity as a mating strategy in the true crocodiles. This information may be useful in the application of conservation and management techniques to the 12 species in this genus, most of which are threatened or endangered.

show abstract

Section: Methodsmentioning

confidence: 99%

Evidence of multiple paternity in Morelet's Crocodile (Crocodylus moreletii) in Belize, CA, inferred from microsatellite markers

et al. 2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…Dieldrin, DDE, alpha‐endosulfan, heptachlor epoxide, and oxy‐chlordane are all major metabolites of aldrin, DDT, endosulfan, heptachlor, and chlordane, respectively. Each of these parent compounds and its metabolites are believed to have endocrine‐disrupting properties , which have detrimental effects on reproduction and development . Dieldrin and DDT were banned in Costa Rica in 1988, followed by heptachlor and chlordane in 1990, and no importation of mirex occurred after 1993.…”

Section: Resultsmentioning

confidence: 99%

“…Research into the level at which multiple pesticides become biologically relevant and trigger health effects in crocodilians are limited . However, exposure to pesticides has been implicated with detrimental effects on crocodilian reproduction and development in other studies . Pesticides may disrupt endocrine systems by acting as anti‐hormones or alter enzymes responsible for hormone synthesis and degradation .…”

Section: Resultsmentioning

confidence: 99%

“…Samples were then shipped to the Institute of Ocean Sciences (Sidney, British Columbia, Canada) and stored at −80 °C until pesticide analysis at AXYS Analytical Services (Sidney, British Columbia, Canada). Blood has been used in previous contaminant studies of crocodilians . All caiman were treated in accordance with the principles of the Canadian Council on Animal Care.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Pesticides in blood from spectacled caiman (Caiman crocodilus) downstream of banana plantations in Costa Rica

Grant¹,

Woudneh

Ross

2013

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Spectacled caiman (Caiman crocodilus) are fish-eating crocodilians that inhabit freshwater habitat in tropical regions of the Americas. To assess the exposure of caiman to pesticides from banana plantations, the authors collected whole blood samples (30 mL) from 14 adult caiman that were captured in the North Atlantic region of Costa Rica. Blood samples were analyzed for 70 legacy- and current-use pesticides and breakdown products using newly developed ultra-trace, high-resolution mass spectrometry (HRMS). Caiman accumulated pesticides ranked by concentration as dieldrin > permethrin > mirex > 4,4'-DDE > alpha-endosulfan > heptachlor epoxide > oxychlordane > heptachlor > cypermethrin. Caiman within the high-intensity banana crop watershed of Rio Suerte had higher pesticide burdens relative to other more remote locations (F = 12.79; p = 0.00). Pesticide concentration decreased with distance from upstream banana plantations in this river system (F = 20.76; p = 0.00). Caiman body condition was negatively correlated with total pesticide concentrations (F = 6.23; p = 0.02) and with proximity to banana plantations (F = 5.05; p = 0.04). This suggests that either pesticides elicited toxic effects in caiman, resulting in diminished overall health, or that the quantity or quality of their prey was reduced by pesticides downstream of plantation waterways. The authors' results indicate that pesticide use in banana plantations is impacting a high trophic level species inhabiting one of the most important wilderness areas in Costa Rica (Tortuguero National Park).

show abstract

“…Vitellogenin previously has been used as a biomarker of endocrine disruption in wildlife, since it can be induced upon exposure to exogenous natural estrogens and environmental xenoestrogens (Sumpter & Jobling, 1995;Palmer, Huth, Pieto, & Selcer, 1998;Hutchinson & Pickford, 2002). However, Vtg was only detected in adult females that were collected during the breeding season (Rainwater et al, 2008). However, Vtg was only detected in adult females that were collected during the breeding season (Rainwater et al, 2008).…”

Section: Cis-nonachlormentioning

confidence: 99%

Endocrine Disruption of Reproduction in Reptiles

Boggs

Botteri

Hamlin

et al. 2011

Hormones and Reproduction of Vertebrates

View full text Add to dashboard Cite

Plasma vitellogenin in Morelet's crocodiles from contaminated habitats in northern Belize

Cited by 12 publications

References 63 publications

Evidence of multiple paternity in Morelet's Crocodile (Crocodylus moreletii) in Belize, CA, inferred from microsatellite markers

Evidence of multiple paternity in Morelet's Crocodile (Crocodylus moreletii) in Belize, CA, inferred from microsatellite markers

Pesticides in blood from spectacled caiman (Caiman crocodilus) downstream of banana plantations in Costa Rica

Endocrine Disruption of Reproduction in Reptiles

Contact Info

Product

Resources

About