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Darsie Jr. R.F.,Grove City College | Taylor D.S.,Brevard County Environmentally Endangered Lands Program | Prusak Z.A.,Nature Conservancy | Verna T.N.,Burlington County Mosquito Control
Journal of the American Mosquito Control Association | Year: 2010

This up-to-date checklist of the mosquitoes of the Bahamas includes 8 genera and 34 species. Three species new to the Bahamas are Culex chidesteri, Culex bisulcatus, and Psorophora insularia. The status of Culex antillummagnorum in the Bahamas is discussed. Keys to the adult females and fourth-stage larvae are given. © 2010 by The American Mosquito Control Association, Inc. Source

Tatarenkov A.,University of California at Irvine | Earley R.L.,University of Alabama | Taylor D.S.,Brevard County Environmentally Endangered Lands Program | Avise J.C.,University of California at Irvine
Integrative and Comparative Biology | Year: 2012

The mangrove rivulus Kryptolebias marmoratus and a closely related species are the world's only vertebrates that routinely self-fertilize. Such uniqueness presents a model for understanding why this reproductive mode, common in plants and invertebrates, is so rare in vertebrates. A survey of 32 highly polymorphic loci in >200 specimens of mangrove rivulus from multiple locales in the Florida Keys, USA, revealed extensive population-genetic structure on microspatial and micro-temporal scales. Observed heterozygosities were severely constrained, as expected for a hermaphroditic species with a mixed-mating system and low rates of outcrossing. Despite the pronounced population structure and the implied restrictions on effective gene flow, isogenicity (genetic identity across individuals) within and among local inbred populations was surprisingly low even after factoring out probable de novo mutations. Results indicate that neither frequent bottlenecks nor directional genetic adaptation to local environmental conditions were the primary driving forces impacting multilocus population-genetic architecture in this self-fertilizing vertebrate species. On the other hand, a high diversity of isogenic lineages within relatively small and isolated local populations is consistent with the action of diversifying selection driven by the extreme spatio-temporal environmental variability that is characteristic of mangrove habitats. © 2012 The Author 2012. Published by Oxford University Press on behalf of the Society for Integrative and Comparative Biology. All rights reserved. For permissions please email: journals.permissions@oup.com. Source

Taylor D.S.,Brevard County Environmentally Endangered Lands Program
Integrative and Comparative Biology | Year: 2012

Although first described in 1880, Kryptolebias marmoratus avoided scientific scrutiny until 1961, when it was identified as the only known selfing hermaphroditic vertebrate. The subsequent intense interest in this fish as a laboratory animal, continuing to this day, might explain the paucity of wild collections, but our collective knowledge now suggests that the inherent difficulty of wild collection is more a matter of "looking in all the wrong places." Long thought to be rare in the mangroves, and it is rare in certain human-impacted habitats, K. marmoratus can be quite abundant, but in microhabitats not typically targeted by ichthyologists: ephemeral pools at higher elevations in the swamp, crab burrows, and other fossorial or even terrestrial haunts. Field studies of this enigmatic fish have revealed almost amphibious behaviors. During emersion these fish tolerate extended dry periods. In water, they are exposed to temperature extremes, high levels of hydrogen sulfide, and depleted dissolved oxygen. Finally, their catholic diet and a geographically variable sex life completes a portrait of an unusual animal. A clearer picture is emerging of adult life, with initial population density estimates now known and some indication of high population turnover in burrows, but juvenile habitat and adult oviposition sites remain unknown. © 2012 The Author 2012. Published by Oxford University Press on behalf of the Society for Integrative and Comparative Biology. All rights reserved. For permissions please email: journals.permissions@oup.com. Source

Taylor D.S.,Brevard County Environmentally Endangered Lands Program
Wetlands Ecology and Management | Year: 2012

Estuarine saltmarshes are widely recognized as highly productive and biologically diverse systems. The Indian River Lagoon (IRL) is a 250 km long "Estuary of National Significance" along Florida's east coast and is known as one of North America's most diverse estuaries. Like most North American estuaries, the IRL is facing a number of problems, among them loss of emergent wetlands. Between 75 and 90% of the original mangrove and saltmarsh acreage historically bordering the IRL has been lost or impacted, either through direct filling for development or impoundment for mosquito control. This loss has affected IRL water quality and fisheries, since these habitats are now removed from the estuarine system. Active programs are now underway to restore mosquito impoundments by reconnection with culverts or removal of dikes, but restoration of dredge spoil is more problematic, as many of these sites have been developed. However, where undeveloped spoil is found on public lands, restoration is a possibility. One such site, Pine Island Conservation Area (PICA), jointly owned by the Brevard County Environmentally Endangered Lands Program and the St. Johns River Water Management District, contained 25. 4 ha of dredge spoil, originating from 1969, when the property was owned by a development company. Following public acquisition in 1996, plans were developed to remove the spoil and restore the site to historic saltmarsh elevation. Between 2003 and 2006 all of the material was removed and the restoration of normal hydrology has resulted in 'volunteer' recruitment by appropriate marsh vegetation, without a need for any plantings. © 2011 Springer Science+Business Media B.V. Source

Tatarenkov A.,University of California at Irvine | Earley R.L.,University of Alabama | Perlman B.M.,Wake forest University | Scott Taylor D.,Brevard County Environmentally Endangered Lands Program | And 2 more authors.
Journal of Heredity | Year: 2015

We used 32 polymorphic microsatellite loci to investigate how a mixed-mating system affects population genetic structure in Central American populations (N = 243 individuals) of the killifish Kryptolebias marmoratus (mangrove rivulus), 1 of 2 of the world's only known self-fertilizing vertebrates. Results were also compared with previous microsatellite surveys of Floridian populations of this species. For several populations in Belize and Honduras, population structure and genetic differentiation were pronounced and higher than in Florida, even though the opposite trend was expected because populations in the latter region were presumably smaller and highly selfing. The deduced frequency of selfing (s) ranged from s = 0.39-0.99 across geographic locales in Central America. This heterogeneity in selfing rates was in stark contrast to Florida, where s > 0.9. The frequency of outcrossing in a population (t = 1 - s) was tenuously correlated with local frequencies of males, suggesting that males are one of many factors influencing outcrossing. Observed distributions of individual heterozygosity showed good agreement with expected distributions under an equilibrium mixed-mating model, indicating that rates of selfing remained relatively constant over many generations. Overall, our results demonstrate the profound consequences of a mixed-mating system for the genetic architecture of a hermaphroditic vertebrate. © 2015 © The American Genetic Association 2015. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. Source

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