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Institution

Alabama Department of Conservation and Natural Resources

GovernmentEnterprise, Alabama, United States
About: Alabama Department of Conservation and Natural Resources is a government organization based out in Enterprise, Alabama, United States. It is known for research contribution in the topics: Population & Threatened species. The organization has 58 authors who have published 84 publications receiving 1397 citations.


Papers
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Journal ArticleDOI
TL;DR: Comparison of modern to background extinction rates reveals that gastropods have the highest modern extinction rate yet observed, 9,539 times greater than background rates.
Abstract: This is the first American Fisheries Society conservation assessment of freshwater gastropods (snails) from Canada and the United States by the Gastropod Subcommittee (Endangered Species Committee). This review covers 703 species representing 16 families and 93 genera, of which 67 species are considered extinct, or possibly extinct, 278 are endangered, 102 are threatened, 73 are vulnerable, 157 are currently stable, and 26 species have uncertain taxonomic status. Of the entire fauna, 74% of gastropods are imperiled (vulnerable, threatened, endangered) or extinct, which exceeds imperilment levels in fishes (39%) and crayfishes (48%) but is similar to that of mussels (72%). Comparison of modern to background extinction rates reveals that gastropods have the highest modern extinction rate yet observed, 9,539 times greater than background rates. Gastropods are highly susceptible to habitat loss and degradation, particularly narrow endemics restricted to a single spring or short stream reaches. Compil...

172 citations

Journal ArticleDOI
TL;DR: In the absence of technical data these popular occurrences called “jubilees” provide over a century of historical evidence of oxygen depletion in Mobile Bay, Alabama, one of the largest estuaries on the Gulf of Mexico.
Abstract: Extensive areas of bottom water in Mobile Bay, Alabama, one of the largest estuaries on the Gulf of Mexico, suffer oxygen depletion in summer because of salinity stratification in sinks created by shoals in the lower bay land by spoil from construction of the Mobile Ship Channel. When these water masses low in dissolved oxygen are occasionally forced against the beach demersal fishes and crustaceans migrate shoreward in a depressed or moribund state. In the absence of technical data these popular occurrences called “jubilees” provide over a century of historical evidence of oxygen depletion. Oxygen depletion and jubilees occurred in the bay before man physically modified the basin but the conditions responsible for oxygen depletion are worse than in the past. Because of bathymetric changes and modifications which have restricted water circulation, Mobile Bay has exceeded its capacity to assimilate its oxygen demand in summer, which has severely affected the biota of the estuary.

118 citations

Journal ArticleDOI
TL;DR: Two androgens and two estrogens were orally administered to gonadally undifferentiated Sarotherodon niloticus fry to result in 100% female populations but only about 10% of the DES-100 treatment populations at the three durations were males.

92 citations

Journal ArticleDOI
TL;DR: The authors in this article assessed the extinction risk of 1428 randomly selected freshwater molluscs using the IUCN Red List Categories and Criteria, as part of the Sampled Red List Index project.
Abstract: With the biodiversity crisis continuing unchecked, we need to establish levels and drivers of extinction risk, and reassessments over time, to effectively allocate conservation resources and track progress towards global conservation targets. Given that threat appears particularly high in freshwaters, we assessed the extinction risk of 1428 randomly selected freshwater molluscs using the IUCN Red List Categories and Criteria, as part of the Sampled Red List Index project. We show that close to one-third of species in our sample are estimated to be threatened with extinction, with highest levels of threat in the Nearctic, Palearctic and Australasia and among gastropods. Threat levels were higher in lotic than lentic systems. Pollution (chemical and physical) and the modification of natural systems (e.g. through damming and water abstraction) were the most frequently reported threats to freshwater molluscs, with some regional variation. Given that we found little spatial congruence between species richness patterns of freshwater molluscs and other freshwater taxa, apart from crayfish, new additional conservation priority areas emerged from our study. We discuss the implications of our findings for freshwater mollusc conservation, the adequacy of a sampled approach and important next steps to estimate trends in freshwater mollusc extinction risk over time.

58 citations

Journal ArticleDOI
TL;DR: Chemical treatments were used to produce sex-reversed female (genetic male) Tilapia aurea, which can be bred to produce monosex offspring, and Diethylstilbestrol was as potent as EE in comparable CA treatments.

58 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20219
202012
20196
20182
20173
20167