Results 101 to 110 of about 9,047 (212)
Proctolin and an Endogenous Proctolin-Like Peptide Enhance the Contractility of the Limulus Heart [PDF]
, 1983 Synthetic proctolin increases the force but not the rate of heart contractions of Limulus in a time- and dose-dependent manner. The threshold of this effect is 3 × 10−10M and the ED50 is approximately 10−8M. At concentrations up to 10−7 M, proctolin has
Augustine, George J. +2 more
core +2 more sources
When a Fish is a Fish: The Economic Impacts of Escaped Farmed Fish [PDF]
The escape of cultured fish from a marine aquaculture facility is a type of biological invasion that may lead to a variety of potential ecological and economic effects on native fish. This paper develops a general invasive species impact model to capture
Anders Skonhoft +2 more
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Chalk streams and grazing mute swans [PDF]
, 2014 The evidence shows that swan grazing can reduce plant abundance, prevent flowering, reduce water depth and reduce fishery value. However, these effects seem to be limited to a small number of sites on larger chalk streams.
Daunt, Francis +3 more
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Knowledge and Management of Aquatic EcosystemsRecent molecular analyses of the stone crayfish have revealed a high degree of genetic diversity. The greatest diversity is found in the western Balkans (Dinarides), where more than half of the known phylogroups exist in a relatively small geographical ...
Zorić Katarina +6 more
doaj +1 more source
Arkansas Endemic Biota: An Update with Additions and Deletions [PDF]
, 2008 It has been over a decade since the publication of Robison and Allen (1995) that provided the definitive list of endemic flora and fauna of Arkansas. The present study brings up-to-date the endemic biota of the state. Since 1995, several new species have
Carlton, C. +3 more
core +1 more source
Status and Distribution of the Gapped Ringed Crayfish, Orconectes neglectus chaenodactylus, in Arkansas [PDF]
, 2010 Orconectes neglectus chaenodactylus, the gapped ringed crayfish, is an uncommon and poorly-known, stream-dwelling crayfish that is endemic to the central White River basin of Arkansas and Missouri.
Kottmyer, Mark D. +2 more
core +1 more source
On the conservation of white-clawed crayfish in the Iberian Peninsula: Unraveling its genetic diversity and structure, and origin. [PDF]
PLoS One, 2023 Martínez-Ríos M +5 more
europepmc +1 more source
Effects of Mosquito Control Chemicals on Aquatic Fauna [PDF]
, 1974 No mosquito abatement districts have ever been organized in Arkansas. Mosquito control efforts have been largely adulticiding operations by either aerial application or ground thermal fogging machines.
Lancaster, J. L., Jr., Meisch, M. V.
core +2 more sources
Endangered and Threatened Crayfishes (Decapoda: Cambaridae) [PDF]
, 1986 Author Institution: Department of Zoology, The Ohio State University at NewarkField studies during the past five years indicate that the crayfish Orconectes obscurus (Hagen) is not an endangered species. However, the introduction of 0.
Jezerinac, Raymond F.
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