Results 21 to 30 of about 277,265 (209)

Overlooked keystone species in conservation plans of fluvial ecosystems in Southeast Europe: a review of native freshwater crayfish species

open access: yesKnowledge and Management of Aquatic Ecosystems, 2022
Although a large number of rivers stretches in Southeast Europe (SEE) have a pristine status compared to the rest of Europe, these ecosystems and their freshwater biodiversity are perceptibly threatened.
Danilović Milan   +2 more
doaj   +1 more source

Influence of water regulation and water flow on Noble crayfish (Astacus astacus) catch yield in Ljungan a Northern Swedish River after building of a power plant

open access: yes, 2010
Free-flowing water is thought to be of importance for reproduction and body growth of noble crayfish (Astacus astacus (Linné)) in the northern edge of its distribution area.A hydroelectric power plant with a bypass tunnel was built in the river Ljungan ...
Palo, Thomas,, Zimmerman, Jenny,
core   +9 more sources

The freshwater and land crayfish of Australia [PDF]

open access: yesMemoirs of the National Museum, Melbourne, 1938
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

HAZARD ANALYSIS OF EXOTIC PATHOGENS OF POTENTIAL THREAT TO EUROPEAN FRESHWATER CRAYFISH.

open access: yesKnowledge and Management of Aquatic Ecosystems, 2002
Managers, scientists, fishermen and farmers who work with freshwater crayfish understand clearly the severe affects that the introduction of an exotic pathogen can have on freshwater crayfish populations.
EDGERTON B. F.
doaj   +1 more source

The amount of environmental DNA increases with freshwater crayfish density and over time

open access: yesEnvironmental DNA, 2022
Over the last years, the analysis of environmental DNA (eDNA) has become an important approach to investigate species communities. Due to its non‐invasive nature and high sensitivity, this method is excellently suited to monitor the occurrence of ...
Daniela Sint   +4 more
doaj   +1 more source

Ecological plasticity and commercial impact of invasive marbled crayfish populations in Madagascar

open access: yesBMC Ecology, 2019
Background The marbled crayfish (Procambarus virginalis) is a monoclonal, parthenogenetically reproducing freshwater crayfish species that has formed multiple stable populations worldwide.
Ranja Andriantsoa   +6 more
doaj   +1 more source

Human Dimensions and Visitors’ Perspective in Freshwater Crayfish Conservation: The Case of a Protected Area in Italy

open access: yesDiversity, 2023
Human dimensions in endangered species conservation are often overlooked. However, including human dimensions in conservation projects can help conservationists integrate social and ecological dimensions and investigate individual or society’s ...
Elena Mercugliano   +7 more
doaj   +1 more source

Double blow: Alien crayfish infected with invasive temnocephalan in South African waters

open access: yesSouth African Journal of Science, 2013
Trade in live, freshwater crayfish for ornamental markets, as well as for aquaculture, has grown rapidly and has become the major pathway for the introduction of non-indigenous crayfish species to several countries worldwide.
Louis du Preez, Nico Smit
doaj   +1 more source

Land use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealand [PDF]

open access: yes, 1997
The density and biomass of fish and crayfish, and the production of eels, was compared among streams in native forest, exotic forest, and pasture. Populations were estimated by multiple-pass electroshocking at 11 sites in hill-country streams in the ...
Hicks, Brendan J.   +3 more
core   +1 more source

Flow cytometric characterization of freshwater crayfish hemocytes for the examination of physiological status in wild and captive animals [PDF]

open access: yes, 2009
Enumeration of invertebrate hemocytes is a potentially powerful tool for the determination of physiological effects of extrinsic stressors, such as hypoxia, disease, and toxicant exposure.
Landman, Michael J.   +5 more
core   +1 more source

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