Results 31 to 40 of about 22,005 (227)

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

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 ...
Cairns D., Hicks B. J., Hopkins C. L.
core   +2 more sources

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

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

Hidden Dangers to Researcher Safety While Sampling Freshwater Benthic Macroinvertebrates [PDF]

open access: yes, 2020
This paper reviews hidden dangers that threaten the safety of freshwater (FW) researchers of benthic macroinvertebrates (BMIs). Six refereed journals containing 2,075 papers were reviewed for field research resulting in 505 FW BMI articles.
Stoaks, Ralph D.
core   +2 more sources

The Freshwater Crayfishes of Australia

open access: yesProceedings of the Zoological Society of London, 1912
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +3 more sources

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents. [PDF]

open access: yes, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Biggs B., Lester P. J., Main M. L.
core   +2 more sources

Bioaccumulation of environmental contaminants in crayfish: monitoring aquatic pollution and food safety risks

open access: yesCyTA - Journal of Food
Freshwater ecosystems are increasingly threatened by complex mixtures of chemical pollutants originating from industrial, agricultural, and urban activities.
Maria V. Alvanou   +7 more
doaj   +1 more source

East European crayfish stocks at risk: arrival of non-indigenous crayfish species

open access: yesKnowledge and Management of Aquatic Ecosystems, 2016
An increasing number of non-indigenous crayfish species (NICS) of apparently pet trade origin have become established particularly in Europe. Especially alarming are recent confirmation of two distantly separated marbled crayfish Procambarus fallax f ...
Kotovska Ganna   +3 more
doaj   +1 more source

The expansion of freshwater crayfish range to the center of Eurasia

open access: yesNauplius, 2020
Freshwater crayfish were previously absent in the territory stretching from the Caspian Sea basin to the Amur basin. That gap is now being filled, mainly due to the eastward invasion of the narrow-clawed crayfish Astacus leptodactylus, which has ...
Igor Popov
doaj   +1 more source

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