Results 21 to 30 of about 28,506 (176)

Hungary: a European hotspot of non-native crayfish biodiversity

Knowledge and Management of Aquatic Ecosystems, 2020
There is a long history of crayfish introductions in Europe and numbers keep increasing. In Hungary, spiny-cheek crayfish Faxonius limosus, signal crayfish Pacifastacus leniusculus, red swamp crayfish Procambarus clarkii, marbled crayfish P.
Weiperth András, Bláha Martin, Szajbert Bettina, Seprős Richárd, Bányai Zsombor, Patoka Jiří, Kouba Antonín   +6 more
doaj   +1 more source

Aquatic Invasions! A Menace to the West : Crayfish Species Guide

Crayfish are one of the most threatened groups of animals in the world. About 45 percent of North American crayfish species are considered to be at risk of extinction.
Siemens, Tania
core   +6 more sources

Euastacus fetzneri sp. nov., a new highly range restricted dwarf spiny freshwater crayfish (Crustacea: Decapoda: Parastacidae) from the upper Nerang River, Southeast Queensland, Australia, with a conservation assessment and recommendations.

Records of the Australian Museum
The Australian freshwater spiny crayfish genus Euastacus Clark, 1936 is the most speciose genus of the family Parastacidae, with 56 species currently described. A new species of dwarf spiny crayfish, Euastacus fetzneri sp.
Robert B. McCormack, Shane T. Ahyong
doaj   +1 more source

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

, 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., McCaughan, Helen M. C., Brendan J. Hicks, Helen M. C. McCaughan   +3 more
core   +1 more source

Non-consumptive effects of native, alien and invasive alien crayfish on damselfly egg life history and carry-over effects on larval physiology [PDF]

NeoBiota
Invasive alien (IA) predators pose significant threats to native ecosystems, often leading to profound impacts on prey species through both direct and non-consumptive effects (NCE). This study focused on the NCE of predator-induced stress from one native
Szymon Sniegula, Dorota Konczarek, Maciej Bonk, Andrzej Antoł, Nermeen R. Amer, Robby Stoks   +5 more
doaj   +3 more sources

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

, 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., Sean Taylor, Taylor, Sean, Michael J. Landman, Ling, Nicholas, Nicholas Ling   +5 more
core   +1 more source

Controlled Infection Experiment With Aphanomyces astaci Provides Additional Evidence for Latent Infections and Resistance in Freshwater Crayfish

Frontiers in Ecology and Evolution, 2021
For 150 years the crayfish plague disease agent Aphanomyces astaci has been the cause of mass mortalities among native European crayfish populations. However, recently several studies have highlighted the great variability of A.
Caterina Francesconi, Jenny Makkonen, Anne Schrimpf, Japo Jussila, Harri Kokko, Kathrin Theissinger, Kathrin Theissinger   +6 more
doaj   +1 more source

Exponential increase of signal crayfish in running waters in Sweden – due to illegal introductions?

Knowledge and Management of Aquatic Ecosystems, 2011
Sweden has only one indigenous species of crayfish, the noble crayfish (Astacus astacus, Fabricius). There has been a steady decline of noble crayfish populations in Sweden since 1907, mainly due to the crayfish plague.
Bohman P., Degerman E., Edsman L., Sers B.   +3 more
doaj   +1 more source

Grading crayfish by estimating the proportion of crayfish head and pincers based on DeepLab V3+

Shipin yu jixie
Objective: To achieve reasonable and effective grading of live crayfish, and improve the work of grading crayfish. Methods: The construction of crayfish image shooting platform, to obtain the original image of crayfish, and the semantic segmentation ...
WANG Zihao, HU Zhigang, FU Dandan, JIANG Yajun   +3 more
doaj   +1 more source

Comparative Analysis on Muscle Quality of Procambarus clarkii Under Different Aquaculture Models in Hubei Province

Shipin gongye ke-ji, 2023
In order to evaluate the quality characteristics of red swamp crayfish (Procambarus clarkii) cultured under different aquaculture modes, the crayfish selected under integrated rice-crayfish culture, pond culture, lotus-crayfish culture and wild mode in ...
Dan ZHENG, Xitian PENG, Xian ZHANG, Juanxian ZHANG, Youxiang ZHOU, Lijun PENG, Zhenzhen XIA   +6 more
doaj   +1 more source