Results 81 to 90 of about 2,542 (212)

Sviluppo di un bioindicatore naturale per il monitoraggio della qualità delle acque [PDF]

open access: yes, 2013
2011/2012La concentrazione del glucosio emolinfatico è regolata nei Crostacei dal crustacean Hyperglycemic Hormone (cHH), un neuropeptide prodotto e rilasciato in circolo nel complesso organo X-ghiandola del seno, localizzato nei peduncoli oculari.
Mosco, Alessandro
core   +1 more source

Harmful impact of filamentous algae (Spirogyra sp.) on juvenile crayfish

open access: yesArchives of Polish Fisheries, 2015
The aim of this study was to determine the impact of filamentous algae on the growth and survival of juvenile narrow-clawed crayfish, Astacus leptodactylus (Esch.), in rearing basins.
Ulikowski Dariusz   +2 more
doaj   +1 more source

Commensal bacteria from crayfish cuticle and their potential significance in biocontrol of causative agent of crayfish plague [PDF]

open access: yes, 2018
Patogeni iz razreda Oomycetes sve su veća prijetnja za biljne i životinjske vrste. Među njima je patogen Aphanomyces astaci (Schikora, 1906), uzročnik bolesti račje kuge, koji je uvršten na popis 100 najopasnijih invazivnih vrsta svijeta.
Orlić, Karla
core   +2 more sources

Appropriate Usage Level of Shrimp Waste Meal as Chitin Source for Feeding Young Crayfish (Astacus leptodactylus Esch. 1823) [PDF]

open access: yes, 2011
This study was conducted to determine effects of shrimp waste meal as natural chitin source at different rates (0 (control), 10, 20, 30 and 40% ) on growth, feed conversion ratio (FCR), survival of young crayfish (1.61±0.04 g and 3.74±0.03 cm) for 60 ...
Seval Bahadır Koca*, Nalan Ozgur Yigit, Arife Dulluc, Gonca Erol1, Nihal Cılbız1 and Ramazan Kucukkara1
core  

Freshwater crayfish distribution update and maps for Greece: combining literature and citizen-science data

open access: yesKnowledge and Management of Aquatic Ecosystems, 2017
Crayfish are charismatic creatures of high interest to humans, among others playing key roles in freshwater ecosystems. Considering the significance of indigenous crayfish species (ICS) as well as the risks posed by non-indigenous crayfish species (NICS)
Perdikaris Costas   +3 more
doaj   +1 more source

Causative agent of the crayfish plague: Aphanomyces astaci Schikora, 1906 [PDF]

open access: yes, 2018
Riječni rakovi važan su element slatkovodnih ekosustava. U posljednjih 200 godina došlo je do drastičnog smanjenja brojnosti autohtonih vrsta riječnih rakova na području Europe.
Petrović, Ana
core  

Movement patterns and shelter choice of spiny-cheek crayfish (Orconectes limosus) in a large lake’s littoral zone [PDF]

open access: yes, 2016
he study of individual movement patterns and habitat choice is a fundamental step to assess an invasive species’ range extension and to inform possible management options.
Burkhardt-Holm, Patricia   +3 more
core   +2 more sources

Distribution and dispersal of two invasive crayfish species in the Drava River basin, Croatia [PDF]

open access: yesKnowledge and Management of Aquatic Ecosystems, 2009
The aim of this work is to explore the current distribution and dispersal rates of two nonindigenous crayfish species (NICS) recorded in Croatia: the signal crayfish (Pacifastacus leniusculus) and spiny-cheek crayfish(Orconectes limosus).
S. Hudina   +4 more
doaj  

Effects of zinc oxide nanoparticles and zinc ions on intestine histopathology of freshwater crayfish (Astacus leptodactylus) [PDF]

open access: yesبوم‌شناسی آبزیان, 2016
The purpose of this study was to evaluate the effects of zinc oxide nanoparticles and ions on intestinal tissue histopathology of freshwater crayfish (Astacus leptodactylus) under laboratory conditions.
Borhan Mansouri   +3 more
doaj  

Update on the distribution of freshwater crayfish in Croatia

open access: yesKnowledge and Management of Aquatic Ecosystems, 2011
Four indigenous European and two non-indigenous American freshwater crayfish species inhabit Croatian freshwater habitats. Generally, the noble crayfish (Astacus astacus), the narrow-clawed crayfish (Astacus leptodactylus) and the stone crayfish ...
Maguire I., Jelić M., Klobučar G.
doaj   +1 more source

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