Results 41 to 50 of about 225 (145)
Aquaculture Reports, 2019 Understanding the annual dynamic of gametes in crayfish is useful for successful management of crayfish population. The annual variations in spermatozoa content of vas deferens, gonado-somatic index (GSI), hepatosomatic index (HSI), vas deferens index ...
Ardavan Farhadi +1 more
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Fecundity of the narrow-clawed crayfish Pontastacus leptodactylus in the water bodies of Belarus
Proceedings of the National Academy of Sciences of Belarus, Biological Series, 2023 Pre-larvae hatching fecundity and ovarian fecundity of narrow-clawed crayfish populations were estimated in the lakes and reservoirs of Belarus. Statistically significant differences in the fecundity of females from various water bodies were noted only for Lake Kichino.
openaire +1 more source
Knowledge and Management of Aquatic Ecosystems, 2006 The taxonomic classification of European crayfish is neither fully examined nor generally accepted as a unifying scheme. At present, one of the most obvious differences exists between astacologists from Western and Eastern Europe.
ŚMIETANA P. +3 more
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Vestnik Zoologii, 2013 The existence on the territory of Ukraine of two sympatric widespread species definitely different by their chromosome number was proved based on the meiotic chromosome preparations. Besides the nominal species Pontastacus leptodactylus (Dana, 1852) with modal haploid chromosome number n = 93 we prove the existence of P. angulosus (Rathke, 1837) with n
Kostyuk, V.S. +2 more
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Acta Natura et Scientia, 2020 A female albino crayfish Pontastacus leptodactylus (Eschscholtz, 1823) was captured from Atikhisar Reservoir in Çanakkale, Turkey on July 18, 2020. The albino crayfish is lacked melanin that is normally found on normal crayfish.
Semih Kale +7 more
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Effects of Substituting Fish Meal by Chlorella Meal in Practical Diet on Growth, Feed Utilization, and Flesh Quality of Pacific White Shrimp (Penaeus vannamei). [PDF]
Aquac NutrThis study investigated the effects of substituting fish meal (FM) in practical diet by chlorella meal on the growth, feed utilization, and flesh quality of Pacific white shrimp (Penaeus vannamei). First, a basal diet was prepared with 200 g/kg FM inclusion (FM‐20), and then chlorella meal was used to reduce FM inclusion to 150 g/kg (FM‐15), 100 g/kg ...
Li M, Li X, Yao W, Wang Y, Li L, Leng X.
europepmc +2 more sources
The food of Branchiobdella Odier, 1823 (Annelida) dwelling on crayfish and the occurrence of the fish parasite Argulus Müller, 1785 (Crustacea) on the carapace of Pontastacus leptodactylus (Esch.) [PDF]
Acta Ichthyologica et Piscatoria, 1999 Gut content of Branchiobdella spp. was examined in 83-945 individuals belonging to 4 species, collected from 31 individuals of Astacus astacus (L.) and 12 individuals of Pontastacus leptodactylus (Esch.) from north-western and southern Poland.
J. Wierzbicka, P. Śmietana
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Limnologica, 2019 Abstract Freshwater decapods rarely co-occur. The crab Potamon potamios and the narrow-clawed crayfish Pontastacus leptodactylus complex usually do not share the same pond even if they live in sympatry. An exception, however, is Lake Egirdir (Turkey), where both species are present. The aim of our study was to analyze the distribution patterns of the
Oğuz Yaşar Uzunmehmetoğlu +5 more
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Acta Natura et Scientia, 2022 The crayfish population dramatically declined in most lakes and dams in Türkiye; hence, crayfish culture is a possible option to increase the supply. This study aimed to determine the effects of stocking density on the growth performance and survival ...
Yavuz Mazlum, Cumhur Uzun
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Molecular Characterisation of Endangered White‐Clawed Crayfish Populations in Southern Switzerland
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 3, March 2026.ABSTRACT This study investigates the phylogeography of the endangered European White‐Clawed Crayfish (WCC) Austropotamobius pallipes species complex in the main tributaries of the Po River basin in southern Switzerland and northern Italy, a diversity hotspot for this species.
Sebastian Prati +3 more
wiley +1 more source