Results 71 to 80 of about 152 (118)

Comparative biology of the signal crayfish, Pacifastacus leniusculus (Dana), and the narrow-clawed crayfish, Astacus leptodactylus Eschscholtz [PDF]

, 1996
Some aspects of the biology of Pacifastacus leniusculus and Astacus leptodactylus have been compared. The literature survey shows that considerably more studies have been carried out on P. leniusculus than A. leptodactylus. Although no major differences have been found in the morphology of appendages and mouthparts of the species, structural ...
openaire   +1 more source

The course of gametogenesis in narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) in the condition of water bodies of the Dnieper region

Ribogospodarsʹka Nauka Ukraïni
Purpose. Detailed study of the stages of reproductive development (oogenesis and spermatogenesis) of crayfish using the example of the narrow-clawed crayfish Astacus leptodactylus Eschscholtz, 1823 in reservoirs of the Dnieper region.
I. Borovyk, O. Marenkov
doaj   +1 more source

Physiological and Intestinal Microbiota Responses to the Feeding Stimulant Dimethyl-β-Propiothetin (DMPT) in Aquatic Animals—A Preliminary Study on Pontastacus leptodactylus Fed on a Plant-Based Diet

Antioxidants
The replacement of fishmeal with plant protein is a key strategy for sustainable aquaculture, but reduced feed intake and digestive efficiency remain major constraints.
Ying Yan, Ming Li, Yanjie Tang, Xiting Chen, Haibo Jiang, Muzi Zhang, Na Li, Bin Li   +7 more
doaj   +1 more source

Annotation full-length transcriptome of the narrow-clawed crayfish,Pontastacus leptodactylus(Eschscholtz,1832)

Annotation full-length transcriptome  of the narrow-clawed crayfish,Pontastacus leptodactylus(Eschscholtz,1832)
Chen, Yibin, Hou, Yashi, Jia, Shaoting, Gong, Kezhi, Ren, Xianyun, Xu, Wenteng, Ma, Wentao, Lv, Jianjian   +7 more
openaire   +1 more source

Standardization of pleopodal egg number in narrow-clawed crayfish ( Pontastacus leptodactylus Eschscholtz, 1823)

Invertebrate Reproduction & Development
In this study, the effects of certain biotic factors (length, presence of lesions) and abiotic factors (month of fishing and fishing area) on pleopodal egg production of Pontastacus leptodactylus (Eschscholtz, 1823) were examined to determine the optimal productivity of spawned female crayfish for aquaculture purposes.
Yıldız Bolat, Mehmet Cilbiz, Bayram Korkmaz   +2 more
openaire   +1 more source

Comparative analysis of freshwater crayfish growth in different types of water bodies in Ukraine: current trends and variability factors

Ribogospodarsʹka Nauka Ukraïni
Purpose. To conduct a comparative analysis of the growth of freshwater crayfish in different types of water bodies in Ukraine (reservoirs, bays, estuaries) and identify key factors that determine the spatiotemporal variability of their sizes and weights.
M. Burhaz, V. Gurbyk
doaj   +1 more source

Feeding Habits of Narrow-Clawed Crayfish Pontastacus leptodactylus: Implications for Stock Enhancement and Aquaculture

Animals
The narrow-clawed crayfish (Pontastacus leptodactylus), a non-native species accidentally introduced into China’s Irtysh River Basin, has formed a wild population with aquaculture potential, but its natural diet and protein utilization remain poorly ...
Ying Yan, Ming Li, Yanjie Tang, Xiting Chen, Haibo Jiang, Muzi Zhang, Na Li, Bin Li   +7 more
doaj   +1 more source

Modeling and predicting meat yield and growth performance using morphological features of narrow-clawed crayfish with machine learning techniques

Scientific Reports
In recent studies, artificial intelligence and machine learning methods give higher accuracy than other prediction methods in large data sets with complex structures.
Yasemin Gültepe, Selçuk Berber, Nejdet Gültepe   +2 more
doaj   +1 more source

An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu)

Fisheries & Aquatic Life
This study examines the monthly population parameters of Pontastacus leptodactylus in Lake Yeniçağa, including sex, length, and weight compositions, length-weight relationship, fecundity, morphometry, meat yield, and crayfish plague ratio.
Gençay İrem, Sorguç Bura Uğur, Saygı Yasemin   +2 more
doaj   +1 more source

Farming of Indigenous Crayfish in Russia: A Mini-Review of Recent Studies

Animals
Natural populations of crayfish in Europe have experienced significant declines due to the spread of crayfish plague, overfishing, competition with invasive crayfish species, and habitat degradation.
Alexander G. Dvoretsky, Vladimir G. Dvoretsky   +1 more
doaj   +1 more source