Results 41 to 50 of about 206 (149)

Türkiye’nin Kerevit Pontastacus leptodactylus (Eschscholtz, 1823) Üretiminin Ulusal ve Küresel Ölçekte Değerlendirilmesi

Journal of Limnology and Freshwater Fisheries Research, 2020
Bu çalışmada, Dünya’daki kerevit üretim miktarlarının yıllar içerisindeki değişimi ve Türkiye’de gerçekleşen üretimin küresel ölçekteki payı değerlendirilmiş olup, üretim kapasitesinin arttırılmasına yönelik bazı tavsiyelerde bulunulmuştur. 2016 yılı Birleşmiş Milletler Gıda ve Tarım Örgütü (FAO) verilerine göre Dünya’da avcılığa dayalı kerevit üretimi
Mehmet CİLBİZ, Celalettin AYDIN, Oğuz Yaşar UZUNMEHMETOĞLU   +2 more
openaire   +3 more sources

A PROPOSAL FOR ACCEPTING PONTASTACUS AS A GENUS OF EUROPEAN CRAYFISH WITHIN THE FAMILY ASTACIDAE BASED ON A REVISION OF THE WEST AND EAST EUROPEAN TAXONOMIC LITERATURE

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., SCHULZ H. K., KESZKA S., SCHULZ R.   +3 more
doaj   +1 more source

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 Nutr
This 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

Some features of crustacean cultivation aquabiotechnology on the waters of energy facilities [PDF]

E3S Web of Conferences, 2021
The data on the state of the crayfish population on the territory of the Middle Volga before its regulation and after the formation of reservoirs are presented.
Kalaida Marina, Khamitova Madina, Borisova Svetlana   +2 more
doaj   +1 more source

Keban Baraj Gölü Kerevit Pontastacus leptodactylus (Eschscholtz, 1823)’un Avcılık Veriminin Araştırılması

DÜSTAD Dünya Sağlık ve Tabiat Bilimleri Dergisi, 2023
Bu çalışma, Keban Baraj Gölü'nde 1 Temmuz- 1 Kasım 2023 yılı kerevit av sezonunda gerçekleştirilen kerevit avcılığının av veriminin tespit edilmesi amacıyla yapılmıştır. Çalışma, kerevit avcılığı yapan 45 adet balıkçıya yüz yüze anket uygulanarak ve kooperatif kayıtlarından avcılık verileri alınarak gerçekleştirilmiştir. Keban Baraj Gölü'nde; Kemaliye,
openaire   +2 more sources

Karyotypes and Morphological Variability of Crayfish Pontastacus Leptodactylus and P. Angulosus (Malacostraca, Decapoda)

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., Garbar, A.V., Mezhzherin, S.V.   +2 more
openaire   +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
doaj   +3 more sources

Growth performance and RNA/DNA ratio of noble crayfish (Astacus astacus) and narrow‐clawed crayfish (Pontastacus leptodactylus) fed fish waste diets

Aquaculture Research, Volume 51, Issue 8, Page 3205-3215, August 2020., 2020
Abstract New and viable species for aquaponics and integrated multi‐trophic aquaculture (IMTA) in freshwater systems can improve yields and sustainability of aquaculture. Freshwater crayfish species such as Astacus astacus and Pontastacus leptodactylus are omnivorous feeders and considered candidates for feeding on faecal matters in existing ...
Tanja Yvonne Roessler, Andrea Wirtz, Matthew James Slater, Joachim Henjes   +3 more
wiley   +1 more source

Impact of Stocking Density on the Survival, Growth and Injury of Narrow Narrow-Clawed Crayfish ( Pontastacus leptodactylus ) Reared in a Flowing Brackish Water System

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
doaj   +1 more source

Populations of long-clawed crayfish Pontastacus leptodactylus: Effect of commercial fishing on the size and age structure

Vestnik MGTU, 2023
Fishing affects the population of crayfish, while it changes the size and age characteristics. The size and age parameters of two populations of the narrow-clawed crayfish Pontastacus leptodactylus in the Loktyshi (Brest Region) and Krasnoslobodskoe ...
Alekhnovich A. V.
doaj   +1 more source