You are here
Home » Charadriiformes » ΒΙΒΛΙΟΓΡΑΦΙΑ - LITERATURE
ΒΙΒΛΙΟΓΡΑΦΙΑ - LITERATURE
Export selection as
Taxonomic name
- (-) Remove Charadriiformes filter Charadriiformes
- Accipitridae (3) Apply Accipitridae filter
- Accipitriformes (3) Apply Accipitriformes filter
- Acrocephalidae (1) Apply Acrocephalidae filter
- Acrocephalus (1) Apply Acrocephalus filter
- Acrocephalus arundinaceus (1) Apply Acrocephalus arundinaceus filter
- Aegypius (1) Apply Aegypius filter
- Aegypius monachus (1) Apply Aegypius monachus filter
- Alaudidae (2) Apply Alaudidae filter
- Anas (1) Apply Anas filter
- Anas crecca (1) Apply Anas crecca filter
- Anatidae (4) Apply Anatidae filter
- Anatinae (4) Apply Anatinae filter
- Animalia (17) Apply Animalia filter
- Anseriformes (4) Apply Anseriformes filter
- Anserinae (1) Apply Anserinae filter
- Aquila (1) Apply Aquila filter
- Ardea (1) Apply Ardea filter
- Ardea cinerea (1) Apply Ardea cinerea filter
- Ardeidae (2) Apply Ardeidae filter
- Ardeinae (1) Apply Ardeinae filter
- Aves (17) Apply Aves filter
- Aythya (3) Apply Aythya filter
- Aythya ferina (1) Apply Aythya ferina filter
- Aythya fuligula (1) Apply Aythya fuligula filter
- Aythya nyroca (2) Apply Aythya nyroca filter
- Bilateria (17) Apply Bilateria filter
- Botaurinae (2) Apply Botaurinae filter
- Branta (1) Apply Branta filter
- Branta ruficollis (1) Apply Branta ruficollis filter
- Buteo (1) Apply Buteo filter
- Buteo buteo (1) Apply Buteo buteo filter
- Calonectris (1) Apply Calonectris filter
- Calonectris diomedea (1) Apply Calonectris diomedea filter
- Caretta (1) Apply Caretta filter
- Caretta caretta (1) Apply Caretta caretta filter
- Carettinae (1) Apply Carettinae filter
- Charadriidae (2) Apply Charadriidae filter
- Charadrius (1) Apply Charadrius filter
- Cheloniidae (1) Apply Cheloniidae filter
- Chelonioidea (1) Apply Chelonioidea filter
- Chordata (17) Apply Chordata filter
- Chroicocephalus (3) Apply Chroicocephalus filter
- Chroicocephalus genei (1) Apply Chroicocephalus genei filter
- Chroicocephalus ridibundus (2) Apply Chroicocephalus ridibundus filter
- Circus (2) Apply Circus filter
- Circus aeruginosus (1) Apply Circus aeruginosus filter
- Circus cyaneus (1) Apply Circus cyaneus filter
- Columbidae (1) Apply Columbidae filter
- Columbiformes (1) Apply Columbiformes filter
- Columbinae (1) Apply Columbinae filter
- Cryptodira (1) Apply Cryptodira filter
- Falco (3) Apply Falco filter
- Falco tinnunculus (2) Apply Falco tinnunculus filter
- Falconidae (3) Apply Falconidae filter
- Falconiformes (3) Apply Falconiformes filter
- Falconinae (3) Apply Falconinae filter
- Fulica (1) Apply Fulica filter
- Fulica atra (1) Apply Fulica atra filter
- Galerida (2) Apply Galerida filter
- Galerida cristata (2) Apply Galerida cristata filter
- Galliformes (1) Apply Galliformes filter
- Gallinula (1) Apply Gallinula filter
- Gallinula chloropus (1) Apply Gallinula chloropus filter
- Gelochelidon (1) Apply Gelochelidon filter
- Gelochelidon nilotica (1) Apply Gelochelidon nilotica filter
- Glareola (2) Apply Glareola filter
- Glareola pratincola (2) Apply Glareola pratincola filter
- Glareolidae (2) Apply Glareolidae filter
- Gruiformes (2) Apply Gruiformes filter
- Gypaetus (1) Apply Gypaetus filter
- Gypaetus barbatus (1) Apply Gypaetus barbatus filter
- Himantopus (3) Apply Himantopus filter
- Himantopus himantopus (3) Apply Himantopus himantopus filter
- Hirundinidae (1) Apply Hirundinidae filter
- Hirundo (1) Apply Hirundo filter
- Hirundo rustica (1) Apply Hirundo rustica filter
- Ichthyaetus (5) Apply Ichthyaetus filter
- Ichthyaetus audouinii (4) Apply Ichthyaetus audouinii filter
- Ichthyaetus melanocephalus (1) Apply Ichthyaetus melanocephalus filter
- Iduna (1) Apply Iduna filter
- Iduna pallida (1) Apply Iduna pallida filter
- Ixobrychus (1) Apply Ixobrychus filter
- Ixobrychus minutus (1) Apply Ixobrychus minutus filter
- Laridae (12) Apply Laridae filter
- Larus (6) Apply Larus filter
- Larus argentatus (1) Apply Larus argentatus filter
- Larus argentatus argentatus (1) Apply Larus argentatus argentatus filter
- Larus armenicus (1) Apply Larus armenicus filter
- Larus cachinnans (1) Apply Larus cachinnans filter
- Larus cachinnans cachinnans (1) Apply Larus cachinnans cachinnans filter
- Larus fuscus (1) Apply Larus fuscus filter
- Larus glaucoides (1) Apply Larus glaucoides filter
- Larus glaucoides glaucoides (1) Apply Larus glaucoides glaucoides filter
- Larus marinus (1) Apply Larus marinus filter
- Larus michahellis (4) Apply Larus michahellis filter
- Larus michahellis michahellis (1) Apply Larus michahellis michahellis filter
- Microcarbo (1) Apply Microcarbo filter
- Microcarbo pygmaeus (1) Apply Microcarbo pygmaeus filter
- Motacilla (1) Apply Motacilla filter
- Motacilla flava (1) Apply Motacilla flava filter
- Motacillidae (1) Apply Motacillidae filter
- Passeriformes (3) Apply Passeriformes filter
- Pelecanidae (1) Apply Pelecanidae filter
- Pelecaniformes (3) Apply Pelecaniformes filter
- Pelecanus (1) Apply Pelecanus filter
- Pelecanus crispus (1) Apply Pelecanus crispus filter
- Perdicinae (1) Apply Perdicinae filter
- Perdix (1) Apply Perdix filter
- Perdix perdix (1) Apply Perdix perdix filter
- Phalacrocoracidae (3) Apply Phalacrocoracidae filter
- Phalacrocorax (2) Apply Phalacrocorax filter
- Phalacrocorax aristotelis (1) Apply Phalacrocorax aristotelis filter
- Phalacrocorax aristotelis desmarestii (1) Apply Phalacrocorax aristotelis desmarestii filter
- Phasianidae (1) Apply Phasianidae filter
- Platalea (1) Apply Platalea filter
- Platalea leucorodia (1) Apply Platalea leucorodia filter
- Plataleinae (1) Apply Plataleinae filter
- Plegadis (1) Apply Plegadis filter
- Plegadis falcinellus (1) Apply Plegadis falcinellus filter
- Pluvialis (1) Apply Pluvialis filter
- Pluvialis squatarola (1) Apply Pluvialis squatarola filter
- Podiceps (1) Apply Podiceps filter
- Podiceps cristatus (1) Apply Podiceps cristatus filter
- Podiceps nigricollis (1) Apply Podiceps nigricollis filter
- Podicipedidae (1) Apply Podicipedidae filter
- Podicipediformes (1) Apply Podicipediformes filter
- Procellariidae (1) Apply Procellariidae filter
- Procellariiformes (1) Apply Procellariiformes filter
- Puffinus (1) Apply Puffinus filter
- Puffinus yelkouan (1) Apply Puffinus yelkouan filter
- Rallidae (2) Apply Rallidae filter
- Recurvirostridae (3) Apply Recurvirostridae filter
- Reptilia (1) Apply Reptilia filter
- Riparia (1) Apply Riparia filter
- Riparia riparia (1) Apply Riparia riparia filter
- Scolopacidae (2) Apply Scolopacidae filter
- Scolopax (1) Apply Scolopax filter
- Scolopax rusticola (1) Apply Scolopax rusticola filter
- Sternula (1) Apply Sternula filter
- Sternula albifrons (1) Apply Sternula albifrons filter
- Streptopelia (1) Apply Streptopelia filter
- Streptopelia turtur (1) Apply Streptopelia turtur filter
- Suliformes (3) Apply Suliformes filter
- Testudines (1) Apply Testudines filter
- Tetrapoda (17) Apply Tetrapoda filter
- Thalasseus (1) Apply Thalasseus filter
- Thalasseus sandvicensis (1) Apply Thalasseus sandvicensis filter
- Threskiornithidae (1) Apply Threskiornithidae filter
- Threskiornithinae (1) Apply Threskiornithinae filter
- Tringa (1) Apply Tringa filter
- Tringa glareola (1) Apply Tringa glareola filter
- Vanellus (2) Apply Vanellus filter
- Vanellus spinosus (1) Apply Vanellus spinosus filter
- Vanellus vanellus (1) Apply Vanellus vanellus filter
- Vertebrata (17) Apply Vertebrata filter
Author
- Akriotis, T (1) Apply Akriotis, T filter
- Alivizatos, H (1) Apply Alivizatos, H filter
- Alvanou, L (1) Apply Alvanou, L filter
- Athanasiadis, A (1) Apply Athanasiadis, A filter
- Birtsas, P (1) Apply Birtsas, P filter
- Catsadorakis, G (1) Apply Catsadorakis, G filter
- Dendrinos, P (1) Apply Dendrinos, P filter
- Dimalexis, T (2) Apply Dimalexis, T filter
- Evangelidis, A (1) Apply Evangelidis, A filter
- Fric, J (2) Apply Fric, J filter
- Gaganis, K (1) Apply Gaganis, K filter
- Goutner, V (1) Apply Goutner, V filter
- Halley, J (1) Apply Halley, J filter
- Kardakari, N (1) Apply Kardakari, N filter
- Karris, G (1) Apply Karris, G filter
- Kasapidis, P (1) Apply Kasapidis, P filter
- Kastritis, T (2) Apply Kastritis, T filter
- Katrana, E (1) Apply Katrana, E filter
- Katselidis, K (1) Apply Katselidis, K filter
- Kazantzidis, S (2) Apply Kazantzidis, S filter
- Kazantzidis, S (1) Apply Kazantzidis, S filter
- Kazoglou, Y (1) Apply Kazoglou, Y filter
- Kominos, T (1) Apply Kominos, T filter
- Koutseri, I (1) Apply Koutseri, I filter
- Krause, Α (1) Apply Krause, Α filter
- Latsoudis, P (1) Apply Latsoudis, P filter
- Logotheti, A (1) Apply Logotheti, A filter
- Makrigianni, E (1) Apply Makrigianni, E filter
- Malakou, M (1) Apply Malakou, M filter
- Manolopoulos, A (1) Apply Manolopoulos, A filter
- Mullin, VS. (2) Apply Mullin, VS. filter
- Nikolaou, H (1) Apply Nikolaou, H filter
- Nikolaou, L (1) Apply Nikolaou, L filter
- Panagiotopoulou, M (1) Apply Panagiotopoulou, M filter
- Papaconstantinou, C (1) Apply Papaconstantinou, C filter
- Papandropoulos, D (1) Apply Papandropoulos, D filter
- Peristeraki, P (1) Apply Peristeraki, P filter
- Poirazidis, K (1) Apply Poirazidis, K filter
- Portolou, D (1) Apply Portolou, D filter
- Portolou, D (1) Apply Portolou, D filter
- Rigas, Y (1) Apply Rigas, Y filter
- Schofield, G (1) Apply Schofield, G filter
- Sgardelis, S (1) Apply Sgardelis, S filter
- Shumka, S (1) Apply Shumka, S filter
- Sokos, C (1) Apply Sokos, C filter
- Tsiakiris, R (1) Apply Tsiakiris, R filter
- Valaoras, G (1) Apply Valaoras, G filter
- Velevski, M (1) Apply Velevski, M filter
- Yfantis, G (1) Apply Yfantis, G filter
- Zografou, C (1) Apply Zografou, C filter
- Δημάκη, Μ (1) Apply Δημάκη, Μ filter
- Δρετάκης, Μ (1) Apply Δρετάκης, Μ filter
- Ζακκάκ, Σ (1) Apply Ζακκάκ, Σ filter
- Μπίρτσας, Π (1) Apply Μπίρτσας, Π filter
- Παναγιωτοπούλου, Μ (1) Apply Παναγιωτοπούλου, Μ filter
- Παπακωνσταντίνου, Κ (1) Apply Παπακωνσταντίνου, Κ filter
- Παπασπυρόπουλος, Κ (1) Apply Παπασπυρόπουλος, Κ filter
- ΣΩΚΟΣ, Χ (1) Apply ΣΩΚΟΣ, Χ filter
- ΧΑΣΑΝΑΓΑΣ, ΝΔ. (1) Apply ΧΑΣΑΝΑΓΑΣ, ΝΔ. filter
Publication type
Journal keyword
- <i>aristotelis</i> (1) Apply <i>aristotelis</i> filter
- <i>audouinii</i> (2) Apply <i>audouinii</i> filter
- <i>desmarestii</i> (1) Apply <i>desmarestii</i> filter
- <i>Himantopus himantopus</i> (1) Apply <i>Himantopus himantopus</i> filter
- <i>Hoplopterus spinosus</i> (1) Apply <i>Hoplopterus spinosus</i> filter
- <i>Hoplopterus</i> (1) Apply <i>Hoplopterus</i> filter
- <i>Ichthyaetus audouinii</i> (2) Apply <i>Ichthyaetus audouinii</i> filter
- <i>Ichthyaetus</i> (2) Apply <i>Ichthyaetus</i> filter
- <i>Larus audouinii</i> (2) Apply <i>Larus audouinii</i> filter
- <i>Larus</i> (1) Apply <i>Larus</i> filter
- <i>Phalacrocorax aristotelis desmarestii</i> (1) Apply <i>Phalacrocorax aristotelis desmarestii</i> filter
- <i>Phalacrocorax</i> (1) Apply <i>Phalacrocorax</i> filter
- <i>spinosus</i> (1) Apply <i>spinosus</i> filter
- <i>Vanellus spinosus</i> (1) Apply <i>Vanellus spinosus</i> filter
- abundance (1) Apply abundance filter
- Aegean (2) Apply Aegean filter
- aeruginosus (1) Apply aeruginosus filter
- agriculture (1) Apply agriculture filter
- Aliakmon (1) Apply Aliakmon filter
- argentatus (1) Apply argentatus filter
- armenicus (1) Apply armenicus filter
- Audouin's Gull (2) Apply Audouin's Gull filter
- audouini (1) Apply audouini filter
- audouinii (1) Apply audouinii filter
- Aves (4) Apply Aves filter
- avifauna (1) Apply avifauna filter
- Axios-Loudias-Aliakmonas (1) Apply Axios-Loudias-Aliakmonas filter
- behaviour (1) Apply behaviour filter
- Belarus (1) Apply Belarus filter
- bird (3) Apply bird filter
- birds (5) Apply birds filter
- birds of prey (1) Apply birds of prey filter
- black-winged stilt (1) Apply black-winged stilt filter
- breeding (3) Apply breeding filter
- cachinnans (1) Apply cachinnans filter
- Caretta caretta (1) Apply Caretta caretta filter
- cereal (1) Apply cereal filter
- characteristics (1) Apply characteristics filter
- Circus (1) Apply Circus filter
- Circus aeruginosus (1) Apply Circus aeruginosus filter
- colony (1) Apply colony filter
- comparison (1) Apply comparison filter
- conservation (3) Apply conservation filter
- CROATIA (1) Apply CROATIA filter
- cultivation (1) Apply cultivation filter
- delta (1) Apply delta filter
- diet (1) Apply diet filter
- distribution (2) Apply distribution filter
- disturbance (1) Apply disturbance filter
- evaluation (1) Apply evaluation filter
- Evros (2) Apply Evros filter
- foraging (1) Apply foraging filter
- fuscus (1) Apply fuscus filter
- glaucoides (1) Apply glaucoides filter
- Greece (2) Apply Greece filter
- gulls (1) Apply gulls filter
- harrier (1) Apply harrier filter
- heronries (1) Apply heronries filter
- heuglini (1) Apply heuglini filter
- human (1) Apply human filter
- Hungary (1) Apply Hungary filter
- hunters (1) Apply hunters filter
- IBAs (1) Apply IBAs filter
- Ichthyaetus (1) Apply Ichthyaetus filter
- impact (1) Apply impact filter
- implementation (1) Apply implementation filter
- Important bird areas (1) Apply Important bird areas filter
- intermedius (1) Apply intermedius filter
- interventions (1) Apply interventions filter
- Kotychi (1) Apply Kotychi filter
- lakes (1) Apply lakes filter
- Larus (2) Apply Larus filter
- Larus audouinii (1) Apply Larus audouinii filter
- Life-Natura (1) Apply Life-Natura filter
- Life-Φύση (1) Apply Life-Φύση filter
- marinus (1) Apply marinus filter
- marsh (2) Apply marsh filter
- marshes (1) Apply marshes filter
- mediterranean shag (1) Apply mediterranean shag filter
- michahellis (1) Apply michahellis filter
- migratory (1) Apply migratory filter
- Milos (1) Apply Milos filter
- monitoring (1) Apply monitoring filter
- nesting (2) Apply nesting filter
- place (1) Apply place filter
- Plover (1) Apply Plover filter
- population (1) Apply population filter
- predation (1) Apply predation filter
- Prespa (1) Apply Prespa filter
- prey (1) Apply prey filter
- projects (1) Apply projects filter
- questionnaires (1) Apply questionnaires filter
- RAMSAR (1) Apply RAMSAR filter
- raptor (1) Apply raptor filter
- salt (1) Apply salt filter
- seabirds (1) Apply seabirds filter
- selection (1) Apply selection filter
- shag (1) Apply shag filter
- Spur-Winged Plover (1) Apply Spur-Winged Plover filter
- status (1) Apply status filter
- Strofylia (1) Apply Strofylia filter
- terns (1) Apply terns filter
- Thessaloniki (1) Apply Thessaloniki filter
- threatened species (1) Apply threatened species filter
- turtle (1) Apply turtle filter
- waterbirds (1) Apply waterbirds filter
- wetland complex (1) Apply wetland complex filter
- wetlands (1) Apply wetlands filter
- wintering site (1) Apply wintering site filter
- woodcock (1) Apply woodcock filter
- yellow-legged gull (1) Apply yellow-legged gull filter
- Zakynthos (1) Apply Zakynthos filter
- Άξιος-Λουδίας-Αλιάκμονας (1) Apply Άξιος-Λουδίας-Αλιάκμονας filter
- Έβρος (2) Apply Έβρος filter
- Αιγαίο (2) Apply Αιγαίο filter
- Αλιάκμονας (1) Apply Αλιάκμονας filter
- Ελλάδα (1) Apply Ελλάδα filter
- Ζάκυνθος (1) Apply Ζάκυνθος filter
- Θαλασσοκόρακας (1) Apply Θαλασσοκόρακας filter
- Θεσσαλονίκη (1) Apply Θεσσαλονίκη filter
- Ιμαντόπους (1) Apply Ιμαντόπους filter
- Καλαμοκανάς (1) Apply Καλαμοκανάς filter
- Κροατία (1) Apply Κροατία filter
- Λευκορωσία (1) Apply Λευκορωσία filter
- Μήλος (1) Apply Μήλος filter
- Ορνιθοπανίδα (1) Apply Ορνιθοπανίδα filter
- Ουγγαρία (1) Apply Ουγγαρία filter
- Πρέσπα (1) Apply Πρέσπα filter
- Στερνίδες (1) Apply Στερνίδες filter
- Στροφυλιά (1) Apply Στροφυλιά filter
- αιγαιόγλαρος (3) Apply αιγαιόγλαρος filter
- αλμυροβάλτος (1) Apply αλμυροβάλτος filter
- αναπαραγωγή (3) Apply αναπαραγωγή filter
- ανθρώπινος (1) Apply ανθρώπινος filter
- αξιολόγηση (1) Apply αξιολόγηση filter
- απειλούμενα είδη (1) Apply απειλούμενα είδη filter
- αποικία (1) Apply αποικία filter
- αρπακτικά (1) Apply αρπακτικά filter
- αρπακτικό (1) Apply αρπακτικό filter
- ασημόγλαρος (1) Apply ασημόγλαρος filter
- αφθονία (1) Apply αφθονία filter
- βάλτος (1) Apply βάλτος filter
- γεωργία (1) Apply γεωργία filter
- γλάροι (1) Apply γλάροι filter
- γλάρος (4) Apply γλάρος filter
- δέλτα (1) Apply δέλτα filter
- διατήρηση (2) Apply διατήρηση filter
- διατροφή (1) Apply διατροφή filter
- επίδραση (1) Apply επίδραση filter
- επιλογή (1) Apply επιλογή filter
- ερωτηματολόγια (1) Apply ερωτηματολόγια filter
- θήραμα (1) Apply θήραμα filter
- θαλασσοπούλια (1) Apply θαλασσοπούλια filter
- καλλιέργεια (1) Apply καλλιέργεια filter
- κατάσταση (1) Apply κατάσταση filter
- κατανομή (2) Apply κατανομή filter
- κοτύχια (1) Apply κοτύχια filter
- κυνηγών (1) Apply κυνηγών filter
- λίμνες (1) Apply λίμνες filter
- μελανόγλαρος (1) Apply μελανόγλαρος filter
- μεσογειακό (1) Apply μεσογειακό filter
- μεταναστευτικά (1) Apply μεταναστευτικά filter
- μπεκάτσας (1) Apply μπεκάτσας filter
- νεροπούλια (1) Apply νεροπούλια filter
- παρακολούθηση (1) Apply παρακολούθηση filter
- παρεμβάσεις (1) Apply παρεμβάσεις filter
- πληθυσμός (1) Apply πληθυσμός filter
- πουλί (3) Apply πουλί filter
- πουλιά (4) Apply πουλιά filter
- πρότζεκτ (1) Apply πρότζεκτ filter
- πτηνά (2) Apply πτηνά filter
- σιτηρά (1) Apply σιτηρά filter
- στρουθιόμορφα (1) Apply στρουθιόμορφα filter
- συμπεριφορά (1) Apply συμπεριφορά filter
- σύγκριση (1) Apply σύγκριση filter
- τροφή (1) Apply τροφή filter
- τόπος (1) Apply τόπος filter
- υγροβιότοποι (1) Apply υγροβιότοποι filter
- υγρότοπο (1) Apply υγρότοπο filter
- υλοποίηση (1) Apply υλοποίηση filter
- φωλιά (2) Apply φωλιά filter
- χαρακτηριστικά (1) Apply χαρακτηριστικά filter
- χειμωνιάτικη τοποθεσία (1) Apply χειμωνιάτικη τοποθεσία filter
- χελώνα (1) Apply χελώνα filter
- ψαροφάγα (1) Apply ψαροφάγα filter
Journal
- 10th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions (5) Apply 10th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions filter
- 12th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions (5) Apply 12th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions filter
- 3° Συνέδριο Ελληνικής Οικολογικής Εταιρείας & Ελληνικής Ζωολογικής Εταιρείας <<Οικολογία και Διατήρηση της Βιοποικιλότητας>> (1) Apply 3° Συνέδριο Ελληνικής Οικολογικής Εταιρείας & Ελληνικής Ζωολογικής Εταιρείας <<Οικολογία και Διατήρηση της Βιοποικιλότητας>> filter
- 3° Συνέδριο Ελληνικής Οικολογικής Εταιρείας & Ελληνικής Ζωολογικής Εταιρείας <<Οικολογία και Διατήρηση της Βιοποικιλότητας>> (2) Apply 3° Συνέδριο Ελληνικής Οικολογικής Εταιρείας & Ελληνικής Ζωολογικής Εταιρείας <<Οικολογία και Διατήρηση της Βιοποικιλότητας>> filter
- 4ο Πανελλήνιο Συνέδριο - Σύγχρονες Τάσεις της Έρευνας στην Οικολογία (3) Apply 4ο Πανελλήνιο Συνέδριο - Σύγχρονες Τάσεις της Έρευνας στην Οικολογία filter
- 6ο Πανελλήνιο Συνέδριο Οικολογίας (1) Apply 6ο Πανελλήνιο Συνέδριο Οικολογίας filter