{"id":{"repo_id":"greece","oai_identifier":"oai:10442/1296"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/1296","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΜΕΛΕΤΗ ΟΡΜΟΝΩΝ ΤΟΥ ΘΥΡΕΟΕΙΔΗ ΣΤΗΝ ΙΡΙΔΙΖΟΥΣΑ ΠΕΣΤΡΟΦΑ, ΜΕ ΜΕΤΑΘΕΣΗ ΤΗΣ ΓΕΝΕΤΙΚΗΣ ΩΡΙΜΟΤΗΤΑΣ ΑΠΟ ΤΡΟΠΟΠΟΙΗΣΗ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ","abstract":"THE AIM OF THIS STUDY WAS TO INVESTIGATE: A) THE EFFECT OF PHOTOPERIOD IN GONADOL MATURITY AND SPAWNING TIME OF TWO STRAINS OF RAINBOW TROUT (SALMO GAIRDUERI SHASTA/KAMLOOPS), B) THE EFFECT OF PHOTOPERIOD ON PLASMA THYROID HORMONES AND C) THE ROLE OF THYROID HORMONES IN TROUT GONADOL MATURITY DURING THE 1ST AND 2NDREPRODUCTIVE CYCLE. TWO SEASONALLY-CHANGING PHOTOPERIOD REGIMES WERE USED. BOTH STRAINS RESPONDED SIMILARLY TO THE CHOSEN ARTIFICIAL REGIME. EXPOSURE OF TROUT TO THE \"LONG\" SPRING DAYS PROTOCOL ACCELARATED SPAWNING 8-13 WEEKS AND EXTENDED (ABOUT FOUR FOLDS) THE DURATION OF SPAWNING PERIOD. THE \"REVERSE\" REGIME DELAYED SPAWNING 5-8 WEEKS AND DIMINISHED THE DURATION OF SPAWNING PERIOD . NO STATISTICAL DIFFERENCE OCCURED IN THE QUALITY AND QUANTITY OF EGGS AND FRY, IN ALLGROUPS. SEASONAL VARIATIONS OF THYROID CIRCULATING HORMONES (T3, T4) AND ALSO IN THE RATIO T4/T3 OCCURED IN BOTH STRAINS. NO STATISTICAL DIFFERENCE WAS FOUNDIN T3, T4 LEVELS BETWEEN MALE AND FEMALE TROUT. MAXIMUM CONCENTRATIONS OF T3, T4 WERE RECORDED IN LATE WINTER-EARLY SPRING AND MINIMUM DURING SPAWNING. STATISTICALLY LOWER VALUES OF T3, T4 WERE FOUND IN MATURE FEMALE FISH AS COMPARED TOIMMATURE. A SEX-RELATED DIFFERENCE IN PLASMA T3, T4 LEVELS AND MATURITY STAGESWAS OBSERVED. SEVERAL DIFFERENCES WERE FOUND IN THE ABSOLUTE AND RELATIVE T3, T4 CONCENTRATIONS AND ALSO IN THE PROFILE OF THYROID HORMONES BETWEEN THE 1ST AND 2ND REPRODUCTIVE CYCLE. SIMILAR PROFILE OF SEASONAL VARIATIONS OF T3, T4 OCCURED IN THE TWO STRAINS.","abstract_html":"THE AIM OF THIS STUDY WAS TO INVESTIGATE: A) THE EFFECT OF PHOTOPERIOD IN GONADOL MATURITY AND SPAWNING TIME OF TWO STRAINS OF RAINBOW TROUT (SALMO GAIRDUERI SHASTA/KAMLOOPS), B) THE EFFECT OF PHOTOPERIOD ON PLASMA THYROID HORMONES AND C) THE ROLE OF THYROID HORMONES IN TROUT GONADOL MATURITY DURING THE 1ST AND 2NDREPRODUCTIVE CYCLE. TWO SEASONALLY-CHANGING PHOTOPERIOD REGIMES WERE USED. BOTH STRAINS RESPONDED SIMILARLY TO THE CHOSEN ARTIFICIAL REGIME. EXPOSURE OF TROUT TO THE "LONG" SPRING DAYS PROTOCOL ACCELARATED SPAWNING 8-13 WEEKS AND EXTENDED (ABOUT FOUR FOLDS) THE DURATION OF SPAWNING PERIOD. THE "REVERSE" REGIME DELAYED SPAWNING 5-8 WEEKS AND DIMINISHED THE DURATION OF SPAWNING PERIOD . NO STATISTICAL DIFFERENCE OCCURED IN THE QUALITY AND QUANTITY OF EGGS AND FRY, IN ALLGROUPS. SEASONAL VARIATIONS OF THYROID CIRCULATING HORMONES (T3, T4) AND ALSO IN THE RATIO T4/T3 OCCURED IN BOTH STRAINS. NO STATISTICAL DIFFERENCE WAS FOUNDIN T3, T4 LEVELS BETWEEN MALE AND FEMALE TROUT. MAXIMUM CONCENTRATIONS OF T3, T4 WERE RECORDED IN LATE WINTER-EARLY SPRING AND MINIMUM DURING SPAWNING. STATISTICALLY LOWER VALUES OF T3, T4 WERE FOUND IN MATURE FEMALE FISH AS COMPARED TOIMMATURE. A SEX-RELATED DIFFERENCE IN PLASMA T3, T4 LEVELS AND MATURITY STAGESWAS OBSERVED. SEVERAL DIFFERENCES WERE FOUND IN THE ABSOLUTE AND RELATIVE T3, T4 CONCENTRATIONS AND ALSO IN THE PROFILE OF THYROID HORMONES BETWEEN THE 1ST AND 2ND REPRODUCTIVE CYCLE. SIMILAR PROFILE OF SEASONAL VARIATIONS OF T3, T4 OCCURED IN THE TWO STRAINS.","abstract_has_math":false,"creators":["Pavlidis, Michail","Παυλίδης, Μιχαήλ"],"institution":"National and Kapodistrian University of Athens","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1990,"date_issued":"1990","date_published":"1990","updated_at":"2026-07-24T02:24:49Z","subjects":["Αναπαραγωγή","Θυρεοειδής","Ιριδίζουσα πέστροφα","Ορμόνες","ΦΩΤΟΠΕΡΙΟΔΟΣ","Hormones","PHOTOPERIOD","Rainbow trout","Reproduction","Thyroid","Φυσικές Επιστήμες","Βιολογία","Natural Sciences","Biological Sciences"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1296"],"render_values":[{"text":"10.12681/eadd/1296","href":"https://doi.org/10.12681/eadd/1296","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/1296","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Pavlidis, Michail","Παυλίδης, Μιχαήλ"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1990"]},{"key":"dc:publisher","label":"Institution","values":["National and Kapodistrian University of Athens","Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Αναπαραγωγή","Θυρεοειδής","Ιριδίζουσα πέστροφα","Ορμόνες","ΦΩΤΟΠΕΡΙΟΔΟΣ","Hormones","PHOTOPERIOD","Rainbow trout","Reproduction","Thyroid","Φυσικές Επιστήμες","Βιολογία","Natural Sciences","Biological Sciences"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1296","http://hdl.handle.net/10442/hedi/1296"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["THE AIM OF THIS STUDY WAS TO INVESTIGATE: A) THE EFFECT OF PHOTOPERIOD IN GONADOL MATURITY AND SPAWNING TIME OF TWO STRAINS OF RAINBOW TROUT (SALMO GAIRDUERI SHASTA/KAMLOOPS), B) THE EFFECT OF PHOTOPERIOD ON PLASMA THYROID HORMONES AND C) THE ROLE OF THYROID HORMONES IN TROUT GONADOL MATURITY DURING THE 1ST AND 2NDREPRODUCTIVE CYCLE. TWO SEASONALLY-CHANGING PHOTOPERIOD REGIMES WERE USED. BOTH STRAINS RESPONDED SIMILARLY TO THE CHOSEN ARTIFICIAL REGIME. EXPOSURE OF TROUT TO THE \"LONG\" SPRING DAYS PROTOCOL ACCELARATED SPAWNING 8-13 WEEKS AND EXTENDED (ABOUT FOUR FOLDS) THE DURATION OF SPAWNING PERIOD. THE \"REVERSE\" REGIME DELAYED SPAWNING 5-8 WEEKS AND DIMINISHED THE DURATION OF SPAWNING PERIOD . NO STATISTICAL DIFFERENCE OCCURED IN THE QUALITY AND QUANTITY OF EGGS AND FRY, IN ALLGROUPS. SEASONAL VARIATIONS OF THYROID CIRCULATING HORMONES (T3, T4) AND ALSO IN THE RATIO T4/T3 OCCURED IN BOTH STRAINS. NO STATISTICAL DIFFERENCE WAS FOUNDIN T3, T4 LEVELS BETWEEN MALE AND FEMALE TROUT. MAXIMUM CONCENTRATIONS OF T3, T4 WERE RECORDED IN LATE WINTER-EARLY SPRING AND MINIMUM DURING SPAWNING. STATISTICALLY LOWER VALUES OF T3, T4 WERE FOUND IN MATURE FEMALE FISH AS COMPARED TOIMMATURE. A SEX-RELATED DIFFERENCE IN PLASMA T3, T4 LEVELS AND MATURITY STAGESWAS OBSERVED. SEVERAL DIFFERENCES WERE FOUND IN THE ABSOLUTE AND RELATIVE T3, T4 CONCENTRATIONS AND ALSO IN THE PROFILE OF THYROID HORMONES BETWEEN THE 1ST AND 2ND REPRODUCTIVE CYCLE. SIMILAR PROFILE OF SEASONAL VARIATIONS OF T3, T4 OCCURED IN THE TWO STRAINS.","ΜΕΛΕΤΗΘΗΚΑΝ: Α) Ο ΡΟΛΟΣ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ ΣΤΟΝ ΕΛΕΓΧΟ ΤΗΣ ΓΟΝΑΔΙΚΗΣ ΩΡΙΜΑΝΣΗΣ ΚΑΙ ΣΤΟ ΧΡΟΝΟ ΕΝΑΡΞΗΣ ΚΑΙ ΔΙΑΡΚΕΙΑΣ ΤΗΣ ΠΕΡΙΟΔΟΥ ΚΑΤΟΙΚΙΑΣ, ΣΕ ΔΥΟ ΠΟΙΚΙΛΙΕΣ ΠΕΣΤΡΟΦΑΣ (SALMO GAIRDUERI SHASTA/KAMLOOPS), B) Η ΕΠΙΔΡΑΣΗ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ ΣΤΑ ΕΠΙΠΕΔΑ ΠΛΑΣΜΑΤΟΣ ΤΩΝ ΘΥΡΕΟΕΙΔΙΚΩΝ ΟΡΜΟΝΩΝ (Τ3, Τ4) ΚΑΙ Γ) Ο ΡΟΛΟΣ ΤΩΝ ΘΥΡΕΟΕΙΔΙΚΩΝ ΟΡΜΟΝΩΝ ΣΤΗ ΓΟΝΑΔΙΚΗ ΩΡΙΜΑΝΣΗ. Η ΜΕΛΕΤΗ ΑΦΟΡΟΥΣΕ ΤΟΝ 1Ο ΚΑΙ 2Ο ΑΝΑΠΑΡΑΓΩΓΙΚΟ ΚΥΚΛΟ ΚΑΙ ΧΡΗΣΙΜΟΠΟΙΗΘΗΚΑΝ ΔΥΟ ΕΠΟΧΙΑΚΑ ΜΕΤΑΒΑΛΛΟΜΕΝΑ ΦΩΤΟΠΕΡΙΟΔΙΚΑ ΠΡΩΤΟΚΟΛΛΑ.ΟΙ ΔΥΟ ΠΟΙΚΙΛΙΕΣ ΑΝΤΑΠΟΚΡΙΘΗΚΑΝ ΠΑΡΟΜΟΙΑ ΣΤΗΝ ΦΩΤΟΠΕΡΙΟΔΟ. ΤΑ ΠΡΩΤΟΚΟΛΛΑ \"ΜΑΚΡΩΝ\" ΑΝΟΙΞΙΑΤΙΚΩΝ ΗΜΕΡΩΝ ΕΠΙΤΑΧΥΝΕ ΤΗΝ ΩΟΤΟΚΙΑ ΚΑΤΑ 8-13 ΕΒΔΟΜΑΔΕΣ, ΚΑΙ ΔΙΕΥΡΥΝΕΤΗ ΔΙΑΡΚΕΙΑ ΤΗΣ (ΠΕΡΙΠΟΥ 4 ΦΟΡΕΣ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟΥΣ ΜΑΡΤΥΡΕΣ). ΤΟ \"ΑΝΑΣΤΡΟΦΟ\" ΠΡΩΤΟΚΟΛΛΟ ΕΠΙΒΡΑΔΥΝΕ ΤΗΝ ΩΟΤΟΚΙΑ ΚΑΤΑ 5-8 ΕΒΔΟΜΑΔΕΣ ΚΑΙ ΕΛΑΤΩΣΕ ΤΗ ΔΙΑΡΚΕΙΑ ΤΗΣ.Η ΦΩΤΟΠΕΡΙΟΔΟΣ ΔΕΝ ΕΠΗΡΕΑΣΕ ΤΗΝ ΠΟΙΟΤΗΤΑ ΚΑΙ ΠΟΣΟΤΗΤΑ ΤΩΝ ΠΑΡΑΓΟΜΕΝΩΝ ΑΥΓΩΝ ΣΕΣΧΕΣΗ ΜΕ ΤΟΥΣ ΜΑΡΤΥΡΕΣ. ΠΑΡΑΤΗΡΗΘΗΚΑΝ ΕΠΟΧΙΑΚΕΣ ΑΛΛΑΓΕΣ ΣΤΑ ΕΠΙΠΕΔΑ ΠΛΑΣΜΑΤΟΣ ΤΩΝ Τ3, Τ4 ΚΑΘΩΣ ΚΑΙ ΤΟΥ ΛΟΓΟΥ Τ4/Τ3. ΔΕΝ ΣΗΜΕΙΩΘΗΚΑΝ ΔΙΑΦΟΡΕΣ ΦΥΛΟΥ ΣΤΑ ΕΠΙΠΕΔΑ ΤΩΝ Τ3, Τ4. ΜΕΓΙΣΤΕΣ ΣΥΓΚΕΝΤΡΩΣΕΙΣ ΠΑΡΑΤΗΡΗΘΗΚΑΝ ΤΕΛΗ ΧΕΙΜΩΝΑ, ΑΡΧΕΣ ΑΝΟΙΞΗΣ ΚΑΙ ΕΛΑΧΙΣΤΕΣ ΓΥΡΩ ΑΠΟ ΤΗΝ ΠΕΡΙΟΔΟ ΩΟΤΟΚΙΑΣ. ΣΤΑ ΩΡΙΜΑ ΘΗΛΥΚΑ ΣΗΜΕΙΩΘΗΚΑΝ ΣΤΑΤΙΣΤΙΚΑ ΧΑΜΗΛΟΤΕΡΕΣ ΣΥΓΚΕΝΤΡΩΣΕΙΣ Τ3, Τ4 ΣΥΓΚΡΙΝΟΜΕΝΑ ΜΕ ΤΑ ΑΝΩΡΙΜΑ. ΠΑΡΑΤΗΡΗΘΗΚΑΝ ΔΙΑΦΟΡΕΣ ΣΤΗ ΣΥΣΧΕΤΙΣΗ ΤΩΝ ΣΥΓΚΕΝΤΡΩΣΕΩΝ Τ3, Τ4 ΜΕ ΤΑ ΣΤΑΔΙΑ ΓΟΝΑΔΙΚΗΣ ΩΡΙΜΑΝΣΗΣ ΜΕΤΑΞΥ ΤΩΝ ΔΥΟ ΦΥΛΩΝ. ΕΠΙΣΗΣ ΔΙΑΦΟΡΕΣ ΣΤΙΣ ΑΠΟΛΥΤΕΣ ΚΑΙ ΣΧΕΤΙΚΕΣ ΣΥΓΚΕΝΤΡΩΣΕΙΣ ΤΩΝ Τ3, Τ4 ΚΑΘΩΣ ΚΑΙ ΣΤΟΝ ΑΡΙΘΜΟ ΚΑΙ ΧΡΟΝΟ ΕΜΦΑΝΙΣΗΣ ΤΩΝ ΜΕΓΙΣΤΩΝ ΣΥΓΚΕΝΤΡΩΣΕΩΝ ΜΕΤΑΞΥ 1ΟΥ ΚΑΙ 2ΟΥ ΑΝΑΠΑΡΑΓΩΓΙΚΟΥ ΚΥΚΛΟΥ. ΟΙ ΔΥΟ ΠΟΙΚΙΛΙΕΣ ΕΜΦΑΝΙΣΑΝ ΠΑΡΟΜΟΙΕΣ ΕΠΟΧΙΑΚΕΣ ΔΙΑΚΥΜΑΝΣΕΙΣ ΤΩΝ Τ3, Τ4."]},{"key":"dc:title","label":"Title","values":["ΜΕΛΕΤΗ ΟΡΜΟΝΩΝ ΤΟΥ ΘΥΡΕΟΕΙΔΗ ΣΤΗΝ ΙΡΙΔΙΖΟΥΣΑ ΠΕΣΤΡΟΦΑ, ΜΕ ΜΕΤΑΘΕΣΗ ΤΗΣ ΓΕΝΕΤΙΚΗΣ ΩΡΙΜΟΤΗΤΑΣ ΑΠΟ ΤΡΟΠΟΠΟΙΗΣΗ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ","STUDY OF THYROID HORMONES IN RAINBOW TROUT, WITH SIFT OF THE GONADAL MATURATIONUNDER MANIPULATION OF THE PHOTOPERIOD"]}]}],"canonical_facts":{"dc:creator":["Pavlidis, Michail","Παυλίδης, Μιχαήλ"],"dc:date":["1990"],"dc:description":["THE AIM OF THIS STUDY WAS TO INVESTIGATE: A) THE EFFECT OF PHOTOPERIOD IN GONADOL MATURITY AND SPAWNING TIME OF TWO STRAINS OF RAINBOW TROUT (SALMO GAIRDUERI SHASTA/KAMLOOPS), B) THE EFFECT OF PHOTOPERIOD ON PLASMA THYROID HORMONES AND C) THE ROLE OF THYROID HORMONES IN TROUT GONADOL MATURITY DURING THE 1ST AND 2NDREPRODUCTIVE CYCLE. TWO SEASONALLY-CHANGING PHOTOPERIOD REGIMES WERE USED. BOTH STRAINS RESPONDED SIMILARLY TO THE CHOSEN ARTIFICIAL REGIME. EXPOSURE OF TROUT TO THE \"LONG\" SPRING DAYS PROTOCOL ACCELARATED SPAWNING 8-13 WEEKS AND EXTENDED (ABOUT FOUR FOLDS) THE DURATION OF SPAWNING PERIOD. THE \"REVERSE\" REGIME DELAYED SPAWNING 5-8 WEEKS AND DIMINISHED THE DURATION OF SPAWNING PERIOD . NO STATISTICAL DIFFERENCE OCCURED IN THE QUALITY AND QUANTITY OF EGGS AND FRY, IN ALLGROUPS. SEASONAL VARIATIONS OF THYROID CIRCULATING HORMONES (T3, T4) AND ALSO IN THE RATIO T4/T3 OCCURED IN BOTH STRAINS. NO STATISTICAL DIFFERENCE WAS FOUNDIN T3, T4 LEVELS BETWEEN MALE AND FEMALE TROUT. MAXIMUM CONCENTRATIONS OF T3, T4 WERE RECORDED IN LATE WINTER-EARLY SPRING AND MINIMUM DURING SPAWNING. STATISTICALLY LOWER VALUES OF T3, T4 WERE FOUND IN MATURE FEMALE FISH AS COMPARED TOIMMATURE. A SEX-RELATED DIFFERENCE IN PLASMA T3, T4 LEVELS AND MATURITY STAGESWAS OBSERVED. SEVERAL DIFFERENCES WERE FOUND IN THE ABSOLUTE AND RELATIVE T3, T4 CONCENTRATIONS AND ALSO IN THE PROFILE OF THYROID HORMONES BETWEEN THE 1ST AND 2ND REPRODUCTIVE CYCLE. SIMILAR PROFILE OF SEASONAL VARIATIONS OF T3, T4 OCCURED IN THE TWO STRAINS.","ΜΕΛΕΤΗΘΗΚΑΝ: Α) Ο ΡΟΛΟΣ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ ΣΤΟΝ ΕΛΕΓΧΟ ΤΗΣ ΓΟΝΑΔΙΚΗΣ ΩΡΙΜΑΝΣΗΣ ΚΑΙ ΣΤΟ ΧΡΟΝΟ ΕΝΑΡΞΗΣ ΚΑΙ ΔΙΑΡΚΕΙΑΣ ΤΗΣ ΠΕΡΙΟΔΟΥ ΚΑΤΟΙΚΙΑΣ, ΣΕ ΔΥΟ ΠΟΙΚΙΛΙΕΣ ΠΕΣΤΡΟΦΑΣ (SALMO GAIRDUERI SHASTA/KAMLOOPS), B) Η ΕΠΙΔΡΑΣΗ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ ΣΤΑ ΕΠΙΠΕΔΑ ΠΛΑΣΜΑΤΟΣ ΤΩΝ ΘΥΡΕΟΕΙΔΙΚΩΝ ΟΡΜΟΝΩΝ (Τ3, Τ4) ΚΑΙ Γ) Ο ΡΟΛΟΣ ΤΩΝ ΘΥΡΕΟΕΙΔΙΚΩΝ ΟΡΜΟΝΩΝ ΣΤΗ ΓΟΝΑΔΙΚΗ ΩΡΙΜΑΝΣΗ. Η ΜΕΛΕΤΗ ΑΦΟΡΟΥΣΕ ΤΟΝ 1Ο ΚΑΙ 2Ο ΑΝΑΠΑΡΑΓΩΓΙΚΟ ΚΥΚΛΟ ΚΑΙ ΧΡΗΣΙΜΟΠΟΙΗΘΗΚΑΝ ΔΥΟ ΕΠΟΧΙΑΚΑ ΜΕΤΑΒΑΛΛΟΜΕΝΑ ΦΩΤΟΠΕΡΙΟΔΙΚΑ ΠΡΩΤΟΚΟΛΛΑ.ΟΙ ΔΥΟ ΠΟΙΚΙΛΙΕΣ ΑΝΤΑΠΟΚΡΙΘΗΚΑΝ ΠΑΡΟΜΟΙΑ ΣΤΗΝ ΦΩΤΟΠΕΡΙΟΔΟ. ΤΑ ΠΡΩΤΟΚΟΛΛΑ \"ΜΑΚΡΩΝ\" ΑΝΟΙΞΙΑΤΙΚΩΝ ΗΜΕΡΩΝ ΕΠΙΤΑΧΥΝΕ ΤΗΝ ΩΟΤΟΚΙΑ ΚΑΤΑ 8-13 ΕΒΔΟΜΑΔΕΣ, ΚΑΙ ΔΙΕΥΡΥΝΕΤΗ ΔΙΑΡΚΕΙΑ ΤΗΣ (ΠΕΡΙΠΟΥ 4 ΦΟΡΕΣ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟΥΣ ΜΑΡΤΥΡΕΣ). ΤΟ \"ΑΝΑΣΤΡΟΦΟ\" ΠΡΩΤΟΚΟΛΛΟ ΕΠΙΒΡΑΔΥΝΕ ΤΗΝ ΩΟΤΟΚΙΑ ΚΑΤΑ 5-8 ΕΒΔΟΜΑΔΕΣ ΚΑΙ ΕΛΑΤΩΣΕ ΤΗ ΔΙΑΡΚΕΙΑ ΤΗΣ.Η ΦΩΤΟΠΕΡΙΟΔΟΣ ΔΕΝ ΕΠΗΡΕΑΣΕ ΤΗΝ ΠΟΙΟΤΗΤΑ ΚΑΙ ΠΟΣΟΤΗΤΑ ΤΩΝ ΠΑΡΑΓΟΜΕΝΩΝ ΑΥΓΩΝ ΣΕΣΧΕΣΗ ΜΕ ΤΟΥΣ ΜΑΡΤΥΡΕΣ. ΠΑΡΑΤΗΡΗΘΗΚΑΝ ΕΠΟΧΙΑΚΕΣ ΑΛΛΑΓΕΣ ΣΤΑ ΕΠΙΠΕΔΑ ΠΛΑΣΜΑΤΟΣ ΤΩΝ Τ3, Τ4 ΚΑΘΩΣ ΚΑΙ ΤΟΥ ΛΟΓΟΥ Τ4/Τ3. ΔΕΝ ΣΗΜΕΙΩΘΗΚΑΝ ΔΙΑΦΟΡΕΣ ΦΥΛΟΥ ΣΤΑ ΕΠΙΠΕΔΑ ΤΩΝ Τ3, Τ4. ΜΕΓΙΣΤΕΣ ΣΥΓΚΕΝΤΡΩΣΕΙΣ ΠΑΡΑΤΗΡΗΘΗΚΑΝ ΤΕΛΗ ΧΕΙΜΩΝΑ, ΑΡΧΕΣ ΑΝΟΙΞΗΣ ΚΑΙ ΕΛΑΧΙΣΤΕΣ ΓΥΡΩ ΑΠΟ ΤΗΝ ΠΕΡΙΟΔΟ ΩΟΤΟΚΙΑΣ. ΣΤΑ ΩΡΙΜΑ ΘΗΛΥΚΑ ΣΗΜΕΙΩΘΗΚΑΝ ΣΤΑΤΙΣΤΙΚΑ ΧΑΜΗΛΟΤΕΡΕΣ ΣΥΓΚΕΝΤΡΩΣΕΙΣ Τ3, Τ4 ΣΥΓΚΡΙΝΟΜΕΝΑ ΜΕ ΤΑ ΑΝΩΡΙΜΑ. ΠΑΡΑΤΗΡΗΘΗΚΑΝ ΔΙΑΦΟΡΕΣ ΣΤΗ ΣΥΣΧΕΤΙΣΗ ΤΩΝ ΣΥΓΚΕΝΤΡΩΣΕΩΝ Τ3, Τ4 ΜΕ ΤΑ ΣΤΑΔΙΑ ΓΟΝΑΔΙΚΗΣ ΩΡΙΜΑΝΣΗΣ ΜΕΤΑΞΥ ΤΩΝ ΔΥΟ ΦΥΛΩΝ. ΕΠΙΣΗΣ ΔΙΑΦΟΡΕΣ ΣΤΙΣ ΑΠΟΛΥΤΕΣ ΚΑΙ ΣΧΕΤΙΚΕΣ ΣΥΓΚΕΝΤΡΩΣΕΙΣ ΤΩΝ Τ3, Τ4 ΚΑΘΩΣ ΚΑΙ ΣΤΟΝ ΑΡΙΘΜΟ ΚΑΙ ΧΡΟΝΟ ΕΜΦΑΝΙΣΗΣ ΤΩΝ ΜΕΓΙΣΤΩΝ ΣΥΓΚΕΝΤΡΩΣΕΩΝ ΜΕΤΑΞΥ 1ΟΥ ΚΑΙ 2ΟΥ ΑΝΑΠΑΡΑΓΩΓΙΚΟΥ ΚΥΚΛΟΥ. ΟΙ ΔΥΟ ΠΟΙΚΙΛΙΕΣ ΕΜΦΑΝΙΣΑΝ ΠΑΡΟΜΟΙΕΣ ΕΠΟΧΙΑΚΕΣ ΔΙΑΚΥΜΑΝΣΕΙΣ ΤΩΝ Τ3, Τ4."],"dc:identifier":["10.12681/eadd/1296","http://hdl.handle.net/10442/hedi/1296"],"dc:language":["gre"],"dc:publisher":["National and Kapodistrian University of Athens","Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)"],"dc:subject":["Αναπαραγωγή","Θυρεοειδής","Ιριδίζουσα πέστροφα","Ορμόνες","ΦΩΤΟΠΕΡΙΟΔΟΣ","Hormones","PHOTOPERIOD","Rainbow trout","Reproduction","Thyroid","Φυσικές Επιστήμες","Βιολογία","Natural Sciences","Biological Sciences"],"dc:title":["ΜΕΛΕΤΗ ΟΡΜΟΝΩΝ ΤΟΥ ΘΥΡΕΟΕΙΔΗ ΣΤΗΝ ΙΡΙΔΙΖΟΥΣΑ ΠΕΣΤΡΟΦΑ, ΜΕ ΜΕΤΑΘΕΣΗ ΤΗΣ ΓΕΝΕΤΙΚΗΣ ΩΡΙΜΟΤΗΤΑΣ ΑΠΟ ΤΡΟΠΟΠΟΙΗΣΗ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ","STUDY OF THYROID HORMONES IN RAINBOW TROUT, WITH SIFT OF THE GONADAL MATURATIONUNDER MANIPULATION OF THE PHOTOPERIOD"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:24:49Z"}