COMPARATIVE STUDY OF THE BIOLOGY AND DYNAMICS OF THE FISH CHALCALBURNUS CHALCOIDES MACEDONICUS STEPHANIDIS, 1971 (PISCES: CYPRINIDAE) OF THE SYSTEMS VOLVI ANDVISTONIS
Abstract
IN THIS STUDY THERE WAS A COMPARATIVE EXAMINATION OF THE GROWTH, FECUNDITY AND REPRODUCTION OF AN ENDEMIC SUBSPECIES OF FISH CHALCALBURNUS CHALCOIDES MACEDONICUS, STEPHANIDIS 1971, IN THE LAKES VOLVI AND VISTONIS OF NORTHERN GREECE.THE DETERMINATION OF AGE WAS EFFECTED FROM SCALES. THE EXAMINATION OF GROWTH WAS IN ANNUAL (OBSERVED AND BACKCALCULATED) AND SEASONAL BASE (MONTHLY AND SEASONAL) TO THE LENGTH AND WEIGHT OF FISH, BY SEX OR INDEPENDENTLY SEX. IT WAS CALCULATED THE CONDITION FACTOR, THE GONADOSOMATIC INDEX THE ABSOLUTE AND RELATIVE FECUNDITY OF THE FISH AND ITS RELATION WITH THE LENGTH, WEIGHT AND AGE. IT WAS OBSERVED ONE MORE RAPID GROWTH IN YOUNGER AGES (<IV), ONE SLIGHT SUPERIORITY OF FEMALES TO MALES (NOT ALWAYS) AND ONE GREATER GROWTH FOR THE FISH FROM VISTONIS COMPARATIVELY WITH THOSE FROM VOLVI AND MAINLY IN OLDER AGES (>IV).THE MOST RAPID SEASONALY GROWTH IS IN AUTOMN. IT WAS FOUND OUT THAT CH. CH. MACEDONICUS IS ANADROMOUS FISH FOR ITS REPRODUCTIVE HAB ...
show more
Download full text in PDF format (12.25 MB)
(Available only to registered users)
|
All items in National Archive of Phd theses are protected by copyright.
|
Usage statistics
VIEWS
Concern the unique Ph.D. Thesis' views for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
ONLINE READER
Concern the online reader's opening for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
DOWNLOADS
Concern all downloads of this Ph.D. Thesis' digital file.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.
USERS
Concern all registered users of National Archive of Ph.D. Theses who have interacted with this Ph.D. Thesis. Mostly, it concerns downloads.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.