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Identifier |
000376376 |
Title |
Μελέτη της συμπεριφοράς διαφυγής του λαβρακιού Dicentrarchus labrax σε συνθήκες εκτροφής |
Alternative Title |
Study of escape behavior of dicentrarchus labrax in reading conditions |
Author
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Πετρούτσος, Σπυρίδων- Ιάσων
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Thesis advisor
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Κεντούρη, Μαρουδιώ
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Reviewer
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Καρακάσης, Ιωάννης
Divanach, Pascal
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Abstract |
European sea bass (Dicentrarchus labrax), a mainly farmed species in the Mediterranean aquaculture has been sporadically reported to escape from sea cage facilities. However, this specific behavior has been occasionally documented. Fish escapes raise a number of concerns due to potential impact with the wild stocks through interbreeding, competition for food and mate as well as transfer of pathogens. The present study aims at the examination and monitor of sea bass escape behavior along with the investigation of the influence that a presence/absence of a visible obstacle could have of sea bass propensity to escape. Fish were initially confined into handmade sea cages, placed into a 30m3 tank. A tear was created at one side of the cages, allowing fish crossings. Fish activity was monitored by a computer vision system that developed for this purposes. From the result obtained, it is clearly demonstrated that sea bass is able to escape right after a tear appeared on the net surface. However, the presence of an obstacle close to the point of escape significantly reduced the escape rate of this species. Additionally, learning behavior and social interactions of sea bass were close related to the food provided at the specific time period. It is highly recommended on the aquaculturists to reconsider the orientation and location of sea bass culture facilities. Furthermore, the use of an extra net pen around the cage facilities as well as the presence of natural/artificial obstacle close the area of the cages could be considered as an efficient tool to mitigate the escape risk of farmed sea bass.
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Language |
Greek |
Subject |
Aquaculture |
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European sea boss |
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Ιχθυοκαλλιέργεια |
Issue date |
2012 |
Collection
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School/Department--School of Sciences and Engineering--Department of Biology--Post-graduate theses
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Type of Work--Post-graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/7/2/6/metadata-dlib-1353483914-7990-26253.tkl
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Views |
265 |