Condition and morphometric changes in tilapia (Oreochromis sp.) after an eradication attempt in Southern Louisiana

  • A hybrid form of tilapia was introduced into Port Sulphur, Louisiana and was subsequently managed by treatment with rotenone and stocking of native predatory fishes. Measurements of tilapia from before this management event were compared to measurements of tilapia in the two years after the treatment. Post-management tilapia were consistently deeper in body and had greater weight per unit length (condition) when compared to pre-management fish. Procrustes generalized least squares data supported this by consistently finding post-management tilapia to be consistently deeper in body and head shape than pre-management fish. Although this could indicate the effectiveness of stocking native predators, several other factors, including two cold winters, seasonal effects, and less competition, may have contributed to this result.

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Author:O. Thomas Lorenz, Patrick Smith, Lyndon Coghill
Parent Title (English):NeoBiota
Place of publication:[s.l.]
Document Type:Article
Date of Publication (online):2014/07/25
Date of first Publication:2014/01/24
Publishing Institution:Universit├Ątsbibliothek Johann Christian Senckenberg
Release Date:2014/07/25
Tag:Ivasive; cichlid; eradication; morphology; tilapia
Page Number:11
First Page:49
Last Page:59
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Sammlung Biologie / Sondersammelgebiets-Volltexte
Zeitschriften / Jahresberichte:NeoBiota / NeoBiota 20
Licence (German):License LogoCreative Commons - Namensnennung 3.0