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Morphological Differences Between two Populations of the Little Tunny, Euthynnus alletteratus (Rafinesque, 1810) in Tunisian Waters (Central Mediterranean Sea)

Morphological Differences Between two Populations of the Little Tunny, Euthynnus alletteratus (Rafinesque, 1810) in Tunisian Waters (Central Mediterranean Sea)

Hassen Allaya1,2,*, Abderraouf Ben Faleh1, Manel Rebaya1, Sonia Zrelli3, Abdallah Hattour2, Jean-Pierre Quignard4 and Monia Trabelsi1

1Marine Biology Unit, Faculty of Sciences of Tunis, University of Campus El Manar. Tunis, Tunisia
2National Institute of Sea Sciences and Technologies (I.N.S.T.M), 2025, Salammbô, Tunis, Tunisia
3Unit of Hydrobiology, Laboratory of Environment Biomonitoring (LBE), Faculty of Sciences of Bizerta, 7021 Jarzouna, Tunisia
4Laboratoire d’Ichtyologie, Université de Montpellier II, Sciences et Techniques Languedoc, Place Eugène Bataillon, Case 102, 34095, Montpellier Cedex 5, France

*      Corresponding author: hassen.allaya@yahoo.fr

Fig 1

Schematic drawing of Euthynnus alletteratus body with measured dimensions: snout sength (SnL), eye diameter, head length (HL), distance of pectoral fin (DP), distance of the first dorsal fin (DD1), distance of the second dorsal fin (DD2), distance of ventral fin (DV), distance of anal fin (DA), standard length (SL), fork length and total length (TL). 

Fig 2

The first (PC1) and second (PC2) principal component analysis for eleven morphometric characters in 64 individuals of E. alletteratus from Tunisia (□, Δ individuals belonging to Zarzis and Mahdia sampling sites, respectively).

Fig 3

Canonical variate analysis (CVA) of the 11 morphometric measurements examined between individuals of E. alletteratus, (□, Δ individuals belonging to Zarzis and Mahdia sampling sites, respectively (probability of the correct classification= 95.31 %)).

Pakistan Journal of Zoology (Associated Journals)

August

Vol. 49, Iss. 4, Pages 1151-1546

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