TAILIEUCHUNG - Study on the vertebral column of the large tooth flounder, pseudorhombus arsius (hamilton, 1822) collected from oman sea
Based on morphometry, the vertebral column of Pseudorhombus arsius may be divided into four morphologically distinct regions. The biometrical study of the length, height and width of the successive vertebrae constituting the vertebral column of Pseudorhombus arsius allows characteristic vertebral profiles to be drawn. The differences in length of vertebrae present in different regions of the vertebral column cause regionalization in this structure. These morphological descriptive parameters express a morphotype which seems to have a functional link with the anguilliform mode of swimming of the large tooth flounder. | Journal of Marine Science and Technology; Vol. 14, No. 1; 2014: 32-39 ISSN: 1859-3097 STUDY ON THE VERTEBRAL COLUMN OF THE LARGE TOOTH FLOUNDER, PSEUDORHOMBUS ARSIUS (HAMILTON, 1822) COLLECTED FROM OMAN SEA Laith A. Jawad Manukau, Auckland, New Zealand E-mail: laith_jawad@ Received: 23-11-2013 ABSTRACT: Based on morphometry, the vertebral column of Pseudorhombus arsius may be divided into four morphologically distinct regions. The biometrical study of the length, height and width of the successive vertebrae constituting the vertebral column of Pseudorhombus arsius allows characteristic vertebral profiles to be drawn. The differences in length of vertebrae present in different regions of the vertebral column cause regionalization in this structure. These morphological descriptive parameters express a morphotype which seems to have a functional link with the anguilliform mode of swimming of the large tooth flounder. Key words: Morphometry, vertebral column, Pseudorhombus arsius, regionalization. INTRODUCTION Pseudorhombus arsius (the large tooth flounder) is considered among the most commercial importance fish species in Oman. Its landing in Sultanate of Oman showed a dramatic increase during the last decade to several hundred tons [17]. The study of the taxonomy of this species in general and the skeletal characters in particular have not been receiving considerable attention in this region so far. Vertebrates show variation in the degree of regionalization of the vertebral column. Such differences in the morphology of vertebrae of different regions of vertebral column can be revealed by biometrical studies [10, 11, 4]. The vertebral column of actinopterygian fishes has two basic regions: the pre-anal abdominal region and the post-anal caudal region [7], with marked diversity in vertebral form within these regions [2, 6, 7, 18]. The abdominal region may include, from anterior to posterior, occipital 32 vertebrae .
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