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| Jerez, B.; Hernández, D.R.; Giussi, A.R.; Malaspina, A.M.. |
| To determine the existence of different population units of longtail hake (Macruronus magellanicus) of the Argentine Sea, the meristic and morphometric characters of 861 specimens from two different areas were studied measuring 24 body distances with the landmark methods. Besides, the relation among weight, width and thickness of 806 pairs of sagittae otoliths as a function of length and sex of individuals was analyzed. Using the General Linear Model, the Principal Component Analysis and the Multivariate Analysis of Variance the fitted morphometric variables, the meristic characters and their relation to the Area and Sex factors were assessed. The variability observed does not show any conclusive evidence about the existence of more than one stock in the... |
| Tipo: Journal Contribution |
Palavras-chave: Stock identification; Meristic counts; Morphometry; Otoliths. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5490 |
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| Pineda, S.E.; Hernandez, D.R.; Brunetti, N.E.; Jerez, B.. |
| Morphological characters of two loliginid squids, Loligo gahi and Loligo sanpaulensis, in the SW Atlantic region off Argentina were studied to obtain a diagnostic criterion for their identification. Emphasis was placed on the taxonomic characters suitable to identify individuals in the whole size range. Considering the uncertainty associated to the correct identification of juveniles, their taxonomic status was confirmed using electrophoretic studies. Discrimination between species based on morphological characters proved to be more effective than meristic counts. A discriminant function that allows an easy separation of the two species is presented. The function, composed of two indices: fin width mantle length (FW/ML)and gladius width mantle length... |
| Tipo: Journal Contribution |
Palavras-chave: Meristic counts; Morphometry; Electrophoresis; Electrophoresis; Http://aims.fao.org/aos/agrovoc/c_2523. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/1583 |
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