Is otolith microchemistry (Sr: Ca and Ba:Ca ratios) useful to identify Mugil curema populations in the southeastern Caribbean Sea?

Avigliano, Esteban; Fortunato, Roberta Callicó; Buitrago, Joaquín; Volpedo, Alejandra V.

doi:10.1590/1519-6984.01014

Cited by 15 publications

(20 citation statements)

References 32 publications

(45 reference statements)

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“…In this context, Avigliano et al (2015) evaluated the potential use of otolith microchemistry (Sr ÷ Ca and Ba ÷ Ca ratios) to identify the silver mullet, Mugil curema Valenciennes, 1836, populations in the south-eastern Caribbean Sea. In fact, the authors mentioned above, observed the existence of different groups of in this geographic area.…”

Section: Discussionmentioning

confidence: 99%

Otolith shape discrimination of Liza ramada (Actinopterygii: Mugiliformes: Mugilidae) from marine and estuarine populations in Tunisia

Rebaya¹,

Faleh²,

Khedher³

et al. 2017

Acta Ichthyol. Piscat.

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Background. The thinlip grey mullet, Liza ramada (Risso, 1810), is widespread in Tunisia. Despite its economic importance, the stock discrimination of this fish is poorly understood. The aim of this study is to investigate, for the first time, the stock discrimination of this species for two Tunisian populations based on the otolith shape, using different statistical approaches. Materials and methods. The specimens of L. ramada were collected during three months (from March to May 2013) at two sampling sites: the marine (Cap Zebib sea resort) and the estuarine (Mellegue Dam) in Tunisia. We analysed sagittal otolith shape variation for 120 individuals (60 fish of each study site comprising 30 males and 30 females) for both sexes (males and females) and two sides (left and right otolith) for each specimen. Results. Statistical-and discriminant function analysis of the sagittal otolith shape clearly demonstrated statistically significant differences from the two populations. These results were also confirmed by highly statistically significant difference between otolith shape (left and right) for both sexes. An asymmetry was detected when comparing otoliths of the same side (RR-LL) between different sampling sites. Conclusion. The shape variability of otolith between these two sampling sites is probably correlated with local environmental and ecological factors.

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Section: Discussionmentioning

confidence: 99%

Otolith shape discrimination of Liza ramada (Actinopterygii: Mugiliformes: Mugilidae) from marine and estuarine populations in Tunisia

Rebaya¹,

Faleh²,

Khedher³

et al. 2017

Acta Ichthyol. Piscat.

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“…The morphometrical study of these structures allows one to describe and compare their shapes quantitatively (Lestrel, ). Moreover, the use of Sr/Ca and Ba/Ca otolith ratios has been simultaneously studied by some authors as indicators of habitats, and for stock and migration studies (Avigliano, Callicó Fortunato, Buitrago, & Volpedo, ; Schuchert, Arkhipkin, & Koenig, ; Tabouret et al., ).…”

Section: Introductionmentioning

confidence: 99%

Otolith morphometry and microchemistry as habitat markers for juvenileMugil cephalusLinnaeus 1758 in nursery grounds in the Valencian community, Spain

2017

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Summary The aim of this study was to identify and characterize juvenile Mugil cephalus (flathead grey mullet) habitats in the Valencian community by means of otolith morphometry and microchemistry. Specimens (total length: 250–350 mm) were obtained from October 2011 to March 2012 with gill nets in two protected wetlands: the Parque Nartural de l'Albufera de Valencia (AV) (n = 45), a Mediterranean lake; and the Parque Natural Salinas de Santa Pola (SP) (n = 37), a coastal salt marsh. Otolith shape indices (circularity, rectangularity, aspect ratio, surface occupied by sulcus, ellipticity and form factor) and microchemistry (Sr/Ca and Ba/Ca ratios) were measured and compared as area markers. The chemical composition of the water in both areas was also obtained. Morphometric results showed, by an ANOVA with Bonferroni contrasts, that saccular otoliths from AV individuals had more edge complexity, hence a higher circularity index (p < .001), but that there was less otolith percentage occupied by the sulcus (p < .001). When analyzing the morphometric variables simultaneously, both sites differed significantly (Hotelling's T2 < 0.001). A paired t‐test among sites of the microchemical variables showed that otoliths of AV presented higher values of Ba/Ca ratios and lower Sr/Ca ratios (p < .001). This coincides with water values obtained and could be associated with the low salinity observed in the lake. The opposite pattern was observed in SP, both for otolith and water samples, this being associated with the high‐salinity waters of the area. Results obtained in the present research suggest, by the use of otolith morphometry and microchemistry, that the nursery grounds of juvenile M. cephalus in the Valencian community could be differentiated. Even though habitats could be separated using otolith morphometry, only a few of the studied shape indices were important in area differentiation. Nevertheless, the use of both methodologies simultaneously could be robust habitat markers for this species.

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“…La relación Ba/Ca no presentó diferencias significativas entre los bordes de los otolitos de peces de los tres humedales. Como se mencionó previamente, la concentración de Sr en otolitos correlaciona positivamente con la salinidad de agua frecuentada por el pez (Kraus y Secor, 2004;Sturrock et al, 2012), mientras que los valores de Ba correlacionan negativamente con la salinidad o conductividad de las masas de agua circundante (Elsdon y Gillanders, 2005;Tabouret et al, 2010;Miller, 2011;Avigliano et al, 2015c). Los resultados obtenidos evidencian que la relación Sr/Ca de los otolitos fue una variableútil para diferenciar peces que frecuentanáreas de mayor salinidad, como sucede con SP (posee una salinidad de 37,3 UPS) en relación a los otros humedales estudiados.…”

Section: Discussionunclassified

“…Además, Radtke y Shafer (1992) han sugerido que la composición química de los otolitos está regulada por la actividad fisiológica de los peces, que a su vez está influenciada por las condiciones ambientales. La morfometría y la microquímica de los otolitos han ayudado a la identificación de stocks de gran número de especies comerciales (Tuset et al, 2003b;Gillanders, 2005;Tracey et al, 2006;Tabouret et al, 2010;Avigliano et al, 2014;Avigliano et al, 2015c;Avigliano et al, 2015e;Sadighzadeh et al, 2014). El estudio de la forma y contorno del otolito ha permitido, también, identificar especies de una misma familia (Tuset et al, 2003a;Lestrel, 2008;Avigliano et al, 2015a).…”

Section: Introductionunclassified

“…Recientemente, el uso simultáneo de las relaciones Sr/Ca y Ba/Ca de los otolitos se ha profundizado para la identificación de stocks y el análisis de movimientos e historia de vida de los peces (Schuchert et al, 2010;Tabouret et al, 2010;Beer et al, 2011;Avigliano y Volpedo, 2013;Martin et al, 2013;Avigliano et al, 2015c). La concentración de estos elementos varía entre el agua dulce y la marina, resultandoútiles para entender el comportamiento ambiental de peces diádromos (Milton et al, 2008;Brown y Severin, 2009;Wang et al, 2010).…”

Section: Introductionunclassified

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Aplicación de los otolitos en el estudio de la interconectividad de stocks pesqueros de mugílidos de zonas costeras de la provincia de Buenos Aires, Argentina y de la costa Valenciana, España.

Fortunato¹,

Glenda²

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Otolith use in the study of fish stock connectivity of mugilids in coastal areas of Buenos Aires province, Argentina, and of Valencia, Spain. AbstractThe aim of this thesis was to identify mugilid stocks in the Southwestern Atlantic coast (25 • 30'S -40 • 32'S) and in the Mediterranean coast of the Valencia Community (38 • 08'N -40 • 38'N), and their connectivity using the morphology, morphometry and chemical composition of sagittae otoliths (complex carbonate structures located in the inner ear of the fish). Morphology of sagittal for 9 Mugilidae species was analyzed; thus, being able to differentiate them and generating an identification key for the species. Moreover, morphological patterns for family and genera were proposed.Given that otoliths vary along fish growth, ontogenetic patterns were identified for Mugil liza, Mugil cephalus and Liza ramada, describing, also, their biometric relations (standard fish length vs length-width of the otolith). In regard to the identification of fish stocks, by means of morphometrical indices (circularity, rectangularity, aspect ratio, percentage occupied by the sulcus, ellipticity and form factor) and otolith microchemistry (Sr/Ca and Ba/Ca ratios), different behavioral patterns related to habitat use of Mugil liza and Mugil cephalus we identified. For M. cephalus four behavioral patterns could be identified with differential use of marine, estuarine and freshwater environments; while for M. liza only three could be recognized. M. cephalus showed at least two fish stocks in the Valencian Mediterranean coast, whereas M. liza did not show michochemical differences that allowed recognizing more than one fish stock in the Southwestern Atlantic coast.In this context, otoliths turned out to be an important complementary tool to study the biology and ecology of mugilids, recognizing movements, habitat use and stock identification; allowing to generate proper management strategies for the species and the preferred used areas.Aplicació dels otòlits a l'estudi de la interconectividad d'estocs pesquers de mugílids de zones costaneres de la província de Buenos Aires, Argentina i de la costa Valenciana, Espanya. Resum L'objectiu d'aquesta tesi va ser determinar els estocs de mugílids presents en la costa Atlàntica sud-occidental (25 • 30'S -40 • 32'S) i en la costa Mediterrània de la Comunitat Valenciana (38 • 08'N -40 • 38'N) i la seua interconectividad, utilitzant la morfologia, morfometria i composició química dels otòlits sagitta (cossos policristal·lins compostos per carbonat de calci allotjats a l'oïda interna del peix). Es va analitzar la morfologia del sagita de 9 espècies de mugílids, la qual cosa va permetre diferenciar-los i generar una clau d'identificació específica. Així mateix, es van proposar patrons morfològics de l'otòlit a nivell de família i gènere. Atès que els otòlits varien durant el desenvolupament dels peixos, es van identificar patrons ontogenètics en relació amb el creixement del peix, per a Mugil liza, Mugil cephalus i Liza ramada, podent descriure's les re...

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Is otolith microchemistry (Sr: Ca and Ba:Ca ratios) useful to identify Mugil curema populations in the southeastern Caribbean Sea?

Cited by 15 publications

References 32 publications

Otolith shape discrimination of Liza ramada (Actinopterygii: Mugiliformes: Mugilidae) from marine and estuarine populations in Tunisia

Otolith shape discrimination of Liza ramada (Actinopterygii: Mugiliformes: Mugilidae) from marine and estuarine populations in Tunisia

Otolith morphometry and microchemistry as habitat markers for juvenileMugil cephalusLinnaeus 1758 in nursery grounds in the Valencian community, Spain

Aplicación de los otolitos en el estudio de la interconectividad de stocks pesqueros de mugílidos de zonas costeras de la provincia de Buenos Aires, Argentina y de la costa Valenciana, España.

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