Ecomorphological patterns of the lapilli of Paranoplatense Siluriforms (South America)

Volpedo, Alejandra V.; Fuchs, Daniela

doi:10.1016/j.fishres.2009.11.007

Cited by 30 publications

(30 citation statements)

References 32 publications

(33 reference statements)

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“…The shape of the otolith may also reflect its physiological function in hearing and balance, and such variation can have an adaptive significance. Ecomorphological studies have related intra-and inter-specific variation in otolith shape to swimming performance and feeding behaviour (Kishida et al 2011), trophic niche (Lombarte et al 2010) and habitat preferences (Volpedo et al 2008;Volpedo and Fuchs 2010). For example, a long elongated otolith with a welldeveloped rostrum is characteristic of pelagic species, whereas benthic ecotypes typically have rounder wider otoliths (Volpedo and Echeverria 2003).…”

Section: Discussionmentioning

confidence: 99%

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Brophy

Haynes

Arrizabalaga

et al. 2016

Mar. Freshwater Res.

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Abstract. Two stocks of bluefin tuna (Thunnus thynnus) inhabit the north Atlantic; the western and eastern stocks spawn in the Gulf of Mexico and the Mediterranean Sea respectively. Trans-Atlantic movements occur outside spawning time whereas natal homing maintains stock structure. Commercial fisheries may exploit a mixed assemblage of both stocks. The incorporation of mixing rates into stock assessment is precluded by uncertainties surrounding stock discrimination. Otolith shape descriptors were used to characterise western and eastern stocks of Atlantic bluefin tuna in the present study and to estimate stock composition in catches of unknown origin. Otolith shape varied with length and between locations and years. Within a restricted size range (200-297-cm fork length (FL)) the two stocks were distinguished with an accuracy of 83%. Bayesian stock mixture analysis indicated that samples from the east Atlantic and Mediterranean were predominantly of eastern origin. The proportion assigned to the eastern stock showed slight spatial variation; however, overlapping 95% credible intervals indicated no significant difference (200-297 cm FL: central Atlantic, 73-100%; Straits of Gibraltar, 73-100%; Morocco, 50-99%; Portugal 64-100%). Otolith shape could be used in combination with other population markers to improve the accuracy of mixing rate estimates for Atlantic bluefin tuna.

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Section: Discussionmentioning

confidence: 99%

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Brophy

Haynes

Arrizabalaga

et al. 2016

Mar. Freshwater Res.

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“…In addition to the environmental parameters (Aguirre and Lombarte 1999, Torres et al 2000, Volpedo and Echeverría 2000, Gauldie and Crampton 2002, Volpedo and Fuchs 2010, also other factors have effect on the otoliths, they include ontogenetic factors (Tombari et al 2005, Gonzalez Naya et al 2012, physiological factors as the hearing capabilities associated with specialization in acoustic communication (Popper and Fay 1993, Paxton 2000, Lombarte and Cruz 2007, and the phylogeny (Nolf and Tyler 2006). All of those could affect the morphology, the morphometry, and the microstructure of sagittae ).…”

Section: Discussionmentioning

confidence: 99%

Stock discrimination of two insular populations of Diplodus annularis (Actinopterygii: Perciformes: Sparidae) along the coast of Tunisia by analysis of otolith shape

Trojette

Faleh

Fatnassi

et al. 2015

Acta Ichthyol. Piscat.

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Background. The annular seabream, Diplodus annularis (Linnaeus, 1758), is the most common sparid fi sh in the Mediterranean Sea. This species is widespread in Tunisia. Despite their economic importance, due to their excellent white and delicate fl esh (demersal fi sh) and their signifi cant size, few studies have hitherto focused on stock discrimination and on the fi sheries management. The goal of this research was to evaluate the stock structure of D. annularis for two Tunisian insular populations based on the otolith shape, using different statistical approaches. Materials and methods. The specimens of Diplodus annularis were collected during fi ve months ranging from May through September 2014 at two sites: Djerba and Kerkennah. In total, 120 fi sh were collected from the two sites: 60 specimens of each population (30 males and 30 females) and were included in different statistical analyses. The Fourier coeffi cients were determined to evaluate the degree of similarity in the otoliths and detect the reciprocal variability. Results. By comparing the two studied populations, we revealed statistical signifi cant differences, an asymmetry (left-right), of otoliths (P < 0.05). In the same population, symmetry (left-right) was detected for the males, females of Kerkennah, and females of Djerba. However, an asymmetry was detected only for the males of Djerba. Also, sexual dimorphism was observed only for the Djerba population. Conclusion. The comparison of the otolith morphology of the two populations showed a clear difference in shape and a left-right asymmetry of otoliths. This asymmetry indicates that the two populations belong to different stock of fi sh. The stocks characterization is considered as an important tool for fi sheries management. Further studies are necessary to determine the origin of the otolith shape differences and whether they are related only to environmental conditions or a genetic basis may also be responsible.

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“…Other approaches such as the analysis of otolith morphology and morphometry have been widely used to differentiate fish stocks (Longmore 2010, Cañás et al 2012, Keating et al 2014, and even to identify existing species (Tuset et al 2013, Zhuang et al 2014 or fossilized fish (Reichenbacher et al 2009, Reichenbacher andReichard 2014); however, only a few studies relate morphometric variables to different environments or ecomorphological patterns (Nelson et al 1994;Volpedo and Fuchs 2010;Avigliano et al 2012Avigliano et al , 2014.…”

Section: Discussionmentioning

confidence: 99%

Otolith Sr:Ca ratio and morphometry as indicators of habitat of a euryhaline species: The case of the silverside Odontesthes bonariensis

Avigliano

Villatarco²,

Volpedo

2015

Cienc. Mar.

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ABSTRACT. The silverside Odontesthes bonariensis is a euryhaline species native of South America and represents a very important fishing resource for the Plata Basin (Argentina and Uruguay). This study compares the Sr:Ca ratio of water as well as the Sr:Ca ratio and morphometry of the sagittal otolith of the silverside present in different environments (one salt lake, two freshwater dams, one lagoon, and one estuary) in order to evaluate the use of these variables as markers of habitat. The pattern of the Sr:Ca ratio in the water agrees with the one found in the otoliths, showing a positive relationship with the conductivity of the water. Univariate and multivariate analyses of variance indicated significant differences (P < 0.05) among the localities studied for the morphometric indices. The discriminant function analysis provided a high percentage of correctly classified individuals for the saltwater environment (100%) and the lentic water bodies and estuary (60-80%), circularity and form factor being the most relevant morphometric variables. These results indicate that the Sr:Ca ratio and otolith morphometry are good markers of habitat for this important resource.Key words: morphometry, Sr:Ca, otolith, Odontesthes bonariensis, Argentina. RESUMEN. El pejerreyOdontesthes bonariensis es una especie eurihalina nativa de Sudamérica y representa un importante recurso pesquero para la cuenca del Plata (Argentina y Uruguay). En este estudio se comparó la relación Sr:Ca del agua y la relación Sr.:Ca y morfometría de los otolitos sagittae de pejerreyes presentes en diferentes ambientes (un lago de agua salada, dos embalses de agua dulce, una laguna y un estuario) con el objetivo de evaluar el uso de estas variables como marcadores de hábitat. El patrón de la relación Sr:Ca del agua concuerda con la hallada en los otolitos, mostrando una relación positiva con la conductividad del agua. Los análisis univariados y multivariados indicaron diferencias (P < 0.05) entre las localidades estudiadas para los índices morfométricos. El análisis discriminante mostró un elevado porcentaje de individuos correctamente clasificados para el ambiente de agua salada (100%), los cuerpos de agua lenticos y el estuario (60-80%), siendo la circularidad y el factor de forma los índices morfométricos de mayor relevancia para esta clasificación. Estos resultados indican que la relación Sr:Ca y la morfometría del otolito son buenos marcadores de hábitat para este importante recurso.

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Ecomorphological patterns of the lapilli of Paranoplatense Siluriforms (South America)

Cited by 30 publications

References 32 publications

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Stock discrimination of two insular populations of Diplodus annularis (Actinopterygii: Perciformes: Sparidae) along the coast of Tunisia by analysis of otolith shape

Otolith Sr:Ca ratio and morphometry as indicators of habitat of a euryhaline species: The case of the silverside Odontesthes bonariensis

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