Otolith shape analysis of the Brazilian silverside in two northeastern Brazilian estuaries with distinct salinity ranges

Clark, Fernando José König; Lima, Caroline Stefani da Silva; Pessanha, André Luiz Machado

doi:10.1016/j.fishres.2021.106094

Cited by 5 publications

(4 citation statements)

References 59 publications

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“…These effects potentially cascade to several otolith features due to the variable formation of fish otoliths. It was also observed that fish exposed to more saline waters have longer [74], heavier otoliths with higher isotopic carbon and oxygen concentrations [75], and greater and wider otolith growth and increment depositions [76,77]. These may be attributed to the D. kurroides in the Sibuyan Sea having longer (more elliptic), larger, and heavier otoliths.…”

Section: Discussionmentioning

confidence: 89%

Distinct Stocks of the Redtail Scad Decapterus kurroides Bleeker, 1855 (Perciformes: Carangidae) from the Northern Sulu and Southern Sibuyan Seas, Philippines Revealed from Otolith Morphometry and Shape Analysis

Barnuevo

Morales

Calizo

et al. 2022

Fishes

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A recent study was performed to assess the morphometric variation of otoliths of the Decapterus kurroides collected in the northern Sulu and southern Sibuyan seas in delineating fish stocks. Seven of the otolith morphometric descriptors (otolith length, OL; otolith height, OH; otolith weight OW; otolith area, OA; otolith perimeter, OP; ellipticity, EL; and aspect ratio, AR) demonstrated a significant positive correlation with fish length and six (rectangularity, RE; squareness, SQ; roundness, RO; circularity, CI; compactness, CO; and form factor, FF) demonstrated a significant negative correlation. In terms of intraspecific comparisons, almost all the otolith morphometric descriptors were significantly different between the two sites (except RE and OH). Further, principal component (PC) analysis showed that direct otolith morphometric descriptors such as OL, OH, OW, OA, and OP explained 61.71% of the differences (PC1). In contrast, derived otolith descriptors such as EL, AR, and CO explained 22.00% of the variations (PC2) for a total of 83.71% explained variations with the eight otolith morphometric descriptors. Statistics reveal that D. kurroides from the Sibuyan Sea have significantly larger, heavier, and more elliptical otoliths than those from the Sulu Sea. Results suggested that the D. kurroides from Sulu and Sibuyan seas are two different phenotypic stocks. Further studies such as otolith microchemistry, genetics, other life history-based studies, and present exploitation levels should be carried out to supplement the results of this study to fully establish the D. kurroides stock structures within Philippine waters.

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Section: Discussionmentioning

confidence: 89%

Distinct Stocks of the Redtail Scad Decapterus kurroides Bleeker, 1855 (Perciformes: Carangidae) from the Northern Sulu and Southern Sibuyan Seas, Philippines Revealed from Otolith Morphometry and Shape Analysis

Barnuevo

Morales

Calizo

et al. 2022

Fishes

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“…However, it is now realized that it does not necessarily reflect genetic differences (e.g., Stransky, 2005; Vignon & Morat, 2010). Several studies suggest that while genetics constrain the overall shape of the otolith itself, environmental conditions such as food availability, depth, water temperature, salinity, substrate type, and exposure to environmental contaminants alter the rates of somatic and otolith growth, which in turn may affect otolith outline (e.g., Cardinale et al, 2004; Clark et al, 2021; Di Franco et al, 2019; Gagliano & McCormick, 2004; Hong et al, 2021; Lombarte & Lleonart, 1993; Oozeki & Watanabe, 2000; Schulz‐Mirbach et al, 2008; Vignon, 2018). The other qualitative characters, including coloration that has high intraspecific variability in these species (Figure 12), cannot distinguish between P. iranicus and P. patimari . PCA and DFA plots for the meristic and morphometric data, however, showed a clear separation of the two main subclades corresponding to P. iranicus and P. patimari (Hg1 + Hg2 + Hg3), suggesting the presence of significant morphological variation meriting formal taxonomic recognition.…”

Section: Discussionmentioning

confidence: 99%

Section: Species Diversity and Distributionsmentioning

confidence: 99%

An integrative insight into the diversity, distribution, and biogeography of the freshwater endemic clade of the Ponticola syrman group (Teleostei: Gobiidae) in the Caucasus biodiversity hotspot

Zarei

Esmaeili

Sadeghi

et al. 2022

Ecology and Evolution

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Freshwater habitats of the Caucasus biodiversity hotspot represent a center of endemism for the gobiid genus Ponticola Iljin, 1927. Hitherto, large‐scale molecular studies, owing to restricted taxon and geographical sampling, have failed to give an elaborate picture of diversity and evolutionary history of these species. Here, to contribute to filling this gap, we assessed taxonomic diversity, phylogeography and evolutionary history for the south Caspian populations of Ponticola presently classified as P. iranicus and P. patimari, using an integrative taxonomic approach comprising an entire geographic range sampling, and analyses of mitochondrial DNA haplotypes, the head lateral line system, otolith shape, and meristic and morphometric variation. All freshwater samples of the P. syrman group belong to a monophyletic clade with two main subclades: a small subclade confined to the upper Sefidroud sub‐basin including the type locality of P. iranicus and a large subclade with three geographically constrained haplogroups (Hg1, Hg2, and Hg3), comprising the rest of the distribution. Hg1 showed an eastern distribution including the type locality of P. patimari, while Hg2 and Hg3 are sister groups with central and western‐central distributions, respectively. The freshwater clade diverged from P. syrman during the Tyurkyanian low stand (~150 m b.s.l. lasting ~0.1 Myr), while the divergence of P. iranicus and P. patimari and radiations within P. patimari took place during the Bakunian high stand (up to 50 m a.s.l. lasting ~378–480 kya). Species delimitation analyses indicated two distinct species, corresponding to each main subclade. Although the otolith shape and lateral line analyses did not reflect with phylogeographic pattern, PCA and DFA plots of meristic and morphometric data showed a clear separation of the two major subclades corresponding to P. iranicus and P. patimari, suggesting the presence of significant morphological variation meriting formal taxonomic recognition. Overall, our findings (i) reveal the presence of two freshwater endemic species in the P. syrman group, and pending further investigation, hypothesize the presence of a third cryptic species; (ii) revise and document a narrow distributional range and low diversity for P. iranicus, in contrast to a wider distributional range and high diversity for P. patimari; (iii) suggest that the climatic oscillations of the Pleistocene were associated with the cladogenesis within the P. syrman group; and (iv) allowed for the recognition of conservation units and proposition of management measures.

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“…In vitro experiments are generally required, together with studies on otolith morphology. Furthermore, the comparison of the otoliths of different species and their populations are essential for improving our knowledge of these differences and our ability to detect them [1,47,57,65,66].…”

Section: Discussionmentioning

confidence: 99%

Morphometric Analyses of Phenotypic Plasticity in Habitat Use in Two Caspian Sea Mullets

Bakhshalizadeh

Abbasi

Liafuie

et al. 2022

JMSE

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To understand the functional meaning of morphological traits in the exploitation of natural resources, it is necessary to develop a quantitative, meaningful scheme for understanding ecophenotypes; this will facilitate management and conservation, which are the most pressing challenges in vulnerable aquatic environments. In this context, the management of cryptic and very similar species is more challenging, because of the difficulty of distinguishing them and determining their frequency in sympatry, even though they do not necessarily have the same ecologies. As such, in order to understand how morphological similarities are associated with their ecology, thirteen morphometric characteristics related to body landmark-based geometric morphometries, sagittal otolith morphology, and shape were examined in mature Chelon auratus and Chelon saliens, which were collected from the coastal waters of the southwest Caspian Sea between October 2020 and April 2021. Univariate and multivariate analysis of variance were conducted to evaluate the potential morphological differences between the species. The analyses highlight the morphological differences between C. auratus and C. saliens, and identify potentially helpful traits for using body and otolith shape for the interspecific distinction of these very similar species of Caspian mullet, which can reflect functional similarity and are an important component of community ecology.

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Otolith shape analysis of the Brazilian silverside in two northeastern Brazilian estuaries with distinct salinity ranges

Cited by 5 publications

References 59 publications

Distinct Stocks of the Redtail Scad Decapterus kurroides Bleeker, 1855 (Perciformes: Carangidae) from the Northern Sulu and Southern Sibuyan Seas, Philippines Revealed from Otolith Morphometry and Shape Analysis

Distinct Stocks of the Redtail Scad Decapterus kurroides Bleeker, 1855 (Perciformes: Carangidae) from the Northern Sulu and Southern Sibuyan Seas, Philippines Revealed from Otolith Morphometry and Shape Analysis

An integrative insight into the diversity, distribution, and biogeography of the freshwater endemic clade of the Ponticola syrman group (Teleostei: Gobiidae) in the Caucasus biodiversity hotspot

Morphometric Analyses of Phenotypic Plasticity in Habitat Use in Two Caspian Sea Mullets

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