Otolith chemistry in stock delineation: A brief overview, current challenges and future prospects

Tanner, Susanne E.; Patrick, Ruth; Cabral, Henrique N.

doi:10.1016/j.fishres.2015.07.019

Cited by 102 publications

(74 citation statements)

References 97 publications

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“…genetic markers, tagging, life history parameters, parasites etc. ), otolith microchemistry has been recognised as a useful stock discriminant (Kerr and Campana 2014;Tanner et al 2016). These hard calcareous structures are found in the inner ear of vertebrates and are used for balance and hearing in teleost fish.…”

Section: Introductionmentioning

confidence: 99%

Otolith microchemistry: a useful tool for investigating stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean

Artetxe-Arrate

Fraile

Crook

et al. 2019

Mar. Freshwater Res.

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A better understanding of the stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean is needed to ensure the sustainable management of the fishery. In this study, carbon and oxygen stable isotopes (δ13C and δ18O) and trace elements (138Ba, 55Mn, 25Mg and 88Sr) were measured in otoliths of young-of-the-year (YOY) and age-1 yellowfin tuna collected from the Mozambique Channel and north-west Indian Ocean regions. Elemental profiles showed variation in Ba, Mg and Mn in YOY otolith composition, but only Mn profiles differed between regions. Differences in YOY near-core chemistry were used for natal-origin investigation. Ba, Mg and Mn were sufficiently different to discriminate individuals from the two regions, in contrast with carbon and oxygen stable isotopes. A linear discriminant analysis resulted in 80% correct classification of yellowfin tuna to their natal origin. Classification success increased to 91% using a random forest algorithm. Finally, a unique larval source was detected among age-1 yellowfin tuna. The signal of these fish resembled that of YOY from a north-west Indian Ocean origin, highlighting the importance of local production. The present study supports the use of otolith chemistry as a promising approach to analyse yellowfin stock structure in the Indian Ocean.

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Section: Introductionmentioning

confidence: 99%

Otolith microchemistry: a useful tool for investigating stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean

Artetxe-Arrate

Fraile

Crook

et al. 2019

Mar. Freshwater Res.

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“…However, increasing levels of nitrogen may also have deleterious effects on phytophagous insects through digestion costs (Stockhoff, 1991;Stevens et al, 2004;Bobbink et al, 2010;Turlure et al, 2013;Tanner et al, 2015). These costs may result from the higher cellulose content of nitrogen-rich plants (cellulose is generally not digested; Chown & Nicolson, 2004) and their higher concentration of toxic (nitrogen-containing) secondary metabolites (e.g.…”

Section: Introductionmentioning

confidence: 99%

Host plant nitrogen enrichment has both positive and negative effects on the larval growth of a specialist butterfly

Lebigre

Vanderbeken

Turlure

et al. 2018

Ecological Entomology

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1. The nitrogen limitation hypothesis posits that phytophagous insects benefit from nitrogen enrichment of their host plants through a reduction of the concentration of toxic compounds and an increase of free amino acids and proteins. However, species' response to nitrogen enrichment varies substantially and high nitrogen levels are associated with population decline, suggesting there are major costs to feeding on nitrogen‐rich host plants. 2. To test the hypothesis that larval growth performance is maximal at intermediate nitrogen enrichment, nitrogen levels were measured in 18 populations of the host plant of Lycaena helle, a specialist butterfly inhabiting nutrient‐poor wet meadows. The nitrogen content of host plants was then modified to mirror average natural nitrogen levels (C), highest field‐recorded levels (T1), and levels higher than those observed across our study populations (T2). 3. Caterpillars fed with T1 leaves had a greater maximum body mass than caterpillars of the C group because of their improved food assimilation during the early stages of their development. Caterpillars of C and T2 groups had similar growth patterns but high nitrogen content had detrimental effects, as caterpillars fed with T2 leaves had a slower ingestion rate than C and T1 groups. 4. Quantifying the fitness consequences of these changes in growth performance is necessary to fully understand the implications of nitrogen enrichment for L. helle (rapid growth may result in fitness costs). However, conservation plans for this emblematic glacial relict species should also consider the preservation of its host plant quality to ensure its persistence.

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“…The knowledge of the stock structure is a key component for the fisheries conservation and management strategies, because it establishes the basic work units in which the fishery can be evaluated and managed (Tanner et al ., ). Over recent decades, different methods have been utilised to delimit fish stocks such as genetics, meristics, body morphometry, parasites, artificial tags, morphometry and microchemistry of otoliths and scales (Cadrin et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Unravelling the stock structure of the Persian brown trout by otolith and scale shape

Rashidabadi

Abdoli

Tajbakhsh

et al. 2019

Journal of Fish Biology

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The simultaneous use of the scale and otolith morphometry was assessed as a potential tool for the identification of Persian brown trout Salmo trutta stocks of the Lar Lake and five rivers from Lar Basin, Iran. Fourier coefficients (FC) and circularity, rectangularity, roundness, ellipticity and form factor shape indices (SI) were calculated for otolith and scale. Several SIs were significantly different among sites for both structures. Permutational multivariate analysis of variance revealed significant differences between several pairwise comparisons for otolith and scale (FCs and indices separately). Discriminant analysis showed otolith FCs (cross-classification rates: 25-86%) and SI (20-45%) appear to be a relatively acceptable tool to discriminate between several locations. Comparatively, the scale morphometry showed lower discriminatory power (FC = 3-65%; SI = 15-34%), with the exception of SI for Elarm River (60%), Kamardasht River (56%) and Lar Lake (75%). Cross-classification rates improved up to 100% when discriminate analysis incorporating all variables for otolith and scale was performed. The results showed a potential segregation between some water bodies, suggesting that the otolith and scale morphometry could be a useful tool to delimit S. trutta populations in relatively close freshwater environments. K E Y W O R D Selliptic Fourier analysis, Lar National Park, morphometry, shape indices, stock identification

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Otolith chemistry in stock delineation: A brief overview, current challenges and future prospects

Cited by 102 publications

References 97 publications

Otolith microchemistry: a useful tool for investigating stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean

Otolith microchemistry: a useful tool for investigating stock structure of yellowfin tuna (Thunnus albacares) in the Indian Ocean

Host plant nitrogen enrichment has both positive and negative effects on the larval growth of a specialist butterfly

Unravelling the stock structure of the Persian brown trout by otolith and scale shape

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