Spatio-temporal patterns of genetic variation of the silverside Odontesthes regia in the highly productive Humboldt Current System

Deville, Diego; Sánchez, Gustavo; Barahona, Sergio Pérez; Yamashiro, Carmen; Oré-Chávez, Daniel; Bazán, Roger Quiroz; Umino, Tetsuya

doi:10.1016/j.fishres.2021.106127

Cited by 4 publications

(2 citation statements)

References 65 publications

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“…However, various studies have reported results contrary to these predictions, showing that life history cannot always predict genetic stability of a species over time (Hedgecock, 1994;Toonen & Grosberg, 2011). As expected, a higher level of genetic structure has generally been reported for low dispersers when compared with species that have propagules surviving for a long period of time in the water column (Deville et al, 2021;Haye et al, 2021;Jueterbock et al, 2018;Kelly & Palumbi, 2010;Lee & Boulding, 2009;Quintero-Galvis et al, 2020;Rojas-Hernandez et al, 2016). Yet, genetic structure and diversity have been shown to be remarkably stable in algae with very low dispersal capacity and small isolated populations, which could be attributed to population dynamics characterized by high survival and low recruitment rates (Engel et al, 2001) and the recruitment of mostly locally produced spores (Engel et al, 2004).…”

Section: Introductionmentioning

confidence: 90%

A temporal and spatial study of genetic structure in four species of bladed Bangiales (Rhodophyta) from the southeastern Pacific coast of Chile

Cid‐Alda

Montecinos

Guillemin

2023

Journal of Phycology

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The coastline is a heterogeneous and highly dynamic environment influenced by abiotic and biotic variables affecting the temporal stability of genetic diversity and structure of marine organisms. The aim of this study was to determine how much the genetic structure of four species of marine Bangiales vary in time and space. Partial sequences of the cytochrome oxidase I (COI) gene obtained from two Pyropia (Py. sp. CHJ and Py. orbicularis) and two Porphyra (P. mumfordii and P. sp. FIH) species were used to compare the effect of the 40° S/41° S biogeographic break (spatial‐regional scale) and the one of the Valdivia River discharges (spatial‐local scale) and determine their temporal stability. Four seasonal samplings were taken during 1 year at five sites, one site located in Melinka (Magallanes province) and four sites along the coast of Valdivia (Intermediate area), on both sides of the river mouth. Results showed a strong genetic spatial structure at regional scale (ΦST > 0.4) in Py. sp. CHJ, Py. orbicularis, and P. mumfordii, congruent with the 41° S/42° S biogeographic break. A potential barrier to gene flow, related to the Valdivia River discharge, was detected only in P. mumfordii. In P. sp. FIH, spatial genetic structure was not detected at any scale. The genetic structure of all four species is stable throughout the year. The potential effect of main currents and river discharge in limiting the transport of Bangiales spores are discussed. We propose that both a restricted propagule dispersal and the formation potential for persistent banks of microscopic stages could lead to a temporally stable spatial partitioning of genetic variation in bladed Bangiales.

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Section: Introductionmentioning

confidence: 90%

A temporal and spatial study of genetic structure in four species of bladed Bangiales (Rhodophyta) from the southeastern Pacific coast of Chile

Cid‐Alda

Montecinos

Guillemin

2023

Journal of Phycology

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“…Thirteen species of silversides have been described in Chile, with representatives of the subgenus Austromenidia (including Odontesthes regia) being the most abundant in the marine ecosystem (Dyer and Gosztonyi 1999). Sea silverside has high genetic diversity and at least two co-distributed genetic groups (Deville et al 2021). The species can inhabit diverse marine environments, such as estuaries, beaches, sandy bottoms, and moves in small schools near the coast, between 0 and 50 m depth (Cifuentes et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A data-limited approach to determine the status of the artisanal fishery of sea silverside in southern Chile

et al. 2022

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Artisanal fisheries are essential, but for most the status of the stock supporting the fishing activity remains unknown due to lack of data and difficult access to sampling. For example, the artisanal fishery of sea silverside Odontesthes (Austromenidia) regia, in the Los Lagos administrative region of Chile, requires a data-limited approach to determine its status because the fishery administration has not invested in its monitoring. The approach consisted of estimating the spawning potential ratio (SPR) from length-frequency data collected in 2019 using length-based spawning potential ratio (LBSPR) and biological reference points using the only-catch optimized method (OCOM) to catch data covering from 1960 to 2020. In addition, five age-structured sea silverside populations were simulated considering uncertainty in recruitment and utilizing life-history parameters estimated by FishLife. According to LBSPR, the SPR was 0.58 (95% confidence intervals: 0.5-0.7), suggesting a fully exploited fishery status. The OCOM result was inconsistent with the life-history parameters and was discarded as a valid sea silverside stock assessment. The age-structured population simulations indicated evidence of a reduction in the spawning stock biomass close to 75% of the unexploited condition in 1960. Thus, the underexploited status reached a probability close to 49.4%, and the fully exploited status was 41.2%. The framework for a data-limited stock-assessment approach and results obtained here for the sea silverside are starting essential steps that may be emulated in other artisanal data-limited fisheries.

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Living Along Distribution Margins: Differences in the Body and Biochemistry of Red Squat Lobster Morphotypes (Grimothea monodon) from the Humboldt Current System

Quispe-Machaca,

Zilleruelo,

Espinoza

et al. 2024

Fishes

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Grimothea monodon, an important fishery resource in the Humboldt Current marine ecosystem (HCE), present two contrasting morphotypes (PM, pelagic morphotype; BM, benthic morphotype). The fishery management of G. monodon is focused on understanding only fishery aspects that apply to a limited area, and there are currently no studies that evaluate the nutritional status of these morphotypes. This study evaluated the biological performance of PM and BM, analyzing the body (size, CL; weight, W; condition factor, Kn) and biochemical condition (glucose, G; proteins, P; lipids, L; fatty acids, FAs). The results reveal that G. monodon showed differences in CL and W between morphotypes, with higher values in BM than PM. The Kn was different between morphotypes with a tendency of isometric growth. In turn, the G contents were higher in PM than BM, while the contents of P, L, and FAs showed an opposite tendency, with higher contents recorded in BM than PM. Our findings suggest that the Kn should be included to strengthen the biological parameters and their relationships used in fishery management models. Differences in the biochemical condition between morphotypes can be considered potentially adaptive, in response to the combined effect of environmental factors that vary in the HCE.

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Spatio-temporal patterns of genetic variation of the silverside Odontesthes regia in the highly productive Humboldt Current System

Cited by 4 publications

References 65 publications

A temporal and spatial study of genetic structure in four species of bladed Bangiales (Rhodophyta) from the southeastern Pacific coast of Chile

A temporal and spatial study of genetic structure in four species of bladed Bangiales (Rhodophyta) from the southeastern Pacific coast of Chile

A data-limited approach to determine the status of the artisanal fishery of sea silverside in southern Chile

Living Along Distribution Margins: Differences in the Body and Biochemistry of Red Squat Lobster Morphotypes (Grimothea monodon) from the Humboldt Current System

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