Determination and precision of otolith growth zone estimates of Electrona antarctica in the Southern Kerguelen Plateau region in the Indian sector of the Southern Ocean

Zhu, Guoping; Duan, Mi; Lian, Wei; Trebilco, Rowan; Bestley, Sophie; Walters, Andrea

doi:10.1016/j.dsr2.2020.104778

Cited by 5 publications

(6 citation statements)

References 27 publications

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“…More recently, taking advantage of a large collection of E. antarctica specimens from the Southern Kerguelen Plateau, Zhu et al (2020) did a comprehensive analysis of age determination and provided a much longer maximum estimated lifespan of 9 years, which agrees with early work done by Linkowski (1987). A common research goal highlighted by several authors (Greely et al 1999;Zhu et al 2020) is the need of a validation study of the daily formation of otolith increments of E. antarctica such as: otolith markers (e.g. oxytetracycline incorporation) and periodic estimation of growth ring (sequential seasonal sampling).. Other Antarctic lanternfish species recently studied are: Gymnoscopelus braueri (Lönnberg, 1905) and Krefftichthys anderssoni (Lönnberg, 1905) (Saunders et al 2019).…”

Section: Teleost Fishsupporting

confidence: 81%

“…List of all identified species in the literature review arranged by taxa with data from their confirmed distribution, estimated maximum lifespan (MLSP), analytical techniques used in their study and relevant citations Species name Linkowski (1987), Hulley et al (1989), , Greely et al (1999), Duan et al (2020), Zhu et al (2018Zhu et al ( , 2020…”

Section: Tablementioning

confidence: 99%

“…However, age estimations of E. antarctica based on otolith ring counting have provided a varied range of estimations (see as well: Linkowski 1987;Hulley et al 1989), which was also discussed by Greely et al (1999). More recently, taking advantage of a large collection of E. antarctica specimens from the Southern Kerguelen Plateau, Zhu et al (2020) did a comprehensive analysis of age determination and provided a much longer maximum estimated lifespan of 9 years, which agrees with early work done by Linkowski (1987). A common research goal highlighted by several authors (Greely et al 1999;Zhu et al 2020) is the need of a validation study of the daily formation of otolith increments of E. antarctica such as: otolith markers (e.g.…”

Section: Teleost Fishmentioning

confidence: 99%

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Sclerochronology in the Southern Ocean

González

2021

Polar Biol

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This manuscript aims to provide a comprehensive review of the work done by Antarctic sclerochronology research across different taxa (arthropods, bivalves, brachiopods, bryozoans, cephalopods, hard and soft corals, gastropods, echinoderms and teleost fish), provide an analysis of current challenges in the discipline and start a discussion of what sclerochronology can offer for Antarctic research in future. The Southern Ocean ecosystem remains largely unstudied in part for its remoteness, extreme climate and strong seasonality. This lack of knowledge, some of it even on basic biological information, it is especially worrying due to ongoing climate-driven changes that the Southern Ocean ecosystem is experiencing. Lack of long-term in situ instrumental series has also being a detriment to understand long-term feedbacks between the physical environment and the ecosystem. Sclerochronology, the study of periodic accretional patterns in the hard body structures of living organisms, has contributed to a wide range of Antarctic research disciplines (e.g. paleoclimate reconstructions, population structure analysis, environmental proxies). This review highlights a disparity in research focus by taxa with some groups (e.g. bivalves, teleost fish) attracting most of the research attention, whereas other groups (e.g. gastropod) have attracted much little research attention or in some cases it is almost non-existent (e.g. echinoderms). Some of the long-lived species considered in this review have the potential to provide the much-needed high-resolution eco-environmental proxy data and play an important role in blue carbon storage in the Sothern Ocean. Another issue identified was the lack of cross-validation between analytical techniques. Graphic abstract

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Section: Teleost Fishsupporting

confidence: 81%

Section: Tablementioning

confidence: 99%

Section: Teleost Fishmentioning

confidence: 99%

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Sclerochronology in the Southern Ocean

González

2021

Polar Biol

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“…Each whole otolith was embedded in crystal bond and dried for 24–48 h. The mounted otoliths were ground by hand using a grinder (REMET LS2) with 600 and 734 grit waterproof sandpaper, followed by 1200 and 2500 grit, until the nucleus was clearly exposed. Finally, the exposed surface was polished using 0.3 μ m alumina powder, and age determined as described in Zhu et al (2018, 2020) (Fig. 5).…”

Section: Methodsmentioning

confidence: 99%

Otolith chemistry of Electrona antarctica suggests a potential population marker distinguishing the southern Kerguelen Plateau from the eastward‐flowing Antarctic Circumpolar Current

Duan

Ashford

Bestley

et al. 2020

Limnology & Oceanography

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Large submarine plateaus impede the eastward flow of the deep‐reaching Antarctic Circumpolar Current (ACC), and at the southern Kerguelen Plateau (SKP), the ACC flow is steered north through the Fawn Trough and south through the Princess Elizabeth Trough. During the Kerguelen Axis study, a regional‐scale ecosystem survey, oceanographic sampling showed the ACC water properties west of the SKP to be distinct from those over the SKP. Electrona antarctica, a dominant mesopelagic fish species, is associated with Circumpolar Deep Water transported by the ACC, and modified versions that occur over and downstream from the SKP including along the Antarctic continental slope. Here, otolith chemistry from samples of E. antarctica collected during the survey were used to test a biophysical hypothesis predicting structuring and movement between populations along zonal flow in the ACC. In chemistry deposited during early life in the otolith nuclei, the relationship between MgCa−1 and SrCa−1 showed complete separation between fish collected over the SKP and within the ACC proper, indicating population differentiation. Chemistry from the otolith edges, deposited during the period leading up to capture, showed significantly higher concentrations of MgCa−1 over the SKP, likely related to differences in feeding and reproduction. Fish with nucleus chemistry characteristic of the SKP were also found in samples caught further east, suggesting they were transported along the ACC downstream, and southward toward the Antarctic continent within the Australian–Antarctic Gyre.

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“…Such studies would also need to quantify the seasonal and interannual variation, food web subsidies (input of external energy: allochthonous production) and inter-food web connectivity (Murphy et al, 2007(Murphy et al, , 2013(Murphy et al, , 2016Treasure et al, 2019). Understanding of the lifehistories of many of the less-studied key mid-trophic level species is improving (e.g., Moteki et al, 2017;Queirós et al, 2018;Groeneveld et al, 2020;Kelly et al, 2020;Lin et al, 2020;Saunders et al, 2020;Zhu et al, 2020), however, for most species, quantitative understanding of lifecycles and population dynamics is still very limited (Constable et al, 2014(Constable et al, , 2017. Models of distribution and population processes of these species are required to provide inputs into food web models.…”

Section: Model Subject Reviewsmentioning

confidence: 99%