Elasmobranch Responses to Experimental Warming, Acidification, and Oxygen Loss—A Meta-Analysis

Frontiers in Marine Science, Год журнала: 2021, Номер 8

Опубликована: Окт. 1, 2021

Despite the long evolutionary history of this group, challenges brought by Anthropocene have been inflicting an extensive pressure over sharks and their relatives. Overexploitation has driving a worldwide decline in elasmobranch populations, rapid environmental change, triggered anthropogenic activities, may further test group's resilience. In context, we searched literature for peer-reviewed studies featuring sustained (>24 h) controlled exposure species to warming, acidification, and/or deoxygenation: three most pressing symptoms change ocean. standardized comparative framework, conducted array mixed-model meta-analyses (based on 368 control-treatment contrasts from 53 studies) evaluate effects these factors combination as experimental treatments. We compared across different attributes (lineages, climates, lifestyles, reproductive modes, life stages) assessed direction impact comprehensive set biological responses (survival, development, growth, aerobic metabolism, anaerobic oxygen transport, feeding, behavior, acid-base status, thermal tolerance, hypoxia cell stress). Based present findings, warming appears influential factor, with clear directional effects, namely decreasing development time increasing tolerance. While influence was pervasive attributes, acidification appear be more context-specific, no perceivable trends apart necessary achieve balance. Meanwhile, despite its potential steep impacts, deoxygenation neglected data paucity ultimately precluding sound conclusions. Likewise, implementation multi-factor treatments mostly restricted approximately matching those warming. considerable progress recent years, research regarding drivers elasmobranchs lags behind other taxa, required disentangle many observed effects. Given current levels extinction risk quick pace global it is crucial that integrate knowledge accumulated through scientific approaches into holistic perspective better understand how group fare changing

Язык: Английский

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New insights into the migration patterns of the scalloped hammerhead shark Sphyrna lewini based on vertebral microchemistry

Marine Biology, Год журнала: 2020, Номер 167(5)

Опубликована: Апрель 8, 2020

Язык: Английский

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Ocean Acidification Influences Site Fidelity and Seagrass Habitat Use by an Herbivorous Fish

Опубликована: Янв. 1, 2025

Ocean acidification (OA), characterised by a change in seawater chemistry and concomitant decline pH due to the uptake of increased anthropogenic CO2, will profoundly shape marine ecosystems. CO2 can act negatively (as stressor for organisms with calcareous exoskeleton) or positively direct resource primary producers like macrophytes). Consequently, herbivores may indirectly take advantage OA counteracting negative effects living under high pCO2/low conditions. Here, we investigated how influence site fidelity, habitat use, trophic behaviour patterns Sarpa salpa, main herbivorous fish associated Posidonia oceanica meadows north-western Mediterranean Sea. We assessed if influences use S. salpa comparing natural tags such as otolith muscle at vents reference sites. did not find differences elemental composition among exposed different conditions (CO2 vent vs ambient sites). However, isotopic signal showed life stages (young sub-adults), following same trend both otoliths seawater-dissolved inorganic carbon signal. Finally, found higher nutritional value P. its epiphytes consequent increase their consumption compared This separation indicates that spent more time exploiting resources vents. Our findings shed new light on food web future scenarios.

Язык: Английский

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Brazilian Amazon Coast is an essential habitat for threatened and evolutionarily distinct sharks and rays

Marine Biology, Год журнала: 2025, Номер 172(2)

Опубликована: Янв. 31, 2025

Язык: Английский

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Vertebral elemental composition reveals ontogenetic changes in habitat use in a Northeast Atlantic mesopredator shark

Estuarine Coastal and Shelf Science, Год журнала: 2025, Номер unknown, С. 109255 - 109255

Опубликована: Март 1, 2025

Язык: Английский

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Acid-base adjustments and first evidence of denticle corrosion caused by ocean acidification conditions in a demersal shark species

Scientific Reports, Год журнала: 2019, Номер 9(1)

Опубликована: Дек. 19, 2019

Global ocean acidification is expected to chronically lower the pH 7.3 (>2200 µatm seawater pCO2) by year 2300. Acute hypercapnia already occurs along South African west and south coasts due upwelling- low-oxygen events, with increasing frequency. In present project we investigated impact of on endemic demersal shark species Haploblepharus edwardsii. Specifically, experimentally analysed acid-base regulation during acute chronic hypercapnia, effects growth rates denticle structure- composition. While H. edwardsii are physiologically well adapted observed, for first time, corrosion as a result exposure. We conclude that could increase turnover compromise hydrodynamics skin protection.

Язык: Английский

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In utero elemental tags in vertebrae of the scalloped hammerhead shark Sphyrna lewini reveal migration patterns of pregnant females

Scientific Reports, Год журнала: 2020, Номер 10(1)

Опубликована: Фев. 4, 2020

Abstract Vertebral microchemistry recently allowed to infer the migration patterns of scalloped hammerhead shark Sphyrna lewini in Mexican Pacific, however conclusions regarding movements reproductive females were hindered by small sample size. Considering that S. is a placental viviparous species, maternal supply nutrients embryos might influence their vertebral while utero and provide intrinsic markers pregnant female environmental histories. This hypothesis was tested before attempting through analyses elemental profiles quantified vertebrae coastal young-of-the-year (‘YOY’). Vertebrae obtained from sharks captured along Pacific coast 2016. using laser ablation inductively-coupled plasma mass spectrometry. Elemental signatures at edge consistent between each her demonstrating viability employing as tag gestation-related Analyses YOY Sr:Ba Pb:Ca suggested either (1) progressively migrated offshore quickly returning habitats term or (2) remained nearshore during complete gestation. endangered status , current management measures may be insufficient for sustainable population particularly susceptible fisheries when remaining entering prior pupping.

Язык: Английский

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Habitat Use Patterns and Identification of Essential Habitat for an Endangered Coastal Shark With Vertebrae Microchemistry: The Case Study of Carcharhinus porosus

Frontiers in Marine Science, Год журнала: 2020, Номер 7

Опубликована: Март 6, 2020

Sharks are among the most endangered and data poor vertebrates in world. The lack of information regarding their habitat use is especially concerning since these crucial for establishment priority areas species conservation. Investigating trace elements present shark vertebrae has become an interesting tool to analyze over individuals' lifetimes. Therefore, we applied microchemistry investigate Carcharhinus porosus Brazil's Northern Coast (BNC). We also discuss methodological issues that must be addressed future make studies with elasmobranchs at low latitudes more robust. Vertebrae from seventeen individuals sampled 1980s (n=8), 2017 2018 (n=9) were evaluated through laser ablation inductively coupled plasma mass spectrometry. analyzed five known reflect environmental characteristics (Ba, Ca, Mg, Mn, Sr) by sex, seasons, decades capture, life stages. Since Ca abundant element vertebrae, calculated element:Ca ratios employed proportions all statistical analysis. used fisheries-independent catch test if BNC a nursery area C. porosus. found significant differences concentrations between sexes both multi single-element analysis, while differed only multi-element Sr:Ca. Furthermore, seasons Mg:Ca Ba:Ca ratios. did not find Neonate signatures yielded three major groups, thus suggesting least birthing grounds area. Despite occurrence sizes, adults show distinct pattern. Our results point towards hypothesis essential this its whole cycle occurs critical reinforce strictly tropical should effects metabolism, species' growth rate, validation other capable demonstrating fine-scale changes reduce inherent noise studies.

Язык: Английский

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Habitat use and nursery evaluation for the longnose stingray Hypanus guttatus (Bloch & Schneider, 1801) using vertebral microchemistry

Journal of Fish Biology, Год журнала: 2021, Номер 99(5), С. 1538 - 1549

Опубликована: Июль 22, 2021

ABSTRACT Here, we use vertebral microchemistry to investigate the habitat patterns of longnose stingray Hypanus guttatus in northern and northeastern regions Brazil, evaluate existence potential nurseries species. Samples were collected Maranhão, Rio Grande do Norte Pernambuco states between 2008 2019. Trace element concentrations Ba:Ca, Mg:Ca, Mn:Ca Sr:Ca vertebrae determined through laser ablation inductively coupled plasma mass spectrometry. We used one‐step permutational ANOVAs multi single‐element differences element:Ca ratios among life stages sexes across within sites. Element signatures differed all sites for both single multi‐element settings. However, there few sites, except Maranhão state, Norte, Ba:Ca Norte. Furthermore, analyses locations significant highlight strong by also performed a nonmetric multidimensional scaling analysis, which demonstrated samples from other two By analysing lifetime transects each sample, observed that was little variation Therefore, argue likely does not display extensive shifts fulfils much its cycle area. Finally, obtained no evidence any site suggest this is pattern species distribution. Future studies investigating with larger specimens (disc width > 90 cm, >15 years) are needed better understand size ranges.

Язык: Английский

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Introduction to the 6th International Otolith Symposium

Marine and Freshwater Research, Год журнала: 2019, Номер 70(12), С. i - i

Опубликована: Янв. 1, 2019

Язык: Английский

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