Effects of Temperature and pH on the Egg Production and Hatching Success of a Common Korean Copepod

Lee, Eun Hye; Choi, Seo Yeol; Seo, Min Ho; Lee, Seok-Ju; Soh, Ho Young

doi:10.3390/d12100372

Cited by 12 publications

(5 citation statements)

References 54 publications

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“…Studies that measure hatch rate in brooders were limited to crustaceans and molluscs, as hatch rate was not reported for brooding species in any other taxa. Several brooding crustacean species held at low pH were found to have differences in fecundity, hatch success, or number of offspring Mayor et al, 2007;Findlay et al, 2009;Zhang et al, 2011;Vehmaa et al, 2012;Weydmann et al, 2012;Kita et al, 2013;Long et al, 2013;McConville et al, 2013;Zervoudaki et al, 2013;Cripps et al, 2014;Cao et al, 2015;Swiney et al, 2015;Thor and Dupont, 2015;Choi et al, 2016;Miller et al, 2016;Vehmaa et al, 2016;Borges et al, 2018a;Cardoso et al, 2018;Gravinese, 2018;Pansch et al, 2018;Thor et al, 2018;Lee et al, 2020). One study in copepods found that OA reduced the number of brooding females (Lee et al, 2019).…”

Section: Fecundity and Reproductive Outputmentioning

confidence: 99%

Ocean acidification does not overlook sex: Review of understudied effects and implications of low pH on marine invertebrate sexual reproduction

Padilla‐Gamiño

Alma²,

Spencer³

et al. 2022

Front. Mar. Sci.

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Sexual reproduction is a fundamental process essential for species persistence, evolution, and diversity. However, unprecedented oceanographic shifts due to climate change can impact physiological processes, with important implications for sexual reproduction. Identifying bottlenecks and vulnerable stages in reproductive cycles will enable better prediction of the organism, population, community, and global-level consequences of ocean change. This article reviews how ocean acidification impacts sexual reproductive processes in marine invertebrates and highlights current research gaps. We focus on five economically and ecologically important taxonomic groups: cnidarians, crustaceans, echinoderms, molluscs and ascidians. We discuss the spatial and temporal variability of experimental designs, identify trends of performance in acidified conditions in the context of early reproductive traits (gametogenesis, fertilization, and reproductive resource allocation), and provide a quantitative meta-analysis of the published literature to assess the effects of low pH on fertilization rates across taxa. A total of 129 published studies investigated the effects of ocean acidification on 122 species in selected taxa. The impact of ocean acidification is dependent on taxa, the specific reproductive process examined, and study location. Our meta-analysis reveals that fertilization rate decreases as pH decreases, but effects are taxa-specific. Echinoderm fertilization appears more sensitive than molluscs to pH changes, and while data are limited, fertilization in cnidarians may be the most sensitive. Studies with echinoderms and bivalve molluscs are prevalent, while crustaceans and cephalopods are among the least studied species even though they constitute some of the largest fisheries worldwide. This lack of information has important implications for commercial aquaculture, wild fisheries, and conservation and restoration of wild populations. We recommend that studies expose organisms to different ocean acidification levels during the entire gametogenic cycle, and not only during the final stages before gametes or larvae are released. We argue for increased focus on fundamental reproductive processes and associated molecular mechanisms that may be vulnerable to shifts in ocean chemistry. Our recommendations for future research will allow for a better understanding of how reproduction in invertebrates will be affected in the context of a rapidly changing environment.

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Section: Fecundity and Reproductive Outputmentioning

confidence: 99%

Ocean acidification does not overlook sex: Review of understudied effects and implications of low pH on marine invertebrate sexual reproduction

Padilla‐Gamiño

Alma²,

Spencer³

et al. 2022

Front. Mar. Sci.

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“…Acartia ohtsukai, which occurs in the estuarine and coastal waters of Korea, China, Vietnam, and Japan (Razouls et al, 2005(Razouls et al, -2020, is also an excellent candidate live prey species for aquaculture, because it is found in high densities owing to its adaptability to rapid changes in temperature and salinity (Choi et al, 2019;Lee et al, 2020). A. ohtsukai dominates in summer and autumn in Yeoja Bay, comprising more than 60% of the zooplankton community in the inner bays in September (Lee, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effects of Temperature and Salinity on Egg Production, Hatching, and Mortality Rates in Acartia ohtsukai (Copepoda, Calanoida)

et al. 2021

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The calanoid copepod Acartia ohtsukai predominates the estuarine and coastal waters of East Asia during summer. Its occurrence characteristics confer it with good potential as live prey for fish larvae through mass culture. To investigate the effect of temperature and salinity combinations on its egg production rate (EPR), hatching success (HS), and mortality rate, experiments were undertaken and repeated three times for combinations of five temperatures (10, 15, 20, 25, and 30°C) and seven salinities (10, 15, 20, 25, 27, 30, and 33 psu). EPR and HS were highest at temperatures of 25 and 30°C, respectively, with a salinity of 27 psu. Mortality rate was highest at 10°C in almost all salinity gradients, whereas it was lower at water temperature and salinity ranges of 20–30°C and 20–30 psu, respectively. These findings indicate that A. ohtsukai can inhabit wide ranges of water temperatures and salinities, and that the optimized condition for mass culture is a combination of water temperature of 25°C and salinity of 27 psu.

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“…Further, some traits, such as egg size, egg volume and the number of eggs per egg sac, did not provide significant information at the assemblage level. However, they could be useful indicators of population functionality when utilised at the species level [73]. Further, our study is observational and does not involve experimental manipulations.…”

Section: Discussionmentioning

confidence: 99%

Variation in Copepod Morphological and Life History Traits along a Vertical Gradient of Freshwater Habitats

Tabilio Di Camillo,

Galassi,

Fiasca

et al. 2023

Environments

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Understanding trait selection factors is vital for decoding the processes shaping species’ assemblages. However, trait-based studies in freshwater crustacean copepod assemblages are scarce, especially in groundwater environments. We explored how environmental filtering influences functional traits in copepod assemblages across four freshwater habitats (an alluvial aquifer, a hyporheic zone, a stream benthic zone and a lake littoral) along a depth gradient. Each habitat had distinct environmental templates based on light, temperature and dissolved oxygen. We analysed 4898 individuals from 43 copepod species and examined 12 morphological and life history traits. The results revealed significant differences in copepod traits among habitats, notably in ovigerous female biomass, egg biomass and ovigerous female percentages. Furthermore, despite some statistical uncertainty, notable differences were also observed in the number of juveniles, male-to-female abundance ratios and overall biomass. No significant differences were observed in juvenile biomass, egg characteristics, body size dimorphism or juvenile-to-adult ratios among habitats. The trait variations offer insights into copepod-mediated ecosystem services, particularly carbon recycling. To gain a deeper understanding of copepod adaptations to environmental features and anthropogenic changes, future research should consider additional functional traits, such as locomotion and feeding habits.

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Effects of Temperature and pH on the Egg Production and Hatching Success of a Common Korean Copepod

Cited by 12 publications

References 54 publications

Ocean acidification does not overlook sex: Review of understudied effects and implications of low pH on marine invertebrate sexual reproduction

Ocean acidification does not overlook sex: Review of understudied effects and implications of low pH on marine invertebrate sexual reproduction

Effects of Temperature and Salinity on Egg Production, Hatching, and Mortality Rates in Acartia ohtsukai (Copepoda, Calanoida)

Variation in Copepod Morphological and Life History Traits along a Vertical Gradient of Freshwater Habitats

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