Effects of low oxygen concentrations on the hatching and viability of eggs of marine calanoid copepods

Lutz, R. V.; Marcus, Nancy H.; Chanton, Jeff

doi:10.1007/bf00349525

Cited by 73 publications

(41 citation statements)

References 8 publications

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“…In another study, eggs of A. tonsa stopped hatching at oxygen concentrations lower than 0.07 mL O 2 L −1 , but were not killed since they resumed hatching when transferred to normoxic seawater . Experimental results obtained by various authors (Lutz et al, 1992Roman et al, 1993;Marcus and Lutz, 1994;Marcus et al, 1997;Invidia et al, 2004) differ slightly regarding the concentration of oxygen that induces quiescence and the maximum survival times for eggs exposed to hypoxic concentrations. In general, maximum survival time of A. tonsa eggs under anoxic conditions ranged from 20 to >32 days, related to variations in the developmental stages of the eggs and differences in the genetic and/or environmental histories of the females producing the eggs Marcus et al, 1997;Invidia et al, 2004).…”

Section: Reproductionmentioning

confidence: 95%

Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

et al. 2010

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Abstract. Dissolved oxygen (DO) concentration in the water column is an environmental parameter that is crucial for the successful development of many pelagic organisms. Hypoxia tolerance and threshold values are species-and stagespecific and can vary enormously. While some fish species may suffer from oxygen values of less than 3 mL O 2 L −1 through impacted growth, development and behaviour, other organisms such as euphausiids may survive DO levels as low as 0.1 mL O 2 L −1 . A change in the average or the range of DO may have significant impacts on the survival of certain species and hence on the species composition in the ecosystem with consequent changes in trophic pathways and productivity.Evidence for the deleterious effects of oxygen depletion on pelagic species is scarce, particularly in terms of the effect of low oxygen on development, recruitment and patterns of migration and distribution. While planktonic organisms have to cope with variable DOs and exploit adaptive mechanisms, nektonic species may avoid areas of unfavourable DO and develop adapted migration strategies. Planktonic organisms may only be able to escape vertically, above or beneath the Oxygen Minimum Zone (OMZ). In shallow areas only the surface layer can serve as a refuge, but in deep waters many organisms have developed vertical migration strategies to use, pass through and cope with the OMZ.Correspondence to: W. Ekau (wekau@zmt-bremen.de) This paper elucidates the role of DO for different taxa in the pelagic realm and the consequences of low oxygen for foodweb structure and system productivity. We describe processes in two contrasting systems, the semi-enclosed Baltic Sea and the coastal upwelling system of the Benguela Current to demonstrate the consequences of increasing hypoxia on ecosystem functioning and services.

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Section: Reproductionmentioning

confidence: 95%

Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

et al. 2010

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“…Thus, these stress conditions, even if occurring at the water/sediment interface, may affect population dynamics of planktonic species. Many of the studies carried out on planktonic species (Uye & Fleminger 1976, Ambler 1985, Lutz et al 1992, Roman et al 1993, Stalder & Marcus 1997 have dealt with Acartia tonsa, a calanoid copepod very common in many lagoons and estuarine areas. Lutz et al (1994) reported that the eggs of this species stop hatching at oxygen concentrations lower than 3.12 × 10 -3 mmol l -1…”

Section: Introductionmentioning

confidence: 99%

Survival of the copepod Acartia tonsa following egg exposure to near anoxia and to sulfide at different pH values

Invidia¹,

Sei²,

Gorbi³

2004

Mar. Ecol. Prog. Ser.

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The impact of near anoxia (1.78 × 10 -3 to 3.56 × 10 -3 mmol O 2 l -1) and anoxia/sulfide (~1 mmol l -1 ) on hatching and viability of eggs of the planktonic copepod Acartia tonsa was evaluated. Since the equilibrium concentration of the sulfide species is influenced by pH and the different species have different capacities to enter cells, the impact of sulfide was analyzed at pH 8.2 and 6.5. The consequences of egg exposure for growth and survival of the hatched organisms were also studied. Subitaneous eggs, spawned by laboratory-reared organisms, were incubated in near anoxia or anoxia/sulfide for different periods (1, 4, 15 and 32 d) and then transferred to normoxic conditions. Short exposure to near anoxia or anoxia/sulfide did not affect egg viability and subsequent growth and survival. Exposure times ≥15 d caused significant declines in hatching and strong reductions in life expectancy. No significant differences between the effects of near anoxia and anoxia/sulfide (at both pHs) were observed following incubation for 15 d. After 32 d incubation, the hatching success of eggs exposed to anoxia/sulfide at pH 8.2 was significantly higher than that of eggs exposed to near anoxia or to anoxia/sulfide at pH 6.5, and life expectancy was also less reduced. The results indicate that long exposure of eggs to anoxia/sulfide is less detrimental to A. tonsa than near anoxia alone when the pH is in the range of natural seawater (7.9 to 8.3). It seems to be more detrimental when pH is as low as that reached in pore waters (6.0 to 6.5). KEY WORDS: Near anoxia · Sulfide · pH · Acartia tonsaResale or republication not permitted without written consent of the publisher

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“…No differences In the hatching success between the 3 treatments could be observed. Several studies showed that copepod eggs survive anoxia for days, weeks and in some cases years (Uye & Fleminger 1976, Ban & Minoda 1992, Lutz et al 1992, Marcus et al 1994. Marcus et al (1997) compared the impact of anoxia and anoxia/sulphide on the viability of eggs of 3 calanoid copepods using sulphide concentrations ranging from 283 to 352 pm01 1-' at a high pH of 8.1 to 8 7.…”

Section: Resistance Of Eggs and Developmentmentioning

confidence: 99%

Effects of anoxia and sulphide on populations of Cletocamptus confluens (Copepoda, Harpacticoida)

Vopel¹,

Dehmlow²,

Johansson³

et al. 1998

Mar. Ecol. Prog. Ser.

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ABSTRACT-The harpacticoid copepod Cletocamptus confluens (Schmeil 1894), which inhabits mud pools of sheltered shallow water bays, was studied to analyse its ability to survive in anoxia and sulphidic anoxia, its normoxic oxygen consumption, and its glycogen content. In addition, the impact of anoxia and sulphide on the viability of eggs and the time-scale of development of nauplii and copepodids was investigated. AI1 measurc'ments were carried out on laboratory-reared specimens. The mean survival rate of non-gravid females dld not drop below 9Gu,> after 96 h of exposure to both anoxia and sulphidic anoxia. Males and egg sac bearing females showed lower survival rates. The weight-specific glycogen content of non-gravid females (891 8 ? 51.0 pm01 glycosyl units g-' dw) was more than twice as high as that of males (404.3 i 31.4 pm01 glycosyl units g-' dw) and decreased to about 63% during 96 h exposure to anoxic and anoxic/sulphidic conditions. The weight-spccific oxygen consumption of males and non-gravid females amounted to 223.8 i 61.7 and 59.7 z 8.1 pm01 O2 g-' dw h-', respectively. The viability of eggs was not affected during 96 h of anoxia and sulphidic anoxia, and hatching of nauplii was delayed for the period of exposure. The developmental time of nauplii and copepodids from eggs incubated in anoxic or anoxic/sulphidic conditions did not dlffer from that of the normoxic controls. Sex-specific responses to anoxia and possible consequences for population dynamlcs of C. confluens are discussed.

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Effects of low oxygen concentrations on the hatching and viability of eggs of marine calanoid copepods

Cited by 73 publications

References 8 publications

Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

Impacts of hypoxia on the structure and processes in pelagic communities (zooplankton, macro-invertebrates and fish)

Survival of the copepod Acartia tonsa following egg exposure to near anoxia and to sulfide at different pH values

Effects of anoxia and sulphide on populations of Cletocamptus confluens (Copepoda, Harpacticoida)

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