To rest in hydration: hatching phenology of resting eggs of Heterocypris incongruens (Crustacea: Ostracoda)

Rossi, Valeria; Albini, Dania; Benassi, Giorgio; Menozzi, Paolo

doi:10.1127/1863-9135/2012/0251

Cited by 24 publications

(28 citation statements)

References 47 publications

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“…Then, if the conductivity increases depending on evaporation, it would be advantageous that a higher conductivity accelerates the development time of juveniles and inhibits delayed recruitment from resting eggs that should risk to hatch too late for completing their life cycle. At the same time, resting eggs may remain viable in the egg bank and hatch the following hydroperiod (Rossi et al, 2004(Rossi et al, , 2012.…”

Section: Discussionmentioning

confidence: 99%

“…We know that a proportion of resting eggs of H. barbara from egg bank does not hatch after a first inundation event and displays a log-term dormancy (Rossi et al, 2004). The production of both resting and non resting eggs as well as delayed recruitment from them, might be seen as part of a diversified bet-hedging strategy to spread the risk of extinction and to bet on advantage of any extra time available for reproduction (Hairston et al, 1995(Hairston et al, , 1996Simovich and Hathaway, 1997;Rossi et al, 2012). Martins et al (2008) referred to a bet-hedging strategy in describing asynchronous hatching of resting eggs in sexual populations of Eucypris virens and in clonal populations of H. incongruens and E. virens hatching phenology is modulated by the interaction between genotype, environment and maternal effects (Rossi and Menozzi, 1990, 2012a.…”

Section: Discussionmentioning

confidence: 99%

“…We have described the role of temperature, oxygen concentration, pH and conductivity in hatching phenology of resting eggs (Rossi et al, 2004). Hypoxia and high conductivity delayed or prevented hatching and resting egg may remain dormant until the following inundation (Rossi et al, 2004(Rossi et al, , 2012.…”

Section: Introductionmentioning

confidence: 99%

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Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

2013

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

2013

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“…However, dissimilarities in egg production and in hatching percentage involve genotype differences, environmental cues experienced by the mother, and storage conditions of resting eggs (; Rossi and Menozzi, , ; Rossi et al, ). Hatching phenology may vary according to clonal lineage, environmental conditions, and their interaction; it may be spread over 3–4 months from the time of deposition, may be affected by maternal presence and the development time may be highly variable (Angell and Hancock, ; Havel and Talbott, ; Rossi et al, , , ). We found hints that egg size at deposition does not account for the development time and egg size increases with egg age, without a threshold size for hatching or resting (Rossi et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…We found hints that egg size at deposition does not account for the development time and egg size increases with egg age, without a threshold size for hatching or resting (Rossi et al, ). Resting eggs require a period of desiccation to hatch and hatching phenology may be spread over up to four subsequent inundation episodes, independently of photoperiod, egg's age, inundation time or order (Rossi et al, , ).…”

Section: Introductionmentioning

confidence: 99%

Early and late maternal effects on hatching phenology of heterocypris incongruens (crustacea: Ostracoda)

Rossi¹,

Albini

Pellegri

et al. 2015

J. Exp. Zool.

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In ephemeral ponds, the hatching asynchrony of resting eggs may be adaptive and the result of a maternal bet-hedging strategy. A mother can influence the progeny phenology through conditions experienced during life cycle even in early development stages. We investigated the consequences of a hatching delay for offspring and compared early and late maternal effects in a clonal lineage of Heterocypris incongruens. We used females from genetically identical, 40 months old, resting eggs that hatched, asynchronically, after a first (FI) or a second (SI) inundation event. Maternal origin (FI or SI) was considered an early effect involving the maternal response to hatching stimuli during the embryological dormant stage. Maternal age at deposition and egg size were considered late effects that account for maternal conditions during active stage. We compared size and development time of eggs produced by FI and SI females under laboratory condition (24°C 12:12 L:D photoperiod). Maternal origin affected development time to adulthood which was later in FI than in SI females, and fecundity that was higher in FI than in SI females. SI eggs were smaller than FI eggs: size was affected by maternal age at deposition and was directly related to the egg development time. Development time varied from 1 to 117 days and was shorter in SI eggs than in FI eggs. Our results showed that maternal response during embryological stage affects the performance in successive active stages and suggested that hatching asynchrony may be considered a risk spread strategy.

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Heterocypris incongruens maintains an egg bank in stormwater habitats and influences the development of larval mosquito, Culex restuans

Trujillo,

Schwing,

Muturi

et al. 2023

Ecology and Evolution

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Dormant propagules can provide a rapid colonization source for temporary aquatic habitats and set the trajectory for community dynamics, yet the egg banks of stormwater management systems have received little attention. We asked which species hatched from the sediment of drainage ditches in Champaign County, IL, and found bdelloid rotifers and ostracods (Heterocypris incongruens) to be the most common taxa. These sites also are colonized by mosquitoes, and we established laboratory experiments to examine interspecific interactions between common co‐occurring taxa. Culex restuans larvae were reared in the presence or absence of H. incongruens at two intra‐ and interspecific densities (20 or 40 total individuals) and their survivorship to adulthood, development time to adulthood, adult body size, and sex ratio were determined. Survival for Cx. restuans was significantly lower at high larval density than at low larval density in both treatments. Culex restuans larvae reared in the presence of H. incongruens had a shorter development time to adulthood and emerged as larger adults compared to those reared in the absence of H. incongruens. The sex ratios in the H. incongruens treatments were female‐biased whereas those in the Culex‐only treatments were male‐biased. These differences may have epidemiological implications, as only female mosquitoes serve as disease vectors. Our results emphasize the importance of understanding interspecific interactions in influencing larval mosquito development traits.

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To rest in hydration: hatching phenology of resting eggs of Heterocypris incongruens (Crustacea: Ostracoda)

Cited by 24 publications

References 47 publications

Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

Hatching phenology and voltinism of Heterocypris barbara (Crustacea: Ostracoda) from Lampedusa (Sicily, Italy)

Early and late maternal effects on hatching phenology of heterocypris incongruens (crustacea: Ostracoda)

Heterocypris incongruens maintains an egg bank in stormwater habitats and influences the development of larval mosquito, Culex restuans

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