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

Rossi, Valeria; Martorella, Alessio; Menozzi, Paolo

doi:10.4081/jlimnol.2013.e18

Cited by 18 publications

(26 citation statements)

References 64 publications

(75 reference statements)

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“…It is known that water temperature and conductivity are important factors controlling the development rate of aquatic crustaceans (Roca and Wansard 1997;Aguilar-Alberola and Mesquita-Joanes 2011;Rossi et al 2013). In fact, the estimated development time of C. pubera was clearly dependent on these parameters, being shorter towards the summer, when temperature and conductivity increased.…”

Section: Journal Of Natural History 1039mentioning

confidence: 97%

“…Heterocypris salina (Brady 1868), another Cyprididae inhabitant of shallow ponds, is able to produce two or three generations per year depending on water temperature (Ganning 1971). Additionally, several studies have shown that other crustaceans, like copepods, can alternate between univoltine and multivoltine strategies according to relevant environmental variables, such as temperature, food availability, photoperiod and hydroperiod (Rossi et al 2013).…”

Section: Journal Of Natural History 1039mentioning

confidence: 99%

“…In addition, salinity modulates the hatching phenology, survival and larval moulting. As conductivity decreases, the appearance of adult stages is delayed and the mean size of adults decreases (Rossi et al 2013). Moreover, each moult is critical because it is immediately followed by rapid calcification of the shell and if conductivity is too low, it has a negative effect on ostracod survival and growth (Mezquita et al 1999).…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of ostracod populations from shallow lakes of Patagonia: life history insights

Coviaga

Cusminsky

Baccalá

et al. 2015

Journal of Natural History

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Wetlands are one of the most valuable natural resources, providing a number of ecosystem services and socio-economic values. Small ponds sustain a rich aquatic biodiversity and because of their short hydrological regimen and small size are excellent environments for population studies of microcrustaceans such as ostracods. This study describes the population dynamics of the Ostracoda fauna in three temporary shallow lakes during one hydroperiod in Argentine Patagonia. Three cosmopolitan species were determined: Cypris pubera, Tonnacypris lutaria and Eucypris virens. Among them, T. lutaria is here reported for the first time from the Neotropical region. Multivariate ordination techniques were used to examine the relationships among environmental variables and ostracod density on each sampling site. High values of conductivity, absorption at 320 nm (as a measure of dissolved organic matter), dissolved oxygen concentration, temperature and chlorophyll a concentration correlated positively with ostracod density. All the populations studied reproduced parthenogenetically, and the life cycles of E.virens and C. pubera were followed in detail by weekly sampling of their populations. The former displayed continuous reproduction, whereas the latter showed a multivoltine strategy. The life history of C. pubera was affected by the seasonality of the habitat. The development rate correlated positively with water temperature; conductivity and temperature had a positive effect on adult size in C. pubera, while conductivity had a negative effect on adult size in E. virens. In this study, we present the first data set on the development and life history of ostracods in Patagonian freshwater environments. However, several questions remain and encourage us to further investigate the relative importance of ostracods in food webs, as well as the importance of inter-specific interactions between ostracods and other taxa.

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Section: Journal Of Natural History 1039mentioning

confidence: 97%

Section: Journal Of Natural History 1039mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of ostracod populations from shallow lakes of Patagonia: life history insights

Coviaga

Cusminsky

Baccalá

et al. 2015

Journal of Natural History

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“…Species of the genus Heterocypris have been recorded in different places with very different environmental conditions (mezquita et al, 1999;Petkowski et al, 2000;Rossi et al, 2013), and H. incongruens can be considered as cosmopolitan or a widely distributed species (mezquita et al, 1999). they are able to sustain dense populations in places with several stressors acting upon them simultaneously, as in eutrophic or temporary water bodies.…”

Section: Discussionmentioning

confidence: 99%

“…they are highly tolerant because they inhabit different types of environments, from hot springs to lakes in the arctic (delorme, 1991;Külköylüoğlu et al, 2007). Some studies on ostracods have examined different features that allow them to remain in aquatic systems, for example, Rossi et al (2013) and Vandekerkhove et al (2013) show that Heterocypris incongruens and Eucypris virens exhibit a high viability in egg resistance to different stresses such as hypoxia, insecticides, digestive enzymes, high salinity, and UV radiation. Horne (1993) and aguilar-alberola and mesquita-Joanes (2011) also show that juvenile and adult Candona patzcuaro and Heterocypris bosniaca can live in dry soil for up to 5 weeks.…”

Section: Introductionmentioning

confidence: 99%

Demographic responses of Heterocypris incongruens (Ostracoda) related to stress factors of competition, predation and food

2016

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Heterocypris incongruens is a widely distributed ostracod which can maintain its populations under stressful conditions such as those in temporary ponds and under low-quality diets, for example, detritus. It often co-occurs with cladocerans and fish living in shallow water bodies. Nevertheless, little is known about its response to the presence of predators, its consumption capacity of cyanobacteria typically present in eutrophic systems, and its interaction with other species in similar habits. We studied here the demographic responses of H. incongruens fed the green alga Scenedesmus acutus, two strains of Microcystis cf. aeruginosa and Limnothrix sp. Experiments were conducted separately and together in the presence of the cladoceran Simocephalus vetulus and the cichlid ﬁsh, Oreochromis kairomones. The ostracod maintained growth in all treatments, the reproductive output decreased on dietary Limnothrix sp., and its life expectancy was significantly lower with the toxic strain of Microcystis. The coexistence of both crustacean species increased the rate of population growth (~ 0.33 day-1) of S. vetulus and life expectancy (36-44 days) of H. incongruens on the test diets compared with controls (23-33 days). Our study suggests facilitation affects the interaction between the two microcrustaceans, especially on poor quality cyanobacterial diets.

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Bet‐hedging in diapausing egg hatching of temporary rotifer populations – A review of models and new insights

García‐Roger

Carmona

2014

Internat. Rev. Hydrobiol.

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Habitat unpredictability is a local adaptation factor shaping life-history traits in rotifer populations. It may select for the evolution of bet-hedging through risk-spreading strategies in diapausing egg hatching. This means that a fraction of diapausing eggs in wild populations do not hatch even when the conditions are favorable for population growth. Thus, there is a remaining fraction of viable diapausing eggs standing in the sediments for longer periods. According to theory, it is expected that the incidence of bet-hedging strategies for diapausing egg hatching will be higher in more uncertain habitats. Here, we review the major predictions derived from theoretical models applied to the case of monogonont rotifers. In the simplest "bad versus good season" models, the highest environmental uncertainty occurs when the probability of a good season is 0.5, and then the optimal hatching fraction is 0.5 too, implying maximum variance in hatching (i.e., maximum bet-hedging). However, there is still little evidence to support this prediction. This is most likely due to the lack of long-term data of habitat fluctuations and the difficulties in identifying and analyzing bet-hedging strategies, as well as the potential to confound genetic variation and phenotypic plasticity. Moreover, we provide new evidence supporting the occurrence of bet-hedging strategies associated with diapausing egg hatching in the Brachionus plicatilis species complex. Our analyses suggest a gradient of predictability in the habitats of these rotifers, and the existence of a significant positive correlation between the hatching fraction of diapausing eggs and an index of habitat predictability.

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

Abstract: The

Cited by 18 publications

References 64 publications

Dynamics of ostracod populations from shallow lakes of Patagonia: life history insights

Dynamics of ostracod populations from shallow lakes of Patagonia: life history insights

Demographic responses of Heterocypris incongruens (Ostracoda) related to stress factors of competition, predation and food

Bet‐hedging in diapausing egg hatching of temporary rotifer populations – A review of models and new insights

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