Study of the embryogenesis of Dunhevedia crassa King, 1853 (Cladocera: Chydoridae) and a comparison of embryonic instar durations in different cladocerans

Kotov, Alexey A.; Saeheng, Sompop; Maiphae, Supiyanit; Damme, Kay Van

doi:10.4081/jlimnol.2013.e47

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…Until now, there was no staging system available for Daphnia magna , the species that is most frequently used for ecological and recently also for developmental research. Though it should be mentioned here that a few perfunctory descriptions of developmental stages in D. pulex, D. magna and an additional cladoceran, Dunhevedia crassa, have been published - some recently - which are based on hours of development [ 5 , 11 , 14 , 15 ]; however, these cannot be used as staging systems due to large gaps and lack of morphological landmarks.…”

Section: Discussionmentioning

confidence: 99%

Development and staging of the water flea Daphnia magna (Straus, 1820; Cladocera, Daphniidae) based on morphological landmarks

Mittmann

Ungerer

Klann

et al. 2014

EvoDevo

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BackgroundCrustaceans of the genus Daphnia are one of the oldest model organisms in ecotoxicology, ecology and evolutionary biology. The publication of the Daphnia pulex genome has facilitated the development of genetic tools to answer long-standing questions in these research fields (Science 331: 555-561, 2011). A particular focus is laid on understanding the genetic basis of the striking ability of daphnids to change their phenotype in response to environmental stressors. Furthermore, Daphnia have recently been developed into crustacean model organisms for EvoDevo research, contributing to the ongoing attempt to resolve arthropod phylogeny. These problems require the comparative analyses of gene expression and functional data, which in turn require a standardized developmental staging system for Daphnia.ResultsHere we provide a detailed staging system of the embryonic development of Daphnia magna based on morphological landmarks. The staging system does not rely on developmental hours and is therefore suitable for functional and ecological experiments, which often cause developmental delays in affected embryos and thus shifts in time reference points. We provide a detailed description of each stage and include schematic drawings of all stages showing relevant morphological landmarks in order to facilitate the application of this staging scheme.ConclusionWe present here a staging system for Daphnia magna, which is based on morphological landmarks. The staging system can be adopted for other daphnids with minor variations since the sequence of development is highly conserved during early stages and only minor heterochronic shifts occur in late embryonic stages.

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Section: Discussionmentioning

confidence: 99%

Development and staging of the water flea Daphnia magna (Straus, 1820; Cladocera, Daphniidae) based on morphological landmarks

Mittmann

Ungerer

Klann

et al. 2014

EvoDevo

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“…In addition to its taxonomic characteristics and distribution in different ecosystems, it is important to understand the development peculiarities and ecological adaptations of this species. Kotov et al (2013) considered that neoteny is a significant characteristic of chydorid evolution, where the developmental time is altered relative to other cladocerans and sexual maturity is also reached relatively faster. The small size and low number of juvenile instars, as well as the initiation of reproduction at an early age may comprise a strategy to minimize the impacts of predation and shortage of food availability according to Lynch (1980a), whereas sexual reproduction and the production of resting eggs may be considered preparation to tolerate extreme conditions (Fryer, 1996a).…”

Section: Introductionmentioning

confidence: 99%

Life history of Karualona muelleri (Richard, 1897) (Chydoridae, Aloninae)

et al. 2019

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Many taxonomic issues still need to be solved for the family Chydoridae, but mainly in the subfamily Aloninae. The species Karualona muelleri is an example of a recent taxonomic redefinition, since it was decoupled from the genus Alona and translocated to another genus. In order to expand our knowledge on the species, we investigated population growth and compared the morphometry of the first and second instars, male, parthenogenetic female, ephippial female, and ephippium. An experimental population was obtained by hatching resting eggs collected from the sediment in a temporary lake located in the Serra da Canastra National Park (Minas Gerais, Brazil). The hatched individuals were subjected to morphometric analyses and used in experiments to assess population growth and fecundity. Reproductive age and lifespan were also monitored in two groups of females in different life stages: parthenogenetic and gamogenetic. The reproductive age occurred between the 1st and 15th days of life, and the greatest longevity was 17 days. The start of gamogenetic reproduction was stimulated by elevated population densities and it characterized the slowdown of exponential population growth. Morphometric analyses detected differences between the development phases, as well as similarities in the morphological features of the male, first and second instars, and the two types of females.

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Alphabetical List of Species with Notes on Synonyms, Taxonomy, Distribution, and Ecology

Błędzki¹,

Rybak²

2016

Freshwater Crustacean Zooplankton of Europe

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Study of the embryogenesis of Dunhevedia crassa King, 1853 (Cladocera: Chydoridae) and a comparison of embryonic instar durations in different cladocerans

Abstract: The aim of this work is to study the embryonic development of a common tropical cladoceran Dunhevedia crassa King, 1853 (Anomopoda: Chydoridae)

Cited by 7 publications

References 21 publications

Development and staging of the water flea Daphnia magna (Straus, 1820; Cladocera, Daphniidae) based on morphological landmarks

Development and staging of the water flea Daphnia magna (Straus, 1820; Cladocera, Daphniidae) based on morphological landmarks

Life history of Karualona muelleri (Richard, 1897) (Chydoridae, Aloninae)

Alphabetical List of Species with Notes on Synonyms, Taxonomy, Distribution, and Ecology

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