A contribution to the taxonomy of C. sphaericus sens. lat. (Cladocera, Chydoridae)

Duigan, Catherine A.; Murray, D. A.

doi:10.1007/978-94-009-4039-0_13

Cited by 8 publications

(17 citation statements)

References 2 publications

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“…The organisms were identified using the following specialized literature: Bergamin, 1932;Edmondson, 1959;Scourfield & Harding, 1966;Smirnov, 1974Smirnov, , 1996Young, 1998;Elmoor-Loureiro, 1997;Paggi, 1972;Duigan, 1992;Dumont & SilvaBriano, 1998;Rajapaksa & Fernando, 1987a;Duigan & Murray, 1987;Rajapaksa & Fernando, 1987b;Paggi, 1980;Smirnov, 1998;Frey, 1982;Alonso, 1987;Pennak, 1989;Olesen, 1996;Biraben, 1939;Olivier, 1962;Smirnov & Timms, 1983; Sinev1999. Table 1 shows the results obtained for the physical and chemical variables analysed.…”

Section: Quantitative and Qualitative Analyses Of The Family Chydoridaementioning

confidence: 99%

Cladocera Chydoridae of high altitude water bodies (Serra da Mantiqueira), in Brazil

2002

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The diversity of species of Cladocera, Chydoridae in the water bodies belonging to the water management unity of Serra da Mantiqueira, was studied inside the BIOTA/FAPESP Program. A total of 21 water bodies were analyzed and the sampling was carried out between 9 th and 11 th September, 1999. Horizontal and vertical net hauls were taken at littoral and limnetic region in each lake. Most water bodies in Serra da Mantiqueira unity are small, shallow, and densely colonized by macrophytes. Most species of Cladocera found belong to the Chydoridae family, being typical inhabitants of the littoral zone, living associated with macrophytes. A total of 12 species were found, 9 of the subfamily Aloninae and 3 Chydorinae. In more than half of the water bodies the relative abundance of chydorids reached 100%, and they were dominant in most of the others, with few exceptions. Alona rustica was the most frequent species, occurring in 62% of the water bodies. The results evidenced the importance of the littoral zone as propitious habitats for the species of Chydoridae and contributing significantly to the diversity of Cladocera as a whole.Key words: Cladocera, Chydoridae, zooplankton diversity. RESUMO Cladocera Chydoridae de corpos d'água de grande altitude (Serra da Mantiqueira)A diversidade de espécies de Cladocera Chydoridae da unidade de gerenciamento dos recursos hídricos (UGRHI) da Serra da Mantiqueira foi estudada, como parte do Programa BIOTA/FAPESP. Foram analisadas amostras de 21 corpos d'água desta unidade de gerenciamento e as coletas foram realizadas no período de 9 a 11/9/99. Para a análise da comunidade zooplanctônica foram coletadas amostras por meio de arrastos horizontais e verticais na região limnética e na região litorânea. Os corpos d'água da UGRHI da Serra da Mantiqueira são pequenos, de pouca profundidade e densamente colonizados por macrófitas aquáticas. As espécies de Cladocera encontradas são típicas de região litorânea, vivendo associadas a macrófitas, isto é, representantes da família Chydoridae. Em relação à abundância relativa, esta família representou quase 100% do total de Cladocera da maior parte dos corpos d'água e, quanto à riqueza de espécies, representou mais da metade das espécies de Cladocera. A espécie Alona rustica foi a mais freqüente, ocorrendo em 62% dos corpos d'água. Os resultados obtidos comprovam que nos ambientes estudados a região litorânea desempenha papel importante, favorecendo o desenvolvimento de condições especiais para o crescimento de espécies de Chydoridae e contribuindo significativamente para a diversidade total dos Cladocera.Palavras-chave: Cladocera, Chydoridae, diversidade do zooplâncton. Braz. J. Biol., 62(4A): 681-687, 2002 682 SANTOS-WISNIEWSKI, M. J. et al.

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Section: Quantitative and Qualitative Analyses Of The Family Chydoridaementioning

confidence: 99%

Cladocera Chydoridae of high altitude water bodies (Serra da Mantiqueira), in Brazil

2002

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“…The latter variety is an extremely unreliable taxon (see below) . Duigan & Murray (1987) recognised two distinct morphotypes of C . sphaericus in Ireland .…”

Section: Chydorus Cf Sphaericusmentioning

confidence: 99%

“…Chydorus sphaericus morphotype 2 Duigan & Murray (1987) did not examine any morphotype 2 mature males . However, if this taxon was taxonomically equivalent to C. sphaericus caelatus as described by Smirnov (1971) from material near Lake Baikal, it is reasonable to expect the morphology of the postabdomen of 59 a mature male to be as shown in Smirnov (1971 : Fig.…”

Section: Chydorus Cf Sphaericusmentioning

confidence: 99%

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The ecology and distribution of the littoral freshwater Chydoridae (Branchiopoda, Anomopoda) of Ireland, with taxonomic comments on some species

Duigan

1992

Hydrobiologia

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This paper is the first comprehensive review of the littoral freshwater Chydoridae (Branchiopoda, Anomopoda) of Ireland . It reports on a countrywide survey, during which a total of 316 samples was taken at 287 sampling sites between March, 1984 and June, 1986 . Together with all previous records, the survey results provide baseline data on the ecology and distribution of this important animal group .A total of 41 taxa in 18 genera of the Family Chydoridae has been recorded in Ireland . Several taxa exhibit morphological differences from original descriptions and populations from other geographical regions, and the taxonomic significance of this variation is assessed . All the taxa encountered during this survey are illustrated by scanning electron micrographs . The distribution of each taxon is given and observations are made on regional trends .

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“…In contrast, other authors have separated C. sphaericus s .l . into several independent, but closely-related species (Frey, 1980 ;Duigan & Murray, 1987 ;Roen, 1987) . Data from the present study oppose this opinion and indicate that, at least under certain circumstances, the occurrence of ecotypes may be expected .…”

Section: Introductionmentioning

confidence: 99%

Chydorus ‘mutilus’ Kreis, 1921 — a postephippial form of Chydorus sphaericus (O. F. Müller, 1785)

Brancelj

1996

Hydrobiologia

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Since 1991 faunal collections have been made from the mountain lakes of NW Slovenia . These lakes are at altitudes of between 1250 and 2150 m a .s .l ., and have rich biotas, both in terms of species-richness, and faunal abundance . Amongst the animals collected were 'hump-backed' specimens of genus Chydorus . These are identical with Chydorus 'mutilus', a species described from Swiss mountain lakes by Kreis (1921) . The abundance of specimens in the collections, coupled with the availability of data from four successive years of sampling, allowed the detailed analysis of these populations . This also includes an examination of chitinous remains preserved in subrecent sediments .The results show that C. 'mutilus' Kreis, 1921 actually represents a postephippial form of C . sphaericus (0 . F. Muffler, 1785) . From the data available, it appears that the 'hump-backed' form only occurs under certain environmental conditions . Here I discuss environmental factors having the potential to trigger the formation of hump-backed Chydorus . These findings may prove significant in palaeolimnological studies, and in the reconstruction of palaeotemperatures .In addition, hump-backed animals, apparently identical to European C. 'mutilus', have also been found in a sample taken from Lake Titicaca (Peru) in 1954 . This supports the hypothesis that the hump-backed morph is an environmentally-cued ecophenotype, and not an independent taxon .

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A contribution to the taxonomy of C. sphaericus sens. lat. (Cladocera, Chydoridae)

Cited by 8 publications

References 2 publications

Cladocera Chydoridae of high altitude water bodies (Serra da Mantiqueira), in Brazil

Cladocera Chydoridae of high altitude water bodies (Serra da Mantiqueira), in Brazil

The ecology and distribution of the littoral freshwater Chydoridae (Branchiopoda, Anomopoda) of Ireland, with taxonomic comments on some species

Chydorus ‘mutilus’ Kreis, 1921 — a postephippial form of Chydorus sphaericus (O. F. Müller, 1785)

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