Cultivation of Marine Cladocera, Penilia avirostris DANA
نویسندگان
چکیده
منابع مشابه
Embryonic development time of Penilia avirostris Dana, 1852 in a tropical bay in Brazil.
Development time of embryos in the brood pouch of the cladoceran Penilia avirostris Dana, 1852, was estimated by collecting zooplankton daily for 15 days in surface water of Guanabara Bay, Brazil. Each day the maturity stage of embryos of 90 parthenogenic females was noted. Total development time (egg to birth) varied from 2 to 3 days, the immature phase (stages I to IV) being generally longer ...
متن کاملReproductive aspects of marine cladocerans Penilia avirostris and Pseudevadne tergestina (Crustacea, Branchiopoda) in the outer part of Guanabara Bay, Brazil.
The objective of this study was to report on some aspects of marine cladoceran reproduction in Guanabara Bay. Samples were collected during 1985 using a conical net with 200 microm mesh. Two species were identified: Penilia avirostris and Pseudevadne tergestina. Both species disappeared from the plankton in winter. Two months before this phenomenon, parthenogenetic females displayed reduction i...
متن کاملComparative phylogeography of marine cladocerans
We examined the population genetics of six species of marine cladocerans, using a »600 bp fragment of the cytochrome oxidase subunit I gene sequence. Phylogenetic analysis revealed signiWcant intraspeciWc, semiallopatric phylogenetic breaks in four out of Wve species belonging to the Podonidae, supporting an ancient radiation and oceanic expansion for this group. By contrast, Penilia avirostris...
متن کاملCladocerans (Branchiopoda) of a tropical estuary in Brazil.
The study was conducted in the Capibaribe river estuary in Recife (Brazil) to assess the role played by cladocerans in a eutrophic environment. Samplings were carried out monthly at 4 fixed stations along the estuary from July 1987 to June 1988. Collections were made with a plankton net of 65 micrometers mesh size. Six cladocerans species were registered: Penilia avirostris, Diaphanosoma spinul...
متن کاملHatching rates of resting eggs of 'Cladocera' (Crustacea; Branchiopoda) at a tropical bay, Brazil.
The aim of this study was to determine the development time of embryos and to estimate the hatching rates of resting eggs of cladocerans found in the sediment of Guanabara Bay, Rio de Janeiro, Brazil, under experimental conditions. Eggs were sorted by species (Penilia avirostris--Sididae; Pleopis polyphemoides and Pseudevadne tergestina--Podonidae) and incubated at a temperature of 25 degrees C...
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ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 1978
ISSN: 1349-998X,0021-5392
DOI: 10.2331/suisan.44.393