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Six species of Leptophlebiidae are reported from Gorgona Island, including two new species, showing a geographic relation to the Chocoan-Caribbean and Andean mayfly faunas.
Two new Nannocandona species are described, and the world records of N. faba Ekman, 1914 are reviewed. It is proposed that the name should be retained only for the original population. Map of distribution and key to all species of the genus are provided, along with the discussion on the parthenogenetic reproduction of the subterranean Candoninae.
Twenty-two species of Cladocera were observed on few rock pools of Western Ghats of Maharashtra, India. Chydoridae was the most species rich family. Genus Alona was rare but species like Leydigia ciliata were regularly found. Localities showed an overall faunal similarity. This is a first detailed study of Cladocera of rocky outcrops from India.
A new genus and species of Leptohyphidae, Loricyphes froehlichi, is described from nymph, subimago and egg. The nymphs present unique armature on body, including large tubercles in all tagma. It is superficially similar to Coryphorus (Coryphoridae), but it is probably related to Tricorythodes based on gill morphology.
Relationships among cells per particle, EPS content and growth rate of Scenedesmus obliquus are investigated. Cells per particle increased from 1.2 to 2.8 when growth rate decreased from 0.65 to 0.40 day-1; but it fell back to 1.2 as growth rate decreased from 0.40 to 0.14 day-1. The increasing EPS content may not lead to colony formation of S. obliquus.
We assessed the effects of photoperiod and salinity using life table bioassays with the rotifer Brachionus ‘Alvarado’. Adding, hatching percentages and morphometry of the lorica. The 15 ‰ and photoperiod (16: 8 h) are the best conditions to rotifer cultivation. The dimensions of B. ‘Alvarado’ including into the SM-clade. Perhaps, our strain coexists in sympatry with other lineages in the same aquatic system.
The paper focuses on a crucial and overlooked aspect of the ecology of chironomid larvae. Their more regularly distribution was associated with seasonally increased density, and a clustered one with decreased density. The maximum burrowing depth (up to 25 cm) positively correlated with total density, but also depended on the size of the larvae.
This paper proves that nitrogen treatment of Paris wastewater since the improvements in WWTP has impacted nitrification in the Seine River. The observations and the modelling tools showed that more nitrifiers are discharged than before but do not develop due to lack in substrate leading in the disappearance of oxygen deficits linked to nitrification.
