Post-fire insect fauna explored by crown fermental traps in forests of the European Russia.

Wildfires considerably affect forest ecosystems. However, there is a lack of data on the post-fire status of insect communities in these ecosystems. This paper presents results of a study conducted in 2019 which considered the post-fire status of the insect fauna in a Protected Area, Mordovia State Nature Reserve (Republic of Mordovia, centre of European Russia), considered as regional hotspot of insect diversity in Mordovia. We sampled insects on intact (unburned, control) and fire-damaged (burnt in 2010) sites and compared the alpha-diversity between sites. In total, we sampled and analysed 16,861 specimens belonging to 11 insect orders, 51 families and 190 species. The largest orders represented in the samples were Coleoptera (95 species), Diptera (54 species), Hymenoptera (21 species), and Neuroptera (11 species). Other insect orders were represented by between one and four species. The largest four orders (Coleoptera, Lepidoptera, Diptera and Hymenoptera) represented 96.7% of all studied specimens. We found that in the ninth year after low intensity surface fire damage, the insect diversity had returned to a similar level to that of the control (unburned) sites. Sites damaged by crown wildfire differed considerably from other sites in terms of a negative impact on both species diversity and the number of specimens. This indicates the serious effect of the crown fires on the biodiversity and consequent long-term recovery of the damaged ecosystem.

[Analysis of helminthofauna of common spaedfoot Pelobates fuscus (Laurenti, 1768) and moor frog Rana arvalis Nilsson, 1842 (Amphibia: Anura) at their joint habitation].

The helminths fauna of common spaedfoot Pelobates fuscus (Laurenti, 1768) and moor frog Rana arvalis Nilsson, 1842 has been studied at their joint habitation. The stuff was collected in 1998-2002, 2004-2006 years in several regions (republic Mordovia, Samara and Saratov areas). The processing of a stuff is conducted by a method of full helmintologic dissecting. The fauna of helminths considerably differs. For common spaedfoot only 13 species of helminths was detected which also parasitized moor frog (for moor frog 23 species) are detected. The index Jaccar demonstrated mean resemblance structure of helminths and varied from 0.25 till 0.69, and the index Morisite--from 44.58 of % till 74.51 of %. The communities of parasites of common spaedfoot was characterized by low values of an index of Shannon, but the high indexes of an index Simpson, whereas for moor frog tracked the return tendence.

[Effect of photoperiod on growth, physiological and hematological indices of juvenile Siberian sturgeon Acipenser baerii].

The effect of photoperiod on the growth of juvenile Siberian sturgeon Acipenser baerii has been studied in aquarium experiments. The maximum growth rate of juvenile Siberian sturgeon was observed under 12, 16, and 24 h photoperiods. This was accompanied by high respiratory rate and total food consumption and conversion. Rearing in the dark significantly decreased these indices. The hematological indices were within the normal range under optimal photoperiodic conditions. Pronounced neutrophilia and leukopenia were observed in the absence of light.

[Effect of light on white blood cell count in carp Cyprinus carpio L].

In the dark, the lymphocyte count decreased while the monocyte and basophil counts increased in the carp blood. Conversely, the lymphocyte count increased and the monocyte and basophil counts decreased during 12D:12L, 16D:8L, and 0D:24L dark/light cycles, which can be considered as an improvement of the overall physiological state of the yearlings. High light intensity improved the physiological state of carp yearlings, while zero illumination had an inverse effect. No pattern has been revealed for the effect of intermediate dark/light cycles.

[Effect of monochromatic light on the growth and development of larva of the brown frog Rana temporaria L]. / Deistvie monokhromaticheskogo osveshcheniia na rost i razvitie lichinok travianoi liagushki Rana temporaria L.

Acceleration of the growth and development of R. temporaria larvae under the effect of short-wavelength light was observed in experiments. However, the highest linear and weight parameters of postmetamorphic juveniles were recorded upon exposure to yellow and green light, and the lowest parameters, upon exposure to blue light. The red zone of the light spectrum had no apparent effect on the development of tadpoles and juvenile frogs.