A5058872247- Marine Ecology and Invasive Species
- Myxozoan Parasites in Aquatic Species
- Aquatic Invertebrate Ecology and Behavior
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Cephalopods and Marine Biology
- Marine Biology and Ecology Research
- Parasite Biology and Host Interactions
- Marine Invertebrate Physiology and Ecology
- Marine Biology and Environmental Chemistry
- Microbial Natural Products and Biosynthesis
- Marine Sponges and Natural Products
- Antimicrobial Peptides and Activities
- Marine and coastal plant biology
- Synthesis and Biological Activity
- Advanced Synthetic Organic Chemistry
- Polyamine Metabolism and Applications
- Marine and environmental studies
- Neurobiology and Insect Physiology Research
- Invertebrate Immune Response Mechanisms
St Petersburg University
2014-2023
Phylogenetic relationships and the timing of evolutionary events are essential for understanding evolution on longer time scales. Cheilostome bryozoans a group ubiquitous, species-rich, marine colonial organisms with an excellent fossil record but lack phylogenetic inferred from molecular data. We present genome-skimmed data 395 cheilostomes combine these 315 published sequences to infer key among c. 500 cheilostome species. find that named genera species phylogenetically coherent, rendering...
Parental care is considered crucial for the enhanced survival of offspring and evolutionary success many metazoan groups. Most bryozoans incubate their young in brood chambers or intracoelomically. Based on drastic morphological differences incubation across members order Cheilostomatida (class Gymnolaemata), multiple origins were predicted this group. This hypothesis was tested by constructing a molecular phylogeny based mitogenome data nuclear rRNA genes 18S 28S with most complete sampling...
Immune responses of invertebrate animals are mediated through innate mechanisms, among which production antimicrobial peptides play an important role. Although evolutionary Polychaetes represent interesting group closely related to a putative common ancestor other coelomates, their immune mechanisms still remain scarcely investigated. Previously our has identified arenicins-new the lugworm Arenicola marina, since then these were thoroughly characterized in terms structure and inhibitory...
The evolution of parental care is a central field in many ecological and evolutionary studies, but integral approaches encompassing various life-history traits are not common. Else, the structure, development functioning placental analogues invertebrates poorly understood. Here, we describe life-history, sexual colony dynamics, oogenesis, fertilization brooding boreal-Arctic cheilostome bryozoan Celleporella hyalina. This brooder incubates its progeny calcified protective chambers (ovicells)...
Abstract Background Placentation has evolved multiple times among both chordates and invertebrates. Although they are structurally less complex, invertebrate placentae much more diverse in their origin, development position. Aquatic colonial suspension-feeders from the phylum Bryozoa acquired placental analogues times, representing an outstanding example of structural diversity evolution. Among them, clade Cyclostomata is only one which placentation associated with viviparity polyembryony—a...
Marine invertebrates are a promising source of novel natural products with biological activities. The phylum Bryozoa is relatively under-investigated in this context, although number compounds medical potential has been discovered recent years. Here, we report on the group brominated metabolites from bryozoan Terminoflustra membranaceatruncata, including analysis activities tribrominated terminoflustrindole A (Cm-1) and structures related dibrominated variants terminoflustrindoles B C....
The life history of the ctenostome bryozoan Flustrellidra hispida living intertidally on brown alga Ascophyllum nodosum in White Sea has been studied for first time using colony mapping.Statistical analyses composition (zooidal categories, states) encompassed budding, feeding, reproduction, polypide recycling and zooidal dormancy.This enabled documenting overall population status at a much better resolution than traditional methodology.In ice-free period correlated with size rather season.F....
Autozooids of the cheilostome bryozoan Aquiloniella scabra contain rod-like bacteria in funicular bodies – complex swellings strands. Each body contains symbionts central cavity surrounded by a large, synthetically active internal "sheath-cell" (bacteriocyte) and group flat external cells. The tightly interdigitating lobes these cells form capsule well-isolated from cavity. Slit-like spaces between are filled with electron-dense matrix cytoplasmic processes various sizes shapes (often...
The life histories of two common boreal-Arctic bryozoans – Electra pilosa and Callopora craticula living on kelps in the White Sea are described for first time using colony mapping. Colony functional dynamics (sexual, feeding, budding rejuvenation) was traced seasonally via recording zooidal states. During ice-free season population zygote spawner E. represented by three generations overwintered (maternal) young ones (daughter granddaughter). colonies exhibited two-phased reproduction...
Abstract Symbiotic associations are dynamic systems influenced by both intrinsic and extrinsic factors. Here we describe for the first time developmental seasonal changes of funicular bodies in bryozoan Dendrobeania fruticosa, which unique temporary organs cheilostome bryozoans containing prokaryotic symbionts. Histological ultrastructural studies showed that these undergo strong modification White Sea during ice-free period. Initially (in June) they play a trophic function support...
The outer epithelium of free-swimming larvae marine invertebrates is composed several cell types and performs a variety vital functions.In bryozoan larvae, early anatomical studies revealed rather complex organization this epithelium.The present contribution re-examines the available morphological descriptions, as well investigates anatomically ultrastructurally epispheral (aboral) part pallial in contrasting larval six bryozoans from three orders -Cheilostomatida, Ctenostomatida,...
Symbiotic associations are dynamic systems influenced by both intrinsic and extrinsic factors. Here we describe for the first time developmental seasonal changes of funicular bodies in bryozoan Dendrobeania fruticosa , which unique temporary organs cheilostome bryozoans containing prokaryotic symbionts. Histological ultrastructural studies showed that these undergo strong modification White Sea during ice-free period. Initially (in June) they play a trophic function support development large...