Abstract The spreading of new crayfish species poses a serious risk for freshwater ecosystems; because they are omnivores influence more than one level in the trophic chain and represent significant part benthic biomass. Both environmental change through global warming expansion pet trade increase possibilities their spreading. We investigated potential four “warm water” highly invasive to overwinter temperate zone, so as predict whether these pose European freshwaters. used 15 specimens...

Abstract Freshwater biodiversity is globally threatened by various factors while severe weather events like long-term droughts may be substantially devastating. In order to remain in contact with the water or stay a sufficiently humid environment at drying localities, ability withstand desiccation dwelling hyporheic zone, particularly through vertical burrowing crucial. We assessed of three European native and five non-native crayfish as models survive construct burrows sandy-clayey...

Biological invasions are increasingly recognized ecological and economic threats to biodiversity projected increase in the future. Introduced freshwater crayfish particular protruding invaders, exerting tremendous impacts on native ecosystem functioning, as exemplified by North American spiny-cheek, signal red swamp well Australian common yabby. The marbled is among most outstanding invaders due its parthenogenetic reproduction combined with early maturation high fecundity. As their...

The common carp (Cyprinus carpio) is an important species in global aquaculture. To optimize its production, it necessary to understand behaviour relation environmental and management factors. This study investigated the spatial temporal dynamics of a semi-intensive aquaculture pond under controlled feeding regimes over two growing seasons (2022 2023). Using telemetry stable isotope analysis, we activity, depth utilisation growth practices. activity their use changed time, influenced by...

Studying the coexistence of native species and invasive with similar functional traits, habitat usage, feeding habits is crucial for understanding dynamics invasion ecological changes in invaded ecosystem. Due to competitive exclusion often also dissemination crayfish plague pathogen ( Aphanomyces astaci , Schikora), North American represent a major threat European crayfish. Their co-occurrence only temporary, making studies investigating trophic ecology non-native rare. In this study, niche...

Interactions occurring between species in multiple invaded freshwater ecosystems are often difficult to observe and study. Studies on invasive alien typically focus single species, and, when the community is exclusively composed of their interactions, eventual facilitation hindering processes very scarcely assessed. To investigate such a community, Arno River (Tuscany, Italy) was examined as model system using combined approach stable isotopes dietary analyses. Established have formed...

Abstract Environmental changes such as global warming can affect ecological communities by altering individual life histories and species interactions. Recent studies focusing on the consequences of environmental change interactions highlighted need for a wider, multi‐species context including both trophic non‐trophic (e.g. predator interference). However, effects biotic abiotic factors remain largely unexplored. To fill this gap, we combined laboratory experiments functional response...

Abstract This trial aimed to customize pikeperch ( Sander lucioperca ) larval nutrition using live feed enrichments based on Chlorella vulgaris and Trachydiscus minutus . Pikeperch larvae were fed with rotifers Artemia enriched C. T. during the first 17 days after exogenous feeding (started 4 post‐hatching [dph]) only until 20 dph. Larvae exposed seven different enrichments: (a) Nannochloropsis occulata (Nanno 3600 reed Mariculture) (Control), (b) cultured at 20°C in BG‐117 medium (BG20),...

Nonconsumptive predator-driven mortality (NCM), defined as prey due to predation that does not result in consumption, is an underestimated component of predator-prey interactions with possible implications for population dynamics and ecosystem functioning. However, the biotic abiotic factors influencing this remain largely unexplored, leaving a gap our understanding impacts environmental change on ecological communities. We investigated effects temperature, density, predator diversity...

Spawning substrate is a critical factor in reproduction of commercially valuable percids. Substrate preferences pikeperch Sander lucioperca were investigated using three types artificial spawning substrates: long fibred brush, turf and smooth plastic. There was significantly higher preference for the brush nest, with thick rigid structures, than turf, while plastic nests remained unoccupied. The majority pairs (94.4%) spawned within 14 days beginning experiment. No difference observed...

AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 11:19-30 (2019) - DOI: https://doi.org/10.3354/aei00296 FEATURE ARTICLE Diffusive methane emissions from temperate semi-intensive carp ponds Marcellin Rutegwa1,*, Radek Gebauer1, Lukáš Veselý1, Ján Regenda1, Otakar Strunecký1, Josef Hejzlar2,3, Bořek Drozd1 1Institute of and Protection Waters, South...

Abstract Severe weather events, such as long‐term droughts, are challenging for many freshwater species. To survive drought, crayfish tend to inhabit shelters or burrows where they can remain in contact with water high humidity environments. However, it is not known whether embryogenesis post‐embryonic development occur without free standing water. address this question, three experiments were conducted using artificial air and marbled ( Procambarus virginalis Lyko, 2017) a model Marbled...

This study focused on supplementing pikeperch (Sander lucioperca) larvae with rotifers fed Chlorella vulgaris during the first 15 days post hatching (dph). Larvae were a combination of and artemia under three different enrichments: A) Nannochloropsis occulata, B) vulgaris, C) commercial enrichment-Selco, Spresso from INVE. After 17 trial initiation differences found between treatments survival rate, myomere height (MH), fatty acid composition, stress tolerance. In terms survival, treatment b...

A novel radius of the curvature measurement method for optical spherical surfaces using absolute interferometry is proposed. setup designed and built around a common-path Fizeau interferometer. The cavity length (volume air between reference tested surfaces) can be measured by wavelength tuning interferometry. An interconnection data from three different tunable laser diodes (central wavelengths 780, 785 852 nm) allows us to measure with uncertainty tens hundreds nanometres. Once...

Eastern Europe comprises a significant part of the native ranges for indigenous crayfish species (ICS) belonging to genus Astacus. This region has been largely overlooked by astacologists and considered relatively immune impacts non-indigenous (NICS). The recent discovery two marbled Procambarus fallax f. virginalis populations in Ukraine changed this view. Increased propagule pressure (mainly due pet trade) raised concerns NICS which may negatively impair ecosystems Azov, Black Caspian Seas...

The direct effects of temperature increases and differences among life-history might affect the impacts native invasive predators on recipient communities. Comparisons functional responses can improve our understanding underlying processes involved in altering species interaction strengths may predict effect invading new Therefore, we investigated mourning gecko Lepidodactylus lugubris (Duméril & Bibron, 1836) to explore how temperature, body-size prey density alter predatory ecosystems. We...