English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The reproduction biology of perch Perca fluviatilis was studied inrelation to lake hydrology, spawning substrate and female size using SCUBA divers duringlate April and mid-May 2009 in Chabařovice Lake, Czech Republic. An extreme displacementof water mass, induced by a long-lasting strong wind, caused the abundance of egg strandsto differ significantly between individual parts of the lake. On average, 91% of perchspawning activity occurred at depths greater than 3 m. The mean concentration of dissolvedorganic carbon (DOC) indicated that the lake belongs to the categorywhere DOC influencing the penetration of ultraviolet radiation, is notresponsible for the deep deposition of egg strands by perch. Most probably, the avoidanceof shallow depths (<3 m) results from strong wind/waves coming from any direction.Larger perch females started to spawn earlier than their smaller conspecifics and theyused shallower depths for depositing their egg strands. As a spawning substrate, perchstrongly selected dead submerged vegetation, such as common reed Phragmitescommunis and worm weed Artemisia sp. These substrates,however, reveal signs of progressive degradation and seem likely to disappear from thelake within several years

knowledge and management of aquatic ecosystems

Location and timing of the deposition of egg strands by perch (<i>Perca fluviatilis</i>L.): the roles of lake hydrology, spawning substrate and female size

Location and timing of the deposition of egg strands by perch (Perca fluviatilisL.): the roles of lake hydrology, spawning substrate and female size