Unveiling the Role of Biological and Environmental Factors and the Piscivory in the Recruitment Success of Pikeperch (Stizostedion Lucioperca)

Published: Jan. 1, 2024

Pikeperch (Sander lucioperca) is an important fish species in Eurasian water bodies. However, its recruitment has declined some lakes, necessitating a better understanding of ecological process. In the first summer, young-of-the-year (YOY) pikeperch can be grouped into three sub-cohorts: extremely small (ES), ordinary fingerlings, and piscivorous. We analyzed 12 years biotic abiotic data collected between 2003 2022 at Lipno Reservoir (Czechia) to identify drivers variability abundance piscivorous YOY their impact on new year class. Using Bayesian horseshoe prior approach linear regression, we observed that higher ES conspecifics perch, coupled with increased densities large cladocerans July August, positively impacted YOY. Additionally, August precipitation affected this sub-cohort. The 1+ was influenced by YOYs recorded preceding year. concluded all sub-cohorts contribute success pikeperch, having more direct effect, while indirectly enhance piscivory pikeperch. study provides novel insight factors influencing aids forecasting capabilities.

Language: Английский

Transition to Piscivory Seen Through Brain Transcriptomics in a Juvenile Percid Fish: Complex Interplay of Differential Gene Transcription, Alternative Splicing, and ncRNA Activity

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

ABSTRACT Pikeperch ( Sander Lucioperca ) belongs to main predatory fish species in freshwater bodies throughout Europe playing the key role by reducing planktivorous abundance. Two size classes of young‐of‐the‐year (YOY) pikeperch are known and North America. Our long‐term survey elucidates late‐summer distribution YOY Lipno Reservoir (Czechia) recognizes two distinct subcohorts: smaller pelagic planktivores heavily outnumber larger demersal piscivores. To explore molecular mechanisms accompanying switch from planktivory piscivory, we compared brain transcriptomes both subcohorts identified 148 differentially transcribed genes. The pathway enrichment analyses piscivorous phase be associated with genes involved collagen extracellular matrix generation numerous Gene Ontology (GO), while was for non‐muscle‐myosins (NMM) less GO terms. Transcripts further upregulated periphery NMM network were Pmchl , Pomcl Pyyb all also appetite control producing (an)orexigenic neuropeptides. Noncoding RNAs including three transcripts snoRNA U85. Thirty mostly functionally unrelated those alternatively spliced between subcohorts. results indicate as potentially driven voracity initiate piscivores undergo a dynamic development. We propose spatiotemporal spreading juvenile development over longer period spatial scales through developmental plasticity an adaptation exploiting types resources decreasing intraspecific competition.

Language: Английский