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ABSTRACT: A pool of fecal specimens from 3 pikeperch zanders (Sander Lucioperca) from Hungary 2015

PROVIDER: PRJNA784176 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17068070_1.fastq.gz	Fastqsanger.gz
	SRR17068070_2.fastq.gz	Fastqsanger.gz

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Project description:Juvenile pikeperch (Sander lucioperca) undergo several ontogenetic shifts whose timing determines the survival of their first winter. The shift from a planktivorous phenotype to a more active predatory (piscivorous) behavior is accompanied by moving from pelagic to demersal habitat with much more stimuli and hence by potential brain functional reorganizations. During two consecutive years, we collected planktivores and piscivores, with different body sizes between the years recording distinct stages relative to the shift and analyzed their whole-brain transcriptomes framed by detailed ecological knowledge. The differential gene transcription analysis identified a distinct non-overlapping group of transcription factors (TFs) significantly upregulated in each phenotype: TFs upregulated in planktivores correspond to initial establishment of brain regions and overall architecture; TFs upregulated in piscivores correspond to the refinement of neuronal populations and the formation of specific neuronal circuits. The planktivorous phenotype independently of body size was characterized by interconnected activity of two TFs, fosab and junba. Gene set enrichment revealed extracellular matrix and collagen-related Gene Ontology terms in piscivores from both years. A highly increased activity of solute carrier (Slc) transporters was identified in the smaller-bodied piscivorous phenotype (20 members of 12 Slc families). The overall count of Slc genes transcribed in pikeperch brain was 334, which is higher than known for humans (287). The neurotranscriptomics results reflected differences in body size and matched with ecological data and survival rates. The multidimensional brain regulome indicated that the intra-phenotypic body size difference can translate into the specific gene activity of the brain in juvenile pikeperch. The period of transition to piscivory appears to be an important ontogenetic step accompanied by increased specific transcription activity.

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