Consequences of Hatch Phenology on Stages of Fish Recruitment

PLoS One. 2016 Oct 20;11(10):e0164980. doi: 10.1371/journal.pone.0164980. eCollection 2016.

Abstract

Little is known about how hatch phenology (e.g., the start, peak, and duration of hatching) could influence subsequent recruitment of freshwater fishes into a population. We used two commonly sympatric fish species that exhibit different hatching phenologies to examine recruitment across multiple life stages. Nine yellow perch (Perca flavescens) and bluegill (Lepomis macrochirus) annual cohorts were sampled from 2004 through 2013 across larval, age-0, age-1, and age-2 life stages in a Nebraska (U.S.A.) Sandhill lake. Yellow perch hatched earlier in the season and displayed a more truncated hatch duration compared to bluegill. The timing of hatch influenced recruitment dynamics for both species but important hatching metrics were not similar between species across life stages. A longer hatch duration resulted in greater larval yellow perch abundance but greater age-1 bluegill abundance. In contrast, bluegill larval and age-0 abundances were greater during years when hatching duration was shorter and commenced earlier, whereas age-0 yellow perch abundance was greater when hatching occurred earlier. As a result of hatch phenology, yellow perch recruitment variability was minimized sooner (age-0 life stage) than bluegill (age-1 life stage). Collectively, hatch phenology influenced recruitment dynamics across multiple life stages but was unique for each species. Understanding the complexities of when progeny enter an environment and how this influences eventual recruitment into a population will be critical in the face of ongoing climate change.

MeSH terms

  • Animals
  • Climate
  • Life Cycle Stages*
  • Perches / growth & development*
  • Perciformes / growth & development*

Grants and funding

Funding for this project was provided by the Nebraska Game and Parks Commission through the Federal Aid in Sport Fish Restoration Project F-118-R. The funders had a limited role in study design but had no role in data collection and analysis, decision to publish, or preparation of the manuscript.