Effects of temperature gradients resulting from reservoir discharge on Dorosoma cepedianum spawning in the Savannah River

Michael H. Paller, Bruce M. Saul

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The timing and spatial pattern of gizzard shad, Dorosoma cepedianum, spawning were markedly affected by a temperature gradient caused by the release of hypolimnetic water from an upstream reservoir into the middle reaches of the Savannah River. During 1983 and 1984, a distinct thermal gradient occurred with the warmest temperatures at the downstream end of the 257 km study reach and the coolest temperatures at the upstream end. The occurrence of gizzard shad larvae indicated that spawning began at the sample stations farthest downstream and progressed upstream, peaking at each sample station when it warmed to approximately 19°C. The estimated difference in date of peak density of larvae between the upstream and downstream ends of the gradient was 23 days in 1983 and 35 days in 1984. Because of this pattern, densities of larvae were highest at the downstream end of the study area early in the spawning season and highest at the upstream end of the study area late in the spawning season. Photoperiod and daylength appeared unrelated to the patterns under study. Far-reaching effects of anthropogenic temperature changes on fish spawning and the distribution of larvae are probably common in rivers that receive hypolimnetic discharge.

Original languageEnglish (US)
Pages (from-to)151-160
Number of pages10
JournalEnvironmental Biology of Fishes
Volume45
Issue number2
DOIs
StatePublished - Feb 1996

Fingerprint

Dorosoma cepedianum
temperature profiles
temperature gradient
spawning
larva
river
larvae
photoperiod
temperature
anthropogenic activities
Savannah River
effect
sampling
rivers
fish
water

Keywords

  • Dam
  • Distribution
  • Fish larvae
  • Gizzard shad
  • Hypolimnetic discharge

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

Effects of temperature gradients resulting from reservoir discharge on Dorosoma cepedianum spawning in the Savannah River. / Paller, Michael H.; Saul, Bruce M.

In: Environmental Biology of Fishes, Vol. 45, No. 2, 02.1996, p. 151-160.

Research output: Contribution to journalArticle

@article{e09b7908a4554cc082c5b13691e4acd0,
title = "Effects of temperature gradients resulting from reservoir discharge on Dorosoma cepedianum spawning in the Savannah River",
abstract = "The timing and spatial pattern of gizzard shad, Dorosoma cepedianum, spawning were markedly affected by a temperature gradient caused by the release of hypolimnetic water from an upstream reservoir into the middle reaches of the Savannah River. During 1983 and 1984, a distinct thermal gradient occurred with the warmest temperatures at the downstream end of the 257 km study reach and the coolest temperatures at the upstream end. The occurrence of gizzard shad larvae indicated that spawning began at the sample stations farthest downstream and progressed upstream, peaking at each sample station when it warmed to approximately 19°C. The estimated difference in date of peak density of larvae between the upstream and downstream ends of the gradient was 23 days in 1983 and 35 days in 1984. Because of this pattern, densities of larvae were highest at the downstream end of the study area early in the spawning season and highest at the upstream end of the study area late in the spawning season. Photoperiod and daylength appeared unrelated to the patterns under study. Far-reaching effects of anthropogenic temperature changes on fish spawning and the distribution of larvae are probably common in rivers that receive hypolimnetic discharge.",
keywords = "Dam, Distribution, Fish larvae, Gizzard shad, Hypolimnetic discharge",
author = "Paller, {Michael H.} and Saul, {Bruce M.}",
year = "1996",
month = "2",
doi = "10.1007/BF00005229",
language = "English (US)",
volume = "45",
pages = "151--160",
journal = "Environmental Biology of Fishes",
issn = "0378-1909",
publisher = "Springer Netherlands",
number = "2",

}

TY - JOUR

T1 - Effects of temperature gradients resulting from reservoir discharge on Dorosoma cepedianum spawning in the Savannah River

AU - Paller, Michael H.

AU - Saul, Bruce M.

PY - 1996/2

Y1 - 1996/2

N2 - The timing and spatial pattern of gizzard shad, Dorosoma cepedianum, spawning were markedly affected by a temperature gradient caused by the release of hypolimnetic water from an upstream reservoir into the middle reaches of the Savannah River. During 1983 and 1984, a distinct thermal gradient occurred with the warmest temperatures at the downstream end of the 257 km study reach and the coolest temperatures at the upstream end. The occurrence of gizzard shad larvae indicated that spawning began at the sample stations farthest downstream and progressed upstream, peaking at each sample station when it warmed to approximately 19°C. The estimated difference in date of peak density of larvae between the upstream and downstream ends of the gradient was 23 days in 1983 and 35 days in 1984. Because of this pattern, densities of larvae were highest at the downstream end of the study area early in the spawning season and highest at the upstream end of the study area late in the spawning season. Photoperiod and daylength appeared unrelated to the patterns under study. Far-reaching effects of anthropogenic temperature changes on fish spawning and the distribution of larvae are probably common in rivers that receive hypolimnetic discharge.

AB - The timing and spatial pattern of gizzard shad, Dorosoma cepedianum, spawning were markedly affected by a temperature gradient caused by the release of hypolimnetic water from an upstream reservoir into the middle reaches of the Savannah River. During 1983 and 1984, a distinct thermal gradient occurred with the warmest temperatures at the downstream end of the 257 km study reach and the coolest temperatures at the upstream end. The occurrence of gizzard shad larvae indicated that spawning began at the sample stations farthest downstream and progressed upstream, peaking at each sample station when it warmed to approximately 19°C. The estimated difference in date of peak density of larvae between the upstream and downstream ends of the gradient was 23 days in 1983 and 35 days in 1984. Because of this pattern, densities of larvae were highest at the downstream end of the study area early in the spawning season and highest at the upstream end of the study area late in the spawning season. Photoperiod and daylength appeared unrelated to the patterns under study. Far-reaching effects of anthropogenic temperature changes on fish spawning and the distribution of larvae are probably common in rivers that receive hypolimnetic discharge.

KW - Dam

KW - Distribution

KW - Fish larvae

KW - Gizzard shad

KW - Hypolimnetic discharge

UR - http://www.scopus.com/inward/record.url?scp=0029667683&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029667683&partnerID=8YFLogxK

U2 - 10.1007/BF00005229

DO - 10.1007/BF00005229

M3 - Article

AN - SCOPUS:0029667683

VL - 45

SP - 151

EP - 160

JO - Environmental Biology of Fishes

JF - Environmental Biology of Fishes

SN - 0378-1909

IS - 2

ER -