Metapopulation structure of a semi-anadromous fish in a dynamic environment

Frederick Feyrer, James Hobbs, Shawn Acuna, Brian Mahardja, Lenny Grimaldo, Melinda Baerwald, Rachel C. Johnson, Swee J Teh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The Sacramento splittail (Pogonichthys macrolepidotus) is a relatively large (400 mm), long-lived (8 years) demersal cyprinid of conservation importance endemic to the San Francisco Estuary (SFE), California, USA. It exhibits a semi-anadromous life cycle spending adult life in low to moderate salinity (0-12) habitat with migrations into upstream freshwater rivers and floodplains for spawning during winter-spring. The species persists as two genetically distinguishable populations - one dominant and one subordinate - separated by discrete spawning habitats that we suggest resemble an island-mainland metapopulation structure. The populations overlap in distribution in the SFE, yet segregation is maintained with individuals tending to aggregate or school with others of similar population heritage and natal origin. The populations are spatially connected via dispersal of the dominant population into the subordinate population's spawning habitat when climate patterns produce freshwater outflow sufficient to form a bridge of suitable low salinity habitat across the upper SFE. Habitat affinities of the two populations, hydrodynamic modeling studies, and historical outflow records together suggest such conditions occur in approximately 1/3 of years overall with an irregular frequency. This dynamic pattern of spatial connectivity controlled by climate variability may be an important driver of gene flow between the two populations.

Original languageEnglish (US)
Pages (from-to)709-721
Number of pages13
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume72
Issue number5
DOIs
StatePublished - Jan 6 2015

Fingerprint

anadromous fish
metapopulation
habitat
fish
estuary
habitats
estuaries
spawning
outflow
spawning population
salinity
cyprinid
climate
gene flow
connectivity
floodplain
population distribution
life cycle
hydrodynamics
floodplains

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics

Cite this

Metapopulation structure of a semi-anadromous fish in a dynamic environment. / Feyrer, Frederick; Hobbs, James; Acuna, Shawn; Mahardja, Brian; Grimaldo, Lenny; Baerwald, Melinda; Johnson, Rachel C.; Teh, Swee J.

In: Canadian Journal of Fisheries and Aquatic Sciences, Vol. 72, No. 5, 06.01.2015, p. 709-721.

Research output: Contribution to journalArticle

Feyrer, F, Hobbs, J, Acuna, S, Mahardja, B, Grimaldo, L, Baerwald, M, Johnson, RC & Teh, SJ 2015, 'Metapopulation structure of a semi-anadromous fish in a dynamic environment', Canadian Journal of Fisheries and Aquatic Sciences, vol. 72, no. 5, pp. 709-721. https://doi.org/10.1139/cjfas-2014-0433
Feyrer, Frederick ; Hobbs, James ; Acuna, Shawn ; Mahardja, Brian ; Grimaldo, Lenny ; Baerwald, Melinda ; Johnson, Rachel C. ; Teh, Swee J. / Metapopulation structure of a semi-anadromous fish in a dynamic environment. In: Canadian Journal of Fisheries and Aquatic Sciences. 2015 ; Vol. 72, No. 5. pp. 709-721.
@article{4f026238cbdb49a6bdce03dce93c36f6,
title = "Metapopulation structure of a semi-anadromous fish in a dynamic environment",
abstract = "The Sacramento splittail (Pogonichthys macrolepidotus) is a relatively large (400 mm), long-lived (8 years) demersal cyprinid of conservation importance endemic to the San Francisco Estuary (SFE), California, USA. It exhibits a semi-anadromous life cycle spending adult life in low to moderate salinity (0-12) habitat with migrations into upstream freshwater rivers and floodplains for spawning during winter-spring. The species persists as two genetically distinguishable populations - one dominant and one subordinate - separated by discrete spawning habitats that we suggest resemble an island-mainland metapopulation structure. The populations overlap in distribution in the SFE, yet segregation is maintained with individuals tending to aggregate or school with others of similar population heritage and natal origin. The populations are spatially connected via dispersal of the dominant population into the subordinate population's spawning habitat when climate patterns produce freshwater outflow sufficient to form a bridge of suitable low salinity habitat across the upper SFE. Habitat affinities of the two populations, hydrodynamic modeling studies, and historical outflow records together suggest such conditions occur in approximately 1/3 of years overall with an irregular frequency. This dynamic pattern of spatial connectivity controlled by climate variability may be an important driver of gene flow between the two populations.",
author = "Frederick Feyrer and James Hobbs and Shawn Acuna and Brian Mahardja and Lenny Grimaldo and Melinda Baerwald and Johnson, {Rachel C.} and Teh, {Swee J}",
year = "2015",
month = "1",
day = "6",
doi = "10.1139/cjfas-2014-0433",
language = "English (US)",
volume = "72",
pages = "709--721",
journal = "Canadian Journal of Fisheries and Aquatic Sciences",
issn = "0706-652X",
publisher = "National Research Council of Canada",
number = "5",

}

TY - JOUR

T1 - Metapopulation structure of a semi-anadromous fish in a dynamic environment

AU - Feyrer, Frederick

AU - Hobbs, James

AU - Acuna, Shawn

AU - Mahardja, Brian

AU - Grimaldo, Lenny

AU - Baerwald, Melinda

AU - Johnson, Rachel C.

AU - Teh, Swee J

PY - 2015/1/6

Y1 - 2015/1/6

N2 - The Sacramento splittail (Pogonichthys macrolepidotus) is a relatively large (400 mm), long-lived (8 years) demersal cyprinid of conservation importance endemic to the San Francisco Estuary (SFE), California, USA. It exhibits a semi-anadromous life cycle spending adult life in low to moderate salinity (0-12) habitat with migrations into upstream freshwater rivers and floodplains for spawning during winter-spring. The species persists as two genetically distinguishable populations - one dominant and one subordinate - separated by discrete spawning habitats that we suggest resemble an island-mainland metapopulation structure. The populations overlap in distribution in the SFE, yet segregation is maintained with individuals tending to aggregate or school with others of similar population heritage and natal origin. The populations are spatially connected via dispersal of the dominant population into the subordinate population's spawning habitat when climate patterns produce freshwater outflow sufficient to form a bridge of suitable low salinity habitat across the upper SFE. Habitat affinities of the two populations, hydrodynamic modeling studies, and historical outflow records together suggest such conditions occur in approximately 1/3 of years overall with an irregular frequency. This dynamic pattern of spatial connectivity controlled by climate variability may be an important driver of gene flow between the two populations.

AB - The Sacramento splittail (Pogonichthys macrolepidotus) is a relatively large (400 mm), long-lived (8 years) demersal cyprinid of conservation importance endemic to the San Francisco Estuary (SFE), California, USA. It exhibits a semi-anadromous life cycle spending adult life in low to moderate salinity (0-12) habitat with migrations into upstream freshwater rivers and floodplains for spawning during winter-spring. The species persists as two genetically distinguishable populations - one dominant and one subordinate - separated by discrete spawning habitats that we suggest resemble an island-mainland metapopulation structure. The populations overlap in distribution in the SFE, yet segregation is maintained with individuals tending to aggregate or school with others of similar population heritage and natal origin. The populations are spatially connected via dispersal of the dominant population into the subordinate population's spawning habitat when climate patterns produce freshwater outflow sufficient to form a bridge of suitable low salinity habitat across the upper SFE. Habitat affinities of the two populations, hydrodynamic modeling studies, and historical outflow records together suggest such conditions occur in approximately 1/3 of years overall with an irregular frequency. This dynamic pattern of spatial connectivity controlled by climate variability may be an important driver of gene flow between the two populations.

UR - http://www.scopus.com/inward/record.url?scp=84928560027&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84928560027&partnerID=8YFLogxK

U2 - 10.1139/cjfas-2014-0433

DO - 10.1139/cjfas-2014-0433

M3 - Article

VL - 72

SP - 709

EP - 721

JO - Canadian Journal of Fisheries and Aquatic Sciences

JF - Canadian Journal of Fisheries and Aquatic Sciences

SN - 0706-652X

IS - 5

ER -