Ontogenetic behavior and migration of Gulf of Mexico sturgeon, Acipenser oxyrinchus desotoi, with notes on body color and development
Identifieur interne : 000260 ( PascalFrancis/Checkpoint ); précédent : 000259; suivant : 000261Ontogenetic behavior and migration of Gulf of Mexico sturgeon, Acipenser oxyrinchus desotoi, with notes on body color and development
Auteurs : Boyd Kynard [États-Unis] ; Erika Parker [États-Unis]Source :
- Environmental biology of fishes [ 0378-1909 ] ; 2004.
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Abstract
We observed Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi, in the laboratory and found free embryos (first interval after hatching) hid under rocks and did not migrate. Thus, wild embryos should be at the spawning area. Larvae (first interval feeding exogenously) initiated a slow downstream migration, and some juveniles (interval with adult features) continued to migrate slowly for at least 5 months, e. g., a 1-step long larva-juvenile migration. No other population of sturgeon yet studied has this migration style. A conceptual model using this result suggests wild year-0 sturgeon have a variable downstream migration style with short-duration (short distance) migrants and long-duration (long distance) migrants. This migration style should widely disperse wild fish. The model is supported by field studies that found year-0 juveniles are widely dispersed in fresh water to river km 10. Thus, laboratory and field data agree that the entire freshwater reach of river downstream of spawning is nursery habitat. Foraging position of larvae and early juveniles was mostly on the bottom, but fish also spent hours holding position in the water column, an unusual feeding location for sturgeons. The holding position of fish above the bottom suggests benthic forage in the river is scarce and fish have evolved drift feeding. The unusual migration and foraging styles may be adaptations to rear in a river at the southern limit of the species range with poor rearing habitat (low abundance of benthic forage and high summer water temperatures). Suwannee River Gulf sturgeon and Hudson River Atlantic sturgeon, A. o. oxyrinchus, are similar for initiation of migration, early habitat preference, and diel migration. The two subspecies differ greatly for migration and foraging styles, which is likely related to major differences in the quality of rearing habitat. The differences between Atlantic sturgeon populations show the need for geographical studies to represent the behavior of an entire species.
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Conte Anadromous Fish Research Center, Leetown Science Center, U.S. Geological Survey, One Migratory Way</s1><s2>Turners Falls, MA 01376</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts</s1><s2>Amherst, MA 01003</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region><settlement type="city">Amherst (Massachusetts)</settlement></placeName><orgName type="university">Université du Massachusetts</orgName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">04-0247536</idno><date when="2004">2004</date><idno type="stanalyst">PASCAL 04-0247536 INIST</idno><idno type="RBID">Pascal:04-0247536</idno><idno type="wicri:Area/PascalFrancis/Corpus">000278</idno><idno type="wicri:Area/PascalFrancis/Curation">000098</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000260</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000260</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Ontogenetic behavior and migration of Gulf of Mexico sturgeon, Acipenser oxyrinchus desotoi, with notes on body color and development</title><author><name sortKey="Kynard, Boyd" sort="Kynard, Boyd" uniqKey="Kynard B" first="Boyd" last="Kynard">Boyd Kynard</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>S. O. Conte Anadromous Fish Research Center, Leetown Science Center, U.S. Geological Survey, One Migratory Way</s1><s2>Turners Falls, MA 01376</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Parker, Erika" sort="Parker, Erika" uniqKey="Parker E" first="Erika" last="Parker">Erika Parker</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>S. O. Conte Anadromous Fish Research Center, Leetown Science Center, U.S. Geological Survey, One Migratory Way</s1><s2>Turners Falls, MA 01376</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts</s1><s2>Amherst, MA 01003</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region><settlement type="city">Amherst (Massachusetts)</settlement></placeName><orgName type="university">Université du Massachusetts</orgName></affiliation></author></analytic><series><title level="j" type="main">Environmental biology of fishes</title><title level="j" type="abbreviated">Environ. biol. fishes</title><idno type="ISSN">0378-1909</idno><imprint><date when="2004">2004</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Environmental biology of fishes</title><title level="j" type="abbreviated">Environ. biol. fishes</title><idno type="ISSN">0378-1909</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animal migration</term><term>Behavioral ontogeny</term><term>Color</term><term>Development</term><term>Dispersion</term><term>Feeding</term><term>Gulf of Mexico</term><term>Habitat</term><term>Larva</term><term>Life history</term><term>Pisces</term><term>Rearing</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Ontogenèse comportement</term><term>Migration animale</term><term>Golfe du Mexique</term><term>Couleur</term><term>Développement</term><term>Larve</term><term>Dispersion</term><term>Elevage</term><term>Habitat</term><term>Alimentation</term><term>Cycle évolutif</term><term>Pisces</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Habitat</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We observed Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi, in the laboratory and found free embryos (first interval after hatching) hid under rocks and did not migrate. Thus, wild embryos should be at the spawning area. Larvae (first interval feeding exogenously) initiated a slow downstream migration, and some juveniles (interval with adult features) continued to migrate slowly for at least 5 months, e. g., a 1-step long larva-juvenile migration. No other population of sturgeon yet studied has this migration style. A conceptual model using this result suggests wild year-0 sturgeon have a variable downstream migration style with short-duration (short distance) migrants and long-duration (long distance) migrants. This migration style should widely disperse wild fish. The model is supported by field studies that found year-0 juveniles are widely dispersed in fresh water to river km 10. Thus, laboratory and field data agree that the entire freshwater reach of river downstream of spawning is nursery habitat. Foraging position of larvae and early juveniles was mostly on the bottom, but fish also spent hours holding position in the water column, an unusual feeding location for sturgeons. The holding position of fish above the bottom suggests benthic forage in the river is scarce and fish have evolved drift feeding. The unusual migration and foraging styles may be adaptations to rear in a river at the southern limit of the species range with poor rearing habitat (low abundance of benthic forage and high summer water temperatures). Suwannee River Gulf sturgeon and Hudson River Atlantic sturgeon, A. o. oxyrinchus, are similar for initiation of migration, early habitat preference, and diel migration. The two subspecies differ greatly for migration and foraging styles, which is likely related to major differences in the quality of rearing habitat. The differences between Atlantic sturgeon populations show the need for geographical studies to represent the behavior of an entire species.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0378-1909</s0></fA01><fA02 i1="01"><s0>EBFID3</s0></fA02><fA03 i2="1"><s0>Environ. biol. fishes</s0></fA03><fA05><s2>70</s2></fA05><fA06><s2>1</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Ontogenetic behavior and migration of Gulf of Mexico sturgeon, Acipenser oxyrinchus desotoi, with notes on body color and development</s1></fA08><fA11 i1="01" i2="1"><s1>KYNARD (Boyd)</s1></fA11><fA11 i1="02" i2="1"><s1>PARKER (Erika)</s1></fA11><fA14 i1="01"><s1>S. O. 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All rights reserved.</s1></fA44><fA45><s0>1 p.1/4</s0></fA45><fA47 i1="01" i2="1"><s0>04-0247536</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Environmental biology of fishes</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>We observed Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi, in the laboratory and found free embryos (first interval after hatching) hid under rocks and did not migrate. Thus, wild embryos should be at the spawning area. Larvae (first interval feeding exogenously) initiated a slow downstream migration, and some juveniles (interval with adult features) continued to migrate slowly for at least 5 months, e. g., a 1-step long larva-juvenile migration. No other population of sturgeon yet studied has this migration style. A conceptual model using this result suggests wild year-0 sturgeon have a variable downstream migration style with short-duration (short distance) migrants and long-duration (long distance) migrants. This migration style should widely disperse wild fish. The model is supported by field studies that found year-0 juveniles are widely dispersed in fresh water to river km 10. Thus, laboratory and field data agree that the entire freshwater reach of river downstream of spawning is nursery habitat. Foraging position of larvae and early juveniles was mostly on the bottom, but fish also spent hours holding position in the water column, an unusual feeding location for sturgeons. The holding position of fish above the bottom suggests benthic forage in the river is scarce and fish have evolved drift feeding. The unusual migration and foraging styles may be adaptations to rear in a river at the southern limit of the species range with poor rearing habitat (low abundance of benthic forage and high summer water temperatures). Suwannee River Gulf sturgeon and Hudson River Atlantic sturgeon, A. o. oxyrinchus, are similar for initiation of migration, early habitat preference, and diel migration. The two subspecies differ greatly for migration and foraging styles, which is likely related to major differences in the quality of rearing habitat. 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