Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
FIRST-YEAR RECRUITMENT OF LARGE-MOUTH-BASS - THE INTERDEPENDENCY OF EARLY-LIFE STAGES
Autore:
LUDSIN SA; DEVRIES DR;
Indirizzi:
OHIO STATE UNIV,AQUAT ECOL LAB,RES CTR 227,1314 KINNEAR RD COLUMBUS OH 43212 AUBURN UNIV,ALABAMA AGR EXPT STN,DEPT FISHERIES & ALLIED AQUACULTURESAUBURN AL 36849
Titolo Testata:
Ecological applications
fascicolo: 3, volume: 7, anno: 1997,
pagine: 1024 - 1038
SICI:
1051-0761(1997)7:3<1024:FROL-T>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROPTERUS-DOLOMIEUI PISCES; SMALLMOUTH BASS; YELLOW PERCH; BODY SIZE; OVERWINTER MORTALITY; ENGRAULIS-MORDAX; LARVAL SURVIVAL; PREY SELECTION; LAKE-MICHIGAN; GROWTH;
Keywords:
CRITICAL PERIOD; FIRST-WINTER MORTALITY; HATCH DATE; IATROSCAN; LARGEMOUTH BASS; LIPIDS; MICROPTERUS SALMOIDES; OTOLITHS; PREY AVAILABILITY; RECRUITMENT; SIZE-DEPENDENT SURVIVAL; TRIGLYCERIDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
90
Recensione:
Indirizzi per estratti:
Citazione:
S.A. Ludsin e D.R. Devries, "FIRST-YEAR RECRUITMENT OF LARGE-MOUTH-BASS - THE INTERDEPENDENCY OF EARLY-LIFE STAGES", Ecological applications, 7(3), 1997, pp. 1024-1038

Abstract

Four early life events (i.e., hatching, the ontogenetic diet shift topiscivory, fall lipid accumulation, and the first winter) are conceptualized as being critical to Ist-yr recruitment success of largemouth bass (Micropterus salmoides) via cause-and-effect associations among them. Toward this end, we conducted a multiple life-stage investigationof largemouth bass to examine the functional dependency and significance to recruitment of these temporally separated early life events. Specifically, we quantified growth and survival of two largemouth bass year-classes in six Alabama ponds from hatching to the end of the firstwinter. The first winter was an important survival bottleneck with lower largemouth bass survival in ponds with smaller largemouth bass (high-density ponds), relative to ponds with larger fish (low-density ponds). While cannibalism was not important, we found size-dependent first-winter mortality to be regulated directly by lipid reserves (i.e., triglycerides) accumulated during fall, and indirectly by both hatch date and the ontogenetic diet shift to piscivory during summer. Early-hatched largemouth bass attained an initial length advantage, remaining large relative to late-hatched fish, despite the relatively higher growth rate of late-hatched fish during their first month of life. Enhanced size permitted early-hatched fish to become piscivorous before late-hatched fish, increasing their access to fish prey (i.e., sunfishes) during fall. This in turn elevated their fall lipid accumulation and winter survival above that of late-hatched fish. Our results indeed suggest that Ist-yr recruitment of largemouth bass in southern systems isgoverned by several functionally dependent critical events. Because each is likely vital to understanding recruitment variability, we suggest that future recruitment studies should adopt a more synthetic (i.e., multiple life-stage) approach.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 14:56:38