Nom du corpus

Corpus Systématique Animale

Titre du document

Stage-structured interactions between seasonal and permanent residents of an estuarine nekton community

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Estuaries
  • Nursery habitat
  • Palaemonetes Penaeus
  • Stage-structured interactions
Nom du fichier dans la ressource
Arthropodes_v2b_01862, Poissons_v2b_005120
Auteur(s)
  • R. T. Kneib 1
  • M. Kathyrn Knowlton 2
Affiliation(s)
  • 1) University of Georgia Marine Institute, 31327, Sapelo Island, GA, USA
  • 2) Department of Zoology, University of Georgia, 30602, Athens, GA, USA
Résumé

Estuarine assemblages of fishes and natant decapod crustaceans (i.e. nekton) comprise both permanent resident species and juveniles of coastal marine species that use estuaries primarily as nurseries. In an attempt to understand how the young of marine species successfully invade communities of permanent estuarine residents we studied potential interactions between two of the most abundant decapod crustaceans in nekton assemblages of the southeastern United States. Three years of quantitative samples from an intertidal marsh on Sapelo Island, Georgia showed that densities of the resident daggerblade grass shrimp Palaemonetes pugio were reduced during the time that juvenile white shrimp Penaeus setiferus used the estuary as a nursery. Results of a field enclosure experiment showed that white shrimp had no significant lethal or sublethal effects on adult grass shrimp. However, they did reduce survival of both juvenile and larval grass shrimp in laboratory experiments, suggesting the potential importance of a stage-dependent predatorprey interaction between the two shrimp species. The mortality rate of young grass shrimp in the presence of white shrimp was unaffected by grass shrimp density, but larvae (2.6–3.0 mm) suffered higher mortalities than did juveniles (5.0–15.0 mm). We suggest that the vulnerability of grass shrimp to predation by white shrimp is related to their molting cycle. The ‘window of vulnerability’ opens more often for younger grass shrimp because they molt more frequently. When combined with losses due to other predators and competitors, the impact of early white shrimp cohorts on grass shrimp larvae and juveniles may prevent the resident species from maintaining its population at high densities, thereby freeing resources in the nursery for subsequent cohorts of juvenile white shrimp.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
A94000A00A7F5B0159A935FB5135FF2FAEE5990A
Revue

Oecologia

Année de publication
1995
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
10
Sous-corpus
  • Arthropodes
  • Poissons
Type de publication
Journal
ark:/67375/1BB-CDD0SH5C-D
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