Accueil Accueil

CCAMLR

Commission pour la conservation de la faune et la flore marines de l'Antarctique

  • Accueil
  • Accès au texte
  • S'identifier

Formulaire de recherche

  • La CCAMLR
  • Mesures de conservation
  • Science
  • Pêcheries
  • Conformité
  • Données
  • Réunions
  • Publications
  • Circulaires
  • English
  • Français
  • Русский
  • Español
  • Accueil
  • Publications
  • CCAMLR Science
  • CCAMLR Science, Volume 24
  • CCAMLR Science, Volume 24 (2023):35-57

Publications

  • Documents de base
  • Bulletin statistique
    • Archives du Bulletin statistique
  • Brochure CCAMLR
  • CCAMLR Science
    • CCAMLR Science : Tous les volumes
  • Mesures de conservation
    • Parcourir les mesures de conservation
    • Mesures de conservation passées et actuelles
  • Rapports de pêcheries
  • Archive des rapports de pêcheries
  • Documents relatifs à la pêche
  • Manuels
  • Affiches et autres documents promotionnels
  • Résumés scientifiques
  • Commander une publication
    • Rapports de réunions (2013) – Achat des rapports sur support papier
  • Bibliothèque de référence des engins de pêche
Print this page
Increase font size
Decrease font size

CCAMLR Science, Volume 24 (2023):35-57

Journal Volume:
CCAMLR Science, Volume 24
Page Numbers:
35-57
Auteur(s):
H. Liu and G. Zhu
download attachmentTéléchargement (3.04 Mo)

Effects of spatial scale on hotspot analysis of the density of Antarctic Krill (Euphausia Superba) in the Antarctic Peninsula Region

Abstract / Description: 

While the influence of spatial scale in ecology is well established, few studies have evaluated the impact of spatial scale on hotspot analysis of biological resources. Using data obtained from the KRILLBASE-ABUNDANCE database, this study aimed to investigate the effects of spatial scale on hotspot analysis of Antarctic krill (Euphausia superba) density distribution in the Antarctic Peninsula. Krill density data from 1929 to 2018 were interpolated at 10-year intervals into 10 spatial scales as follows: 10' × 10', 20' × 20', 30' × 30', 40' × 40', 50' × 50', 1° × 1°, 2° × 2°, 3° × 3°, 4° × 4° and 5° × 5°. Linear, logarithmic, exponential, power-law and parabolic functions were used to determine the relationship between spatial scale and krill density distribution in the Antarctic Peninsula region. Additionally, variations in centroid and area of hotspots at various spatial scales were analysed. The results revealed a strong scaling relationship between spatial scale, number of patches and indices of krill density. The hotspot area increased with an increase in the coarseness of the spatial scale and the calculated location of the centroid showed that the hotspot locations were markedly affected by the spatial scale of analysis, with coarser spatial scales resulting in larger spatial shifts in centroid location. Thus, based on the KRILLBASE-ABUNDANCE database, it is not recommended to use a spatial scale greater than 1° × 1° to identify the local spatial pattern for hotspot analysis of krill density. The effects of spatial scale on other types of krill density data (e.g. catch data, acoustic data from research surveys or acoustic data from fishing vessels) remain to be investigated.

This page was last modified on 13 Mar 2024

Nous contacter

E-mail: ccamlr [at] ccamlr [dot] org
Téléphone: +61 3 6210 1111
Fax: +61 3 6224 8744
Adresse: 181 Macquarie Street, Hobart, 7000, Tasmania, Australia

 

Liens rapides

  • Postes vacants
  • Liste officielle des mesures de conservation en vigueur 2024/25
  • Accomplissements de la CCAMLR
  • Brochure CCAMLR

Current and Upcoming Meetings

  • WG-SAM-2025
  • WG-ASAM-2025
  • WG-EMM-2025

Footer Links French

  • S'identifier
  • Messagerie
  • e-groupes CCAMLR
  • Assistance technique
  • Groupes de discussion de la CCAMLR
  • Droits d’auteur
  • Clause de non-responsabilité et politique de confidentialité
  • Plan du site
© Copyright - the Commission for the Conservation of Antarctic Marine Living Resources 2025, Tous droits réservés.  |  Haut de la page  |  Site créé par Eighty Options