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Modelling transport of inshore and deep‐spawned chokka squid ( Loligo reynaudi ) paralarvae off South Africa: the potential contribution of deep spawning to recruitment

N.J. Downey‐Breedt; M.J. Roberts; W.H.H. Sauer; N. Chang
Fisheries Oceanography · Vol. 25, Issue 1 · pp. 28-43 · 2016

Abstract

The South African chokka squid, Loligo reynaudi , spawns both inshore (≤70 m) and on the mid‐shelf (71–130 m) of the Eastern Agulhas Bank. The fate of these deep‐spawned hatchlings and their potential contribution to recruitment is as yet unknown. Lagrangian ROMS ‐ IBM (Regional Ocean Modelling System‐Individual‐Based Model) simulations confirm westward transport of inshore and deep‐spawned hatchlings, but also indicate that the potential exists for paralarvae hatched on the Eastern Agulhas Bank deep spawning grounds to be removed from the shelf ecosystem. Using a ROMS ‐ IBM , this study determined the transport and recruitment success of deep‐spawned hatchlings relative to inshore‐hatched paralarvae. A total of 12 release sites were incorporated into the model, six inshore and six deep‐spawning sites. Paralarval survival was estimated based on timely transport to nursery grounds, adequate retention within the nursery grounds and retention on the Agulhas Bank shelf (

Bibliographic Information

JournalFisheries Oceanography
PublisherWiley
Publication Date2016-01-01
Publication Year2016
Volume25
Issue1
Pages28-43
Document TypeJournal Article
Print ISSN1054-6006
eISSN1365-2419
DOI10.1111/fog.12132
SubjectGeneral Aquaculture, Fisheries & Fish Science

Access Information

NARA Access Coverage1997-01-01~Current
Journal Homepagehttps://onlinelibrary.wiley.com/loi/13652419
Publisher PageOpen Publisher Page
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