Diet and trophic role of octopus on an abalone sea ranch

Gastric tract (crop and stomach) and stable isotope analyses (SIA) were used to evaluate the dietary composition of resident, commercially important Octopus aff. O. tetricus Gould, and its importance as a predator of Haliotis laevigata Donovan, on artificial abalone habitats. Taxonomic diversity and...

Full description

Saved in:
Bibliographic Details
Published in:Fisheries management and ecology 2019-12, Vol.26 (6), p.638-649
Main Authors: Greenwell, Claire N., Loneragan, Neil R., Tweedley, James R., Wall, Mark
Format: Article
Language:English
Subjects:
Aquaculture‐based enhancement
Aquatic crustaceans
artificial reefs
Composition
Crops
Crustaceans
Diet
Haliotis laevigata
Marine molluscs
Mollusks
Octopus aff. O. tetricus
predation
Predators
Stable isotopes
Stocking density
Stomach
Taxa
Trophic levels
Weight
Wet weight
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Gastric tract (crop and stomach) and stable isotope analyses (SIA) were used to evaluate the dietary composition of resident, commercially important Octopus aff. O. tetricus Gould, and its importance as a predator of Haliotis laevigata Donovan, on artificial abalone habitats. Taxonomic diversity and resolution of diet were higher in crops (13 taxa) than stomachs (10 taxa), with the latter dominated by unidentifiable material (%Volume = 74%). Crops contained mainly molluscs (~54%, including 31% abalone) and crustaceans (33%), suggesting octopus are important predators of abalone on the sea ranch. Dietary composition of crops did not differ with increasing octopus weight (
ISSN:0969-997X
1365-2400
DOI:10.1111/fme.12381