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Journal Article

Growth and diet of inanga ( Galaxias maculatus ) within a small New Zealand coastal pond system

Rose E. Stuart; Travis Ingram; Gerard P. Closs
New Zealand Journal of Marine and Freshwater Research · Vol. 57, Issue 1 · pp. 88-103 · 2023

Abstract

Inanga ( Galaxias maculatus ) are found in a range of freshwater habitats around much of the Southern Hemisphere. Although they are reasonably well studied within New Zealand, little is known about the populations found in coastal pond systems. This study focussed on inanga diet and population dynamics within a shallow pond complex in coastal Southland, investigating age, growth, distribution, and diet of juvenile inanga over a spring to autumn period. Otolith analysis indicated a three‐month period (September to November) during which fish are hatching, with fish that hatched earlier growing more slowly than later fish. Inanga were found in only one location within the pond complex – a site featuring low water nutrient levels and less access by trout. Diet analysis showed high selectivity for chydorids and chironomid larvae, indicating a mixture of both benthic and pelagic foraging. Overall, this study has provided insight into inanga population dynamics in ponds, which have not previously been observed.

Bibliographic Information

JournalNew Zealand Journal of Marine and Freshwater Research
PublisherWiley
Publication Date2023-03-01
Publication Year2023
Volume57
Issue1
Pages88-103
Document TypeJournal Article
Print ISSN0028-8330
eISSN1175-8805
DOI10.1080/00288330.2021.1968009
SubjectMarine & Freshwater Science

Access Information

NARA Access Coverage1997-01-01~Current
Journal Homepagehttps://onlinelibrary.wiley.com/loi/11758805
Publisher PageOpen Publisher Page
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