Loss of negative eye-size allometry in a population of Aplochiton zebra (Teleostei: Galaxiidae) from the Falkland Islands.

No Thumbnail Available
File version
Author(s)
McDowall, RM
Pankhurst, NW
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)

C.M.King

Date
2005
Size
File type(s)
Location
License
Abstract

The population of zebra trout (Aplochiton zebra - Galaxiidae) in Red Pond, Falkland Islands, lacks the negative eye size allometry that is typical of the species elsewhere. Eye size retains a near constant relationship to head length throughout growth in Red Pond. In addition, the bold, narrow, vertical, zebra-like, dark bands typically found on the body of this species are lacking, or are present in the Red Pond population only as broader dusky blotches. Absence of negative allometry is probably due to lack of coupling of eye and somatic growth, probably owing to slow growth of the fish living in the challenging dietary environment of a turbid lake. Observations of diet show that the species is a generalised invertebrate carnivore, but that food intake may be low, suggesting that the modified coupling of eye growth to somatic growth is a likely explanation of the loss of negative allometry.

Journal Title

New Zealand Journal of Zoology

Conference Title
Book Title
Edition
Volume

32

Issue

1

Thesis Type
Degree Program
School
DOI
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Zoology

Persistent link to this record
Citation
Collections