Feeding energetics and angling catches of spangled perch, leiopotherapon unicolor (Gunther 1859), (percoidei: Teraponidae)

Gehrke P.C. (1988) Feeding energetics and angling catches of spangled perch, leiopotherapon unicolor (Gunther 1859), (percoidei: Teraponidae). Marine and Freshwater Research, 39 4: 569-577. doi:10.1071/MF9880569


Author Gehrke P.C.
Title Feeding energetics and angling catches of spangled perch, leiopotherapon unicolor (Gunther 1859), (percoidei: Teraponidae)
Journal name Marine and Freshwater Research   Check publisher's open access policy
ISSN 1323-1650
Publication date 1988-01-01
Sub-type Article (original research)
DOI 10.1071/MF9880569
Volume 39
Issue 4
Start page 569
End page 577
Total pages 9
Subject 1104 Complementary and Alternative Medicine
1105 Dentistry
2303 Ecology
1910 Oceanography
1900 Earth and Planetary Sciences
2300 Environmental Science
Abstract Spangled perch, Leiopotherapon unicolor, in aquaria reduced their daily ration as water temperature decreased. Fish held at a mean temperature of 16-8°C did not grow significantly over a period of 180 days, whereas individuals maintained near 22-6°C showed a weight increase of 32'8% over the same period. Both groups of fish metabolized approximately 38% of their energy intake, excreted 57% and allocated 5% for growth. Fish adapted to the lower temperature regime consumed 10-81 kj day-1 compared with a predicted value of 2-08 kj day-1 for fish adapted to warmer temperatures and exposed to 16-8°C. Spangled perch appear to repartition energy resources at some point below 16°C to make up for a shortfall in energy intake caused by reduced ration. Fish in their natural environment may also reduce food intake at low temperatures, as spangled perch caught by angling in winter had less food in their stomachs (0-31% body weight) than fish caught in other seasons (4-87% in spring to 3-13% in autumn). Catch rate in winter (< 1 fish per angler hour) was also lower than that in other seasons (>5 fish per angler hour).
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 23 Aug 2016, 15:28:49 EST by System User