ORCID Profile
0000-0002-2398-9267
Current Organisation
James Cook University
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Publisher: Elsevier BV
Date: 02-2014
Publisher: Informa UK Limited
Date: 09-2006
Publisher: Elsevier BV
Date: 08-2012
Publisher: Wiley
Date: 03-2004
DOI: 10.1007/S11745-004-1222-6
Abstract: We determined the effect of dietary long-chain (> or = C20) PUFA (LC-PUFA), 20:5n-3 and 22:6n-3, on larval striped trumpeter (Latris lineata) biochemistry through early development and during live feeding with rotifers (Brachionus plicatilis). Rotifers were enriched using seven experimental emulsions formulated with increasing concentrations of n-3 LC-PUFA, mainly 20:5n-3 and 22:6n-3. Enriched rotifer n-3 LC-PUFA concentrations ranged from 10-30 mg/g dry matter. Enriched rotifers were fed to striped trumpeter larvae from 5 to 18 d post-hatch (dph) in a short-term experiment to minimize gross deficiency symptoms such as poor survival that could confound results. No relationships were observed between larval growth or survival with dietary n-3 LC-PUFA at 18 dph. The larval FA profiles generally reflected those of the rotifer diet, and significant positive regressions were observed between most dietary and larval FA at 10, 14, and 18 dph. The major exception observed was an inverse relationship between dietary and larval 22:5n-3. The presence of 22:5n-3 in elevated amounts when dietary 22:6n-3 was depressed suggests that elongation of 20:5n-3 may be occurring in an attempt to raise body concentrations of 22:6n-3. We hypothesize that accumulation of 22:5n-3 might be an early indicator of 22:6n-3 deficiency in larval fish that precedes a reduction in growth or survival. A possible role of 22:5n-3 as a biochemical surrogate for 22:6n-3 is discussed.
Publisher: Wiley
Date: 02-01-2020
DOI: 10.1111/RAQ.12598
Abstract: Grouper aquaculture is currently trending towards production of hybrids, due to their improved growth and disease resistance. The predominant cross is between tiger grouper ( Epinephelus fuscoguttatus ) females and giant grouper ( Epinephelus lanceolatus ) males (TGGG). Sustainable TGGG aquaculture development is limited by reliance on wild‐caught ‘trash’ fish as feed rather than commercially formulated feeds. Specific TGGG nutrient requirement values remain limited, especially for larger fish that consume the highest volumes of feed. This limits the effectiveness of formulated feeds to provide optimal growth and feed conversion in an economically efficient manner. This review examines the current knowledge of hybrid grouper nutrient requirements for grow‐out feeds and identifies knowledge gaps to inform further research that will enable development of cost‐effective feeds that optimize fish growth, feed conversion and health. Current best practice in TGGG feeds specifies a relatively high protein requirement (53.5% crude protein), with higher arginine and lower lysine requirements than previously reported for grouper species. Like other groupers, the hybrid appears to require low lipid levels (10–14%) however, it remains to be elucidated whether this increases significantly with body size. The nutrient requirement data within this review provide a starting point for development of specific hybrid grouper feeds. However, commercialization of such feeds requires better understanding of the socio‐economic context of the target industry. While formulated feeds may be more cost‐effective, their implementation is limited by inferior growth compared with ‘trash’ fish. Performance gains are expected through increased understanding of size‐specific nutrient requirements and specific raw material quality criteria.
Publisher: Springer Science and Business Media LLC
Date: 09-2004
Publisher: American Society of Parasitologists
Date: 08-2007
DOI: 10.1645/GE-1121R.1
Publisher: Elsevier BV
Date: 08-2013
Publisher: Public Library of Science (PLoS)
Date: 15-12-2016
Publisher: Elsevier BV
Date: 12-2013
Publisher: Wiley
Date: 03-2009
DOI: 10.1111/J.1365-2761.2009.01107.X
Abstract: The chondracanthid copepod, Chondracanthus goldsmidi is an ectoparasite of gills, inner opercula and nasal cavities of cultured striped trumpeter, Latris lineata (Forster). Whilst often present in high numbers (up to 60 parasites per host), little is known about its effect on striped trumpeter. In this study C. goldsmidi was associated with extensive epithelial hyperplasia and necrosis. Pathological changes were most pronounced near the parasite's attachment site, with papilloma-like growths surrounding the entire parasite resulting in deformation of the filament. The number of mucous cells increased near the parasite attachment sites on both the opercula and gills. Mast cells were absent in healthy gills in contrast numerous mast cells were identified in the papilloma-like growths. Immunostaining identified piscidin-positive mast cells in the papilloma-like growths, presenting the first evidence of piscidin in the family Latridae.
Publisher: Elsevier BV
Date: 08-2007
Publisher: Elsevier BV
Date: 07-2005
Publisher: CSIRO Publishing
Date: 2003
DOI: 10.1071/MF02105
Abstract: Teleost larvae are reliant on sensory organs for feeding, in particular for the detection and subsequent capture of prey. The present study describes the development of sensory organs in cultured striped trumpeter larvae, Latris lineata. In addition, a short-term feeding trial was conducted to examine the feeding response of larvae with different senses available streptomycin sulfate was used to ablate the superficial neuromasts, and testing larvae in the dark prevented visually mediated feeding. Some non-visual senses are available to striped trumpeter larvae from an early age, as indicated by the presence of superficial neuromasts at hatching, and innervated olfactory organs and a developed inner ear from Day 3 post hatching. The neuromasts proliferated on the head and body with increasing larval age, and formation of the lateral line canal had commenced by Day 26 post hatching. Oral taste buds were not present in any of the larvae examined, up to Day 26 post hatching. At hatching, the retina was at an early stage in development, but differentiated rapidly and was presumed functional coincident with the onset of feeding on Day 7 post hatching. The ventro-temporal retina was the last to differentiate, and was distorted by the embryonic fissure, such that larval vision in the forward and upward visual field would be compromised. In contrast, the dorso-temporal retina was the first area to differentiate, and presumptive rod and double-cone development occurred in this area from Days 11 and 16, respectively, indicating that the forward and downward directed visual field is most suited for acute image formation. Larvae on Day 18 post hatching demonstrated increased feeding with an increase in the senses available, with 8 ± 3% of streptomycin-treated larvae feeding in the dark (chemoreception and inner ear mechanoreception only) and 27 ± 5% of untreated larvae feeding in the light (all senses available). It remains to be demonstrated whether there is an advantage to larval growth and survival by providing live feed during the dark phase in culture, facilitating feeding 24 hours per day.
Publisher: Wiley
Date: 05-09-2012
DOI: 10.1111/J.1365-2761.2012.01413.X
Abstract: Myxozoan parasites are known pathogens of cultured finfish. Kudoa neurophila n. comb. (Grossel, Dyková, Handlinger & Munday) has historically infected hatchery-produced striped trumpeter, Latris lineata (Forster in Bloch and Schneider), a candidate species for seacage aquaculture in Australia. We examined the efficacy of four water treatment methods to prevent K. neurophila infection in post-larval (paperfish) and juvenile striped trumpeter. Treatments included dose-controlled ultraviolet irradiation [hydro-optic disinfection (HOD)], ozone with conventional UV (ozone), mechanical filtration at 25 μm and then foam fractionation (primary filtration), and 50-μm-filtered sea water (control). In post-larvae (initially 10.3 ± 2.7 g, mean ± SD, 259 days post-hatching, dph), the infection prevalence (PCR test) after 51 days was 93 ± 12% in the control, 100 ± 0% in primary filtration and 0 ± 0% in both ozone and HOD. Likewise, in juveniles (initially 114 ± 18 g, 428 dph), prevalence was 100 ± 0% in the control and primary filtration treatments with no infection detected in ozone and HOD. Concurrently, there was a 50-100% reduction in heterotrophic bacteria and 100% reduction in presumptive Vibrio sp. in sea water HOD and ozone treatments. HOD with a dose of ≥44 mJ cm(-2) UV was as effective as ozonation at >700 mV ORP for 10 min, in preventing K. neurophila infection.
Publisher: Elsevier BV
Date: 08-2001
Publisher: Elsevier BV
Date: 02-2006
Publisher: Elsevier BV
Date: 04-2009
No related grants have been discovered for Jennifer Cobcroft.