Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Survival and growth of Australian snapper, Pagrus auratus, in saline groundwater from inland New South Wales, Australia
Autore:
Fielder, DS; Bardsley, WJ; Allan, GL;
Indirizzi:
NSW Fisheries, Port Stephens Fisheries ctr, Cooperat Res Ctr Aquaculture, Taylors Beach, NSW 2316, Australia NSW Fisheries Taylors Beach NSW Australia 2316 Beach, NSW 2316, Australia Univ Tasmania, Tasmanian Aquaculture & Fisheries Inst, Sch Aquaculture, Launceston 7250, Australia Univ Tasmania Launceston Australia 7250 ture, Launceston 7250, Australia
Titolo Testata:
AQUACULTURE
fascicolo: 1-2, volume: 201, anno: 2001,
pagine: 73 - 90
SICI:
0044-8486(20010914)201:1-2<73:SAGOAS>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
RED DRUM; POTASSIUM REQUIREMENT; WATERS; SPARIDAE; PISCES;
Keywords:
snapper; Pagrus auratus; aquaculture; saline groundwater;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Fielder, DS NSW Fisheries, Port Stephens Fisheries ctr, Cooperat Res Ctr Aquaculture, Taylors Beach Rd, Taylors Beach, NSW 2316, Australia NSW Fisheries Taylors Beach Rd Taylors Beach NSW Australia 2316
Citazione:
D.S. Fielder et al., "Survival and growth of Australian snapper, Pagrus auratus, in saline groundwater from inland New South Wales, Australia", AQUACULTURE, 201(1-2), 2001, pp. 73-90

Abstract

Australia has extensive resources of inland saline groundwater, which may be suitable for culture of marine fish. This study assessed the suitabilityof saline groundwater, which was pumped from a shallow aquifer into an evaporation pond near Wakool in western New South Wales, for growth and survival of juvenile snapper, Pagrus auratus. Five experiments were conducted. The first showed that snapper (31 g) did not commence feeding, lost equilibrium of buoyancy and became moribund within 3 days after transfer from coastal seawater (diluted to 19 parts per thousand with rainwater) to saline groundwater (19 parts per thousand) Potassium concentration of diluted coastal seawater and groundwater (both 19.6 parts per thousand) was 203 and 9.2 mg l(-1), respectively, while the concentration of most other major ions was similar in water from both sources. In the second experiment, groundwater of21 parts per thousand salinity was fortified with potassium (as KCl) to provide 25%, 50% or 100% of the concentration of potassium found in coastal seawater of 21 parts per thousand salinity. Survival and feeding and swimming behaviour of snapper (1.5 g) held in tanks for 8 days were the same in 50% and 100% potassium-fortified treatments as in coastal seawater controls. However, snapper held in groundwater fortified with only 25% potassium, or raw saline groundwater became moribund after 4 and 2 days, respectively. During the third 42-day experiment, growth, survival and food conversion of juvenile snapper (4.0 g) were the same in diluted coastal seawater (20 partsper thousand) and groundwater (20 parts per thousand) provided the level of potassium in the groundwater was increased to within 60-100% of the concentration in coastal seawater. During the fourth experiment, juvenile snapper were acclimatised to raw saline groundwater by transferring fish from fortified groundwater with initial potassium levels of 100% of that in coastalseawater, to groundwater with 10% lower potassium levels every 3.5 days or20% lower levels every 7 days. A further treatment where snapper were transferred from groundwater fortified initially with potassium levels of 60% of coastal seawater, to groundwater with 20% lower potassium levels every 3.5 days was included. When potassium was reduced to 20% of the concentrationin coastal seawater, in all treatments, fish became moribund. Results fromthe fifth experiment, where groundwater was fortified with either KCl or NaCl at equivalent chloride levels, confirmed that potassium and not chloride ions were responsible for improvement in groundwater. Our results demonstrate that saline groundwater from Wakool, fortified with KCl is a suitable medium for growing snapper juveniles in tanks. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 18:07:40