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Titolo:
COMPARATIVE GROWTH AND MORTALITY OF BONAMIA-OSTREAE-RESISTANT AND WILD FLAT OYSTERS, OSTREA-EDULIS, IN AN INTENSIVE SYSTEM - I - FIRST YEAROF EXPERIMENT
Autore:
BAUD JP; GERARD A; NACIRIGRAVEN Y;
Indirizzi:
POLDER CHAMPS,UNITE RECH AQUACOLE PAYS LOIRE F-85230 BOUIN FRANCE LAB GENET AQUACULTURE & PATHOL F-17390 LA TREMBLADE FRANCE
Titolo Testata:
Marine Biology
fascicolo: 1, volume: 130, anno: 1997,
pagine: 71 - 79
SICI:
0025-3162(1997)130:1<71:CGAMOB>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUSPENSION-FEEDING BIVALVES; GALICIA NW SPAIN; RIA-DE-VIGO; OXYGEN-CONSUMPTION; CRASSOSTREA-GIGAS; PEARL OYSTER; HETEROZYGOSITY; TEMPERATURE; FILTRATION; PARASITE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
57
Recensione:
Indirizzi per estratti:
Citazione:
J.P. Baud et al., "COMPARATIVE GROWTH AND MORTALITY OF BONAMIA-OSTREAE-RESISTANT AND WILD FLAT OYSTERS, OSTREA-EDULIS, IN AN INTENSIVE SYSTEM - I - FIRST YEAROF EXPERIMENT", Marine Biology, 130(1), 1997, pp. 71-79

Abstract

Since the early nineteen-seventies, the parasitic protozoans Marteilia refringens and Bonamia ostreae have consistently deleteriously affected the French production of Ostrea edulis (Linne). Purification and inoculation of B. ostreae that were achieved in the late nineteen-eighties allowed a selection program to be initiated. Two O. edulis strains, S85 and S89, were raised that displayed significant resistance to B.ostreae in the held. Growth was monitored to ensure that the resistant strains grew at a rate comparable to that of controls, using two crosses between the first generation of S89 and the second generation of S85 (G1G2), and between the first generation of S89 and wild oysters (G0G1). Growth and mortality were monitored for seven consecutive months in an intensive open circulating system at the IFREMER station of Bouin (Vendee, France). A Chapman-Richards model of growth revealed thatthe two ''resistant'' crosses grew significantly better than two controls from Quiberon Bay (Brittany), an area in which B. ostreae is endemic, and Palavas (Mediterranean Sea), where oysters are less infested by this parasite. The asymptotic values for growth curves ranged between 27.2 and 28.2 g for G1G2 and G0G1 vs 21.0 and 22.8 g for the controls. There was a similar trend in mortality, with G1G2 (11.8%) surviving better than the three other populations (from 28.7 to 57.5%). B. ostreae was not detected during the experiments and mortalities were attributed to feeding conditions that were not optimal, reinforced by gametogenesis and high temperatures during the summer. It is suggested that the better performance of G1G2 and G0G1 resulted from their increased resistance to stress.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 16:25:29