Abellán-Martínez, E. (Emilia)

Arizcun-Arizcun, M. (Marta)

García-Alcázar, A. (Alicia)

English

Arizcun-Arizcun, Marta

García-Alcázar, Alicia

Abellán-Martínez, Emilia

Digital.CSIC

COMPLETION OF THE SHI DRUM (UMBRINA CIRROSA) LIFE CYCLE

Repositorio Institucional Digital del IEO

COMPLETION OF THE SHI DRUM (UMBRINA CIRROSA) LIFE CYCLEM. Arizcun, A. García-Alcázar and E. AbellánInstituto Español de Oceanografía. Centro Oceanográfico de Murcia. Ctra. de la Azohía s/n. Puerto de Mazarrón. Murcia (Spain).E-mail: marta.arizcun@mu.ieo.esIntroductionThe shi drum (Umbrina cirrosa) is a species belonging to the Sciaenidae family. Its distribution area comprises the Eastern Atlantic, from the Bay of Biscay to Senegal, the Mediterranean and the Black Sea. It is appreciated in the Mediterranean Region where is consumed regularly (Turkey, Morocco, Greece and Cyprus). It has a good growth rate and can reach a mean body weight of 700g in 15 months (Mylonas et al, 2004). The shi drum has been considered a very promising candidate species for the Mediterranean aquaculture (Basurco y Abellán, 1999) because of its high growth rate, high market price and good adaptability to culture conditions. In all studies on reproduction in captivity made to date, hormonal induction has been used. In Spain, spawning in captivity with hormonal treatment was achieved for the first time in 2009 at the Centro Oceanográfico de Murcia (Arizcun et al. 2009). In this work the first spawning from born in captivity fish-without any hormonal treatment-was obtained. Materials and methodsShi drum juveniles (average body weight 100g) were caught on the Mediterranean coast (Mazarron Bay) in 2007. Wild-caught fish were acclimatized to culture conditions in a 2m3 tank for 3 months and then were transferred to a 15m3 tank for growth-out culture. The juveniles were fed on a mixture of trash fish, squid and commercial pellets. First spawn was obtained by hormonal injection in June 2009. From that date until 2012 all spawns (F1 generation) were obtained using the same techniques. The larval rearing was carried out in a 1m3 tank (Arizcun et al. 2009) and the juveniles were reared to maturity. In May 2013 eighteen (12 males and 6 females -sex ratio 2:1-), 3-year-old broodstock fish (mean weight = 990 g) (F1 generation) were stocked in a 15m3 tank equipped with an overflow egg collector. During a month before the spawning period, the breeders were fed with special commercial broodstock diets (Skretting, Burgos, Spain).  Results3-year-old shi drum (F1) spawned spontaneously over a 42- day period from 15 June to 26 July 2013 and 3 051 850 eggs were collected during this period (Figure 1). Average water temperature during the spawning period ranged from 23.2ºC to 27.2ºC. The rate of buoyant eggs among those collected was variable in the different batches (81.7%-9.8%) with an average (± standard deviation) of 40% ± 26.2 (Figure 2). Fecundity was 508 641 eggs/female and 511 711 eggs/kg (mean weight ± standard deviation of females = 994 ± 143g). The hatched eggs were subsequently reared to the juvenile stage.In conclusion, this is the first time that spontaneous spawning have been obtained (F2) from shi drum born in captivity (F1). Therefore, the whole life cycle of this specie was completed under aquaculture conditions.   Figure 1.  Natural spawning of shi drum in captivity. Number of eggs collected.    Total eggs (TE). Fertilized eggs (FE). Unfertilized eggs (UE).Figure 2. Fertilization percentages of cultured shi drum during spawning period. AcknowledgementsThis study was supported by the research projects 15275/PI/10 of the Seneca Foundation. Comunidad Autónoma de Murcia.ReferencesArizcun, M., E. Abellán and A. García-Alcázar. 2009. Primeros estudios sobre reproducción y cultivo larvario de verrugato (Umbrina cirrosa L.). En: Actas del XII Congreso Nacional de Acuicultura: 518-519Basurco, B. and E. Abellán. 1999. Finfish species diversification in the context of Mediterranean marine fish farming development. In: Options Mèditerranèennes. 24: 9-25. C.I.H.E.A.M. Zaragoza, SpainMylonas, C., Y. Kyriakou, I. Sigelaki, G. Georgiou, D. Stephanou and P. Divanach. 2004. Reproductive Biology of the shi drum (Umbrina cirrosa) in captivity and induction of spawning using GnRHa. The Israeli Journal of Aquaculture 56 (2): 77-94

http://www.repositorio.ieo.es/e-ieo/bitstream/10508/2100/1/Arizcuns.doc

COMPLETION OF THE SHI DRUM (UMBRINA CIRROSA) LIFE CYCLE

Abstract

Similar works

Full text

Available Versions

Digital.CSIC

Repositorio Institucional Digital del IEO