Veterinar, Vol. 59. No. 1., 2021.
Stručni rad
Farming of bluefin tuna (Thunnus thynnus Linnaeus, 1758): development of a closed cycle production
Ivan Ćurić
orcid.org/0000-0002-9488-928X
Leon Grubišić
; Institut za oceanografiju i ribarstvo, Split, Hrvatska
Krešimir Matanović
orcid.org/0000-0002-8878-3526
; Veterinarski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
Nowadays, the tuna (Thunnus thynnus) farming technology is based on fattening juveniles caught from natural populations. The reason is that the technology of artificial fertilization and rearing of juveniles has not been fully developed yet. In the last twenty years, numerous research projects have been financed from EU funds with the aim of establishing technology for a closed cycle production of tuna, from hatchery to market. Extensive research into the physiology of tuna reproduction provides an opportunity to implement induced spawning and collection of a fertilized egg. The research includes an understanding of testicular and ovarian development processes, the influence of sex hormones on sexual maturation, and environmental conditions that regulate spawning. Losses in larval and juvenile rearing are still high. The low survival rate, caused by cannibalism, inadequate nutrition, stress and sensitivity to breeding conditions prevent the production of juveniles in a quantity sufficient for an economically viable production.
Ključne riječi
bluefin tuna; Thunnus thynnus; induced spawning; closed cycle production
Hrčak ID:
261449
URI
Datum izdavanja:
17.6.2021.
Posjeta: 826 *