02800naa a2200217 a 450000100080000000500110000800800410001910000160006024500800007626000090015652020640016565000160222965000340224565000180227965000280229765000170232570000170234270000160235970000160237577301910239111355722025-04-24       2025    bl uuuu     u00u1 u    #d1 aRUPP, G. S.  aADVANCES IN SEA CUCUMBER JUVENILE CULTURE IN BRAZIL.h[electronic resource]  c2025  aThe commercial importance, high prices and recent threats of unregulated fisheries throughout the world, including Brazil, increased the interest in sea cucumber aquaculture development. This is an emerging activity in several Indo-Pacific countries, and it is considered a sustainable alternative to supply high quality products to the avid markets, while relieving the pressure over the wild populations. To assess the feasibility of juvenile hatchery production of Holothuria (Halodeima) grisea Selenka, 1867 and Parathyone braziliensis (Verrill, 1868), two native species from Brazil, adult individuals were collected, transferred to the laboratory and subjected to induction to spawning. Collection was carried out at Arma????o do Itapocoroy, Penha, Santa Catarina, (26??47? S; 48??36? W) during low tide from November 2023 to February 2024 (License MMA/SISBIO No. 68215) and transferred to the laboratory (Centro Experimental de Maricultura, Univali, Penha). Inductions to spawning were carried out and successful gamete release, fertilization and larval cultures were obtained for both species, using a combination of techniques normally employed for other sea cucumbers. After the larval period, pentactula stage and metamorphosis to juvenile phase were achieved for both species. For H. H. grisea, doliolarias (~520??m) were observed after 20 days of larval culture and pentactulas were observed 2 days later. Early juveniles were recorded 34 days post-fertilization, and after 50 days, juveniles attained mean size of approximately 1cm.  For P. braziliensis, the initial development was encapsulated (lecithotrophic larvae), leading to the direct release of a pentactula (500??m) larva sixty hours after fertilization, and early juveniles (835??m) were observed after 8 days. After 36 days post-fertilization the juveniles attained a mean size of 2.5mm. This is the first successful experimental production of juveniles in hatchery for both species and the present results open new horizons for the development of sea cucumber aquaculture in Brazil.  aaquaculture  aHolothuria (Halodeima) grisea  aHolothuroidea  aParathyone braziliensis  areproduction1 aCOSTA, R. C.1 aMARENZI, A.1 aMANZONI, G.  tIn: CONGRESSO LATINO-AMERICANO DE EQUINODERMOS, 6., 2025, Santa Marta, Colombia. Resumenes... Santa Marta, Colombia: Instituto de Investigaciones Marinas y Costeras, Invemar, 2025. p. 18