MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
Brooding in Psolus patagonicus (Echinodermata: Holothuroidea) from Argentina, SW Atlantic Ocean
JULIANA GIMÉNEZ; PABLO E. PENCHASZADEH
HELGOLAND MARINE RESEARCH
Año: 2010 vol. 64 p. 21 - 21
The mode, season, and time of brooding, egg diameter, egg number per brood, and the characteristics of newly released juveniles of Psolus patagonicus were investigated oV Mar del Plata, Buenos Aires, Argentina, between October 1999 and February 2001. Individuals were attached to the Patagonian scallop, Zygochlamys patagonica. Spawning occurs between February and March. The mean egg diameter, 887 § 26 m, is the highest reported for the family Psolidae. Eggs are brooded under the mothers sole until they develop into crawling juveniles within 7 months. The largest embryos reached a length of 1,941 § 228 m in September. During the brooding period (FebruarySeptember) the number of brooded embryos decreased while their size increased. Our study confirms brooding behaviour in female P. patagonicus.