brood size Argentina 8 Argentine continental shelf 4 Brooding 4 Echinodermata 4 Holothuroidea 4 Mar del Plata 4 Psolidae 4 Psolus 4 Psolus patagonicus 4 South America 4 Zygochlamys patagonica 4 continental shelf 4 echinoderm 4 egg 4 egg size 4 embryo 4 juvenile 4 passerine 4 reproductive biology 4 spawning 4 Buenos Aires [Argentina] 3 Agelaioides badius 2 Aves 2 Bolivia 2 Breeding output 2 Brood parasitism 2 Canada 2 Capra aegagrus 2 Caracara 2