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ABSTRACT Fish make C-starts to evade predator strikes. Double-bend (DB) C-starts consist of three stages: Stage 1, in which the… Expand SUMMARY We investigated a basic generalization in parasite community ecology stating that stochastic processes played a major… Expand In viviparous species, a conflict over maternal resource allocation may arise between mothers and embryos, between siblings, and… Expand Common names: Sulphur molly (US), Topote del Azufre (MX). Conservation status: Listed as ‘critically endangered’ by the IUCN… Expand Diet of the tropical freshwater fish Heterandria bimaculata (Haeckel) and Poecilia sphenops Valenciennes (Cyprinidontiformes… Expand Abstract. Sexual selection via female choice can afford preferred males comparably higher mating success than those males that… Expand Abstract The suitability of calcein as a marker for population studies depends on (1) the assumption that marked individuals have… Expand Embryos of the viviparous poeciliid fish, Heterandria formosa, develop to term in the ovarian follicle where they undergo a 3,900… Expand THE condition of xanthism or yellowness, accompanied by a generalised defective development of melanin pigment, is well known… Expand 1. A short account is given of the breeding habits of Heterandria formosa in an aquarium.
2. The ovary and the mature ovum are… Expand