WEIGHT: 61 kg
Services: Cum in mouth, Lesbi-show soft, Swinging, For family couples, Golden shower (out)
A search for predators and food selectivity of two native species of Hydra Cnidaria: Hydrozoa from Brazil. The Hydra is the most common representative of freshwater cnidarians.
In general, it is found in freshwaters on every continent, with the exception of Antarctica. The aim of the present study is to gather biological and ecological data on aspects of two species of Hydra native to Brazil: Hydra viridissima and Hydra salmacidis.
Predation and food selectivity experiments were performed to assess the possible predators and the prey preferences, respectively, of the two species. The results indicate that the two species of Hydra were not consumed by any of the predators that were tested, which are typical predators of invertebrates in freshwater: nymphs of Odonata Anisoptera and the phantom midge larvae of Chaoborus sp.
Insecta , adults of Copepoda Cyclopoida Crustacea and the small fish Poecilia reticulata. It was observed that the smaller Hydra , H. The larger H. It can be concluded that both H. At the same time, they are efficient predators, and a positive relationship was observed between the prey size and the Hydra species size. Food selectivity was related to prey size as well as other prey characteristics, such as carapace thickness and swimming efficiency.
Observou-se que H. Hydras are found to occur on all continents except Antarctica Holstein The species Hydra viridissima is also referred as Chlorohydra viridissima and thus belongs to one of the three genera Hydra , Pelmatohydra and Chlorohydra proposed by Schulze for the Family Hydridae. However, in recent times, few scientists have used this taxonomy and most have followed Campbell who, while recognizing four morphological groups of hydra species viridissima , oligactis , vulgaris and braueri , kept all the species in a single genus, Hydra Hemmrich et al.