Predator-prey interactions between crayfish Orconectes juvenilis and snails Physa
gyrina are affected by spatial scale and chemical cues.
Average number of Lymnaea columella (Say, 1817), Physa
The population density of Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) an intermediate host of Fasciola hepatica (Linnaeus, 1758), in the Caparao microregion, ES, Brazil/Densidade populacional de Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) hospedeiro intermediario de Fasciola hepatica (Linnaeus, 1758) na microrregiao do Caparao, ES, Brasil
Population biology of the invasive freshwater snail Physa
acuta approached throught genetic markers, ecological characterization and demography.
Hemoglobin concentration showed alteration; increased to 2.6 g in Planorbis collected from Kobry El-Lansh and decreased to 0.8 g in Physa
collected from Annanya, Damietta.
August Cluster 1 (AC1)--Amphipoda-dominated Wetlands.--AC1 (n = 5 wetlands) was characterized by high densities of Amphipoda (Hyallela [indicator for the cluster, P = 0.022] and Gammarus), Hirudinae (Erpobdella, Nephelopsis and Mooreobdella), Ephemeroptera (Caenis and Cloeon), Gastropoda (Physa
, Promenetus, and Gyraulus), Coleoptera (Brychius, and Ilybius), and Enallagma; but lacked Agabus and Chaoborus.
The ecology and life history of the pond snail Physa
revolutum infection in humans are freshwater clams (Corbicula producta) in Taiwan and snails (Physa
occidentalis or Lymnaea sp.) in Thailand (1,5).
The Rainbow Mussel, Lake Erie Watersnake, and the Lake Winnipeg Physa
Snail are all endangered.
(Amphipoda) y Physa
venustula (Gastropoda); Sphaerium sp.
Antagonistic pleiotropy is found not only in humans, but in widely differing species such as hermaphroditic snails Physa
acuta (69), platyfish Xiphophorus maculatus (70), song sparrows Melospiza melodia (71), wild red deer Cervus elaphus (72) and the common guillemot seabirds Uria aalge (73).
Hyalellidae Hyalella curvispina Mollusca Ancylidae Gundlachia gayana Amnicolidae Littoridina cumingi Physidae Physa
chilensis Platyhelminthes Dugessidae Indeterminado Annelida Glossiphoniidae Indeterminado Tubificidae Tubifex sp.