Estudio ultrastructural del fagocito testicular de Dina lineata (Hirudinea, Erpobdellidae)
Scientia gerundensis, 1985 Bonet, Sergi +1 more
openaire +3 more sources
Related searches:
Contribution to the knowledge of the genus Dina Blanchard, 1892 (Hirudinea: Erpobdellidae)
Hydrobiologia, 1995This paper deals with the genus Dina of the Erpobdellidae. A comprehensive comparison of all known species of this genus is given. A lectotype for Dina absoloni Johansson, 1913, is selected. A new species, Dina latestriata n. sp. from Prespa Lake in Greece is described. Data concerning the evolution of Dina are given.
exaly +2 more sources
Leeches from Chiapas, Mexico, with a New Species ofErpobdella(Hirudinida: Erpobdellidae)
American Museum Novitates, 2018Michael Tessler +2 more
exaly +2 more sources
Chemosensory detection of prey by Nephelopsis obscura (Hirudinoidea: Erpobdellidae)
Hydrobiologia, 1982The chemosensory detection of prey by the freshwater leech Nephelopsis obscura (Erpobdellidae) was investigated in the laboratory. Without direct tactile contact N. obscura of all three size classes tested were unable to detect and react to any of the prey types (Gammarus lacustris, Chironomus sp., Tubifex sp) or prey conditions (live, asphyxiated ...
Ronald W Davies
exaly +2 more sources
Histopathology of hyperoxia in Nephelopsis obscura (Hirudinoidea: Erpobdellidae)
Journal of Invertebrate Pathology, 1987Abstract Small (10–15 mg) and large (300–350 mg) Nephelopsis obscura in the laboratory were exposed to supersaturated oxygen (250–300% saturation) at 4° and 15°C simulating winter and summer field conditions in southern Alberta. The results for both weight groups at both temperatures were very similar.
R.N. Singhal, Ronald W. Davies
openaire +1 more source
Reproductive success and growth of two species of Erpobdellidae: the effect of water temperature
Canadian Journal of Zoology, 1987Cocoon production and hatchling growth of two species of Erpobdellidae (Nephelopsis obscura and Erpobdella punctata) were compared at different water temperatures (5–20 °C). Based on the mean number of cocoons produced per individual, mean numbers of eggs per cocoon, cocoon hatching success, and hatchling growth rates, E.
Frederick J Wrona, Ronald W Davies
exaly +2 more sources
The influence of temperature on the depth distribution of sympatric Erpobdellidae (Hirudinoidea)
Canadian Journal of Zoology, 1987Inter- and intra-specific differences in the behavioral responses of two sympatric Erpobdellidae, Nephelopsis obscura and Erpobdella punctata, to overall water temperature change and thermal gradients were investigated in the laboratory. The results are compared with the seasonal migratory patterns recorded in lentic field habitats.
T. E. Gates, Ronald W. Davies
openaire +1 more source
Intralacustrine speciation in the genus Dina (Hirudinea, Erpobdellidae) in Lake Ohrid (Yugoslavia)
Hydrobiologia, 1989An extensive speciation within Erpobdellidae (resp. Dina) has been noted in the Ohridsko Ezero (Lake) (Yugoslav-Albanian border). All species are anatomically similar to D. lineata, but differ strikingly in their body shapes. To the already described D. ohridana Sket and D. lepinjaSket & Sapkarev, descriptions of D. krilata sp. n., D. svilesta sp.
exaly +2 more sources
Cosexuality in the Leech,Nephelopsis obscura(Erpobdellidae)
International Journal of Invertebrate Reproduction and Development, 1988Summary Hermaphroditism of the erpobdellid leach Nephelopsis obscura is described on the basis of macroscopic and histological studies of the gonads. Perivitellogenic cells (female primordial germ cells) proliferate from the septa of segments XII and XIII in individuals of 26–30 mg and spermatogenic cells from segments XII to XIII of 20–25 mg specimens.
Ronald W. Davies, R. N. Singhal
openaire +1 more source
A Circadian Rhythm of Swimming Behavior in a Predatory Leech of the Family Erpobdellidae
American Midland Naturalist, 1997A wide variety of organisms exhibit circadian rhythms of motor behavior. These daily rhythms are advantageous because they allow animals to synchronize their activ- ities with predictable changes in the environment, including daily fluctuations of light, tem- perature and prey availability.
James D. Angstadt, William H. Moore
openaire +1 more source