Effects of Unilateral Ovariectomy on Growth of Oocytes in the Ovaries of Adult Toads (Bufo bufo bufo L.)

Analysis of survival probabilities of female common toads, Bufo bufo

Thallium in spawn, juveniles, and adult common toads (Bufo bufo) living in the vicinity of a zinc-mining complex, Poland

A breeding population of the common toad Bufo bufo living in the vicinity of a Zn-Pb smelting works in Bukowno, Poland was studied for the presence of thallium. Tl concentration was measured in the bottom sediments of the spawning pond, in the laid eggs, in juveniles after metamorphosis, and in the selected tissues of the adult individuals. A very high concentration of Tl was detected in the sp...

Dynamic Vision System: Modeling the Prey Recognition of Common Toads Bufo Bufo

The tectal structures underlying the prey-catching of toads are one of the best-known mechanisms in neurobiology. In our paper we present a simpliied model of the prey recognition of the common toad Bufo bufo.We show that the recognition performance can be explained by coupling two neuron layers that exhibit locally excitatory interaction while there is a topographic inhibition between the laye...

Cardiovascular and behavioural changes during water absorption in toads, Bufo alvarius and Bufo marinus.

Blood cell flux (BCF) in the pelvic skin of Bufo marinus was lower than Bufo alvarius when toads rehydrated from deionised water (DI) or 50 mmol l-1 NaCl (NaCl). Despite the lower BCF in B. marinus, water absorption was not different between the species when toads rehydrated from DI or NaCl. When fluid contact was limited to the pelvic skin, water uptake from NaCl was lower than from DI, but be...

[Calcium-dependent chloride channels in plasma membrane of oocytes from toad, Bufo bufo gargarizans].

In this paper, membrane current properties of the fully-grown oocytes from toad, Bufo bufo gargarizans, were studied by using two-microelectrode voltage clamp technique. Axion of adult female toad was destroyed, and then ovarian lobes containing oocytes in stage I to VI were removed and incubated in Ca(2+)-free ND96 solution with collagenase (1.5 mg/ml) for 1 h. Subsequently, the oocytes were w...