Papers by Rubens Matsushita
Revista da Sociedade Brasileira de Medicina Tropical, 2021
We report a case of envenomation by Dendrobates tinctorius in the northwest of the Amazon Forest.... more We report a case of envenomation by Dendrobates tinctorius in the northwest of the Amazon Forest. The patients were two men, who presented with numbness in the right arm and slight numbness in the lower lip, respectively. Dendrobates tinctorius secretions contain pumiliotoxin, one of several toxins found in the dendrobatidis skin, which interferes with muscle contraction and causes locomotor difficulties. Although Dendrobatidae is a family of anurans known for their venom, few studies describe the symptoms of envenomation in humans.
This study reports on previously unknown characteristics of the reproductive biology of Leptodact... more This study reports on previously unknown characteristics of the reproductive biology of Leptodactylus troglodytes, including reproductive site, courtship and territorial behaviour, advertisement, territorial, courtship and reciprocation calls, fecundity and architecture of underground chambers. The ability of tadpoles to produce foam was also tested in the laboratory. Individuals of L. troglodytes bred near temporary ponds in shaded areas and eggs were laid in underground chambers. Three courtship behaviour sequences were recorded. Courtship and reciprocation calls are important during courtship to maintain association between the bonding pair. Reciprocation calls emitted by females may indicate gender avoiding attacks by males. The underground chambers examined had a complex architecture consisting of multiple internal spherical rooms. Foam nests with eggs/larvae in different stages of development were found inside the chambers. Tadpoles of Leptodactylus troglodytes were able to re...
The Herpetological …, 2009
This study reports on previously unknown characteristics of the reproductive biology of Leptodact... more This study reports on previously unknown characteristics of the reproductive biology of Leptodactylus troglodytes, including reproductive site, courtship and territorial behaviour, advertisement, territorial, courtship and reciprocation calls, fecundity and architecture of underground chambers. The ability of tadpoles to produce foam was also tested in the laboratory. Individuals of L. troglodytes bred near temporary ponds in shaded areas and eggs were laid in underground chambers. Three courtship behaviour sequences were recorded. Courtship and reciprocation calls are important during courtship to maintain association between the bonding pair. Reciprocation calls emitted by females may indicate gender avoiding attacks by males. The underground chambers examined had a complex architecture consisting of multiple internal spherical rooms. Foam nests with eggs/larvae in different stages of development were found inside the chambers. Tadpoles of Leptodactylus troglodytes were able to regenerate foam nests within three hours after the beginning of the experiment. This behaviour was also found in other species of the L. fuscus, L. pentadactylus and L. marmoratus species groups.
Protein & Peptide Letters, 2005
Two hemolytic peptides were isolated from the skin secretion of the Brazilian Hylidae frog Hyla b... more Two hemolytic peptides were isolated from the skin secretion of the Brazilian Hylidae frog Hyla biobeba, using reversed-phase chromatographic procedures. Hylins b1 and b2 exhibit short linear polypeptide chains, a large number of hydrophobic residues, amidated C-termini and hemolytic properties. These two novel peptides are the first examples of bombinins H-like peptides isolated from anurans species not related to Bombina species.
Uploads
Papers by Rubens Matsushita