Although most of my research as been with squamata reptiles, being a herpetologist in Venezuela involves being somewhat of a generalist. There are way too many herps and very few herpetologist. During my field work in the llanos, I have spend considerable time with croc biologist and due to my draw towards large reptiles I have ended up helping in collaborating with them quite a bit.
Back in 1990 I was among the people that participated on the first reintroduction of Orinoco crocodiles in the the wild as an effort revocer their populations and later in 1998, while I was looking for anacondas with a filming crew from England, we were lucky enough to find the first two clutches of the reintroduced animals in the wild. Later on, my follow up of other animals reintroduced in other places gave me enough information to assess the age at first reproduction of these wonderful reptiles.
On 1999 I started teaching a course of
for Boston University (click here to see
of the students) that allowed me to travel throughout Ecuador and
many of its wonderful natural areas. One of which is dead in the
midle of a very pristine rainforest in the basin of the Napo River,
Biodiversity Station. While looking for a black water lagoon that
a friend suspected was around, we ran into a nest of dwarf caimans (Paleosuchus
trigonatus). This findings gave me the opportuinty channel
interest of some of my students on collecting good data on the natural
history of these very unknown species that so far has produced two
contributions on their
nesting habits and the
budget of the babies. While were were there we also studied
diet, habitat use of dwarf caimans as well as how the overlap niche
Publications on Crocodilian biology
Rivas, J. A. and R. Y. Owens Crocodylus intermedius (Orinoco crocodile): age at first reproduction Herpetological Review.
White, J. M. and J. A. Rivas, Paleosuchus trigonatus (Dwarf Caiman) Neonate time budget. Herpetological Review
Rivas, J. A., Aktay, S. A. and R. Y. Owens. 2001 Paleosuchus trigonatus (Schneider’s Smooth-fronted Caiman): Nesting and hatching Herpetological Review. 32: 251. (PDF file)
© Jesus A. Rivas. All