Molluscs exposed to endocrine-disrupting chemicals (EDCs) have exhibited changes in reproductive tract development that are typically associated with androgen or estrogen signaling in vertebrates. However, a role for androgens and estrogens in molluscan reproductive endocrinology has yet to be established. In this study, we investigated putative roles for steroidal androgens and estrogens in re...

Synchronized electromyography and cinematography were used to determine the muscle activity of colubroid snakes during sidewinding and concertina locomotion. The primary muscles studied were the three largest, most superficial epaxial muscles: the Mm. semispinalis-spinalis, longissimus dorsi and iliocostalis. Sidewinding locomotion of Nerodia fasciata and Crotalus cerastes was the result of con...

We performed field experiments to examine brown tree snake (Boiga irregularis) attraction to carrion. These snakes were attracted to carrion and entered traps baited with dead mice as readily as traps baited with live mice. Using the cues arising from both live and dead prey, we examined the relative importance of visual and chemical cues to brown tree snakes. With carrion lures, chemical cues ...

1979. Growth and food consumption in the corn 20 snake, Elapheguttata guttata. Copeia 1979:739-741. BIRKETT, L. 1972. Some relationships between the /~.~.j~~~~ ^food intake and growth of young fish. Symp. Zool. 0 "Soc. Lond. 29:259-269. 20 40 60 80 100 BLISS, C. I. 1967. Statistics in biology. Vol. 1. McGrawR Hill, N.Y. COCHRAN, W. G. 1977. Sampling techniques. John 2. A) Hypothetical growth-ra...

Snake lungs show a remarkable diversity of organ asymmetries. The right lung is always fully developed, while the left lung is either absent, vestigial, or well-developed (but smaller than the right). A 'tracheal lung' is present in some taxa. These asymmetries are reflected in the pulmonary arteries. Lung asymmetry is known to appear at early stages of development in Thamnophis radix and Natri...

The mud snails endemic to the East Atlantic/Mediterranean region (genus Tritia; subfamily Nassariinae) account for second highest diversity within family Nassariidae (Gastropoda: Buccinoidea). In order understand how of species, shell morphologies and ecological traits evolved this genus, a robust phylogenetic framework is needed, yet still unavailable due high levels homoplasy in morphology, m...

Digenean trematode parasites require multiple host species to complete their life cycles, and their abundance can often be strongly correlated with the abundance of their host species. Species richness and abundance of parasites in easily sampled host species may yield an accurate estimate of the species richness and abundance of other hosts in a parasite's life cycle that are difficult to surv...

Many insects are drawn to the heat, ash, and smoke produced by forest fires arrive in large numbers at recent burns, often while fire is still active. Some of these pyrophilic reproduce exclusively immediate aftermath but rarely, if ever, collected from unburnt habitats. Numerous observations made active note an apparent preference among some oviposit burnt portions trees, raising broader quest...

The positive inter-specific relationship between local abundance and large-scale spatial occupancy is one of the most universal patterns in the distribution of species. However, evidence for the validity of this relationship in the marine realm is still scarce, especially for parasites. Using data from published studies, we investigated this relationship in trematode parasites infecting several...