Two new Xiphocentronidae species are described, Machairocentron falciforme sp. nov. and Xiphocentron (Antillotrichia) sclerothrix sp. nov. Illustrations of the males, females and pupae are presented. Adults were obtained through the emergence of pupae in the laboratory and from collections in traps suspended 1 m above the water in four streams in Presidente Figueiredo, Manaus and Barcelos munic...

The rice paddy eel, Pisodonophis boro (P. boro), is of special interest because of its peculiar burrowing habits. P. boro penetrates the substrate tail-first, a technique common for ophichthids, but it is able to burrow head-first as well. P. boro exhibits three feeding modes: inertial feeding, grasping, and spinning. Rotational feeding is a highly specialized feeding mode, adopted by several e...

Identifying the driving forces behind oceanic pelagic shark movements is key to a better understanding of their life history. Some oceanic pelagic shark species have been shown to aggregate in specific regions to mate and/or exploit abundant food resources. The oceanic whitetip shark Carcharhinus longimanus, a subtropical, ectothermic, oceanic pelagic shark that has experienced severe populatio...

ineteenth century Denmark experienced a growth in population more rapid than most other European countries. This growth was primarily based on a relative low infant and child mortality in the European context and an emigration rate lower than that of the other Scandinavian countries. Seen in this perspective, in a very concrete sense the future of the Danish nation was created in the nurseries....

BY SURVEYING VARIATION AT ALLOZYME LOCI IN SEVERAL PHYTOPHAGOUS LEPIDOPTERAN SPECIES (GEOMETRIDAE), WE HAVE TESTED TWO HYPOTHESES ABOUT THE RELATIONSHIP OF GENETIC VARIATION TO ENVIRONMENTAL HETEROGENEITY: (1) that allozyme polymorphisms may exist because of associations between genotypes and "niches" (different host plants, in this instance), and (2) that the overall genetic variation of a spe...

S T O K O E (1961) and Harrison (1961) described Great Grey Shrikes Lanius excubitor persistently chasing small birds and the latter suggested that hunting flight might be more usual than the surprise swoop from a perch which The Handbook of British Birds infers is the regular method of capture. In fact, such chases are not uncommon, but Steinfatt {1941) was more correct when he stated that the...

The extant amphibians (i.e. caecilians, salamanders, and frogs) are characterized by a biphasic lifecycle in that an aquatic larva passes through metamorphosis to become a terrestrial adult [1]. Amphibians show a high diversity in feeding habits that often relate to different stages of development. Amphibian feeding modes comprise suction feeding and suspension feeding in aquatic larvae [2-4] a...

In this research, gut lengths and numerical occurrence of gut contents (NO%) of Syngnathus acus, Syngnathus typhle and Nerophis ophidion were examined. The specimens were captured with beach seine net in different habitats (vegetated and sandy-vegetated etc.) at the coasts of Aegean Sea between 2006-and 2008. The zooplanktonic preys were mostly consumed by Syngnathus acus and Nerophis ophidion,...