METAGENESIS IN INSECTS

The elusive life cycle of scyphozoan jellyfish – metagenesis revisited

Massive proliferations of scyphozoan jellyfish considerably affect human industries and irreversibly change food webs. Efforts to understand the role of jellyfish in marine ecosystems are based on a life cycle model described 200 years ago. According to this paradigm the pelagic medusae is considered seasonal and alternates with the benthic polyp stage from which it derives. However, we provide...

Diversity and Abundance of Insects in Wukari, Taraba State, Nigeria

A field survey was conducted in Wukari, Taraba State to assess the diversity and abundance of insect species in selected habitats (residential, open field made up of grassland and an agroecosystem). Sampling were done biweekly using light, pitfall and yellow pan traps set in 3 replicates, 30 m apart. Insects recovered were wet preserved in 70% ethanol except butterflies and moths. Representativ...

Aquatic Insects: Hemimetabolous Insects – Plecoptera

Neuropeptide signaling in insects.

Neuropeptides represent the largest single class of signal compounds and are involved in regulation of development, growth, reproduction, metabolism and behavior of insects. Over the last few years there has been a tremendous increase in our knowledge of neuropeptide signaling due to genome sequencing, peptidomics, gene micro arrays, receptor characterization and targeted gene interference comb...

Spatial memories in insects

whether enough blood circulated in or around the plates to ensure such a function. Furthermore, while the large, flat plates of Stegosaurus might have been thermoregulatory, it is less easy to imagine this working in the spike-like osteoderms of Kentrosaurus. Another possibility is that the plates had a behavioural function, and were used in either sexual selection (there is no apparent sexual ...