We described the ultrastructure and histochemistry of the reproductive system of five
Callinectes species, and evaluate the seasonal variation in weight of the reproductive …

Based on our discussions with fishermen and analysis of catches from professional fishing,
this work confirms the presence of the American blue crab Callinectes sapidus in the …

Coastal marine ecosystems world-wide are threatened by invasions of non-indigenous
invertebrate species, altering population, community and ecosystem processes. Here, we …

Testis of the Teleostean fish Trisopterus minutus capelanus has been examined to study the
organization of the seminiferous tubules and the ultrastructural features of the germ cells …

The fine structure of the euspermatozoa of rough periwinkles (Littorina saxatilis, L. arcana
and L. nigrolineata), the edible periwinkle (L. littorea) and flat periwinkles (L. obtusata and L …

Comprehending marine invasions requires a better knowledge of the biological traits of
invasive species, and the future spread of invasive species may be predicted through …

Insemination and fertilization are temporally separate events in most insects and, therefore,
create potential opportunities for female mediated processes to influence paternity …

Electron microscopical studies were carried out on spermatid and sperm structure in P.
pictus. The spermatid nuclear envelope possesses pores and is surrounded by microtubules …

Alien invasive species represent a major threat in Italian freshwaters. Despite national and
European regulations aimed at the control and prevention of new invasive species, the …