Water vole Arvicola amphibius (Linnaeus, 1758) (Arvicolidae) as an agent of biological control of a tree snail Arianta arbustorum (Linnaeus, 1758) (Mollusca, Gastropoda, Helicidae)

The colonization history of British water vole (Arvicola amphibius (Linnaeus, 1758)): origins and development of the Celtic fringe.

The terminal Pleistocene and Early Holocene, a period from 15 000 to 18 000 Before Present (BP), was critical in establishing the current Holarctic fauna, with temperate-climate species largely replacing cold-adapted ones at mid-latitudes. However, the timing and nature of this process remain unclear for many taxa, a point that impacts on current and future management strategies. Here, we use a...

A chromosomal analysis of Nepa cinerea Linnaeus, 1758 and Ranatra linearis (Linnaeus, 1758) (Heteroptera, Nepidae)

An account is given of the karyotypes and male meiosis of the Water Scorpion Nepa cinerea Linnaeus, 1758 and the Water Stick Insect Ranatra linearis (Linnaeus, 1758) (Heteroptera, Nepomorpha, Nepidae). A number of different approaches and techniques were tried: the employment of both male and female gonads and mid-guts as the sources of chromosomes, squash and air-drying methods for chromosome ...

Atlantic Salmon, Salmo salar Linnaeus, 1758

Trinoton querquedulae (Linnaeus, 1758) (Phthiraptera: Amblycera, Menoponidae) - a rare parasite of the Eider duck Somateria mollissima (Linnaeus, 1758).

In October 2006 an individual of the Common Eider (Somateria mollissima) was examined and one female of Trinoton querquedulae was found on one of the remiges. This species of lice was recorded for the first time in Poland on the studied host. Up till now, T querquedulae has been noted only on this duck species in Belgium. Considering the extremely scarce information available, this species of l...

Macroanatomical aspects of the gastrointestinal tract of the alpaca (Vicugna pacos Linnaeus, 1758) and dro- medary (Camelus dromedarius Linnaeus, 1758)

Although camelids and taxonomic ruminants share fundamental convergent properties, such as microbial fermentation and a sorting mechanism in the forestomach with a resulting high degree of digesta particle size reduction, there are important differences in the capacity to process high amounts of food. We describe qualitative and quantitative characteristics of the gastrointestinal anatomy of al...