Environmental determinants of latitudinal size-trends in cephalopods

Alternative Measures of Farm Size : Trends and Determinants

Size matters – Analysis of shell repair scars in endocerid cephalopods

Endocerids are the dominant cephalopod group in the lower–middle Darriwilian limestones in Baltoscandia which historically were named “Vaginatum Limestone” (“Vaginatenkalk”, Schmidt 1858). These limestones range from south-eastern Sweden to the St. Petersburg region, Russia, and are today subsumed under the Kunda Regional Stage limestones in Estonia, the Lynna, Obukhovo, and Simonkovo formation...

Are latitudinal clines in body size adaptive?

Body size of animals often increases with increasing latitude. These latitudinal clines in body size have interested biologists for over 150 years. However, the mechanisms that generate these clines in size are still unclear, though latitudinal gradients in temperature appear to play an important role. More importantly, many studies that examine latitudinal clines in body size and the mechanism...

Patterns of functional diversity across an extensive environmental gradient: vertebrate consumers, hidden treatments and latitudinal trends

Richard D. Stevens*, Stephen B. Cox, Richard E. Strauss and Michael R. Willig Department of Biological Sciences, The Mueseum, Texas Tech University, Lubbock, TX 79409, USA Department of Biological Sciences, The Institute of Environmental and Human Health, Texas Tech University, Lubbock, TX 79409, USA *Correspondence and present address: National Center for Ecological Analysis and Synthesis, Uni...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...