We compared the influence of recent feeding history on locomotory behaviour in two species of wolf spiders, Hogna helluo (Walckenaer) and Pardosa milvina Hentz, in the laboratory. Both species are cursorial hunters. We maintained the spiders in the laboratory on satiation and stringent feeding regimes and measured their locomotory activity levels for 1 h using a digital activity recording devic...

Spiders have long been noted as classic examples of extreme sexual dimorphism and adaptations to the lifestyle of a sit-and-wait predator. We examined sex-based differences in the metabolic rate of two species of wolf spider that differ in their degree of sexual dimorphism and predatory strategy. Pardosa milvina (Hentz 1877) is a small active wolf spider that does not exhibit a large degree of ...

Life-history theory predicts a trade-off between number of offspring and investment (size) per offspring. An important component of this trade-off is how offspring size influences performance and survival. In this study, we examined the relationships between maternal size, offspring size and clutch size, as well as the relationship between offspring size and performance, in the wolf spider, Hog...

Alfredo Serrai in the volume Gabriel Naudé, Helluo Librorum, e l'Advis pour dresser une bibliothèque, publish version from French to Italian of first exposition Librarianship as a discipline, together with an ample introduction both historical and conceptual. With arguments praxis introduced explained by decades XVII century has begun discipline “Librarianship science selection order books” tha...

There are numerous hypotheses to explain the evolution of sexual dimorphism in spiders. One of the most controversial is the differential mortality model (DMM) which proposes that differing rates of (adult) male and female mortality can result in a skewed operational sex ratio and lead to the evolution of small males. This hypothesis has been examined using a comparative approach which assumes ...

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During World War I there was much lamentation over the "defects of the draft," and the word "shocking" was in frequent use with reference to the condition of a large proportion of men of military age. When, more recently, it became necessary again for society to interpose a shield of human lives between itself and disaster, its cerebral cells once more became agitated over the report that its y...