TRAMPUS, Franc I.: The Effect of Unrelated Workers on Colony Perfomance in a Brood Raiding Leptothoracine ant Intraspecific brood raiding is a common behaviour in many species of ants. This is presumably the result of territorial conflict which may ultimately result in the eviction of a small colony by a numerically larger neighbor that then […]
year: 2002
Shaken, not stirred Of ants and earthquakes
LIGHTON, JRB; DUNCAN, FDD; TURNER, RJ: Shaken, not stirred: Of ants and earthquakes According to anecdotal evidence, many animals including arthropods such as ants change their behavior during earthquake and earthquake precursor events. This poses the question: Are such behavioral responses real, and if so, are they robust enough to be utilized as a means […]
Sex in banana slugs Different clades do different things
LEONARD, J.L.; PEARSE, J.S.*: Sex in banana slugs: Different clades do different things Five clades of banana slugs of the genus Ariolimax occur along the west coast of North America: columbianus from SE Alaska to central California, stramineus from central California to Mexico, and brachyphallus, californicus, and dolichophallus from the northern, central, and southern portions […]
Reinforcement in the butterfly, Colias eurytheme
PAPKE, R.S.*; RUTOWSKI, R.L.: Reinforcement in the butterfly, Colias eurytheme. When selection against hybrids occurs between two closely related species, females are expected to respond by accurately choosing conspecific males, and male secondary sexual characteristics are expected to evolve to clearly reflect species identity. This process, by which pre-zygotic barriers to gene exchange are improved […]
Kleptoparasitism Prevalence in nature and factors promoting its evolution
IYENGAR, E.V.: Kleptoparasitism: Prevalence in nature and factors promoting its evolution Two of the highest priorities for most animals are finding and protecting food resources. Thieves are common, both in the terrestrial and aquatic realms, among invertebrates and vertebrates. Kleptoparasitism, the stealing (inter- or intra-specific) of already-procured food, is ubiquitous. Although this behavior occurs in […]
Does Host Sex Enhance the Transmission Dynamics Of Parasites A Study of Mites and Midges
EDWARDS, D.D.: Does Host Sex Enhance the Transmission Dynamics Of Parasites? A Study of Mites and Midges Larvae of the water mite Unionicola foili undergo a brief parasitic phase with adult chironomids during their life cycle and in doing so acquire nutrition and a mechanism for dispersal. An examination of several life history characteristics of […]
Zinc metalloprotease action in insect follicular developement
HUYBRECHTS, R.; MACOURS, N.; HENS, K.; VANDINGENEN, A.: Zinc metalloprotease action in insect follicular developement In mammals, the prominent enzymes involved in regulation of blood pressure homeostasis, namely the carboxydippetidase angiotensin converting enzyme and the endopeptidase endothelin converting enzyme, both act by use of specific substrates. In insects, the occurrence of these two functional enzymes […]
Yolk Processing and Vitellogenin Gene Expression during Ovarian Maturation in the Giant Freshwater Prawn, Macrobrachium rosenbergii
JAYASANKAR, V. * 1; TSUTSUI, N. 2; JASMANI, S. 1; SAIDO-SAKANAKA, H. 1; AIDA, K. 2; WILDER, M.N. 1: Yolk Processing and Vitellogenin Gene Expression during Ovarian Maturation in the Giant Freshwater Prawn, Macrobrachium rosenbergii Recently, a cDNA encoding vitellogenin (Vg) was cloned in Macrobrachium rosenbergii, and its amino acid sequence deduced. Based on this […]
Variation in yolk allocation in painted turtles (Chrysemys picta)
HARMS, H.K.*; BOWDEN, R.M.: Variation in yolk allocation in painted turtles (Chrysemys picta) Maternal allocation of nutrients to egg yolk in oviparous animals is increasingly recognized as a critical component of embryonic and neonatal fitness. Painted turtles (Chrysemys picta) yolk their eggs over a period spanning late fall to early summer. To examine potential differences […]
Thermal Ecology of Smooth Softshell Turtle (Apalone mutica) Embryos
MULLINS, M.A.*; JANZEN, F.J.: Thermal Ecology of Smooth Softshell Turtle (Apalone mutica) Embryos Smooth softshell turtles (Apalone mutica) bear eggs with hard, water-resistant shells which presumably insulate them from all environmental factors except temperature. To evaluate the phenotypic effects of different mean temperatures and different thermal variances, and to separate temperature effects from maternal effects, […]
