The Grizzly, February 3, 2005

Students Videoconference with Sri Lanka • Forensics Team Coach-less • Where Have All the Trees Gone? • It\u27s Cold in Here • Learning the Roots and Aspects of Freedom of Expression: Special Topic Course • Contraception and the Y Chromosome: Male Birth Control Options • Influenza: How to Survive the Yearly Epidemic • Where in the World is Your Study Abroad Application? • Opinions: Random Rantings of Racial Relations; Law Should not Justify Artificial Survival • Gymnastics Team Ranked First in Nation • Fourth Time\u27s the Charm • Gaining Ground in the Ranks of the Collegiate Wrestling Worldhttps://digitalcommons.ursinus.edu/grizzlynews/1576/thumbnail.jp

The Grizzly, February 17, 2005

UC Students Tour Washington D.C. to Prepare for Model UN • Wismer Music Makes a Comeback • Problems with New Member Education • Ursinus Students Sprint into SPINT Housing • Leaders Wanted: Do You Have What it Takes? • Sexual Physical Fitness • Dramaturgy: New Course for Theater • Philadelphia Gets Closer for Ursinus Students • Opinions: Speak Up, It\u27s Your Right; God in the Government: Can we Escape Him?; What Rules the Media, Entertainment or Information? • Track and Field Team Headed in Right Direction • Lady Bears Dominate Bryn Mawr • Murray Helps Wrestling Team Remain Undefeatedhttps://digitalcommons.ursinus.edu/grizzlynews/1578/thumbnail.jp

The Grizzly, April 7, 2005

The Kaleidoscope to open 4/21 • Academic Awards Ceremony • Edible Book Festival a Delicious Success • Class Trip to Mississippi Revisits the Civil Rights Movement and Transforms Students • The Week that Almost Wasn\u27t Greek • Professors Yearn for Childcare • Major Highlight: Politics Department • New Diner Will Get Old Fast • Pleasure in Honesty • Opinions: Fighting Inner City Violence: Where is the Love?; Importance of a Living Will; Beer or Wine: What is Your Choice?; Wismer Woes • Evans Breaks 100m Record at Quaker Invitational • Men\u27s Lacrosse Team Plays Tough in Losing Cause • Slow Start for the Men\u27s Baseball Teamhttps://digitalcommons.ursinus.edu/grizzlynews/1582/thumbnail.jp

Conserved genes underlie phenotypic plasticity in an incipiently social bee

Despite a strong history of theoretical work on the mechanisms of social evolution, relatively little is known of the molecular genetic changes that accompany transitions from solitary to eusocial forms. Here we provide the first genome of an incipiently social bee that shows both solitary and social colony organization in sympatry, the Australian carpenter bee Ceratina australensis. Through comparative analysis, we provide support for the role of conserved genes and cis-regulation of gene expression in the phenotypic plasticity observed in nest-sharing, a rudimentary form of sociality. Additionally, we find that these conserved genes are associated with caste differences in advanced eusocial species, suggesting these types of mechanisms could pave the molecular pathway from solitary to eusocial living. Genes associated with social nesting in this species show signatures of being deeply conserved, in contrast to previous studies in other bees showing novel and faster-evolving genes are associated with derived sociality. Our data provide support for the idea that the earliest social transitions are driven by changes in gene regulation of deeply conserved genes

Trophic Ecology of Atlantic Bluefin Tuna (Thunnus thynnus) Larvae from the Gulf of Mexico and NW Mediterranean Spawning Grounds: A Comparative Stable Isotope Study

The present study uses stable isotopes of nitrogen and carbon (δ15Nandδ13C) as trophic indicators for Atlantic bluefin tuna larvae (BFT) (6–10mm standard length) in the highly contrasting environmental conditions of the Gulf of Mexico (GOM) and the Balearic Sea (MED). These regions are differentiated by their temperature regime and relative productivity, with the GOM being significantly warmer and more productive. MED BFT larvae showed the highest δ15N signatures, implying an elevated trophic position above the underlyingmicrozooplankton baseline. Ontogenetic dietary shifts were observed in the BFT larvae from the GOM and MED which indicates early life trophodynamics differences between these spawning habitats. Significant trophic differences between the GOM and MED larvae were observed in relation to δ15N signatures in favour of the MED larvae, which may have important implications in their growth during their early life stages. These low δ15N levels in the zooplankton from the GOM may be an indication of a shifting isotopic baseline in pelagic food webs due to diatrophic inputs by cyanobacteria. Lack of enrichment for δ15N in BFT larvae compared to zooplankton implies an alternative grazing pathway from the traditional food chain of phytoplankton— zooplankton—larval fish. Results provide insight for a comparative characterization of the trophic pathways variability of the two main spawning grounds for BFT larvaeVersión del editor4,411