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Articles 1 - 9 of 9
Full-Text Articles in Life Sciences
Nodal Signaling Is Required For Closure Of The Anterior Neural Tube In Zebrafish, Allisan Aquilina-Beck, Kristine Ilagan, Qin Liu, Jennifer O. Liang
Nodal Signaling Is Required For Closure Of The Anterior Neural Tube In Zebrafish, Allisan Aquilina-Beck, Kristine Ilagan, Qin Liu, Jennifer O. Liang
Biology Faculty Research
Background: Nodals are secreted signaling proteins with many roles in vertebrate development. Here, we identify a new role for Nodal signaling in regulating closure of the rostral neural tube of zebrafish.
The Organizational Effects Of Oxytocin On The Central Expression Of Estrogen Receptor Alpha And Oxytocin In Adulthood, Kristin M. Kramer, Shigeto Yoshida, Eros Papademetriou, Bruce S. Cushing
The Organizational Effects Of Oxytocin On The Central Expression Of Estrogen Receptor Alpha And Oxytocin In Adulthood, Kristin M. Kramer, Shigeto Yoshida, Eros Papademetriou, Bruce S. Cushing
Biology Faculty Research
Background: Previous studies have demonstrated that neonatal manipulation of oxytocin (OT) has effects on the expression of estrogen receptor alpha (ER alpha) and the central production of oxytocin observed in juveniles ( at weaning, 21 days of age). The goal of this study was to determine whether the effects of neonatal manipulation of OT last into adulthood, and if the effects differ from those observed during the early postnatal period. On the first day of life, prairie voles ( Microtus ochrogaster) received one of three doses of OT (High, 3 mu g; Med, 0.3 mu g; Low, 0.03 mu g), …
Genomic And Expression Analysis Of Multiple Sry Loci From A Single Rattus Norvegicus Y Chromosome, Monte E. Turner, Carey Martin, Almir S. Martins, Jeffrey Dunmire, Joel Farkas, Daniel L. Ely, Amy Milsted
Genomic And Expression Analysis Of Multiple Sry Loci From A Single Rattus Norvegicus Y Chromosome, Monte E. Turner, Carey Martin, Almir S. Martins, Jeffrey Dunmire, Joel Farkas, Daniel L. Ely, Amy Milsted
Biology Faculty Research
Background: Sry is a gene known to be essential for testis determination but is also transcribed in adult male tissues. The laboratory rat, Rattus norvegicus, has multiple Y chromosome copies of Sry while most mammals have only a single copy. DNA sequence comparisons with other rodents with multiple Sry copies are inconsistent in divergence patterns and functionality of the multiple copies. To address hypotheses of divergence, gene conversion and functional constraints, we sequenced Sry loci from a single R. norvegicus Y chromosome from the Spontaneously Hypertensive Rat strain (SHR) and analyzed DNA sequences for homology among copies. Next, to determine …
Anatomy Of The Recurrent Coastal Sediment Plume In Lake Michigan And Its Impacts On Light Climate, Nutrients, And Plankton, Henry Vanderploeg, Thomas Johengen, Peter J. Lavrentyev, Changsheng Chen, G. A. Lang, M. A. Agy, M. H. Bundy, J. F. Cavaletto, B. J. Eadie, J. R. Liebig, G. S. Miller, S. A. Ruberg, M. J. Mccormick
Anatomy Of The Recurrent Coastal Sediment Plume In Lake Michigan And Its Impacts On Light Climate, Nutrients, And Plankton, Henry Vanderploeg, Thomas Johengen, Peter J. Lavrentyev, Changsheng Chen, G. A. Lang, M. A. Agy, M. H. Bundy, J. F. Cavaletto, B. J. Eadie, J. R. Liebig, G. S. Miller, S. A. Ruberg, M. J. Mccormick
Biology Faculty Research
As part of the Episodic Events Great Lakes Experiment, we sampled total suspended matter (TSM), light climate, nutrients, and plankton along cross-margin transects in southern Lake Michigan during February, March, and April 1998-2000 to capture conditions before, during, and after the occurrence of storm-driven recurrent coastal sediment plumes to define the anatomy of the resuspension events and get insights into their interactions with nutrients and plankton. Variability in timing and strength of winter storms among years led to different timing, intensity, and extent of plumes among years. TSM concentrations in the core of plumes varied between 15 and 30 mg …
Phylogenetic Analysis Of The Socioecology Of Neotomine-Peromyscine Rodents, M C. Kalcounis-Rueppell, David O. Ribble
Phylogenetic Analysis Of The Socioecology Of Neotomine-Peromyscine Rodents, M C. Kalcounis-Rueppell, David O. Ribble
Biology Faculty Research
This chapter focuses on the breeding systems of Neotomine-Peromyscine rodents. There are three specific objectives to this chapter. First, we describe the patterns for major Neotomine-Peromyscine clades using data collected from the literature (table 6.1). Second, we examine data from the literature on the following breeding behaviors: male spacing, female spacing, relative intersexual home range/territory size, paternal care, and juvenile dispersal patterns. We examine breeding behavior data in a phylogenetic framework to test if any phylogenetic patterns emerge in the observed variation in these breeding behaviors and if relationships occur among these behaviors. Third, we examine in a phylogenetic framework …
Racketed Tail Of The Male And Female Turquoise-Browed Motmot: Male But Not Female Tail Length Correlates With Pairing Success, Performance, And Reproductive Success, Troy G. Murphy
Biology Faculty Research
Both males and females of many avian species maintain elaborate plumage traits, and elaborate monomorphic plumage may convey adaptive benefits to one or both sexes as inter- or intraspecific signals. Both sexes of the turquoise-browed motmot (Eumomota superciliosa) are elaborately plumed with long racket-tipped tail. I investigated whether the racketed tail functions as a sexually selected signal in one or both sexes by testing the predictions that males and/or females with the largest tails have: (1) greater pairing success, (2) greater reproductive performance (clutch-initiation date, clutch size, and hatching success), and (3) greater reproductive success. Yearling males with …
Dishonest ‘Preemptive’ Pursuit-Deterrent Signal? Why The Turquoise-Browed Motmot Wags Its Tail Before Feeding Nestlings, Troy G. Murphy
Dishonest ‘Preemptive’ Pursuit-Deterrent Signal? Why The Turquoise-Browed Motmot Wags Its Tail Before Feeding Nestlings, Troy G. Murphy
Biology Faculty Research
Both sexes of the turquoise-browed motmot, Eumomota superciliosa, display their long-racketed tail in an exaggerated side-to-side wag display in two contexts. In the first, the wag display is performed in the presence of predators (predator-elicited wag display), and evidence supports the hypothesis that the signal functions as a pursuit-deterrent signal (Murphy 2006, Behavioral Ecology, 17, 547e553). In the second, the wag display is performed in the apparent absence of predators immediately before feeding nestlings (prefeeding wag display). I tested four hypotheses on the adaptive significance of the prefeeding wag display: (1) a dishonest, preemptive, pursuit-deterrent signal given in case predators …
Philornis Fasciventris (Wulp) (Diptera: Muscidae): Description Of The Male, Larva And Puparium, With Notes On Biology And Host Association, Marcia S. Couri, Troy G. Murphy, Richard Hoebeke
Philornis Fasciventris (Wulp) (Diptera: Muscidae): Description Of The Male, Larva And Puparium, With Notes On Biology And Host Association, Marcia S. Couri, Troy G. Murphy, Richard Hoebeke
Biology Faculty Research
The male, larva and puparium of Philornis fasciventris (Wulp) are described for the first time, as well as the larval habit and host association. The material was collected in Yucatan, Mexico in a nest of the turquoise-browed motmot, Eumomota superciliosa (Sandbach) (Coraciformes: Momotidae), first host record for this species. E. superciliosa is also a new host record for Philornis.
Lack Of Melanized Keratin And Barbs That Fall Off: How The Racketed Tail Of The Turquoise-Browed Motmot Eumomota Superciliosa Is Formed, Troy G. Murphy
Lack Of Melanized Keratin And Barbs That Fall Off: How The Racketed Tail Of The Turquoise-Browed Motmot Eumomota Superciliosa Is Formed, Troy G. Murphy
Biology Faculty Research
The racket-tipped tail of the motmots is uniquely shaped and its formation has attracted much attention. Barbs that grow along the wire of the motmot’s two central tail feathers are weakly attached and shed soon after development. The cause of the weak attachment of these barbs is unclear. I induced feather growth by plucking the central tail feathers from seven turquoise-browed motmots Eumomota superciliosa and then collected the regrown feathers before the barbs along the wire had fully shed. I compared the barb-rachis junction (petiole of the ramus) along the distal flag (the racket-tip of the tail) where barbs are …