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Full-Text Articles in Life Sciences
Red-Bellied Woodpecker Predation On Nestling House Wrens, Given Harper, Andrew Neill
Red-Bellied Woodpecker Predation On Nestling House Wrens, Given Harper, Andrew Neill
Scholarship
No abstract provided.
Larval Settlement Of Ilyanassa Obsoleta (Gastropoda) And Capitella Sp. I (Polychaeta): Responses To Sediment Cues And Effects Of No. 6 Fuel Oil, Dianne Rudy '90
Larval Settlement Of Ilyanassa Obsoleta (Gastropoda) And Capitella Sp. I (Polychaeta): Responses To Sediment Cues And Effects Of No. 6 Fuel Oil, Dianne Rudy '90
Honors Projects
Metamorphosis in response to bottom sediment was measured in two species of marine planktonic larvae. Ilyanassa obsoleta, a common mud-snail, and Capitella sp. I, a polychaete worm. A sediment control consisted of organic-rich sediment collected from Barnstable Harbor, Ma. One sediment treatment, termed muffled sediment, consisted of the sediment control heated at a high temperature in a muffle oven to remove all organic matter. A sharp decrease in percent metamorphosis was observed in larvae exposed to the muffled sediment condition compared to the sediment control. Results confirmed that settlement involves more than physical contact with the sediment and suggest that …
Effect Of Copulation And Copulation Time On Female Reproductive Development In Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae), David Sherwood '90
Effect Of Copulation And Copulation Time On Female Reproductive Development In Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae), David Sherwood '90
Honors Projects
It has been established that a prolonged copulatory period of 3-4 hours is necessary for maximal insemination to occur in the western corn rootworn (WCR). This complete mating period has been suggested to speed ovarian development. The purpose of this study was to determine the relationship between copulation and ovarian development in the WCR. Using 11 and 12 day postemergence virgin WCR beetles, four female groups of varying copulatory duration were established: (1) 15 min. in copula (2) 1 hr. in copula (3) 2 hrs. in copula (4) a control group mated until natural completion. After copulation, these beetles along …
The Effects Of Intracerebral Injections Of Substance P, And A Substance P Fragment (5-11) Into The Medial Preoptic Nucleus On Lordosis Behavior In The Female Rat, Kellie S. Jones '90
The Effects Of Intracerebral Injections Of Substance P, And A Substance P Fragment (5-11) Into The Medial Preoptic Nucleus On Lordosis Behavior In The Female Rat, Kellie S. Jones '90
Honors Projects
In this study either substance P (SP), SP 5-11, an analogue resistant to enzymatic degradation, or acidified saline was injected bilaterally into the medial preoptic nucleus (MPN) of the medial preoptic area (MPOA) in ovariectomized (ovx) estrogen-primed female rats. The lordosis quotient (LQ) and the lordosis intensity scale (LIS) were recorded using a steroid regime that produced a slow increase of sexual receptivity. In experiment 1, when receptivity was low, bilateral injections of 2 different doses of SP (100 ng,1000 ng/ cannula), had no effect on lordosis behavior when compared to those injected with acidified saline. In experiment , however, …
Systematic Relationships Of Rhinolophid Bats: Based On Hyoid Morphology, Andrea L. Smith '90
Systematic Relationships Of Rhinolophid Bats: Based On Hyoid Morphology, Andrea L. Smith '90
Honors Projects
The hyoid regions of three species of bats within the family Rhinolophidae were dissected and compared with similar data of the hyoid region of other families obtained from Griffiths (personal communication). A cladistic analysis was performed using these data to analyze inter-generic relationships within the Rhinolophidae and inter-familial relationships between the families Rhinolophidae, Megadermatidae, Nycteridae, Rhinopomatidae and Emballonuridae. Two possible inter-generic cladograms are most parsimonious. Within the rhinolophids, either Hipposideros diadema or Hipposideros armiger is the most distantly related species depending on which of two characters, loss of the sphincter colli or loss of the omohyoid, has undergone convergent evolution. …