Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Entire DC Network
Genetic Effects Influencing Salinity And Cold Tolerance In Tilapia, Alvaro M. Armas-Rosales
Genetic Effects Influencing Salinity And Cold Tolerance In Tilapia, Alvaro M. Armas-Rosales
LSU Master's Theses
Genetic effects influencing salinity tolerance (ST) and cold tolerance (CT) were evaluated in two full diallel mating designs using six tilapia varieties: Oreochromis aureus (BL), O. mossambicus (MO), O. niloticus (NI), O. niloticus crossbreds (RE), Mississippi commercial strain (MC) and Florida red tilapia (FL). Statistical analyses provided estimates of direct heterosis (hi), cross heterosis (hij), maternal effects (mi), line effects (li), reciprocal and specific reciprocal effects (rij and r**ij), and general and specific combining abilities (GCA and Sij). Analysis of genetic effects for ST indicated that FL …
Distribution And Biogeography Of Central American Howling Monkeys (Alouatta Pigra And A. Palliata), Amrei Baumgarten
Distribution And Biogeography Of Central American Howling Monkeys (Alouatta Pigra And A. Palliata), Amrei Baumgarten
LSU Master's Theses
Central America has two howling monkey species: the widespread mantled howling monkey (Alouatta palliata) and the endemic and endangered black howling monkey (A. pigra) limited to southeastern Mexico, northern Guatemala and Belize. Studies that verify the distribution of these species are needed, especially in their contact zones where sympatry is reported. Their evolutionary history remains controversial. My study examines their distribution at a local scale in a potential contact zone in eastern Guatemala through direct observations and interviews and at a regional scale across the entire isthmus using data from museum specimen localities, study sites, historic records and field surveys. …