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Full-Text Articles in Biology
Age, Growth, And Movement Patterns Of The Atlantic Stingray, Dasyatis Sabina, In A Florida Coastal Lagoon System, Thomas Henry Schmid
Age, Growth, And Movement Patterns Of The Atlantic Stingray, Dasyatis Sabina, In A Florida Coastal Lagoon System, Thomas Henry Schmid
Retrospective Theses and Dissertations
Age, growth rates, and patterns of movement were studied in the Atlantic stingray, Dasyatis sabina, in the Indian River lagoon system in east central Florida. Age was estimated using the growth rings on the vertebral centrum and tretacycline marking. Tetracycline injections produced clear readable rings in all pups, but failed to be incorporated into the centra of adults. Females possess more centrum rings than males, but annual periodicity could not be verified. Growth rates were determined from aquarium held pups and adults and from tagged and recaptured animals. Males appeared to reach maturity in about two years, females in slightly …
Evaluation Of Inversion Uab1, A Bithorax-Complex Mutant, Gerhild Rathmann Packert
Evaluation Of Inversion Uab1, A Bithorax-Complex Mutant, Gerhild Rathmann Packert
Retrospective Theses and Dissertations
No abstract provided.
Variation In Female Somatic Condition And Its Relationship To Reproduction In The Sailfin Molly, Poecilia Latipinna (Pisces: Poeciliidae), Richard Eugene Smith
Variation In Female Somatic Condition And Its Relationship To Reproduction In The Sailfin Molly, Poecilia Latipinna (Pisces: Poeciliidae), Richard Eugene Smith
Retrospective Theses and Dissertations
Seasonal and gestational variation in the somatic and reproductive condition of females was determined for two east-central Florida populations of the livebearing fish Poecilia latipinna. Females were sampled monthly between January 1985 and January 1986 at Badge Station (BDGST) and Titusville Ditch (TDTCH) study sites. In addition, collections were made at approximately 8 day intervals in April and August. Somatic condition was determined by calculating index values for dry weight (somatic tissue minus water), lipid, and protein from overall regression equations relating these components to female body size. Significant seasonal variation in somatic condition existed within the two study sites. …