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Theses/Dissertations

Dissertations, Theses, and Masters Projects

1995

Ecology and Evolutionary Biology

Articles 1 - 7 of 7

Full-Text Articles in Life Sciences

Spawning And Ecology Of Early Life Stages Of Black Drum, Pogonias Cormis, In Lower Chesapeake Bay, Louis Broaddus Daniel Iii Jan 1995

Spawning And Ecology Of Early Life Stages Of Black Drum, Pogonias Cormis, In Lower Chesapeake Bay, Louis Broaddus Daniel Iii

Dissertations, Theses, and Masters Projects

During spring 1990 and 1991, ichthyoplankton surveys were conducted in lower Chesapeake Bay to estimate seasonal egg production, population biomass and the impact of predation by gelatinous zooplankton on early life stages of black drum, Pogonias cromis. Rearing experiments indicated that at least three species of sciaenid (silver perch, Bairdiella chrysoura; weakfish, Cynoscion regalis and P. cromis) were spawning in the survey area during both years. Specific identification of eggs based on previously published ranges of outside egg diameter (OED) were not reliable due to considerable overlap in diameter distributions. Analysis of weekly OED frequency revealed the presence of three ...


Reproductive And Feeding Biology Of Selected Syngnathids (Pisces: Teleostei) Of The Western Atlantic, Rogerio Luiz Teixeira Jan 1995

Reproductive And Feeding Biology Of Selected Syngnathids (Pisces: Teleostei) Of The Western Atlantic, Rogerio Luiz Teixeira

Dissertations, Theses, and Masters Projects

The reproductive and feeding biology of five syngnathid species of the western Atlantic were studied: the pipefishes Syngnathus fuscus, S. floridae, the lined seahorse Hippocampus erectus of Chesapeake Bay; and the pipefishes S. folletti and Oostethus lineatus, from southern and southeast Brazil, respectively. Male syngnathids incubate eggs received from females in a ventral brood pouch, females do not play any additional role in parental care after mating. This natural sex role reversal is a unique characteristic that all male syngnathids have. In other fishes, parental care is usually a female prerogative. Most pipefishes are polygamous, while seahorses are monogamous. Syngnathus ...


Effects Of Substrate On Hatching Success In Black Skimmers, Rynchops Niger, At The Hampton Roads Bridge-Tunnel, Hampton, Virginia, Crystal Dawn Matthews Jan 1995

Effects Of Substrate On Hatching Success In Black Skimmers, Rynchops Niger, At The Hampton Roads Bridge-Tunnel, Hampton, Virginia, Crystal Dawn Matthews

Dissertations, Theses, and Masters Projects

No abstract provided.


Finfish Communities Of Two Intertidal Marshes Of The Goodwin Islands, York River, Virginia, Lisa Ann Ayers Jan 1995

Finfish Communities Of Two Intertidal Marshes Of The Goodwin Islands, York River, Virginia, Lisa Ann Ayers

Dissertations, Theses, and Masters Projects

The finfish communities using the intertidal surfaces of a bay-exposed marsh and a sheltered, channel marsh of the Goodwin Islands, York River, Virginia were studied from May to November 1994. Samples were taken approximately twice monthly using a flume weir at three stations in each marsh. Species composition, abundance and biomass were estimated, and growth patterns and production rates were described for the dominant species. A total of 3001 fish were collected from 11 species and 8 families. Fundulus heteroclitus dominated both marshes and accounted for 83.07% of the total number of fish caught, and 84.83% of the ...


Movements And Ecology Of Summer Flounder, Paralichthys Dentatus, Tagged In The Southern Mid-Atlantic Bight, Joseph C. Desfosse Jan 1995

Movements And Ecology Of Summer Flounder, Paralichthys Dentatus, Tagged In The Southern Mid-Atlantic Bight, Joseph C. Desfosse

Dissertations, Theses, and Masters Projects

A total of 12,323 summer flounder were tagged and released in Chesapeake Bay, the coastal waters off Virginia Beach, and the Eastern Shore during 1987-89. Excluding immediate recaptures, a total of 675 were recaptured for an overall return rate of 5.5%. Returns from the commercial fishery (56.2%) outnumbered those from the recreational fishery (35.7%). The majority of returns (47.1%) came from either Virginia waters or areas to the south, while only 12.8% were from areas to the north of Virginia. offshore returns accounted for 8.5% of the total. Returns with insufficient location data ...


Tidepool Value As Foraging Patches For Breeding And Migrating Birds In Tidal Salt Marshes In The Lower Chesapeake Bay, Amanda Susan Allen Jan 1995

Tidepool Value As Foraging Patches For Breeding And Migrating Birds In Tidal Salt Marshes In The Lower Chesapeake Bay, Amanda Susan Allen

Dissertations, Theses, and Masters Projects

No abstract provided.


Determinants Of Great Blue Heron (Andea Herodias) Colony Size And Location Along The James And Chickahominy Rivers In Virginia, Kristine Elise Holoman Clements Jan 1995

Determinants Of Great Blue Heron (Andea Herodias) Colony Size And Location Along The James And Chickahominy Rivers In Virginia, Kristine Elise Holoman Clements

Dissertations, Theses, and Masters Projects

No abstract provided.