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- Title
- Artificial reef morphology: Relationship to fish recruitment and community structure.
- Creator
- Lea, Barbara Chudzik, Florida Atlantic University, Courtenay, Walter R. Jr., Bourne, Godfrey R., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Rock and coral reef fishes are known to select their habitat, and selection oftentimes involves the settlement of pelagic larval stages. Thus, I examined the short-term temporal relationship between artificial reef morphology and the composition of warm-water reef fish assemblages 30 m offshore of the Town of Palm Beach, Florida. Correlations were found between reef height and total fish abundance and species richness. Reef height was also correlated with log transformed numbers of juveniles....
Show moreRock and coral reef fishes are known to select their habitat, and selection oftentimes involves the settlement of pelagic larval stages. Thus, I examined the short-term temporal relationship between artificial reef morphology and the composition of warm-water reef fish assemblages 30 m offshore of the Town of Palm Beach, Florida. Correlations were found between reef height and total fish abundance and species richness. Reef height was also correlated with log transformed numbers of juveniles. Horizontal opening size showed an inverse correlation with species richness and a weak inverse trend with juvenile abundance. Furthermore, vertical openings were directly proportional to juvenile and total fish abundance, and to species richness. Piscivore abundance was weakly influenced by presence and dimensions of vertical crevices. Thus, artificial reefs with many varied-sized vertical crevices are most desirable for attracting juvenile warm-water reef fishes.
Show less - Date Issued
- 1994
- PURL
- http://purl.flvc.org/fcla/dt/15063
- Subject Headings
- Artificial reefs, Coral reef fishes--Morphology
- Format
- Document (PDF)
- Title
- Comparison of the Growth and Structure of the Pseudobranchs of Two Carangid Fishes.
- Creator
- Koenig, Christopher C., Courtenay, Walter R. Jr., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
The growth and structure of the pseudobranchs of Trachinotus carolinus and Oligoplites saurus is described, illustrated, and discussed with respect to their histology and gross morphology. Morphological and histological differences between the pseudobranchs of the two species occur in the associated arteries, filament growth, mitochondrial form, and in the epithelium bordering the pseudobranchs. The pseudobranch of T. carolinus is contrasted with a typical carangid pseudobranch, characterized...
Show moreThe growth and structure of the pseudobranchs of Trachinotus carolinus and Oligoplites saurus is described, illustrated, and discussed with respect to their histology and gross morphology. Morphological and histological differences between the pseudobranchs of the two species occur in the associated arteries, filament growth, mitochondrial form, and in the epithelium bordering the pseudobranchs. The pseudobranch of T. carolinus is contrasted with a typical carangid pseudobranch, characterized by O. saurus is thick and heavily vascularized and shows a tendency to atrophy with growth of the fish. The results of bilateral pseudobranchectomy differed between adults and juveniles. All the fish became blind; however, only the adults displayed buoyancy problems and permanent chromatophore expansion.
Show less - Date Issued
- 1969
- PURL
- http://purl.flvc.org/fau/fd/FA00000781
- Subject Headings
- Carangidae--Anatomy, Florida pompano--Anatomy
- Format
- Document (PDF)
- Title
- EASTERN PACIFIC FISHES OF THE GENUS HAEMULON (POMADASYIDAE).
- Creator
- HONG, SUSAN LEE, Florida Atlantic University, Courtenay, Walter R. Jr., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Five eastern Pacific species of the genus Haemulon Cuvier are described, their color pattern and dentition illustrated, and a key presented for their identification. Lythrulon Jordan and Swain and Orthostoechus Gill are synonymized with Haemulon. Haemulon scudderi Gill, Haemulon sexfasciatum Gill, Haemulon flavigattatum Gill, and Haemulon maculicauda (Gill) are found exclusively in the Pacific while Haemulon steindachneri (Jordan and Gilbert) is found both in the Atlantic and the Pacific.
- Date Issued
- 1974
- PURL
- http://purl.flvc.org/fcla/dt/13676
- Subject Headings
- Grunts (Fishes)
- Format
- Document (PDF)
- Title
- HABITAT PREFERENCES AND ASSOCIATIONS OF A UNISEXUAL-BISEXUAL COMPLEX OF POECILIA (PISCES: POECILIIDAE) FROM NORTHEASTERN MEXICO.
- Creator
- KUCHARSKI, KRISTINE MARIE., Florida Atlantic University, Courtenay, Walter R. Jr., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Two gynogenetically reproducing unisexuals, the diploid Poecilia formosa and its associated triploid are sympatric to P. mexicana, a bisexual species, in northeastern Mexico. All compete for sperm from P. mexicana males. Field and laboratory experiments studied habitat. preferences and associations as mechanisms of reducing competition. A new tagging method was developed. Laboratory results (Phase One) indicated habitat preferences of each female type. Further studies (Phase Two) showed the...
Show moreTwo gynogenetically reproducing unisexuals, the diploid Poecilia formosa and its associated triploid are sympatric to P. mexicana, a bisexual species, in northeastern Mexico. All compete for sperm from P. mexicana males. Field and laboratory experiments studied habitat. preferences and associations as mechanisms of reducing competition. A new tagging method was developed. Laboratory results (Phase One) indicated habitat preferences of each female type. Further studies (Phase Two) showed the fishes remained together but each female type associated with its own kind. Shade and a gravel substrate were important habitat parameters. Specific habitat preferences may not be adaptive due to seasonal water fluctuations but there are different ecological preferences by each female type. Associations could account for Phase One laboratory results and ecological differences. Combined data indicate associations are the likely mechanism, but habitat preferences are possible. Seasonal factors and artificial conditions may have caused diverse results.
Show less - Date Issued
- 1979
- PURL
- http://purl.flvc.org/fcla/dt/13960
- Subject Headings
- Ichthyology--Research
- Format
- Document (PDF)
- Title
- LARVAL DEVELOPMENT OF THE SNOOK, CENTROPOMUS UNDECIMALIS (PISCES: CENTROPOMIDAE), REARED IN THE LABORATORY.
- Creator
- LAU, STEPHEN R., Florida Atlantic University, Courtenay, Walter R. Jr., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Advanced embryos, larval and early juvenile snook, Centropomus undecimalis, are described from laboratory reared specimens. This description includes details of advanced embryos, changes in body shape, pigmentation, and osteological development. Eggs ranged from 0.68 to 0.73 mm in diameter with a single oil globule. Larvae were between 1.4 and 1.5 mm standard length at hatching. The yolk sac was absorbed by 2.2 mm and adult pigmentation began to appear on the head and fins by 7.0 mm....
Show moreAdvanced embryos, larval and early juvenile snook, Centropomus undecimalis, are described from laboratory reared specimens. This description includes details of advanced embryos, changes in body shape, pigmentation, and osteological development. Eggs ranged from 0.68 to 0.73 mm in diameter with a single oil globule. Larvae were between 1.4 and 1.5 mm standard length at hatching. The yolk sac was absorbed by 2.2 mm and adult pigmentation began to appear on the head and fins by 7.0 mm. Ossification had commenced by 5.5 mm and all bones, except the ethmoid and preyomer, had at least begun to ossify by 21.9 mm. Illustrations of snook eggs and larvae, including details of the caudal skeleton, are presented to show changes that occurred during development.
Show less - Date Issued
- 1977
- PURL
- http://purl.flvc.org/fcla/dt/13894
- Subject Headings
- Centropomidae
- Format
- Document (PDF)
- Title
- A SURVEY OF THE FISH FAUNA IN THE SHALLOW MARINE WATERS OF CLAM LAGOON, ADAK, ALASKA.
- Creator
- HANCOCK, MAX JAY., Florida Atlantic University, Courtenay, Walter R. Jr., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
A seasonal sampling of fishes was collected by seine from the sand-gravel areas of Clam Lagoon, Adak, Alaska. The community structure was compared to the structure of communities described from surveys of other areas. The seasonality of the fish fauna was examined for possible relationships with three exogenous factors; salinity, temperature and wind velocity. Length frequency histograms and substrate preferences are presented for seven species. The shallow-water seasonality of 13 species is...
Show moreA seasonal sampling of fishes was collected by seine from the sand-gravel areas of Clam Lagoon, Adak, Alaska. The community structure was compared to the structure of communities described from surveys of other areas. The seasonality of the fish fauna was examined for possible relationships with three exogenous factors; salinity, temperature and wind velocity. Length frequency histograms and substrate preferences are presented for seven species. The shallow-water seasonality of 13 species is presented. The ontogenetic and seasonal diets of seven species are discussed.
Show less - Date Issued
- 1975
- PURL
- http://purl.flvc.org/fcla/dt/13711
- Subject Headings
- Fish populations--Alaska--Clam Lagoon, Adak
- Format
- Document (PDF)
- Title
- THERMALLY INDUCED VARIATIONS IN VERTEBRAL NUMBER IN LUCANIA PARVA BAIRD (ANTHERINIFORMES: CYPRINODONTIDAE) REARED IN THE LABORATORY.
- Creator
- MCCARTHY, LINDA J., Florida Atlantic University, Courtenay, Walter R. Jr., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Embryos of Lucania parva Baird from two sites in the Florida Keys were raised in four temperature regimes, 18°, 22°, 26°, and 30°C to determine the response of vertebral numbers to different incubation temperatures. The result was in inverse linear relationship, with vertebral numbers increasing with decreasing temperature. Temperature modified the developmental rates, causing the embryos in the warm temperatures to hatch earlier than those in the cold temperatures.
- Date Issued
- 1978
- PURL
- http://purl.flvc.org/fcla/dt/13951
- Subject Headings
- Biology, Zoology
- Format
- Document (PDF)