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Aspects of the population ecology and life history of the co-occurring crabs Eurypanopeus depressus (Smith) and Eurypanopeus dissimilis (Benedict and Rathbun) (Crustacea:Decapoda:Xanthidae)
Title
Aspects of the population ecology and life history of the co-occurring crabs Eurypanopeus depressus (Smith) and Eurypanopeus dissimilis (Benedict and Rathbun) (Crustacea:Decapoda:Xanthidae).
Creator
Owen, Catherine Baylor, Florida Atlantic University, Dobkin, Sheldon
Abstract/Description
The xanthid crabs Eurypanopeus depressus and E. dissimilis co-occur among oysters on seawalls in southeastern Florida. Population dynamics and aspects of the life history of these two species were compared during a 1-year period, at two study sites. There were no interspecific differences in adult size for either sex. For both species, females were significantly more abundant than males. E. depressus was more abundant at one study site, E. dissimilis at the other. Ovigerous females were found...
Show moreThe xanthid crabs Eurypanopeus depressus and E. dissimilis co-occur among oysters on seawalls in southeastern Florida. Population dynamics and aspects of the life history of these two species were compared during a 1-year period, at two study sites. There were no interspecific differences in adult size for either sex. For both species, females were significantly more abundant than males. E. depressus was more abundant at one study site, E. dissimilis at the other. Ovigerous females were found year-round. Number of eggs per female of both species increased with increasing carapace width. Recruitment of young into the population occurred year-round.
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Date Issued
1990
PURL
http://purl.flvc.org/fcla/dt/14637
Subject Headings
Crustacea--Florida, Decapoda (Crustacea)--Florida, Xanthidae--Florida, Marine ecology--Florida
Format
Document (PDF)
Population structure and reproductive patterns of a southern Florida population of Palaemonetes paludosus (Gibbes) (Crustacea: Decapoda: Palaemonidae)
Title
Population structure and reproductive patterns of a southern Florida population of Palaemonetes paludosus (Gibbes) (Crustacea: Decapoda: Palaemonidae).
Creator
Clingerman, JoAnne Lynn., Florida Atlantic University, Dobkin, Sheldon
Abstract/Description
The grass shrimp, Palaemonetes paludosus, was studied during a two year period from a population in southern Florida. The shrimp exhibited significant deviations from an expected sex ratio of 1:1 in certain size classes. Males were found more frequently in small to intermediate size classes while females dominated the largest size classes. Recruitment was continuous and ovigerous females were found year-round. Clutch size increased with increasing carapace length of the shrimp. A differential...
Show moreThe grass shrimp, Palaemonetes paludosus, was studied during a two year period from a population in southern Florida. The shrimp exhibited significant deviations from an expected sex ratio of 1:1 in certain size classes. Males were found more frequently in small to intermediate size classes while females dominated the largest size classes. Recruitment was continuous and ovigerous females were found year-round. Clutch size increased with increasing carapace length of the shrimp. A differential growth rate may account for the variations in sex ratio among different size classes found in this shrimp.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15088
Subject Headings
Palaemonetes, Palaemonetes--Reproduction, Crustacea--Reproduction, Shrimps--Reproduction
Format
Document (PDF)
effect of feeding on repopulation of the sea anemone Aiptasia pallida by symbiotic dinoflagellates (zooxanthellae)
Title
The effect of feeding on repopulation of the sea anemone Aiptasia pallida by symbiotic dinoflagellates (zooxanthellae).
Creator
Flinn, Randa N., Florida Atlantic University, Dobkin, Sheldon, Cook, Clayton B.
Abstract/Description
Many marine organisms possess endosymbiotic dinoflagellates called zooxanthellae. Bleaching is the loss of zooxanthellae, but bleached hosts can be repopulated. Little is known about how repopulation is controlled. The sea anemone Aiptasia pallida was used to study the effects of feeding on repopulation. Two groups of aposymbiotic anemones were reinfected with algae from symbiotic clones. One group was fed and the other starved, and counts of algae within each anemone were made at 3 day...
Show moreMany marine organisms possess endosymbiotic dinoflagellates called zooxanthellae. Bleaching is the loss of zooxanthellae, but bleached hosts can be repopulated. Little is known about how repopulation is controlled. The sea anemone Aiptasia pallida was used to study the effects of feeding on repopulation. Two groups of aposymbiotic anemones were reinfected with algae from symbiotic clones. One group was fed and the other starved, and counts of algae within each anemone were made at 3 day intervals for 6 weeks. The experiment was repeated, and results showed that the rate of algal growth did not differ between fed and starved groups. However, starved anemones reached plateau more quickly and lost algal cells after plateau was reached, whereas fed anemones contained more algae and protein. This suggests that starved anemones can support an algal population initially, but cannot maintain it. Space and nutrients are implicated in having a limiting effect on maintenance of symbionts.
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Date Issued
1997
PURL
http://purl.flvc.org/fcla/dt/15495
Subject Headings
Sea anemones, Dinoflagellates, Zooxanthellales
Format
Document (PDF)
LARVAL DEVELOPMENT OF THE SARGASSUM SHRIMPS LEANDER TENUICORNIS (SAY) (PALAEMONIDAE) AND LATREUTES FUCORUM (FABRICIUS) (HIPPOLYTIDAE) REARED IN THE LABORATORY
Title
THE LARVAL DEVELOPMENT OF THE SARGASSUM SHRIMPS LEANDER TENUICORNIS (SAY) (PALAEMONIDAE) AND LATREUTES FUCORUM (FABRICIUS) (HIPPOLYTIDAE) REARED IN THE LABORATORY.
Creator
BAILEY, DOUGLAS JAMES., Florida Atlantic University, Dobkin, Sheldon
Abstract/Description
Leander tenuicornis (Say) and Latreutes fucorum (Fabricius) are two caridean shrimps abundant on floating sargassum. The ovigerous females were captured offshore of Dade and Broward Counties in southern Florida. Larvae were reared in a recirculating system and in plastic compartmented trays in sea water of 35 parts per thousand at 24-30°C. The larval development of Latreutes fucorum is comprised of nine morphological stages and has a duration between 18 and 30 days in the laboratory. Larval...
Show moreLeander tenuicornis (Say) and Latreutes fucorum (Fabricius) are two caridean shrimps abundant on floating sargassum. The ovigerous females were captured offshore of Dade and Broward Counties in southern Florida. Larvae were reared in a recirculating system and in plastic compartmented trays in sea water of 35 parts per thousand at 24-30°C. The larval development of Latreutes fucorum is comprised of nine morphological stages and has a duration between 18 and 30 days in the laboratory. Larval and postlarval stages of this species are described. The larval development of Leander tenuicornis is comprised of eight morphological stages. These are described and compared to larvae of other members of the genus descr-ibed as well as other previously described specimens of L. tenuicornis. Distinctions between larvae of L. tenuicornis and those of other members of the genus in addition to peculiarities shown by the adult, are sufficient to suggest the erection of a new genus to include this form.
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Date Issued
1980
PURL
http://purl.flvc.org/fcla/dt/14007
Subject Headings
Shrimps--Development
Format
Document (PDF)
Some Aspects of the Ecology of the Reefs of Palm Beach County, Florida, with Emphasis on the Gogonacea and their Bathymetric Distribution
Title
Some Aspects of the Ecology of the Reefs of Palm Beach County, Florida, with Emphasis on the Gogonacea and their Bathymetric Distribution.
Creator
Goldberg, Walter M., Dobkin, Sheldon, Florida Atlantic University
Abstract/Description
This paper presents data relative to the ecology and bathymetric distribution of hermatypic gorgonians. The reefs were analyzed with respect to faunal composition and zonation. Ecological data such as turbidity, light penetration, salinity, dissolved oxygen and temperature were taken directly on the reefs. The main reef was carbondated (C^14 ) to determine the length of time required for development. Gorgonians were transplanted from 9 meters to 18 and 30 meters to observe growth rates and...
Show moreThis paper presents data relative to the ecology and bathymetric distribution of hermatypic gorgonians. The reefs were analyzed with respect to faunal composition and zonation. Ecological data such as turbidity, light penetration, salinity, dissolved oxygen and temperature were taken directly on the reefs. The main reef was carbondated (C^14 ) to determine the length of time required for development. Gorgonians were transplanted from 9 meters to 18 and 30 meters to observe growth rates and spicule changes. The relationships of zooxanthellae to the hermatypic Gorgonacea were analyzed and discussed. Experiments were conducted concerning respiration and photosynthetic rates, minimum oxygen tolerance, compensation intensities and depth, and starvation in the light as well as in the dark. Tolerance limits were establIshed for various levels of salinity, and temperature. Feeding behavior experiments were recorded and the relationship of gorgonian populations to the reef structure and community were discussed.
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Date Issued
1970
PURL
http://purl.flvc.org/fau/fd/FA00000770
Subject Headings
Reefs--Florida--Palm Beach County, Alcyonacea
Format
Document (PDF)