Current Search:  Spectral sensitivity (x)

View All Items

  • CSV Spreadsheet
(1 - 9 of 9)
Spectral sensitivity, visual pigments and screening pigments in two life history stages ofthe ontogenetic migrator Gnathophausia ingens
Title
Spectral sensitivity, visual pigments and screening pigments in two life history stages ofthe ontogenetic migrator Gnathophausia ingens.
Creator
Frank, Tamara M., Porter, Megan, Cronin, Thomas W., Harbor Branch Oceanographic Institute
Date Issued
2009
PURL
http://purl.flvc.org/fau/fd/FA00007247
Subject Headings
Crustacea, Spectral sensitivity, Visual pigments, Spectral sensitivity--Measurement
Format
Document (PDF)
Visual wavelength discrimination by the loggerhead turtle, Caretta caretta
Title
Visual wavelength discrimination by the loggerhead turtle, Caretta caretta.
Creator
Young, Morgan, Salmon, Michael, Forward, Richard B., Jr., Graduate College
Date Issued
2011-04-08
PURL
http://purl.flvc.org/fcla/dt/3164729
Subject Headings
Loggerhead turtle, Spectral sensitivity, Phototaxis
Format
Document (PDF)
Spectral sensitivity of vision and bioluminescence in the midwater shrimp Sergestes similis
Title
Spectral sensitivity of vision and bioluminescence in the midwater shrimp Sergestes similis.
Creator
Lindsay, S. M., Frank, Tamara M., Kent, J., Partridge, Julian C., Latz, M. I., Harbor Branch Oceanographic Institute
Date Issued
1999
PURL
http://purl.flvc.org/FCLA/DT/3171571
Subject Headings
Shrimps, Spectral sensitivity, Bioluminescence, Luminescent probes, Microspectrophotometry
Format
Document (PDF)
Temporal resolution and spectral sensitivity of the visual system of three coastal shark speciesfrom different light environments
Title
Temporal resolution and spectral sensitivity of the visual system of three coastal shark speciesfrom different light environments.
Creator
McComb, Dawn Michelle, Frank, Tamara M., Hueter, R. E., Kajiura, Stephen M., Harbor Branch Oceanographic Institute
Date Issued
2010
PURL
http://purl.flvc.org/fau/fd/FA00007091
Subject Headings
Sharks, Visual system, Spectral sensitivity, Night Vision
Format
Document (PDF)
EVIDENCE FOR THE INDEPENDENT EVOLUTION OF VISUAL PERCEPTION DURING SEAFINDING BY HATCHLING LEATHERBACK SEA TURTLES (DERMOCHELYS CORIACEA)
Title
EVIDENCE FOR THE INDEPENDENT EVOLUTION OF VISUAL PERCEPTION DURING SEAFINDING BY HATCHLING LEATHERBACK SEA TURTLES (DERMOCHELYS CORIACEA).
Creator
Trail, Samantha E., Salmon, Michael, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
Abstract/Description
Hatchling marine turtles exhibit a positive phototaxis by crawling toward the lowest and brightest horizon when they emerge from nests on the beach at night, which should lead them to the ocean (“seafinding”). Previous research with cheloniid (loggerhead and green turtle) hatchlings demonstrated that the perceptual spectral sensitivities are well below the light available on the beach regardless of lunar phase. The goal of this research was to determine the perceptual spectral sensitivities...
Show moreHatchling marine turtles exhibit a positive phototaxis by crawling toward the lowest and brightest horizon when they emerge from nests on the beach at night, which should lead them to the ocean (“seafinding”). Previous research with cheloniid (loggerhead and green turtle) hatchlings demonstrated that the perceptual spectral sensitivities are well below the light available on the beach regardless of lunar phase. The goal of this research was to determine the perceptual spectral sensitivities of leatherback hatchlings, the most distantly related of all extant sea turtle species. This study revealed that, like cheloniids, leatherbacks are most sensitive to shorter wavelengths (< 500 nm). However, leatherbacks were 10 – 100x less sensitive than cheloniids at all tested wavelengths. This difference in sensitivity corresponds with increased crawl duration and circling behavior under new moon conditions when light levels are lowest and the difference in radiance between the landward and seaward direction is small.
Show less
Date Issued
2021
PURL
http://purl.flvc.org/fau/fd/FA00013790
Subject Headings
Leatherback turtle, Dermochelys coriacea, Phototaxis, Spectral sensitivity
Format
Document (PDF)
Visual spectral sensitivity of loggerhead (Caretta caretta L.) and leatherback (Dermochelys coriacea L.) hatchlings: A comparative study
Title
Visual spectral sensitivity of loggerhead (Caretta caretta L.) and leatherback (Dermochelys coriacea L.) hatchlings: A comparative study.
Creator
Gocke, Judith P., Florida Atlantic University, Salmon, Michael
Abstract/Description
In the ocean, lighting varies with habitat; the eye's spectral sensitivity must vary with visual ecology. Green turtles are the only sea turtle whose spectral sensitivity has been studied. Loggerheads and leatherbacks see visible light between 340 and 700 nm. However, the wavelengths detected with the greatest sensitivity by both species are those best transmitted at the specific depths where food, mates and predators are likely to be encountered. Both species have trichromatic vision, but...
Show moreIn the ocean, lighting varies with habitat; the eye's spectral sensitivity must vary with visual ecology. Green turtles are the only sea turtle whose spectral sensitivity has been studied. Loggerheads and leatherbacks see visible light between 340 and 700 nm. However, the wavelengths detected with the greatest sensitivity by both species are those best transmitted at the specific depths where food, mates and predators are likely to be encountered. Both species have trichromatic vision, but the species differ in the concentration and peak sensitivity of each visual pigment resulting in either a broadly tuned (loggerhead) or finely tuned (leatherback) spectral sensitivity. Spectral sensitivity of leatherbacks overlaps both bioluminescence of prey, and light available in clear, deep, oceanic waters.
Show less
Date Issued
2003
PURL
http://purl.flvc.org/fcla/dt/13029
Subject Headings
Loggerhead turtle, Leatherback turtle, Spectral sensitivity
Format
Document (PDF)
Visual Adaptations in Crustaceans: Chromatic, Developmental, and Temporal Aspects
Title
Visual Adaptations in Crustaceans: Chromatic, Developmental, and Temporal Aspects.
Creator
Marshall, N. Justin, Cronin, Thomas W., Frank, Tamara M., Harbor Branch Oceanographic Institute
Date Issued
2003
PURL
http://purl.flvc.org/FCLA/DT/3172824
Subject Headings
Crustacea, Crustacea --Development, Spectral sensitivity, Photoreceptors --Physiology, Bioluminescence
Format
Document (PDF)
Visual Adaptations of Ontogenetically Migrating Deep-Sea Crustaceans
Title
Visual Adaptations of Ontogenetically Migrating Deep-Sea Crustaceans.
Creator
Whitehill, Elizabeth A. G., Frank, Tamara M., Florida Atlantic University
Abstract/Description
Species that are ontogenetic migrators have early life stages (juveniles) that live shallower in the water column than the adults and therefore experience a brighter environment than the adults. This work provides evidence that juveniles and adults of the ontogenetically migrating crustacean species Gnathophausia ingens, Oplophorus gracilirostris, and Systellaspis debilis have evolved visual adaptations to their respective environments. The juveniles use apposition optics that provide greater...
Show moreSpecies that are ontogenetic migrators have early life stages (juveniles) that live shallower in the water column than the adults and therefore experience a brighter environment than the adults. This work provides evidence that juveniles and adults of the ontogenetically migrating crustacean species Gnathophausia ingens, Oplophorus gracilirostris, and Systellaspis debilis have evolved visual adaptations to their respective environments. The juveniles use apposition optics that provide greater resolution, whereas the adults use superposition optics that maximize sensitivity. These animals also have regional specializations to aid in viewing a light field that is brighter above than below, such as accessory screening pigments located dorsally and superposition type optics ventrally. The non-ontogenetic migrators Notostomus elegans and Notostomus gibbosus possess superposition optics as both juveniles and adults, implying that the changes seen in ontogenetic migrators are indeed visual adaptations.
Show less
Date Issued
2007
PURL
http://purl.flvc.org/fau/fd/FA00000854
Subject Headings
Animal navigation, Deep-sea biology, Shellfish fisheries, Spectral sensitivity
Format
Document (PDF)
Behavioral Responses of Leatherback Juveniles (Dermochelys coriacea L) to Lights Used in the Longline Fishery
Title
Behavioral Responses of Leatherback Juveniles (Dermochelys coriacea L) to Lights Used in the Longline Fishery.
Creator
Gless, Jodie M., Salmon, Michael, Florida Atlantic University
Abstract/Description
The pelagic longline fishery is responsible for significant mortality to sea turtles as a result of foul hooking, entanglement in the lines, and internal injury after consuming the baited hook. Bait, gear and lights (used to attract the target fishes to the baits at night) are three variables that could also attract sea turtles to the lines. This study tests the role of the lights in attracting leatherback (Dermochelys coriacea) turtles and compares their behavior to the loggerhead (Caretta...
Show moreThe pelagic longline fishery is responsible for significant mortality to sea turtles as a result of foul hooking, entanglement in the lines, and internal injury after consuming the baited hook. Bait, gear and lights (used to attract the target fishes to the baits at night) are three variables that could also attract sea turtles to the lines. This study tests the role of the lights in attracting leatherback (Dermochelys coriacea) turtles and compares their behavior to the loggerhead (Caretta carelta), shown in previous studies to orient toward both lightsticks and battery powered LEDs used in the fishery. The same lights were used in experiments done on leatherbacks reared at Florida Atlantic University's Marine Laboratory. The leatherbacks were exposed to the lights at night when they were between 5 and 42 days old. The results show that leatherbacks, unlike loggerheads, either do not orient toward the lights or orient away from them at an angle that enabled the turtles to keep the light in their peripheral field cf view. Thus, the capture of leatherbacks in longlines is probably a consequence of other factors (such as attraction to the odor of the baits, or to natural prey located near the Iines) that need to be investigated through future research. The results also show that efforts to reduce the incidental capture and injury of marine turtles in longlines must be based upon a firm understanding of the similarities, as well as the differences, between turtle species.
Show less
Date Issued
2007
PURL
http://purl.flvc.org/fau/fd/FA00000763
Subject Headings
Longlining (Fisheries), Fishery management, Spectral sensitivity, Leatherback turtle--Research, Animal behavior
Format
Document (PDF)