The photic environment and scotopic visual pigments of the creek chub,Semotilus atromaculatus and white sucker,Catostomus commersoni

Heinermann, P. H.; Ali, M. A.

doi:10.1007/bf00614513

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…Few studies have attempted a direct comparison between the quality of the underwater light and the spectral sensitivity or visual pigment absorption of resident fish (Heinermann and Ali, 1985;Crescitelli et al, 1985;Pankhurst and Montgomery, 1989;Heinermann and Ali, 1989). In the first three of these works and this study a good correspondence was found between the underwater light and the visual sensitivity of the fish.…”

supporting

confidence: 58%

“…7) is linked to the relatively small amount of gilvin present in Thingvallavatn (Table 1). The importance of gilvin in the removal of blue light from the downwelling stream has been observed by many workers (Shapiro, 1957;Kirk, 1976;Verduin, 1982;Kishiho et al, 1984;Watras and Baker, 1988;Heinermann and Ali, 1988;Heinermann et al, 1990).…”

mentioning

confidence: 84%

“…These volcanic lakes are a valuable addition to a continuing survey of lakes at different latitudes and of differing trophic states (Heinermann, 1986;Heinermann and Ali, 1988;Heinermann et al, 1990). As well, a detailed investigation of the underwater light in these lakes is lacking, even though most other aspects of the ecosystems of Thingvallavatn and Myvatn have been studied (Antonsson, 1977;Jhasson, 1979;Lindegaard, 1980;Snorrason, 1982;Lastein, 1983;J6nsson, 1987;J6nasson and Lindegaard, 1988;Jonsson et al, 1988;Gardarsson et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

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The Underwater Photic Environment of Two Subarctic Icelandic Lakes

Heinermann¹,

Ali²

1993

ARCTIC

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ABSTRACT. The Underwater light fields of two Icelandic lakes of volcanic origin and differing trophic status, Thingvallavam (oligotrophic) and Myvatn (eutrophic), were investigated. Gilvin and turbidity depth profiles were also measured. Diurnal variation in photosynthetically active radiation (PAR) reached almost 3 orders of magnitude. Downward irradiance spectra were variable near the surface, but with increases in depth transmission peaks at 510,560 and 570 nanometres (nm) became apparent in Thingvallavatn, Myvatn-East Basin and Myvatn-South Basin respectively. Upward irradiance transmission maxima shifted from 480 to 500 nm with depth in Thingvallavatn, while in Myvatn they remained near 570 nm. An irradiance trough at 520 nm was noted in both the upward and downward spectra of Thingvallavatn. The importance of phytoplankton (chlorophyll) Alors que les spectres de l'irradiance descendante variaient prbs de la surface, ils augmentaient avec la profondeur aux pics de transmission de 510, 560 et 570 nanombtres (nm) respectivement dans le Thingvallavatn et le bassin est du Myvatn et le bassin sud du Myvam. Les maxima dans la transmission de l'irradiance ascendante ont kt6 dCalks avec la profondeur de 480 B 500 nm dans le Thingvallavatn tandis que dans le Myvatn ils sont demeurks p&s de 570 nm. Une zone d'absorption B 520 nm a kgalement 6te observ6.e dans les spectres descendants et ascendants du Thingvallavatn. L'importance du phytoplancton (chlorophylle) et de la matikre organique dissoute (gilvin) dans la modification de l'environnement photique sous-marin du Myvatn a kt6 nettement dkmontr6.e. Les spectres moyens de l'irradiance descendante et ascendante co'incident trbs ktroitemnt avec les sensibdies spectrales chez les ombles-chevaliers adultes indigbnes. Ceci appuie l'hypothbse de la sensibilit6 chez ces poissons.

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supporting

confidence: 58%

mentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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The Underwater Photic Environment of Two Subarctic Icelandic Lakes

Heinermann¹,

Ali²

1993

ARCTIC

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“…In contrast to the rainbow trout, where the metamorphic hormone thyroxine triggers the loss of UV-sensitive corner cones (Browman & Hawryshyn, 1992), the flounder larval photoreceptors appear to be retained but renovated. Changes in photopigment absorbance can occur by two processes: (1) a change in chromophore between Vitamin A, and A 2 as observed in eels (Beatty, 1975), trout (Allen & Munz, 1983), and temperate freshwater fish (Heinermann & Ali, 1989); or (2) a change in the opsin. In both the pollack (Shand et al, 1988) and winter flounder (this study), the chromophore does not change suggesting new opsins are involved.…”

Section: Discussionmentioning

confidence: 99%

Photoreceptor spectral absorbance in larval and adult winter flounder (Pseudopleuronectes americanus)

Evans

Hárosi²,

Fernald³

1993

Vis Neurosci

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The habitat occupied by larval winter flounder (Pseudopleuronectes americanus) differs considerably in light regime from that of the adult. To understand how the visual system has adapted to such changes, photoreceptor spectral absorbance was measured microspectrophotometrically in premetamorphic and postmetamorphic specimens of winter flounder. Before metamorphosis, larval flounder retinas contain only one kind of photoreceptor which is morphologically cone-like with peak absorbance at 519 nm. After metamorphosis, the adult retina has three types of photoreceptors: single cones, double cones, and rods. The visual pigment in single cones has a peak absorbance at X max = 457 nm, the double cones at X max = 531 and 547 nm, and the rod photoreceptors at X max = 506 nm. Double cones were morphologically identical, but the two members contained either different (531/547 nm) or identical pigments (531/531 nm). The latter type were found only in the dorsal retina. The measured spectral half-bandwidths (HBW) were typical of visual pigments with chromophores derived from vitamin A! with the possible exception of the long-wavelength absorbing pigment in double cones which appeared slightly broader. Because the premetamorphic pigment absorbance has a different X max than those of the postmetamorphic pigments, different opsin genes must be expressed before and after metamorphosis.

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