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Author Hu, C.; Chen, S.; Wang, M.; Murch, B.; Taylor, J.
Title Detecting surface oil slicks using VIIRS nighttime imagery under moon glint: a case study in the Gulf of Mexico Type Journal Article
Year 2015 Publication Remote Sensing Letters Abbreviated Journal Remote Sensing Letters
Volume 6 Issue 4 Pages 295-301
Keywords Remote Sensing
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ISSN 2150-704X ISBN Medium
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Notes Approved no
Call Number LoNNe @ christopher.kyba @ Serial 1151
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Author Meyer, L.A.; Sullivan, S.M.P.
Title Bright lights, big city: influences of ecological light pollution on reciprocal stream-riparian invertebrate fluxes Type Journal Article
Year 2013 Publication Ecological Applications Abbreviated Journal Ecological Applications
Volume 23 Issue 6 Pages 1322-1330
Keywords ecological light pollution; ecosystem function; stream–riparian invertebrate fluxes; tetragnathid spiders; urban streams
Abstract Cities produce considerable ecological light pollution (ELP), yet the effects of artificial night lighting on biological communities and ecosystem function have not been fully explored. From June 2010 to June 2011, we surveyed aquatic emergent insects, riparian arthropods entering the water, and riparian spiders of the family Tetragnathidae at nine stream reaches representing common ambient ELP levels of Columbus, Ohio, USA, streams (low, 0.1–0.5 lux; moderate, 0.6–2.0 lux; high, 2.1–4.0 lux). In August 2011, we experimentally increased light levels at the low- and moderate-treatment reaches to 10–12 lux to represent urban streams exposed to extremely high levels of ELP. Although season exerted the dominant influence on invertebrate fluxes over the course of the year, when analyzed by season, we found that light strongly influenced multiple invertebrate responses. The experimental light addition resulted in a 44% decrease in tetragnathid spider density (P = 0.035), decreases of 16% in family richness (P = 0.040) and 76% in mean body size (P = 0.022) of aquatic emergent insects, and a 309% increase in mean body size of terrestrial arthropods (P = 0.015). Our results provide evidence that artificial light sources can alter community structure and ecosystem function in streams via changes in reciprocal aquatic–terrestrial fluxes of invertebrates.
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ISSN 1051-0761 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 102
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Author Ter Maat, A.; Pieneman, A.W.; Koene, J.M.
Title The effect of light on induced egg laying in the simultaneous hermaphrodite Lymnaea stagnalis Type Journal Article
Year 2012 Publication Journal of Molluscan Studies Abbreviated Journal Journal of Molluscan Studies
Volume 78 Issue 3 Pages 262-267
Keywords molluscs; Lymnaea stagnalis; reproduction
Abstract Reproduction is influenced by many external factors. For egg laying of pond snails, one important trigger is the transfer from dirty, oxygen-poor water to clean, oxygen-rich water. This response is due to the combined effects of elevated oxygen level, chemical water composition and clean substrate. Whether this clean-water stimulus (CWS) resembles the natural egg-laying process has remained untested. Given that the response relies heavily on a pretreatment that suppresses egg laying, the animal's internal state is clearly important. Egg laying is known to be influenced by day length, hence external factors signifying time of day or season may be involved. We here study the effect of light on the CWS in the freshwater pulmonate Lymnaea stagnalis. Clean water was more effective in inducing oviposition in the light than during darkness, irrespective of the presence of eyes. Thus, light has a profound influence on egg laying, which is most likely mediated by nonocular photoreceptors. We show that more eggs are laid during the day than during the night in wild-caught animals kept outside, which indicates that the effect of light on CWS-induced egg laying is relevant for the induction of egg laying under natural conditions.
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ISSN 0260-1230 ISBN Medium
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Notes Approved no
Call Number IDA @ john @ Serial 103
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Author Mercier, A.; Ycaza, R.; Hamel, J.
Title Long-term study of gamete release in a broadcast-spawning holothurian: predictable lunar and diel periodicities Type Journal Article
Year 2007 Publication Marine Ecology Progress Series Abbreviated Journal Mar. Ecol. Prog. Ser.
Volume 329 Issue Pages 179-189
Keywords Spawning; Periodicity; Lunar cycle; Reproductive synchrony; Holothurians; Echinoderms; Isostichopus fuscus
Abstract Annual and monthly patterns of gamete release by the sea cucumber Isostichopus fuscus on the coast of Ecuador were studied to determine the proximal spawning cue and variations in reproductive output throughout the year. Several hundred newly collected individuals were monitored nearly every month for 4 yr. I. fuscus displayed a lunar spawning periodicity: 0.7 to 34.9% of individuals consistently spawned 1 to 4 d after the new moon. Spawning mostly occurred within one evening; however, some gamete release was often recorded over 2 to 4 consecutive evenings. Individuals maintained in captivity for several months retained their spawning periodicity and timing with the lunar cycle. Conversely, newly caught individuals that were shaded from the moonlight did not spawn, thus demonstrating the apparent lack of endogenous rhythms and prevalence of lunar luminance over other cues (i.e. tidal cycle, fluctuations in barometric pressure). On a spawning night, males typically initiated gamete release around sunset; females spawned just after the peak male broadcast. The percentage of spawning individuals was higher and a greater overlap between male and female peak spawning activity was observed during clear conditions compared with overcast conditions. The gonads of individuals that did not spawn in a given month showed a variety of maturity levels, including post-spawning, growth and mature gametogenic stages. Hence, the individual reproductive cycle is apparently longer than the monthly spawning periodicity observed at the population level, enabling I. fuscus populations to be reproductive year round.
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ISSN 0171-8630 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 104
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Author Yamashita, Y.; Matsushita, Y.; Azuno, T.
Title Catch performance of coastal squid jigging boats using LED panels in combination with metal halide lamps Type Journal Article
Year 2012 Publication Fisheries Research Abbreviated Journal Fisheries Research
Volume 113 Issue 1 Pages 182-189
Keywords Squid jigging; LED; Metal halide lamp; Catch performance; GLM
Abstract Squid attracting light systems consisting of low power light emitting diode panels (LEDs) and conventional metal halide lamps (MHs) were tested to describe the influence of combinations of LEDs and MHs on squid catch. Fishing trials using LEDs (9 kW) and different numbers of MHs were carried out in August and September 2009 targeting two squid species: (1) Japanese common squid Todarodes pacificus in northern waters of the Sea of Japan (off Hokkaido) by 4 coastal squid jigging boats (19 gross tonnage) and (2) swordtip squid Photololigo edulis in western waters (off Iki) by 5 boats of the same class. Catches of both species tended to increase with the number of MHs. Generalized Linear Model analysis revealed that in addition to the number of MHs, the catch amount was influenced by fishing power (ability) of boat and by the monthly variation of squid abundance (only for P. edulis off Iki). The expected catch (number of boxes) was not proportional to the number of MHs. The largest catch was expected for P. edulis off Iki by using LEDs with 24 MHs. The optimal combination of LEDs and MHs for T. pacificus off Hokkaido was less clear because the combination with 36 MHs had the largest positive effect on the catch; this was the maximum number MHs used.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 0165-7836 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 105
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