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17 results for “Emergence trap”
City of Seattle, Seattle Public Utilities, Bull Trout Fry Emergence Trapping 2023-current, Cedar River Municipal Watershed, King County, WA
Chester Morse Lake is managed for drinking water supply for the City of Seattle by Seattle Public Utilities (SPU). The reservoir was created in 1915 upon the completion of Masonry Dam, which raised the natural level of Cedar Lake from 1,538 feet to normal operational levels between 1,550 and 1,554 feet, with a maximum refill level of 1,565 feet. Construction of the dam removed several miles of potential stream spawning, incubation, and rearing habitat for an adfluvial population of bull trout, a species listed as threatened under the U.S. Endangered Species Act. The reservoir fluctuates widely across operational elevations during fall and winter storms. During reservoir refill in springtime, however, the reservoir will be continuously filled until reaching peak elevation (1,560 -1,565 feet) terminally inundating habitat where bull trout had previously spawned and embryos and alevins continue to develop in the streambed. Embryo incubation and fry emergence timing data are required to improve SPU's understanding of frequency and magnitude of operational impacts to bull trout embryos developing in stream habitats affected by reservoir inundation. This information enables empirically-based estimates for the number of embryos in the streambed vulnerable to impacts of inundation during fall and winter storms, which is an intermittent impact period for embryos; and reservoir refill, which is a terminal impact period for embryos. Between two and six hand-driven redd egg pocket water quality monitoring wells and quarantine fences (to avoid additional spawning and superimposition) were deployed near primary egg pockets the week of redd observation. Temperature and dissolved oxygen data were recorded in wells and weekly logger downloads informed biologists of incubation conditions (temperature and oxygen) and accumulated temperature units (ATU). Upon reaching approximately 500 ATU, fry emergence traps were deployed over quarantined redds and subsequently, cod ends were sampled
Fig. 1 in A bucket-type emergence trap for detecting overwintered Dasineura oxycoccana (Diptera: Cecidomyiidae) and its parasitoids in cranberry
Fig. 1. Bucket-type emergence trap seated into cranberry field. Inner bucket with mesh lid is descending into support bucket.
Fig. 2 in A bucket-type emergence trap for detecting overwintered Dasineura oxycoccana (Diptera: Cecidomyiidae) and its parasitoids in cranberry
Fig. 2. Number (mean + SEM) of overwintered cranberry tipworms and parasitoids detected per emergence trap per wk in 2015. Julian Date 124 = 4 May; 152 = 1 Jun; 187 = 6 Jul; 215 = 3 Aug. Number of traps per wk was 30, 50, 59, 60, 60, 46, 56, 57, 57, 57, 57, 57, 57, 57, 57, 51, 51, respectively, for the 17 wk.
Microclimate-driven trends in spring-emergence phenology in a temperate reptile (Vipera berus): Evidence for a potential 'climate trap'?
<p>Climate change will increase the exposure of organisms to higher temperatures, but can also drive phenological shifts that alter their susceptibility to conditions at the onset of breeding cycles. Organisms rely on climatic cues to time annual life-cycle events, but the extent to which climate change has altered cue reliability remains unclear. Here, we examine the risk of a 'climate trap' – a climatically-driven desynchronisation of the cues that determine life-cycle events and fitness later in the season in a temperate reptile, the European adder (<em>Vipera berus)</em>. During the winter, adders hibernate underground, buffered against sub-zero temperatures, and re-emerge in the spring to reproduce. We derived annual spring-emergence trends between 1983 and 2017 from historical observations in Cornwall, United Kingdom, and related these trends to the microclimatic conditions that adders experienced. Using a mechanistic microclimate model, estimates of below- and near-ground temperatures were used to derive accumulated degree-hour and absolute temperature thresholds that predicted annual spring-emergence timing. Trends in annual emergence timing and subsequent exposure to ground frost were then quantified. We found that adders have advanced their phenology towards earlier emergence. Earlier emergence was associated with increased exposure to ground frost and, contradicting the expected effects of macroclimate warming,<em> </em>increased post-emergence exposure to ground frost at some locations. The susceptibility of adders to this 'climate trap' was related to the rate at which frost risk diminishes relative to advancement in phenology, which depends on the seasonality of climate. We emphasise the need to consider exposure to changing microclimatic conditions when forecasting biological impacts of climate change.</p>
Microclimate-driven trends in spring-emergence phenology in a temperate reptile (Vipera berus): Evidence for a potential 'climate trap'?
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Fig. 3 in Giant Cicada Emergence, Protandry and Chorus Centers Formation as Revealed by Studies Using a Sound Trap
Fig. 3 Chorionated oocytes (mean number ± SEM) per Quesada gigas female (columns) and percentage of mature females of Q. gigas (diamonds) captured at different days after the beginning of male emergence in 2015
Fig. 2 in Giant Cicada Emergence, Protandry and Chorus Centers Formation as Revealed by Studies Using a Sound Trap
Fig. 2 Ovarian maturation status in Quesada gigas captured in 2013 at two dates after cicada emergence. a Immature ovary of Quesada gigas at 15 days after male emergence (DAME). b Mature ovary of Q. gigas with chorionated oocytes inside ovarioles at 30 DAME
Fig. 4 in Giant Cicada Emergence, Protandry and Chorus Centers Formation as Revealed by Studies Using a Sound Trap
Fig. 4 Number of cicada males (diamonds) or females (squares) collected at different days after the beginning of male emergence using the sound trap in 2015
Figure 4 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 4 Brood cells of Epicharis (Epicharoides) pictaA outer cell wall surface B mature larva inside the cell C inner cell wall surface D the cell cap inserted below the apex of the cell wall E variation in brood cell shape. Scale bars: 5 mm.
Figure 3 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 3 Nesting habits and nest architecture of Epicharis (Epicharoides) pictaA female resting inside the nests at night B female of E. picta excavating nest C, D entrance of the nests showing the presence of a tumulus E, F architecture of 110 cm deep nests.
Figure 1 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 1 Climatological data from Viçosa, Minas Gerais-Brazil, between 2009 and 2011 (Source: Estação Climatológica Principal de Viçosa, Departamento de Engenharia Agrícola – UFV).
Figure 2 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 2 Emergence-traps set up on aggregate of Epicharis (Epicharoides) picta (A); Detail of emergence-trap (B).
Figure 6 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 6 Natural enemies and associated species of Epicharis (Epicharoides) pictaARhathymus friesei inspecting at the nest aggregation BTetraonyx sexguttata emerging from a nest of E. pictaCApiomerus lanipes preying on a female of E. pictaDTraumatomutilla sp. inspecting the entrance of a nest of E. picta.
Figure 7 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 7 Content of Epicharis (Epicharoides) picta brood cells A dead E. picta female pupa with fungus B food in E. picta brood cell taken by fungus C exoskeleton of Tetraonyx sexguttataD male of E. picta emerged from brood cell maintained in laboratory.
Figure 5 from: Werneck HA, Campos LAO (2020) A study of the biology of Epicharis (Epicharoides) picta using emergence-traps. Journal of Hymenoptera Research 80: 147-167. https://doi.org/10.3897/jhr.80.56898
Figure 5 Emergence patterns in the emergence-traps set up on the nest aggregation of Epicharis (Epicharoides) pictaA emergence of all species sampled in the traps B emergence of the males and females of E. pictaC emergence of the males and females of Rhathymus friesei.
Fig. 1 in Giant Cicada Emergence, Protandry and Chorus Centers Formation as Revealed by Studies Using a Sound Trap
Fig. 1 Sound trap used for the capture of Quesada gigas in a coffee plantation. a General perspective of the sound trap attached to a pickup. b Details of the sound trap. ❶Insecticide sprayers in the front of the horn broadcasting Q. gigas males song; ❷Recipticle for collection of dead cicadas and for insecticide recirculation
Description of pre-emergent behavior of solitary Anthidiini bees in trap nests
<ul> <li>Description of the behavior of solitary bees inside trap nests before emerging.</li> </ul>
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