scholarly journals Diapause influenced oviposition behavior and physical egg hatch cues of Aedes atropalpus (Diptera: Culicidae): traits that may influence successful colonization of riverine rock pools

2020 ◽  
Vol 45 (2) ◽  
pp. 197-203
Author(s):  
Corey A. Day ◽  
George F. O'Meara ◽  
Kendra N. Pesko ◽  
Naoya Nishimura ◽  
Brian D. Byrd
Keyword(s):  
Oviposition Behavior ◽  
Rock Pools ◽  
Egg Hatch ◽  
Aedes Atropalpus ◽  
Successful Colonization

Population Growth Rates of Aedes atropalpus (Diptera: Culicidae) Are Depressed at Lower Temperatures Where Aedes japonicus japonicus (Diptera: Culicidae) Are Naturally Abundant in Rock Pools

2020 ◽  
Author(s):  
Corey A Day ◽  
Eleanor G Armstrong ◽  
Brian D Byrd
Keyword(s):  
Growth Rate ◽  
Population Growth ◽  
Population Growth Rate ◽  
Invasion Biology ◽  
The United States ◽  
Rock Pools ◽  
Temperature Range ◽  
Natural Rock ◽  
Aedes Atropalpus ◽  
Middle Temperature

Abstract Recent studies report extensive reductions in the abundance of the North American rock pool mosquito, Aedes atropalpus (Diptera: Culicidae), following the invasion of Ae. japonicus japonicus in the United States. Although developmental temperature is recognized as an important component of the invasion biology of Ae. j. japonicus, its impacts on the population growth and fitness of Ae. atropalpus remain largely undefined. In this study we reared Ae. atropalpus larvae at three temperature ranges reflecting ecologically important temperatures in natural rock pools: a low temperature range (mean: 19°C) where Ae. j. japonicus is common and Ae. atropalpus is often rare, a middle temperature range (mean: 25°C) where both species are naturally found in similar relative abundances, and a higher temperature range (mean: 31°C) where Ae. atropalpus is the dominant species. We measured survival, development time, wing length, and fecundity to calculate a finite population growth rate at each temperature. Our results indicate that Ae. atropalpus population growth suffers in colder rock pools, which informs the perceived displacement of the species in temperate habitats. The population growth rate was highest in the middle temperature range, but not significantly higher than in the highest temperature range used in this study. The developmental success of Ae. atropalpus at the intermediate temperature range suggests that competition with Ae. j. japonicus in rock pools within that range may significantly impact natural Ae. atropalpus populations.

scholarly journals Larval competition between Aedes japonicus and Aedes atropalpus (Diptera: Culicidae) in simulated rock pools

2008 ◽  
Vol 33 (2) ◽  
pp. 238-246 ◽  
Author(s):  
Jennifer S. Armistead ◽  
Naoya Nishimura ◽  
Richard L. Escher ◽  
L. Philip Lounibos
Keyword(s):  
Rock Pools ◽  
Larval Competition ◽  
Aedes Japonicus ◽  
Aedes Atropalpus

Influence of Substrate Age on Oviposition Behavior of a Specialist Carrion Colonizer, Cochliomyia macellaria (Diptera: Calliphoridae)

2019 ◽  
Vol 57 (3) ◽  
pp. 686-690
Author(s):  
Zanthé Kotzé ◽  
Jeffery K Tomberlin
Keyword(s):  
Exposure Time ◽  
Oviposition Behavior ◽  
Oviposition Preference ◽  
Egg Hatch ◽  
Hatch Rate ◽  
Cochliomyia Macellaria ◽  
Influence Of Substrate ◽  
Ovipositional Response ◽  
Substrate Age ◽  
Colonization Status

Abstract The location and consumption of carrion by arthropods is a process that can be potentially distinguished temporally based on the makeup of the associated community. In fact, succession on carrion is a continuum of different generalist and specialist arthropods entering and leaving the system. Blow flies commonly associated with vertebrate remains are considered specialists due to their reliance on carrion as a source of food for offspring and protein for females. However, this specialization may come at a price; increased competition for resources and greater risk of local extinction. The present study examined the effects of the presence or absence of intraspecific colonization, carcass age, and exposure time on the colonization and oviposition responses of the specialist, primary colonizer, the secondary screw worm, Cochliomyia macellaria (Fabricius) (Diptera: Calliphoridae). Carcass age, exposure time, and colonization status significantly influenced the ovipositional response of C. macellaria. This species exhibited an oviposition preference for aged carcasses, with a tendency for higher oviposition after 8-h exposure time, but no preference between previously colonized or uncolonized carcasses. Mean egg hatch rate was also shown to be influenced by the aforementioned factors, with mean hatch rates varying between 81.26 and 90.97% across various treatments. These results provide insight into mechanisms driving succession on carrion, as well as highlight the variation observed in successional studies for the targeted species. Investigators relying on arthropod succession to indicate a time of colonization should proceed with caution in relying solely on the assumption primary colonizers only arrive and colonize fresh carrion.

PREDATORS OF AEDES ATROPALPUS (COQ) (DIPTERA: CULICIDAE) AND OF OTHER MOSQUITOES BREEDING IN ROCK POOLS IN ONTARIO

1965 ◽  
Vol 43 (1) ◽  
pp. 155-159 ◽  
Author(s):  
H. G. James
Keyword(s):  
Aquatic Insects ◽  
Rock Pools ◽  
High Radiation ◽  
Radioactive Phosphorus ◽  
Arthropod Predators ◽  
Aedes Atropalpus

Predators of Aedes atropalpus (Coq.) and of other rockpool mosquitoes were investigated at Cordova Mines, Ontario, by tagging larvae with radioactive phosphorus, P32. High radiation counts showed that six species of dytiscids, two of Hemiptera, a leech, and a minnow were predators of A. atropalpus. The dytiscid Laccophilus maculosus Germ. exceeded other arthropod predators in numbers and in degrees of radioactivity. Hydra oligactis Pallas killed but did not ingest the tagged larvae. Other evidence suggested that H. oligactis inhibits breeding by capturing young larvae and paralyzing later stages. Five species of aquatic insects were predacious on larvae of Anopheles and Culex.

Effect of Water Temperature on the Egg Hatch and Early Growth of Walleye Pollock (Gadus chalcogrammus)

2020 ◽  
Vol 32 (2) ◽  
pp. 78-83
Author(s):  
Jin Choi ◽  
Gyeong Sik Han ◽  
Ki Wook Lee ◽  
Soon-Gyu Byun ◽  
Hyun Jeong Lim ◽  
...  
Keyword(s):  
Water Temperature ◽  
Early Growth ◽  
Walleye Pollock ◽  
Egg Hatch ◽  
Effect Of Water

Calcareous meiofauna associated with the calcareous alga Corallina officinalis on bedrock and boulder-field shores of Ceredigion, Wales, UK

2020 ◽  
pp. 1-13
Author(s):  
Brent Wilson ◽  
Lee-Ann C. Hayek
Keyword(s):  
Breaking Waves ◽  
Red Alga ◽  
Low Energy ◽  
Rock Pools ◽  
Lower Shore ◽  
Calcareous Alga ◽  
Corallina Officinalis ◽  
Modes Of Life ◽  
Sessile Organisms

Abstract The intertidal coastline of Ceredigion, Wales, comprises a patchwork of unstable sand and cobble beaches, and stable bedrock areas and boulder-fields. The last two shoreline types support rock-pools with growths of the red alga Corallina officinalis, the thalli of which are a popular substrate for calcareous epiphytes. Replicate samples of C. officinalis (four per site) were taken from (a) three bedrock sites (Ceinewydd, Aberystwyth Victoria Rocks and Castle Rocks) and (b) three boulder-fields (Llanon, Aberaeron lower shore (Aberaeron LS), Llanina) on the lower shore. The middle shore boulder field at Aberaeron (Aberaeron MS) was also sampled. These replicates were examined for calcareous meiofauna (63–2000 μm) not previously examined as a community: spirorbids, foraminifera, gastropods, bryozoans, ostracods and ophiuroids. These were assigned to sessile and vagile modes of life. The sessile association overwhelmingly dominated bedrock coastlines and the Aberaeron MS, while the vagile association was at its most abundant on the Corallina from lower shore, stable boulder-fields. Gastropods were almost entirely limited to Corallina on boulder-fields. We hypothesize that the boulders induce low-energy turbulence among breaking waves, allowing the less firmly attached vagile meiofauna to dominate on C. officinalis in rock-pools in lower shore boulder-fields. The small attachment area of sessile organisms allows them to settle bedrock sites in greater densities than do vagile organisms at boulder-field sites, which are presumed to require larger foraging areas.

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