chokecherry, can be found in grasslands, along riversides, and in forests. Its secondary hosts, including several species of bulrush of the genus Scirpus, grow in marshes and along rivers and lake shores. (Cranshaw, 1996; Voegtlin and Halbert, 1990)is found in temperate regions, wherever its host plants grow. Its primary host,
Like all aphids, has a round, soft body, with a pair of cornicles that secrete fluid at the end of the abdomen. averages 2.25 mm in length. The apterous (wingless) female forms are pale green in color, with a dark green mid-dorsal line on the thorax. Alate (winged) females have a black head and body, while the prothorax is green. Nymphs resemble smaller versions of adults. (Mondor, et al., 2007; Patch, 1914; Quaintance and Challen, 1917; Voegtlin and Halbert, 1990)
Eggs of chokecherry, from May to June. Alate (winged females) appear in mid-May, and these aphids migrate to secondary hosts. Within 24 hours, they produce apterous females. By early June, all colonies disappear from chokecherry and remain exclusively on secondary hosts for the rest of the summer and into the fall. Males and gynoparae (parthenogenetic females that produce sexually reproductive females) are produced on secondary hosts and migrate to chokecherry in the fall. On chokecherry, the gynoparae produce oviparae (egg-laying females that mate with males). Eggs are laid continually on primary host plants from mid-October to November, at which time the plants become dormant and the eggs overwinter. (Quaintance and Challen, 1917; Voegtlin and Halbert, 1990)hatch in the spring after overwintering on dormant host plants. First-generation nymphs are plentiful in the middle of April and may grow through as many as four instars within two weeks. Apterous (wingless) females first appear in the beginning of May, while second-generation nymphs appear shortly thereafter by parthenogenesis. Adults are most abundant on their primary host,
Little information is available regarding the mating systems of chokecherry. Only parthenogenesis occurs on the secondary host plants. Oviparae (egg-laying females that mate with males) likely produce pheromones to attract mates. (Symmes, et al., 2012; Taber, 1994). Mating and parthenogenesis occur on the primary host,
Female aphids give birth to genetically identical live young via parthenogenesis throughout the spring and summer. The number of live young produced by one female is unknown for this species; however, in other aphid species, one female can produce hundreds or even thousands of offspring. Eggs are laid continually from mid-October to November on the host plant, chokecherry, around buds and in the crooks of twigs. Females produce one or more eggs; the maximum number of eggs has not been documented. The host plant becomes dormant during the winter, during which time the eggs overwinter. (Mondor, et al., 2007; Voegtlin and Halbert, 1990; van Emden and Harrington, 2007)
Although little information specific to aphid species live a few weeks to a month. The entire colony dies out before the winter, and the eggs that overwinter repopulate the colony in the spring. (Voegtlin and Halbert, 1990; van Emden and Harrington, 2007)exists regarding lifespan and longevity, most
While little information specific to Aphids perceive their environment visually, typically with a preference for yellow surfaces. As a host-specific aphid species, likely finds host plants by detecting host-specific chemicals and odors. The main olfactory organs in aphids are located in the antennae. Most aphid species also produce an alarm pheromone that alerts other aphids of a predator attack. These chemicals are released in a droplet from the cornicles. (Joachim, et al., 2013; Symmes, et al., 2012; van Emden and Harrington, 2007)exists regarding communication and perception, most aphid species use pheromones to attract mates. During the reproductive stage of the aphid life cycle, egg-laying females (oviparae) produce a pheromone to attract males.
Like all aphids, feeds solely on plant phloem. It pierces the plant vessels to retrieve the sap. The primary host of is chokecherry, on which it feeds from April to June. After June, some members of the colony migrate to secondary host plants. These secondary hosts include Scirpus validus in the Midwestern United States, Scirpus acutus in Washington and Idaho, Eleocharis erythropoda, Scirpus atrovirens, and pin cherry. (Cranshaw, 1996; Mondor, et al., 2007; Voegtlin and Halbert, 1990)
Many species of lady beetles (Coccinellidae) are avid predators of aphids. To in particular, lady beetles of the genus Hippodamia are predators, though many other Coccinellidae species probably prey on as well. Green lacewings and syrphid fly larvae are generalist predators of aphids and likely prey on . The mutualist ant, Formica montana, protects from predators in return for honeydew produced by the aphids, which the ants farm. has little other defense from predators. Gathering in colonies may decrease predation pressure on individuals. When threatened, many aphid species release an alarm pheromone that alerts other aphids in the colony of an attack. In response to the alarm pheromone, aphids exhibit escape behaviors such as dropping off the host plant or walking away. (Cranshaw, 1996; Vaundell and Storch, 1972; Voegtlin and Halbert, 1990; van Emden and Harrington, 2007)
The primary host of chokecherry. Large colonies feed exclusively on the phloem from these plants until June, when the colonies disappear and some individuals migrate to secondary host plants, including several species of bulrush (Scirpus validus, Scirpus acutus, and Scirpus atrovirens), Eleocharis erythropoda, and pin cherry. serves as prey to a variety of other insects, most notably lady beetles, lacewings, and syrphid flies. Like all Aphididae species, hosts an endosymbiotic bacterium species, Buchnera aphidicola. This symbiosis is an obligate relationship for both species. Buchnera aphidicola produces essential amino acids that aphids do not get from their plant phloem diet, while Buchnera aphidicola cannot survive outside the body of an aphid. The ant Formica montana is known to farm colonies of in a mutualistic relationship. Formica montana eats the honeydew that produces, while the ants in turn provide protection for the aphid colony. also has been documented living in one colony with other aphid species, particularly Asiphonaphis pruni. (Cranshaw, 1996; Silva, et al., 2006; Vaundell and Storch, 1972; Voegtlin and Halbert, 1990)is
There are no known positive effects ofon humans.
While many aphid species act as agricultural pests on their host plants, is not considered to be a serious pest on chokecherry. has the potential to damage chokecherry plants and its secondary host plants when present in large numbers, though severe occurrences have yet to be recorded. (Taber, 1994)
has no special conservation status.
Angela Miner (author), Animal Diversity Web Staff, Elizabeth Wason (editor), Animal Diversity Web Staff, Leila Siciliano Martina (editor), Animal Diversity Web Staff.
living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.
reproduction that is not sexual; that is, reproduction that does not include recombining the genotypes of two parents
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
uses smells or other chemicals to communicate
used loosely to describe any group of organisms living together or in close proximity to each other - for example nesting shorebirds that live in large colonies. More specifically refers to a group of organisms in which members act as specialized subunits (a continuous, modular society) - as in clonal organisms.
animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature
union of egg and spermatozoan
forest biomes are dominated by trees, otherwise forest biomes can vary widely in amount of precipitation and seasonality.
An animal that eats mainly plants or parts of plants.
having a body temperature that fluctuates with that of the immediate environment; having no mechanism or a poorly developed mechanism for regulating internal body temperature.
fertilization takes place within the female's body
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
marshes are wetland areas often dominated by grasses and reeds.
A large change in the shape or structure of an animal that happens as the animal grows. In insects, "incomplete metamorphosis" is when young animals are similar to adults and change gradually into the adult form, and "complete metamorphosis" is when there is a profound change between larval and adult forms. Butterflies have complete metamorphosis, grasshoppers have incomplete metamorphosis.
having the capacity to move from one place to another.
the area in which the animal is naturally found, the region in which it is endemic.
reproduction in which eggs are released by the female; development of offspring occurs outside the mother's body.
development takes place in an unfertilized egg
chemicals released into air or water that are detected by and responded to by other animals of the same species
"many forms." A species is polymorphic if its individuals can be divided into two or more easily recognized groups, based on structure, color, or other similar characteristics. The term only applies when the distinct groups can be found in the same area; graded or clinal variation throughout the range of a species (e.g. a north-to-south decrease in size) is not polymorphism. Polymorphic characteristics may be inherited because the differences have a genetic basis, or they may be the result of environmental influences. We do not consider sexual differences (i.e. sexual dimorphism), seasonal changes (e.g. change in fur color), or age-related changes to be polymorphic. Polymorphism in a local population can be an adaptation to prevent density-dependent predation, where predators preferentially prey on the most common morph.
Referring to something living or located adjacent to a waterbody (usually, but not always, a river or stream).
breeding is confined to a particular season
reproduction that includes combining the genetic contribution of two individuals, a male and a female
that region of the Earth between 23.5 degrees North and 60 degrees North (between the Tropic of Cancer and the Arctic Circle) and between 23.5 degrees South and 60 degrees South (between the Tropic of Capricorn and the Antarctic Circle).
Living on the ground.
A terrestrial biome. Savannas are grasslands with scattered individual trees that do not form a closed canopy. Extensive savannas are found in parts of subtropical and tropical Africa and South America, and in Australia.
A grassland with scattered trees or scattered clumps of trees, a type of community intermediate between grassland and forest. See also Tropical savanna and grassland biome.
A terrestrial biome found in temperate latitudes (>23.5° N or S latitude). Vegetation is made up mostly of grasses, the height and species diversity of which depend largely on the amount of moisture available. Fire and grazing are important in the long-term maintenance of grasslands.
uses sight to communicate
reproduction in which fertilization and development take place within the female body and the developing embryo derives nourishment from the female.
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