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Sexual Cannibalism
Sexual cannibalism is when an animal, usually the female, Cannibalism, cannibalizes its mate prior to, during, or after Copulation (zoology), copulation. This trait is observed in many arachnid orders, several insect and crustacean clades, Gastropoda, gastropods, and some snake species. Several hypotheses to explain this seemingly paradoxical behavior have been proposed, including the adaptive foraging hypothesis, aggressive spillover hypothesis and mistaken identity hypothesis. This behavior is believed to have evolved as a manifestation of sexual conflict, occurring when the reproductive interests of males and females differ. In many species that exhibit sexual cannibalism, the female consumes the male upon detection. Females of cannibalistic species are generally hostile and unwilling to mate; thus many males of these species have developed adaptive behaviors to counteract female aggression. Prevalence Sexual cannibalism occurs among insects, arachnids and Amphipoda, amphipods. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vorarephilia
Vorarephilia (often shortened to vore) is a paraphilia characterized by the erotic desire to be consumed by, or to personally consume, another person or creature, or an erotic attraction to the process of eating in general practice. Soft vore fantasies are separated from sexual fantasies of human cannibalism, cannibalism, also referred to as "hard vore", because the soft vore victim is normally swallowed alive and whole. The word ''vorarephilia'' is derived from the Latin ' (to "swallow" or "devour"), and Ancient Greek (', "love"). Content Usually, vorarephilic fantasies involve a consumer (usually referred to as ''predator'' or ''pred'' for short) ingesting one or multiple victims (sometimes called ''prey'') in some way. Since vorarephilic fantasies cannot be acted out in reality without injuring or killing someone, they are often expressed in stories or drawings as well as sexual roleplay. Vore is most often enjoyed through pictures, stories, videos, and video games, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
False Garden Mantis
The false garden mantis (''Pseudomantis albofimbriata'') is a species of praying mantis in the family Mantidae, and was first described in 1860 by Carl Stål as ''Mantis albofimbriata''.Stål, C. 1860Orthoptera. Species novas descripsit Konglia Svenska Freggaten Eugenies Resa omkring jorden. Zoologi. I. Insecta. Stockholm : P.A. Norstedt & Söner pp. 299-350. 12 Females reach 70 mm while males reach 50 mm. Identification/distribution The false garden mantis is either green or brown but rarely may come in other colours such as purple-reddish-brown but mostly in green. They have a distinctive dark spot on the femur of each raptorial foreleg. Females have short wings that only cover half of the abdomen, whereas males have wings that cover the full length of the abdomen. Males sometimes have yellow triangular markings on the underside of the abdomen. They are most commonly found in New South Wales and Queensland, but can be found in limited numbers in every Austral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apparent Death
Apparent death is a behavior in which animals take on the appearance of being death, dead. It is an immobile state most often triggered by a predatory attack and can be found in a wide range of animals from insects and crustaceans to mammals, birds, reptiles, amphibians, and fish. Apparent death is separate from the freezing behavior seen in some animals. Apparent death is a form of animal deception considered to be an anti-predator strategy, but it can also be used as a form of aggressive mimicry. When induced by humans, the state is sometimes colloquially known as animal hypnosis. The earliest written record of "animal hypnosis" dates back to the year 1646 in a report by Athanasius Kircher, in which he subdued chickens. Description Tonic immobility (also known as the act of feigning death, or exhibiting thanatosis) is a behaviour in which some animals become apparently temporarily paralysed and unresponsive to external stimuli. Tonic immobility is most generally considered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pisaura Mirabilis
The nursery web spider ''Pisaura mirabilis'' is a spider species of the family Pisauridae. Description Striking characteristics of ''Pisaura mirabilis'' are its long legs (the fourth pair being the longest) and its slender abdomen ( opisthosoma). The male is between 10 and 13 mm, while the female is 12 to 15 mm. After final ecdysis, the male spiders weigh on average 54 mg and females 68 mg. The prosoma ( cephalothorax) is variable in color, ranging from light to reddish brown and from gray to black. A lighter stripe is visible down the middle of the prosoma. The opisthosoma (abdomen) is long and narrow and tapered towards the rear end. The female spiders has a dark patch ( epigyne) on the underside of her abdomen that includes the copulatory organs. Male genital openings can be found at the same location, but remain inconspicuous. Patterning and coloration varies due to polymorphism. These patterns, which can be caused by hair and pigments, change wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Courtship Dance
A courtship display is a set of display behaviors in which an animal, usually a male, attempts to attract a mate; the mate Mate choice, exercises choice, so sexual selection acts on the display. These behaviors often include ritualized movement ("dances"), animal vocalization, vocalizations, mechanical sound production, or displays of beauty, strength, or Agonistic behaviour, agonistic ability. Male display In some species, males will perform ritualized movements to attract females. The male six-plumed bird-of-paradise (Lawes's parotia, ''Parotia lawesii'') exemplifies male courtship display with its ritualized "ballerina dance" and unique occipital and breast feathers that serve to stimulate the female visual system. In ''Drosophila subobscura,'' male courtship display is seen through the male's intricate wing scissoring patterns and rapid sidestepping. These stimulations, along with many other factors, result in subsequent copulation or rejection. In other species, males may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argiope Keyserlingi
''Argiope keyserlingi'' is a species of Orb web, orb-web spider found on the east coast of Australia, from Victoria (Australia), Victoria to northern Queensland. It is very similar in appearance to a closely related north Queensland species, ''Argiope aetherea''. ''A. keyserlingi'' is commonly found in large populations in suburban parks and gardens, particularly among the leaves of ''Lomandra longifolia''. Like many species of orb-web spiders, ''A. keyserlingi'' shows considerable sexual dimorphism, with the females being many times larger than the males. Mature females can be seen during the summer, and seeing multiple males on the web of one female is not uncommon. ''A. keyserlingi'' is commonly known as the St. Andrew's cross spider, due to the construction of bands of silk forming the arms of an X-shaped cross, similar to the one upon which Andrew_the_Apostle#Martyrdom, St. Andrew is traditionally said to have been crucified. Juveniles of this species sometimes build a spiral- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lipid
Lipids are a broad group of organic compounds which include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others. The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes. Lipids have applications in the cosmetic and food industries, and in nanotechnology. Lipids are broadly defined as hydrophobic or amphiphilic small molecules; the amphiphilic nature of some lipids allows them to form structures such as vesicles, multilamellar/ unilamellar liposomes, or membranes in an aqueous environment. Biological lipids originate entirely or in part from two distinct types of biochemical subunits or "building-blocks": ketoacyl and isoprene groups. Using this approach, lipids may be divided into eight categories: fatty acyls, glycerolipids, glycerophospholipids, sphingolipids, saccharolipids, and polyketides (derived from condensatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residue (biochemistry), residues. Proteins perform a vast array of functions within organisms, including Enzyme catalysis, catalysing metabolic reactions, DNA replication, Cell signaling, responding to stimuli, providing Cytoskeleton, structure to cells and Fibrous protein, organisms, and Intracellular transport, transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the Nucleic acid sequence, nucleotide sequence of their genes, and which usually results in protein folding into a specific Protein structure, 3D structure that determines its activity. A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called pep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hogna
''Hogna'' is a genus of wolf spiders with more than 200 described species. It is found on all continents except Antarctica. Etymology The word ''Hogna'' might be a rough latinization of one of the Greek words '' ὄχνη'' (''ókhnē'') "pear" or '' ὄγχνη'' (''ónkhnē'') "pear-tree". Species ''Hogna carolinensis'' is among the largest spiders found in the United States; females may have a body length of from to . The carapace of ''H. carolinensis'' is characterized by an overall dark brown coloration, usually without any patterned variations. Its abdomen has a slightly darker stripe down its center, and its ventral side is black. This spider typically dwells in a vertical tube dug into the ground that may reach as deep as eight inches. , the World Spider Catalog accepted the following species: *'' Hogna ackermanni'' Logunov, 2020 – Afghanistan *'' Hogna adjacens'' Roewer, 1959 – Southern Africa *'' Hogna agadira'' (Roewer, 1960) – Morocco *'' Hogna albe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ootheca
An ootheca (: oothecae ) is a type of egg capsule made by any member of a variety of species including mollusks (such as '' Turbinella laevigata''), mantises, and cockroaches. Etymology The word is a Latinized combination of ''oo-'', meaning "egg", from the Greek word ''ōon'' (cf. Latin ''ovum''), and ''theca'', meaning a "cover" or "container", from the Greek ''theke''. Ootheke is Greek for ovary. Structure Oothecae are made up of structural proteins and tanning agents that cause the protein to harden around the eggs, providing protection and stability. The production of ootheca convergently evolved across numerous insect species due to a selection for protection from parasites and other forms of predation, as the complex structure of the shell casing provides an evolutionary reproductive advantage (although the fitness and lifespan also depend on other factors such as the temperature of the incubating ootheca). Oothecae are most notably found in the orders Blattodea (Cockro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycosa Tarantula
''Lycosa tarantula'' is the species originally known as the tarantula, a name that nowadays in English commonly refers to spiders in another family entirely, the Theraphosidae. It now may be better called the tarantula wolf spider, being in the wolf spider family, the Lycosidae. ''L. tarantula'' is a large species found in southern Europe, especially in the Apulia region of Italy and near the city of Taranto, from which it gets its name. " edieval Latin, from Old Italian ''tarantola'', after Taranto. Historical superstition has it that the spider's bite can produce severe symptoms called tarantism. Description These spiders are rather large, the females being as large as in body length and the males around . As with other wolf spiders, the silken sac containing over 100 eggs is carried attached to the mother's spinnerets, and then after they hatch, the spiderlings climb on their mother's abdomen and ride around with her for some time until they are sufficiently mature to sur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agelenopsis Pennsylvanica
''Agelenopsis pennsylvanica'', commonly known as the Pennsylvania funnel-web spider or the Pennsylvania grass spider, is a species of spider in the family Agelenidae. The common name comes from the place that it was described, Pennsylvania, and the funnel shape of its web. Its closest relative is '' Agelenopsis potteri''. ''Agelenopsis pennsylvanica'' lives primarily as a solitary spider across the United States, having been found in at least 21 different states. It is an ambush predator, sitting and waiting for prey in its funnel-shaped web. In this species, the female commonly cannibalizes the male during mating. This small species has been used to study pre-copulatory cannibalism, boldness, aggressive foraging behavior, and the influence of microbes in the reproductive cycle and mating behavior. Description Coloring The coloration of ''A. pennsylvanica'' is more visible in its carapace. The carapace has dark markings that are often faded. The sternum is typically a yellow- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
