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Filial Cannibalism In Fish
Filial cannibalism occurs when an adult individual of a species consumes all or part of the young of its own species or immediate offspring. Filial cannibalism occurs in many species ranging from mammals to insects, and is especially prevalent in various types of fish species with males that engage in egg guardianship. The exact purpose of the practice in those species is uncertain, but zoologists have proposed several explanations based on evolutionary and ecological principles. Types Total Total or whole clutch cannibalism occurs when a parent consumes its entire brood. This usually occurs when a brood is small or of lower quality. The most obvious purpose of total or whole clutch cannibalism is the termination of care for the parents. The main benefit of this action can only be an investment in the future reproduction of potentially larger or healthier broods. Partial Partial clutch cannibalism occurs when a parent consumes a part of its offspring. "Parental manipulation of br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Offspring
In biology, offspring are the young creation of living organisms, produced either by sexual reproduction, sexual or asexual reproduction. Collective offspring may be known as a brood or progeny. This can refer to a set of simultaneous offspring, such as the chick (young bird), chicks hatched from one clutch (eggs), clutch of eggs, or to all offspring produced over time, as with the brood (honeybee), honeybee. Offspring can occur after mating, artificial insemination, or as a result of cloning. Human offspring (lineal descendant, descendants) are referred to as children; male children are sons and female children are daughters (see Kinship). Overview Offspring contains many parts and properties that are precise and accurate in what they consist of, and what they define. As the offspring of a new species, also known as a child or f1 generation, consist of genes of the father and the mother, which is also known as the parent generation. Each of these offspring contains numerous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bees
Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are currently considered a clade, called Anthophila. There are over 20,000 known species of bees in seven recognized biological families. Some speciesincluding honey bees, bumblebees, and stingless beeslive socially in colonies while most species (>90%)including mason bees, carpenter bees, leafcutter bees, and sweat beesare solitary. Bees are found on every continent except Antarctica, in every habitat on the planet that contains insect-pollinated flowering plants. The most common bees in the Northern Hemisphere are the Halictidae, or sweat bees, but they are small and often mistaken for wasps or flies. Bees range in size from tiny stingless bee species, whose workers are less than long, to the leafcutter bee '' Megach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assassin Bug
The Reduviidae is a large cosmopolitan family of the suborder Heteroptera of the order Hemiptera (true bugs). Among the Hemiptera and together with the Nabidae almost all species are terrestrial ambush predators; most other predatory Hemiptera are aquatic. The main examples of non-predatory Reduviidae are some blood-sucking ectoparasites in the subfamily Triatominae, with a few species from South America noted for their ability to transmit Chagas disease. Though spectacular exceptions are known, most members of the family are fairly easily recognizable: they have a relatively narrow neck, sturdy build, and formidable curved proboscis (sometimes called a rostrum). Large specimens should be handled with caution, if at all, because they sometimes defend themselves with a very painful stab from the proboscis. Taxonomy The family members are almost all predatory, except for a few blood-sucking species, some of which are important as disease vectors. About 7000 species have been des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brood Parasite
Brood may refer to: Nature * Brood, a collective term for offspring * Brooding, the incubation of bird eggs by their parents * Bee brood, the young of a beehive * Individual broods of North American periodical cicadas: ** Brood X, the largest brood, which emerges on a 17-year cycle ** Brood XIII, a brood centered on Northern Illinois and its surrounding area, which also emerges on a 17-year cycle ** Brood XIX, a large brood in the Southern United States which emerges on a 13-year cycle People with the surname * Herman Brood (1946–2001), Dutch musician, painter, actor, poet and media personality * Philippe Brood (1964–2000), Dutch politician Entertainment * '' The Brood'', a 1979 horror film directed by David Cronenberg * Brood (comics), an alien species from the Marvel Comics universe * The Brood (professional wrestling) The Brood was a List of professional wrestling terms#Stable, stable known for its time in the WWE, World Wrestling Federation (WWF, now WWE) duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicrophorus Vespilloides
''Nicrophorus vespilloides'' is a burying beetle described by Johann Friedrich Wilhelm Herbst in 1783. The beetles vary widely in size and can present with a range of anywhere from 12 mm to 20 mm in size. They have two conspicuous orange-yellow bands on the elytra. The color of the antennae are an important distinguishing feature, being totally black. The color of their orange and black markings is multifunctional, as they are conspicuous to avian predators. In general, they present a unique ecological niche, which is their evolution of aposematism, or the strategy they use to warn predators through their conspicuous signals. The wing cases of these beetles possess a squarish shape and are notably shorter in length than their abdomens, indicating a distinct physical characteristic of the species. Overall, there are reported differences in coloration and chemical defenses among the sexes. This is hypothesized to stem from conflicting selection pressures for the different sexes. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burying Beetle
Burying beetles or sexton beetles, genus ''Nicrophorus'', are the best-known members of the family Silphidae (carrion beetles). Most of these beetles are black with red markings on the Elytron, elytra (forewings). Burying beetles are true to their name—they bury the carcasses of small vertebrates such as birds and rodents as a Necrophagy, food source for their larvae; this makes them carnivorous. They are unusual among insects in that both the male and female parents take Bi-parental care, care of the brood. The genus name is sometimes spelled ''Necrophorus'' in older texts: this was an unjustified Emendation (taxonomy), emendation by Carl Peter Thunberg (1789) of Fabricius's original name, and is not valid under the ICZN. The American burying beetle (''Nicrophorus americanus'') has been on the U.S. Endangered species, endangered species list since 1989. This species was native to 35 U.S. states but now is only known to exist in 9. Reproduction Burying beetles have large clu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brood Reduction
Brood reduction occurs when the number of nestlings in a birds brood is reduced, usually because there is a limited amount of resources available. It can occur directly via infanticide, or indirectly via competition over resources between siblings. Avian parents often produce more offspring than they can care for, resulting in the death of some of the nestlings. Brood reduction was originally described by David Lack in his brood-reduction hypothesis to explain the existence of hatching asynchrony in many bird species. Hatching asynchrony occurs when the parents start incubating their eggs before all of them have been laid. If resources are limited, it benefits the parents to allow brood reduction, because it reduces the amount of work they must do and increases their chances of surviving and reproducing again in future years. Brood reduction has been observed in many avian species including seabirds such as black-legged kittiwakes, birds of prey such as Swainson's hawk and several ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fantail Darter
The fantail darter (''Etheostoma flabellare'') is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is widely distributed across streams in North America. Distribution and habitat The fantail darter is distributed across much of eastern North America, from the Great Lakes and the Mississippi River basins to South Carolina and northern Alabama, in small streams. They can be found as far west as northeastern Oklahoma. These darters, like many others, live in smaller streams. Due to their breeding habits, they are found in areas of the stream with cobbles and flat stones. These fish are especially abundant near large slabs of limestone or shale. Partly because of their wide range of habitats, fantail darters have not been labelled as endangered. It is well-adapted for stream life, and the environmental changes that occur in streams as the seasons change. Cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Androgen
An androgen (from Greek ''andr-'', the stem of the word meaning ) is any natural or synthetic steroid hormone that regulates the development and maintenance of male characteristics in vertebrates by binding to androgen receptors. This includes the embryological development of the primary male sex organs, and the development of male secondary sex characteristics at puberty. Androgens are synthesized in the testes, the ovaries, and the adrenal glands. Androgens increase in both males and females during puberty. The major androgen in males is testosterone. Dihydrotestosterone (DHT) and androstenedione are of equal importance in male development. DHT ''in utero'' causes differentiation of the penis, scrotum and prostate. In adulthood, DHT contributes to balding, prostate growth, and sebaceous gland activity. Although androgens are commonly thought of only as male Sex steroids, sex hormones, females also have them, but at lower levels: they function in libido and sexual arousal. An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhabdoblennius Nitidus
''Rhabdoblennius nitidus'', the barred-chin blenny, is a species of combtooth blenny found in coral reefs in the western Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ... ocean. This species reaches a length of SL. References nitidus Taxa named by Albert Günther Fish described in 1861 {{Blenniidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blenniiformes
Blenniiformes is an order of percomorph fish in the clade Ovalentaria, of which it is the most diverse group. This order contains several well-known fish groups such as blennies and damselfish. The term is derived from the Latin word '' blennius'', which itself comes from the Ancient Greek word βλεννός (''blennos''), meaning "mucus" or "slime." This refers to the slimy coating that is often found on the scales of blenny fish. The earliest known member of this order is the stem group-damselfish '' Chaychanus'' from the Early Paleocene of Mexico. Taxonomy As with many other percomorphs, most members of this group were originally placed in the Perciformes. Previously, ''Fishes of the World'' defined this order as restricted to the blennies and their close relatives, and placed several taxa such as the damselfishes, jawfishes, and surfperches as indeterminate members of Ovalentaria. Phylogenetic evidence suggests that these families form a successive grade leading to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paternal Care
In biology, paternal care is parental investment provided by a male to his own offspring. It is a complex social behavior in vertebrates associated with animal mating systems, life history traits, and ecology. Paternal care may be provided in concert with the mother (biparental care) or, more rarely, by the male alone (exclusive paternal care). The provision of care, by either males or females, is presumed to increase growth rates, quality, and/or survival of the young, ultimately increasing the inclusive fitness of the parents. In a variety of vertebrate species (e.g., about 80% of birds and about 6% of mammals), both males and females invest heavily in their offspring. Many of these bi-parental species are socially Monogamy, monogamous, so individuals remain with their mate for at least one breeding season. Exclusive paternal care has evolved multiple times in a variety of organisms, including invertebrates, fishes, and amphibians. Mammals Male mammals employ different beh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
