Urothoe Hesperiae
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Urothoe Hesperiae
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *''Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *''Urothoe bairdii'' Bate, 1862 *''Urothoe b ...
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Urothoe Brevicornis
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *'' Urothoe brevi ...
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Sexual Maturity
Sexual maturity is the capability of an organism to reproduce. In humans it might be considered synonymous with adulthood, but here puberty is the name for the process of biological sexual maturation, while adulthood is based on cultural definitions. Most multicellular organisms are unable to sexually reproduce at birth (animals) or germination (e.g. plants): depending on the species, it may be days, weeks, or years until they have developed enough to be able to do so. Also, certain cues may trigger an organism to become sexually mature. They may be external, such as drought (certain plants), or internal, such as percentage of body fat (certain animals). (Such internal cues are not to be confused with hormones, which directly produce sexual maturity – the production/release of those hormones is triggered by such cues.) Role of reproductive organs Sexual maturity is brought about by a maturing of the reproductive organs and the production of gametes. It may also be accompanied ...
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Urothoe Cuspis
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Coxalis
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Corsica
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Convexa
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Chosani
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Carda
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Bairdii
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *'' Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Urothoe Atlantica
''Urothoe'' is a genus of very small marine amphipod crustaceans in the family Urothoidae. Members of the genus are found worldwide. Biology Urothods are long and live on the sea bed or in shallow burrows in gravelly substrates or muddy sand. They can swim for short distances. They are vulnerable to dredging but are able to recover afterwards and re-establish their burrows. They are deposit feeders and also selectively scrape microorganisms from grains of sand. Reproduction ''Urothoe'' reaches sexual maturity at five months and may live for about a year. The sexes are distinct and breeding takes place in the summer months. Fertilisation is internal and there are about fifteen eggs per brood, produced in a cycle of about fifteen days. Fecundity is high and the juveniles grow fast but biological dispersal is very limited. Species ''Urothoe'' contains the following species: *'' Urothoe atlantica'' Bellan-Santini & Menioui, 2004 *''Urothoe bairdii'' Bate, 1862 *''Urothoe ...
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Biological Dispersal
Biological dispersal refers to both the movement of individuals (animals, plants, fungi, bacteria, etc.) from their birth site to their breeding site ('natal dispersal'), as well as the movement from one breeding site to another ('breeding dispersal'). Dispersal is also used to describe the movement of propagules such as seeds and spores. Technically, dispersal is defined as any movement that has the potential to lead to gene flow. The act of dispersal involves three phases: departure, transfer, settlement and there are different fitness costs and benefits associated with each of these phases. Through simply moving from one habitat patch to another, the dispersal of an individual has consequences not only for individual fitness, but also for population dynamics, population genetics, and species distribution. Understanding dispersal and the consequences both for evolutionary strategies at a species level, and for processes at an ecosystem level, requires understanding on th ...
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Juvenile (organism)
A juvenile is an individual organism that has not yet reached its adult form, sexual maturity or size. Juveniles can look very different from the adult form, particularly in colour, and may not fill the same niche as the adult form. In many organisms the juvenile has a different name from the adult (see List of animal names). Some organisms reach sexual maturity in a short metamorphosis, such as eclosion in many insects. For others, the transition from juvenile to fully mature is a more prolonged process—puberty in humans and other species, for example. In such cases, juveniles during this transformation are sometimes called subadults. Many invertebrates, on reaching the adult stage, are fully mature and their development and growth stops. Their juveniles are larvae or nymphs. In vertebrates and some invertebrates (e.g. spiders), larval forms (e.g. tadpoles) are usually considered a development stage of their own, and "juvenile" refers to a post-larval stage that is not full ...
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