iteroparous การใช้

• Within iteroparous fish, they usually give no parental care with external fertilization.
• An iteroparous organism is one that can undergo many reproductive events throughout its lifetime.
• Perennials live for more than one season and are usually ( but not always ) iteroparous.
• Iteroparous vertebrates include all birds, most reptiles, virtually all mammals, and most fish.
• However, most perennials are polycarpic ( or iteroparous ), flowering over many seasons in their lifetime.
• Among invertebrates, most mollusca and many insects ( for example, mosquitoes and cockroaches ) are iteroparous.
• In his analysis, Cole assumed that there was no mortality of individuals of the iteroparous species, even seedlings.
• These fish are iteroparous, capable of spawning multiple times during their lifespan, and many will return to Lake Ontario after spawning.
• A species is semelparous if its individuals spawn only once in their lifetime, and iteroparous if its individuals spawn more than once.
• Fishes can be iteroparous, and spawn more than once, but there are some who only spawn once before death, known as semelparous.
• In iteroparous species, where individuals may go through several reproductive bouts during their lifetime, a tradeoff may exist between investment in current offspring and future reproduction.
• The antonym is polycarpic, a plant that flowers and sets seeds many times during its lifetime; the antonym of semelparous is " iteroparous ".
• Some species of salmon are semelparous ( they have a single reproductive bout before death ) whereas others are iteroparous ( they spawn multiple times after maturation ).
• The pig is an example of an iteroparous organismThe term iteroparity comes from the Latin " itero ", to repeat, and " pario ", to beget.
• An example of an iteroparous organism is a human though people may choose only to have one child, humans are biologically capable of having offspring many times over the course of their lives.
• Generally, semelparity is considered to be a beneficial tradeoff in some situations where the species can have higher population growth ( and higher fecundity ) via a semelparous strategy than an iteroparous one.
• In any iteroparous population there will be some individuals who die between their first and second reproductive episodes, but unless this is part of a syndrome of programmed death after reproduction, this would not be called semelparity.
• In iteroparous cases, at least in Atlantic salmon, the kype is not fully resorbed after the breeding season, although basal parts of the kype skeleton are re-modelled into regular dentary bone . some fish never lose their kype.
• Unlike the various Pacific salmon species which die after spawning ( semelparous ), the Atlantic salmon is iteroparous, which means the fish may recondition themselves and return to the sea to repeat the migration and spawning pattern several times, although most spawn only once or twice.
• Similar to Atlantic salmon, but unlike their Pacific " Oncorhynchus " salmonid kin, steelhead are iteroparous ( able to spawn several times, each time separated by months ) and make several spawning trips between fresh and salt water, although fewer than 10 percent of native spawning adults survive from one spawning to another.