Gusano de tierra o lombriz de tierra, La lombriz de tierra, de color gris rojizo, es un animal familiar para todo aquel que tenga un jardín o una caña de pescar. Es oriunda de Europa, pero en la actualidad abunda también en Norteamérica y en Asia occidental.
Aunque por lo general apenas mide 7 u 8 centímetros, se sabe
que algunos miembros de la especie alcanzan hasta 35 centímetros de longitud
con el cuerpo enrollado. El cuerpo de la lombriz de tierra está formado por
segmentos llamados anillos o metámeros. Estos segmentos están recubiertos de
sedas, o pequeñas cerdas, que la lombriz usa para remover y escarbar la tierra.
En Estados Unidos se la conoce con el nombre de nightcrawler
(buscadora nocturna) porque es frecuente verlas por la noche alimentándose sobre
la superficie de la tierra. Durante el día permanecen bajo tierra-manteniéndose
por lo general próximas a la superficie-, y son capaces de cavar hasta una
profundidad de 2 metros.
La lombriz tiene la boca en el primer segmento del cuerpo. A
medida que cava la tierra la va ingiriendo, extrayendo de ella nutrientes que
provienen de la descomposición de materia orgánica, como hojas o raíces. La
lombriz de tierra es vital para la salud del suelo, ya que transporta
nutrientes y minerales hasta la superficie mediante sus desechos y los túneles
que excava oxigenan la tierra.
Nombre científico:
Lumbricus terrestres
Hábitat
El hábitat de la lombriz es la tierra húmeda, aunque algunas
prefieren el barro, como aquel que se encuentra a lo largo de las orillas de
los lagos o pantanos. Las lombrices de tierra se pueden encontrar en el suelo
de los patios y también cerca de los cuerpos de agua dulce y salada. Muchas
viven en la capa superior del suelo, mientras que otras se encuentran a mayor
profundidad. En las regiones tropicales, las lombrices de tierra incluso pueden
encontrarse en la tierra que se encuentra en las ramas de los árboles.
Alimentación: Se alimentan de las bacterias que viven
en el musgo, en la tierra humedad que tiene elementos como, restos de frutas u
hojas secas, restos de madera, y demás.
Características:
- Son animales de Simetría BILATERAL.
- Carecen de EXOESQUELETO. La Pared de su cuerpo está
formada por un Saco Músculocotáneo.
- Poseen Aparato Digestivo SIMPLE, sin Glándulas anexas.
- El Aparato Circulatorio es VASCULAR CERRADO.
- Poseen Respiración CUTÁNEA.
- El Aparato Excretor es SEGMENTADO. Presenta NEFRIDIOS o
Riñones rudimentarios en cada uno de los segmentos.
- El Sistema Nervioso es SEGMENTADO y es Ganglionar Ventral.
- Se reproducen Sexualmente. Son HERMAFRODITAS, pero no se
auto fecundan.
Reproducción:
Su apareamiento se produce generalmente cuando asoman a
comer a la superficie. La puesta de huevos se realiza a razón de un cocón por
animal cada 45 a 60 días.
Estas lombrices son muy prolíficas. Se aparean semanalmente,
poniendo un cocón por lombriz cada diez días, refiriéndonos siempre a lombrices
adultas. Estos huevos eclosionan a las 2 ó 3 semanas de puestos y dan a luz
entre 2 y 20 lombrices cada uno. Estas recién nacidas alcanzan la madurez
sexual luego de 6 a 10 semanas.
La lombriz es hermafrodita insuficiente (tiene ambos sexos,
pero necesita aparearse para reproducirse).
La lombriz de tierra es hermafrodita incompleta, cada
individuo posee espermatozoides y óvulos. Su sistema reproductor consta de
órganos masculinos y femeninos dispuestos en la región ventral entre los
segmentos 9 y 14.
La unión sexual se realiza por las noches y puede durar
hasta 4 horas. Después las dos se separan ya fecundadas.
La lombriz de tierra puede producir una cápsula cada 7 - 10
días.
La cápsula incubará por aproximadamente 14 a 21 días.
Earthworm .
Earthworms or earthworm, the earthworm, reddish- gray color,
is an animal familiar to anyone who has a garden or a fishing rod . It is
native to Europe, but now also abundant in North America and Western Asia.
Although usually measures only 7 or 8 inches , it is known that some members of the species reaching up to 35 inches in length with the body coiled . The body of the earthworm consists of rings or segments called metamers . These segments are coated silk , or small bristles , the worm used to remove the dirt and scratching .
In the United States it is known by the name of nightcrawler (Night Seeker ) because it is common to see them at night feeding on the surface of the earth. During the day they remain underground, usually staying near the surface , and are capable of digging to a depth of 2 meters.
The worm 's mouth is the first body segment. As the earth goes cava taking, extracting from it nutrients from the decomposition of organic matter such as leaves or roots . The earthworm is vital to soil health because it carries nutrients and minerals to the surface by their waste and oxygenate tunnels dug earth.
Although usually measures only 7 or 8 inches , it is known that some members of the species reaching up to 35 inches in length with the body coiled . The body of the earthworm consists of rings or segments called metamers . These segments are coated silk , or small bristles , the worm used to remove the dirt and scratching .
In the United States it is known by the name of nightcrawler (Night Seeker ) because it is common to see them at night feeding on the surface of the earth. During the day they remain underground, usually staying near the surface , and are capable of digging to a depth of 2 meters.
The worm 's mouth is the first body segment. As the earth goes cava taking, extracting from it nutrients from the decomposition of organic matter such as leaves or roots . The earthworm is vital to soil health because it carries nutrients and minerals to the surface by their waste and oxygenate tunnels dug earth.
Scientific name:
Lumbricus terrestres
Lumbricus terrestres
habitat
Earthworm habitat is moist soil, although some prefer the mud, like that found along the shores of lakes or swamps. Earthworms can be found on the floor of the courtyards and near bodies of fresh and salt water. Many live in the topsoil, while others are deeper. In tropical regions, earthworms can even be found in the land that is in the tree branches.
Earthworm habitat is moist soil, although some prefer the mud, like that found along the shores of lakes or swamps. Earthworms can be found on the floor of the courtyards and near bodies of fresh and salt water. Many live in the topsoil, while others are deeper. In tropical regions, earthworms can even be found in the land that is in the tree branches.
Food: They feed on bacteria that live in the moss
on the soil moisture has elements such as traces of
nuts or dried leaves, wood debris, and others.
Features:
- Pets are BILATERAL symmetry .
- Lack EXOSKELETON . The body wall is formed by a Saco Músculocotáneo .
- Possess Digestive SIMPLE , without accompanying glands .
- The Circulatory VASCULAR is CLOSED .
- They have breathing SKIN .
- The Excretory Apparatus is TARGETED . Kidneys Nephridia or rudimentary presented in each of the segments .
- The Nervous System and Lymph Node is Ventral SEGMENT .
- Sexually are played. Are hermaphroditic but not self fertilizing .
- Lack EXOSKELETON . The body wall is formed by a Saco Músculocotáneo .
- Possess Digestive SIMPLE , without accompanying glands .
- The Circulatory VASCULAR is CLOSED .
- They have breathing SKIN .
- The Excretory Apparatus is TARGETED . Kidneys Nephridia or rudimentary presented in each of the segments .
- The Nervous System and Lymph Node is Ventral SEGMENT .
- Sexually are played. Are hermaphroditic but not self fertilizing .
Reproduction:
Their mating usually occurs when eating poke the surface.
Spawning takes place at a rate of cocoon per animal every 45 to 60 days.
These worms are very prolific . They mate every week , putting a worm cocoon for every ten days , always referring to adult worms . These eggs hatch in 2 to 3 weeks of posts and give birth between 2 and 20 worms each. These newborn reach sexual maturity after 6-10 weeks.
The earthworm is hermaphrodite inadequate ( having both sexes, but need to mate to reproduce) .
The earthworm is hermaphroditic incomplete, each individual has sperm and eggs . Your reproductive system consists of male and female bodies arranged in the ventral region between segments 9 and 14.
Sexual union is done at night and can last up to 4 hours. After the two are separated and fertilized .
The earthworm can produce a capsule every 7-10 days.
The capsule incubate for approximately 14 to 21 days .
These worms are very prolific . They mate every week , putting a worm cocoon for every ten days , always referring to adult worms . These eggs hatch in 2 to 3 weeks of posts and give birth between 2 and 20 worms each. These newborn reach sexual maturity after 6-10 weeks.
The earthworm is hermaphrodite inadequate ( having both sexes, but need to mate to reproduce) .
The earthworm is hermaphroditic incomplete, each individual has sperm and eggs . Your reproductive system consists of male and female bodies arranged in the ventral region between segments 9 and 14.
Sexual union is done at night and can last up to 4 hours. After the two are separated and fertilized .
The earthworm can produce a capsule every 7-10 days.
The capsule incubate for approximately 14 to 21 days .
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