Lizards are a diverse group of reptiles and are found worldwide. There are over 7,000 species, spanning all continents except Antarctica, as well as most oceanic island chains. The average lifespan is around 18 years. In addition, they are capable of a wide range of different movements, including jumping and crawling.
Average lifespan 파충류샵
The Squamata order includes reptiles, snakes and amphisbaenians. This order contains over ten thousand species, making it the second-largest class of extant vertebrates. Reptiles are scaled animals that are classified into two main orders: Amphibians and reptiles.
The average lifespan of a lizard varies greatly, largely depending on the species and its habitat. However, lizards in captivity can live as long as 20 years or more. This number is significantly higher if the lizard is given the proper care and attention.
Diet
A lizard’s diet is very important to its health. Lizards should be fed a variety of foods, but they should be primarily plant-based. Lizards eat fruit, vegetables, and insects. The amount of food they eat depends on their size, sex, and growth rate. Poor diets and improper husbandry can result in vitamin imbalances, starvation, and hepatitis. Supplemental vitamins can be given to help your pet get the right amount of vitamins and minerals. Most supplements are available in powder form and can be dusted on insects.
Diets vary in different species, but it is possible to compare lizard diets across different regions. Studies of lizards in different habitats have revealed that species are highly similar in terms of their food sources. This information is useful in understanding the ecological relationships of different lizard species.
Social interactions
The social interactions of lizards are often influenced by their environment. Lizards, like most reptiles, live in groups, or “neighbourhoods,” where the individuals share a common habitat. Some species are highly social and may form stable family groups. These families may contain one adult pair or multiple cohorts of offspring. This is particularly true for species that live in saturated habitats, where the limited number of refuges leads to refuge sharing. Moreover, the delay in juvenile dispersal may promote social associations among individuals.
In lizards, family relationships are crucial. Social pairs are often in constant contact with each other. In particular, males follow females at close ranges, within 30 cm of each other. They share a home range and refuges during nighttime. However, they may also interact with neighbors who do not form pairs.
Locomotion
Scientists at the Georgia Institute of Technology studied the locomotion of intermediate lizard species that have elongated bodies but short limbs. By using a multidisciplinary approach, the researchers were able to reveal a previously unknown range of body movements in lizards. This research not only deepens our understanding of evolution, but also has applications in advanced robotics designs.
The locomotor rib kinematics of lizards are similar to those of early amniotes, but they may not be ancestral to amniotes. Because of their relatively similar body forms, lizards have often been used as analogues for early amniotes.
Sexes
Sexes of lizards are based on a variety of features, including chromosome number and morphology. Although the number of diploid chromosomes is the same in both sexes, the morphology of the chromosomes varies greatly. XX/XY sex chromosomes have only been found in one species of lizard, the Tiliqua scincoides. XY chromosomes are missing from the Y chromosome and do not have the rDNA loci present on the X chromosome.
Temperature may also have a role in determining sex ratios. For example, the temperature of a particular habitat may affect the number of males in a population and in a clutch of eggs. However, sex ratios of lizards are largely unknown.
Placentae
Lizard placentas can be complex and have multiple compartments. These organs play a pivotal role during pregnancy, providing nutrients and oxygen to the developing embryo. Some reptiles have complex placentae that provide all the nutrients to the embryo before it is born, while others have simple placentae that provide only oxygen to the embryo. An intermediate type of placenta can be found in the Australian southern grass skink, which lives in the coldest parts of Australia.
Placentae of lizards are complex and show a wide variety of morphological and physiological changes during the course of pregnancy. In viviparous squamates, the placentas are classified into two major placental regions, the chorioallantoic placenta and the omphaloplacenta. The chorioallantoic placemtal region is located in the embryonic hemisphere of the egg, where it provides oxygenated blood for the developing embryo.