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Cathemeral
Cathemerality, sometimes called metaturnality, is an organismal activity pattern of irregular intervals during the day or night in which food is acquired, socializing with other organisms occurs, and any other activities necessary for livelihood are undertaken. This activity differs from the generally monophasic pattern (sleeping once per day) of nocturnal and diurnal species as it is polyphasic (sleeping 4-6 times per day) and is approximately evenly distributed throughout the 24-hour cycle. Many animals do not fit the traditional definitions of being strictly nocturnal, diurnal, or crepuscular, often driven by factors that include the availability of food, predation pressure, and variable ambient temperature. Although cathemerality is not as widely observed in individual species as diurnality or nocturnality, this activity pattern is seen across the mammal taxa, such as in lions, coyotes, and lemurs. Cathemeral behaviour can also vary on a seasonal basis over an annual per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nocturnality
Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed senses of hearing, smell, and specially adapted eyesight. Some animals, such as cats and ferrets, have eyes that can adapt to both low-level and bright day levels of illumination (see metaturnal). Others, such as bushbabies and (some) bats, can function only at night. Many nocturnal creatures including tarsiers and some owls have large eyes in comparison with their body size to compensate for the lower light levels at night. More specifically, they have been found to have a larger cornea relative to their eye size than diurnal creatures to increase their : in the low-light conditions. Nocturnality helps wasps, such as ''Apoica flavissima'', avoid hunting in intense sunlight. Diurnal animals, including squirrels and songbirds, are active d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nocturnal Animal
Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed senses of hearing, smell, and specially adapted eyesight. Some animals, such as cats and ferrets, have eyes that can adapt to both low-level and bright day levels of illumination (see metaturnal). Others, such as bushbabies and (some) bats, can function only at night. Many nocturnal creatures including tarsiers and some owls have large eyes in comparison with their body size to compensate for the lower light levels at night. More specifically, they have been found to have a larger cornea relative to their eye size than diurnal creatures to increase their : in the low-light conditions. Nocturnality helps wasps, such as ''Apoica flavissima'', avoid hunting in intense sunlight. Diurnal animals, including squirrels and songbirds, are active duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diurnal Animal
Diurnality is a form of plant and animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night. The common adjective used for daytime activity is "diurnal". The timing of activity by an animal depends on a variety of environmental factors such as the temperature, the ability to gather food by sight, the risk of predation, and the time of year. Diurnality is a cycle of activity within a 24-hour period; cyclic activities called circadian rhythms are endogenous cycles not dependent on external cues or environmental factors except for a zeitgeber. Animals active during twilight are crepuscular, those active during the night are nocturnal and animals active at sporadic times during both night and day are cathemeral. Plants that open their flowers during the daytime are described as diurnal, while those that bloom during nighttime are nocturnal. The timing of flower opening is often related to the time at which preferred pollinato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diurnality
Diurnality is a form of plant and ethology, animal behavior characterized by activity during daytime, with a period of sleeping or other inactivity at night. The common adjective used for daytime activity is "diurnal". The timing of activity by an animal depends on a variety of environmental factors such as the temperature, the ability to gather food by sight, the risk of predation, and the time of year. Diurnality is a cycle of activity within a 24-hour period; cyclic activities called circadian rhythms are endogenous cycles not dependent on external cues or environmental factors except for a zeitgeber. Animals active during twilight are crepuscular, those active during the night are nocturnal and animals active at sporadic times during both night and day are cathemerality, cathemeral. Plants that open their flowers during the daytime are described as diurnal, while those that bloom during nighttime are nocturnal. The timing of flower opening is often related to the time at which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Brown Lemur
The common brown lemur (''Eulemur fulvus'') is a species of lemur in the family Lemuridae. It is found in Madagascar and has been introduced to Mayotte. Taxonomy Five additional currently recognized species of lemur were until 2001 considered subspecies of ''E. fulvus''. These are: * White-fronted brown lemur, ''E. albifrons'' *Gray-headed lemur, ''E. cinereiceps'' *Collared brown lemur, ''E. collaris'' *Red-fronted brown lemur, ''E. rufus'' *Sanford's brown lemur, ''E. sanfordi'' However, a number of zoologists believe that ''E. albifrons'' and ''E. rufus'' should continue to be considered subspecies of ''E. fulvus''. Physical description The common brown lemur has a total length of , including of tail. Weight ranges from . Common brown lemurs are unique amongst ''Eulemur'' in that they exhibit little-to-no sexual dichromatism: in both males and females, the face, muzzle and crown are dark gray or black, with white or tan "cheeks" of varying thickness. Some individuals may h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Brown Lemur
The common brown lemur (''Eulemur fulvus'') is a species of lemur in the family Lemuridae. It is found in Madagascar and has been introduced to Mayotte. Taxonomy Five additional currently recognized species of lemur were until 2001 considered subspecies of ''E. fulvus''. These are: * White-fronted brown lemur, ''E. albifrons'' *Gray-headed lemur, ''E. cinereiceps'' *Collared brown lemur, ''E. collaris'' *Red-fronted brown lemur, ''E. rufus'' *Sanford's brown lemur, ''E. sanfordi'' However, a number of zoologists believe that ''E. albifrons'' and ''E. rufus'' should continue to be considered subspecies of ''E. fulvus''. Physical description The common brown lemur has a total length of , including of tail. Weight ranges from . Common brown lemurs are unique amongst ''Eulemur'' in that they exhibit little-to-no sexual dichromatism: in both males and females, the face, muzzle and crown are dark gray or black, with white or tan "cheeks" of varying thickness. Some individuals may h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Brown Lemur (Eulemur Fulvus) Male
The common brown lemur (''Eulemur fulvus'') is a species of lemur in the family Lemuridae. It is found in Madagascar and has been introduced to Mayotte. Taxonomy Five additional currently recognized species of lemur were until 2001 considered subspecies of ''E. fulvus''. These are: * White-fronted brown lemur, ''E. albifrons'' *Gray-headed lemur, ''E. cinereiceps'' *Collared brown lemur, ''E. collaris'' * Red-fronted brown lemur, ''E. rufus'' *Sanford's brown lemur, ''E. sanfordi'' However, a number of zoologists believe that ''E. albifrons'' and ''E. rufus'' should continue to be considered subspecies of ''E. fulvus''. Physical description The common brown lemur has a total length of , including of tail. Weight ranges from . Common brown lemurs are unique amongst ''Eulemur'' in that they exhibit little-to-no sexual dichromatism: in both males and females, the face, muzzle and crown are dark gray or black, with white or tan "cheeks" of varying thickness. Some individuals may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermoregulation
Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature is very different. A thermoconforming organism, by contrast, simply adopts the surrounding temperature as its own body temperature, thus avoiding the need for internal thermoregulation. The internal thermoregulation process is one aspect of homeostasis: a state of dynamic stability in an organism's internal conditions, maintained far from thermal equilibrium with its environment (the study of such processes in zoology has been called physiological ecology). If the body is unable to maintain a normal temperature and it increases significantly above normal, a condition known as hyperthermia occurs. Humans may also experience lethal hyperthermia when the wet bulb temperature is sustained above for six hours. The opposite condition, when body temperature decreases below normal levels, is known as hypothermia. It results when the homeostatic c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crepuscular
In zoology, a crepuscular animal is one that is active primarily during the twilight period, being matutinal, vespertine, or both. This is distinguished from diurnal and nocturnal behavior, where an animal is active during the hours of daylight and of darkness, respectively. Some crepuscular animals may also be active by moonlight or during an overcast day. Matutinal animals are active only before sunrise, and vespertine only after sunset. A number of factors impact the time of day an animal is active. Predators hunt when their prey is available, and prey try to avoid the times when their principal predators are at large. The temperature at midday may be too high or at night too low. Some creatures may adjust their activities depending on local competition. Etymology and usage The word ''crepuscular'' derives from the Latin '' crepusculum'' ("twilight"). Its sense accordingly differs from diurnal and nocturnal behavior, which respectively peak during hours of daylight and da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden-lined Spinefoot
The golden-lined spinefoot (''Siganus lineatus''), also known as the goldlined rabbitfish or lined rabbitfish, is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found in the tropical Western Pacific and along the coasts of northern Australia. Taxonomy The golden-lined spinefoot was first formally described in 1835 as ''Amphacanthus lineatus'' by the French zoologist Achille Valenciennes with the type locality given as the Western Pacific. The populations of spinefoots similar to ''Siganus lineatus'' in the waters off the Maldives, southern India and Sr Lanka had been considered to be conspecific with ''S. lineatus'' but differences in the colour and pattern as well as genetic differences showed that this was a valid, allopatric species, '' S. insomnis''. The specific name ''lineatus'' means "lined", a reference to the wavy bands along its body. Description The golden-lined spinefoot has a laterally compressed body, which has a depth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siganus Lineatus
The golden-lined spinefoot (''Siganus lineatus''), also known as the goldlined rabbitfish or lined rabbitfish, is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found in the tropical Western Pacific and along the coasts of northern Australia. Taxonomy The golden-lined spinefoot was first formally described in 1835 as ''Amphacanthus lineatus'' by the French zoologist Achille Valenciennes with the type locality given as the Western Pacific. The populations of spinefoots similar to ''Siganus lineatus'' in the waters off the Maldives, southern India and Sr Lanka had been considered to be conspecific with ''S. lineatus'' but differences in the colour and pattern as well as genetic differences showed that this was a valid, allopatric species, '' S. insomnis''. The specific name ''lineatus'' means "lined", a reference to the wavy bands along its body. Description The golden-lined spinefoot has a laterally compressed body, which has a depth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
