ADAPTATIONS IN CAVE-DWELLING ANIMALS
نویسندگان
چکیده
منابع مشابه
Speciation in cave-dwelling organisms
system for testing evolutionary and biogeographic hypotheses because of their isolation, simplicity of community structure and specialization. Adaptation to cave environments promotes the regression of functionless (unused) characters across a broad taxonomic range, in concert with evolutionary change in other morphological traits. Change typically involves the degeneration of eyes and loss of ...
متن کاملMetabolic Adaptations in Higher Animals
There is a marked increase in the liver glucose 6-phosphatase activity’ of rats fed a diet devoid of a direct source of glucose (1). Also the ingestion of a glucose-free diet containing a high level of protein or fructose causes an increase in liver fructose 1,6-diphosphatase activity in rabbits (2). I f these findings are not special cases, but are representative of a general phenomenon, infor...
متن کاملMetabolic Adaptations in Higher Animals
Ingestion of a diet containing 40 per cent or more of sucrose causes a rapid rise in liver glucose-6-phosphatase activity1 in the rat (1). The high enzyme activity, which has been interpreted as an adaptive response, is maintained for several weeks at least, if the rat is kept on a diet high in sucrose (2). The glucase-6-phosphatase adaptation is thought to be a result of enzyme synthesis rathe...
متن کاملSeasonal variation of cave-dwelling phlebotomine sandflies (Diptera:Psychodidae) in Phra Phothisat Cave, Saraburi Province, Thailand.
Phlebotomine sandflies are widely distributed in Thailand. In view of recent occurrence of indigenous cases of leishmaniasis in Thailand, a bionomic study of sandflies was undertaken in Phra Phothisat cave, Saraburi Province, Thailand from August 2005 to July 2006. The insects were collected monthly by CDC light traps between 06:00 PM and 06:00 AM. They were preserved in 80% alcohol and mounted...
متن کاملSex Recognition in Surfaceand Cave Dwelling Male Atlanticmollies Poecilia Mexicana
ŽAnimals colonizing lightless subterranean habitats can no longer rely on visual signals to find mating partners. In the present study, we investigated the ability of males to recognize females in two surface and a cave dwelling population of a livebearing fish, Poecilia mexicana. In surface populations males discriminated between sexes with visual plus non-visual cues available and with visual...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science
سال: 1896
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.4.85.192