Induction of Cytochrome P450 1A (CYP1A) in larvae of the three-spined stickleback (Gasterosteus aculeatus L.)
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Geography of the circadian gene clock and photoperiodic response in western North American populations of the three-spined stickleback Gasterosteus aculeatus.
Controlled laboratory experiments were used to show that Oregon and Alaskan three-spined stickleback Gasterosteus aculeatus, collected from locations differing by 18° of latitude, exhibited no significant variation in length of the polyglutamine domain of the clock protein or in photoperiodic response within or between latitudes despite the fact that male and female G. aculeatus are photoperiod...
متن کاملGonadal effects of melatonin in the three-spined stickleback, Gasterosteus aculeatus L., during different seasons and photoperiods.
Males and females of the three-spined stickleback, Gasterosteus aculeatus L., were given melatonin injections (0.8 or 4 micrograms/day) at different seasons and under different photoperiods (8L: 16D and 16L: 8D). Long photoperiods stimulated reproduction in November and January, whereas maturation in both sexes in March/April and ovarian regression in July were only negligibly affected by light...
متن کاملA new ELISA for the three-spined stickleback (Gasterosteus aculeatus L.) spiggin, using antibodies against synthetic peptide.
The aim of this study was to develop an enzyme-linked immunosorbent (ELISA) assay to quantify spiggin in the three-spined stickleback. Spiggin is a glue protein produced in the kidney of male three-spined stickleback under the control of androgens during the breeding period. Disturbances of spiggin production in male fish and abnormal induction of spiggin in female fish are considered as valuab...
متن کاملLatitudinal variation in photoperiodic response of the three-spined stickleback Gasterosteus aculeatus in western North America.
Reproductive maturation in both male and female three-spined stickleback Gasterosteus aculeatus was strongly photoperiodic in a northern population (Alaska, 61 degrees N) but not in a southern population (Oregon, 43 degrees N) from western North America. Increasing reliance on photoperiod with increasing latitude is a general phenomenon among vertebrates, and is probably due to the anticipation...
متن کاملThe role of calcium and predation on plate morph evolution in the three-spined stickleback (Gasterosteus aculeatus)
While the genetic basis to plate morph evolution of the three-spined stickleback (Gasterosteus aculeatus) is well described, the environmental variables that select for different plate and spine morphs are incompletely understood. Using replicate populations of three-spined sticklebacks on North Uist, Scotland, we previously investigated the role of predation pressure and calcium limitation on ...
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تاریخ انتشار 2007