نتایج جستجو برای: Pups
تعداد نتایج: 5674 فیلتر نتایج به سال:
Wolves are important to keep ecosystems healthy. For wolf populations thrive, pups need survive into adulthood. Wolf can be harmed, even killed, by wolves from outside their pack. To protect the pups, some in pack must stay at den and guard pups. But of adults leave sometimes, hunt for food other out pack’s territory. By monitoring studying many years across North America Alaska’s national park...
Introduction: Maternal separation (MS) can lead to learning and memory deficits, and also the risk of addiction. On the other hand, physical activities may lead to long-term changes in the mesolimbic dopamine pathway and the hippocampus. This study was designed to examine the effect of swimming exercise on the spatial learning and memory and voluntary morphine consumption in maternally separate...
objective(s): the effect of litter size and suckling intensity on the expression of kiss-1 mrna in the arcuate nucleus (arc) of rats were evaluated. materials and methods: thirty two pregnant and four non-lactating ovariectomized (as control group) rats were used in this experiment. lactating rats were allotted to eight equal groups. in three groups, litter size was adjusted to 5, 10, or 15 pup...
Objective(s): The effect of litter size and suckling intensity on the expression of KiSS-1 mRNA in the arcuate nucleus (ARC) of rats were evaluated. Materials and Methods: Thirty two pregnant and four non-lactating ovariectomized (as control group) rats were used in this experiment. Lactating rats were allotted to eight equal groups. In three groups, litter size was adjusted to 5, 10, or 15 pup...
Background RFamide-related peptide-3 (RFRP-3) inhibits gonadotropin releasing hormone (GnRH) and luteinizing hormone (LH) secretion in rats. This study evaluates the effects of litter size and suckling intensity on RFRP mRNA expression in the dorsomedial hypothalamic nucleus (DMH) of rats. MaterialsAndMethods A total of 32 pregnant and 4 non-lactating ovariectomized (control group) Sprague-Dawl...
The population of harbor seals (Phoca vitulina vitulina) along the coast Maine, U.S.A., has experienced rapid growth in abundance following passage Marine Mammal Protection Act 1972 but current information on trends is lacking. In this study, we apply a Bayesian hierarchical model to aerial survey data nonpups and pups. Prior 2001, estimates rates from 8-year moving averages reached high 2.1% 9...
background: rfamide-related peptide-3 (rfrp-3) inhibits gonadotropin releasing hormone (gnrh) and luteinizing hormone (lh) secretion in rats. this study evaluates the effects of litter size and suckling intensity on rfrp mrna expression in the dorsomedial hypothalamic nucleus (dmh) of rats. materials and methods: a total of 32 pregnant and 4 non-lactating ovariectomized (control group) sprague-...
Background: Silver nanoparticles lie within the most commercialized nanoparticles due to their strong antimicrobial properties. Animal studies have recently indicated that silver nanoparticles can be transfered from mothers to their pups via the maternal milk. However, there seems to be scant information in regard with the toxicity of these nanoparticles on various organs within sensitive devel...
Field observations suggest that time spent in the water by Weddell seal pups during lactation varies among individuals, which could yield important developmental tradeoffs. We analyzed data from 713 born to 419 different mothers over 9 years evaluate total water, age at first entry, and potential sources of variation using temperature loggers attached rear flipper pups. Pups entered 11–29 days ...
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