Abstract：
:Mongolian gerbils are territorial rodents of steppes and semideserts of Mongolia and Northern China. At least under laboratory conditions, the family life is characterized by long-term harmonious and short-term aggressive periods in which some members are expelled. The purpose of this study was to clarify which features of male offspring promote their expulsion. Therefore body mass, absolute and relative weight of testes and epididymis, histology of testes and testosterone concentrations were analyzed in males derived from five families living in semi-natural enclosures with food and water ad libitum. Males expelled (EFM, n=40) had significantly higher relative testes and relative epididymis weight and higher testosterone concentrations in harmonious periods than it did non-attacked ones (IFM, n=13). A stepwise discriminant analysis has established the relative testes weight as decisive for the affiliation to EFM or IFM. Based on this parameter, 71.7% of the offspring could be classified correctly. Moreover, histological results showed that 50.0% of integrated and 29.4% of the expelled family members had incomplete spermiogenesis, indicating a reduced fertility. It is concluded, that males do compete for reproduction within the families which triggers the expulsion of the males with the highest reproductive capacity.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Scheibler E,Weinandy R,Gattermann Rdoi
10.1016/j.physbeh.2005.08.037subject
Has Abstractpub_date
2006-01-30 00:00:00pages
24-30issue
1eissn
0031-9384issn
1873-507Xpii
S0031-9384(05)00356-2journal_volume
87pub_type
杂志文章abstract：:Medial prefrontal cortex (mPFC), a forebrain structure, is involved in many brain functions such as learning and memory. In the present study, the effect of intra-mPFC microinjection of oxytocin, atosiban, morphine and naloxone was investigated on memory processing. Two guide cannulas were implanted into the right and...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2019.112599
更新日期：2019-10-01 00:00:00
abstract：:The variation of food intake and digestive tract contents over a period of 24 hours was measured in the free feeding rat kept under a 12:12 hr light:dark cycle (lights on at 0700 hr). After a cessation between 0700 and 1000 hr, the rate of food intake increased progressively during daytime followed by a marked increas...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(87)90164-8
更新日期：1987-01-01 00:00:00
abstract：:Recent research suggests that gratitude is associated with better cardiovascular health. Here, we investigated whether trait and/or state gratitude was associated with cardiovascular responses to acute stress. Eighty-six young adults completed measures of gratitude and had their cardiovascular responses monitored thro...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2020.112896
更新日期：2020-07-01 00:00:00
abstract：:Angiotensins, especially angiotensin IV (Ang IV), have recently been found to be potent cognitive enhancers in rodents. However, the precise mechanisms of their memory improving effects remain unknown. In this study we tested the hypothesis that D2 dopamine receptors at least partially mediate cognitive effects of Ang...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2006.03.025
更新日期：2006-06-15 00:00:00
abstract：:The obesity epidemic is a major health and economic burden facing both developed and developing countries worldwide. Interrogation of the central and peripheral mechanisms regulating ingestive behaviors have primarily focused on food intake, and in the process uncovered a detailed neuroanatomical framework controlling...
journal_title：Physiology & behavior
pub_type： 杂志文章,评审
doi：10.1016/j.physbeh.2017.10.006
更新日期：2018-06-01 00:00:00
abstract：:Rats with medial frontal cortical lesions (MFC) and control animals with sham operations were tested on an ascending series of 8 DRL schedules of reinforcement ranging from 5 to 70 seconds. Rats with MFC lesions did not differ from the control group in performance when response rate, responses per reinforcement and ef...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(87)90405-7
更新日期：1987-01-01 00:00:00
abstract：:We tested the hypothesis whether daily food availability period would restore rhythmicity in individuals with disrupted circadian behavior with no effect on appetite regulation. Particularly, we investigated the effects of timed food availability on activity behavior, and Fos and neuropeptide Y expressions in Indian w...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2016.04.017
更新日期：2016-07-01 00:00:00
abstract：:This study was designed to determine the differences between young and elderly people on the perceived intensity and pleasantness of sucrose in foods, in relation to their food intake. First, a group of 35 young subjects (mean age: 22 +/- 2 years) and 29 elderly subjects (mean age: 79 +/- 6 years) judged the intensity...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(96)00306-x
更新日期：1996-12-01 00:00:00
abstract：:Much of the inter-individual variation observed in animal behaviour is now attributed to the existence of behavioural phenotypes or animal personalities. Such phenotypes may be fundamental to fisheries and aquaculture, yet there have been few detailed studies of this phenomenon in exploited marine animals. We investig...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2012.03.010
更新日期：2012-06-25 00:00:00
abstract：:Many small mammals display daily torpor to minimize energy expenditure during the rest phase when faced with unfavorable environmental conditions. However, given a choice of thermal environments, it is not clear whether these daily heterotherms select ambient temperatures that minimize metabolic rates during torpor or...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(98)00136-x
更新日期：1998-07-01 00:00:00
abstract：:Twenty-one healthy volunteers took part in the study, the aim of which was to determine the influence of acute pain on skin impedance, skin temperature and heart rate. Acute pain was induced by cold exposure. Skin impedance, heart rate and facial skin temperature were recorded before, during and after the painful stim...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(90)90064-b
更新日期：1990-01-01 00:00:00
abstract：:The aim of the study was to examine the Spielberger's hypothesis, according to which changes in state-anxiety level would correspond exactly to adverse changes in mood states. We analyzed the correlation coefficients between state-anxiety and low moods, and further investigated whether these correlation coefficients i...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(01)00575-3
更新日期：2001-11-01 00:00:00
abstract：:Sedentary, adult rats of both sexes fed Purina chow and a 32% sucrose solution overate, gained excess weight and had higher Lee Indexes of obesity than control animals fed only Purina chow. The magnitude of these effects was similar in the males and females. Animals of both sexes fed the sucrose diet showed a slower r...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(82)90012-9
更新日期：1982-08-01 00:00:00
abstract：:Early Pb exposure is known to disrupt the development of the hippocampus and result in deficits in learning and memory capacities and altered seizure susceptibility. The excitatory amino acid, NMDA, is found in high concentrations in the hippocampus and has been implicated in learning and memory functions and seizure ...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(92)90398-l
更新日期：1992-10-01 00:00:00
abstract：:The aim of the present study with rats was to show that electrical stimulation of a monosynaptic pathway, whose high plastic potency is well-known, can serve as a conditioned stimulus (CS) in a learning paradigm. Using chronic rats, stimulation of the perforant pathway, which activates the entorhinal cortex input to t...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(82)90291-8
更新日期：1982-12-01 00:00:00
abstract：:Non-parturient female rats were primed with oestrogen and given 5 minutes of vaginal-cervical stimulation before foster pups were introduced to them. Virgin and multiparous Wistar rats were used and half the females were ovariectomised. Half of each group was given vaginal-cervical stimulation and the other half was h...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(86)90378-1
更新日期：1986-01-01 00:00:00
abstract：:In these experiments we determined whether stress influenced intake of different flavored test solutions or only those that were preferred. In a series of studies, rats or hamsters were exposed to acute (1 h) or repeated (3 h/day for 3 days) restraint stress immediately followed by access to one of four tastants (sacc...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(98)00223-6
更新日期：1999-01-01 00:00:00
abstract：:Psychological stress is an important perpetuating, worsening and risk factor for temporomandibular disorders of muscular or articular origin. Occlusion instability, by the way, is considered a risk factor of this pathology and can be reproduced in some experimental animal models. The exact physiologic mechanism underl...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2017.12.026
更新日期：2018-03-01 00:00:00
abstract：:There is surprisingly little research examining the effect of cocaine on motor learning. Given that changes in motor activity can confound behavioral assays of learning and memory a direct assessment of cocaine on motor learning seems warranted. The present study was conducted to examine the effect of cocaine on motor...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2013.05.027
更新日期：2013-06-13 00:00:00
abstract：:The effects of loratadine, a peripherally acting histamine (H1) antagonist, and methysergide, a serotonin (5-HT) antagonist, were evaluated in seven normal-weight, male research volunteers, participating in a placebo-controlled, double-blind, 17-day residential study. Participants received oral loratadine (10 or 20 mg...
journal_title：Physiology & behavior
pub_type： 临床试验,杂志文章
doi：10.1016/s0031-9384(98)00046-8
更新日期：1998-05-01 00:00:00
abstract：:Rats exposed to a relatively high dose (7.5 g/kg body weight) of alcohol on either the fifth or tenth postnatal day of age have been reported to have long-lasting deficits in spatial learning ability as tested on the Morris water maze task. The question arises concerning the level of alcohol required to achieve this e...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(97)00424-1
更新日期：1998-01-01 00:00:00
abstract：:Disruption of attachment relations in early life is linked to greater vulnerability to depressive illness at later ages. Evidence suggests this process involves stress-induced activation of central inflammatory factors, though the specific mediators and processes involved are not known. We used a guinea pig model in w...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2018.11.040
更新日期：2019-02-01 00:00:00
abstract：:Estrous synchrony was tested using 10 pairs of sibling female rats (Rattus norvegicus). A Monte Carlo bootstrap simulation was used to construct random control groups to avoid previous statistical errors and to test for significance when there are irregular cycles. The 10 pairs of females did not exhibit estrous synch...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(00)00395-4
更新日期：2001-01-01 00:00:00
abstract：:Diet is an environmental factor with significant potential to affect the brain and behavior in both positive and negative ways. Work in animals is necessary to understand this relationship and how it may apply to mental health in humans. One area which has been investigated extensively is whether diet, specifically a ...
journal_title：Physiology & behavior
pub_type： 杂志文章,评审
doi：10.1016/j.physbeh.2020.112965
更新日期：2020-09-01 00:00:00
abstract：:The psychophysiological response due to stress of soldiers in actual combat operations have been determined by recent researchers, but there is a lack of knowledge about the most effective training methodologies to prepare these population for these new psychophysiological and tactical requirements. The aim of this st...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2019.01.009
更新日期：2019-03-15 00:00:00
abstract：:To study some metabolic features during feeding in food-restricted rats two groups of animals were maintained on a 2 hr feeding/22 hr fast schedule. Group D (n = 38) received a meal every day from 8:00 to 10:00 a.m. Group N (n = 34) was given the meal from 8:00 to 10:00 p.m. The average total amount of food ingested b...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(85)90399-3
更新日期：1985-11-01 00:00:00
abstract：:Schizophrenia patients show a high rate of premature mortality due to suicide. The pathophysiological mechanisms of these suicidal behaviors in schizophrenia do not appear to involve serotonergic neurotransmission as found in the general population. Our aim was to develop an in vivo model of schizophrenia presenting s...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2016.01.002
更新日期：2016-03-15 00:00:00
abstract：:Animals sampled from the third generation (S3) of selective breeding of N:NIH strain rats based on ultrasonic vocalization (USV) rates in infancy (High, Low, and Random lines) were tested as adults on the elevated plus maze, a well-validated test of anxiety. Results showed that the Low line spent a greater percent of ...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(95)02222-8
更新日期：1996-07-01 00:00:00
abstract：:is well established that, on the anterior tongue, thresholds for chemical tastants are inversely related to the number of fungiform papillae. However, it is not known whether this is the case for thresholds to electrical currents presented to the lingual surface. In this study, electrical thresholds for 16 subjects we...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(02)00672-8
更新日期：2002-04-15 00:00:00
abstract：:Visual information processing was investigated in the inferotemporal cortical (ITCx)-amygdalar (AM)-lateral hypothalamic (LHA) axis which contributes to food-nonfood discrimination. Neuronal activity was recorded from monkey AM and LHA during discrimination of sensory stimuli including sight of food or nonfood. The ta...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(89)90149-2
更新日期：1989-02-01 00:00:00
