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When it comes to choosing a mate, female guppies often go for mates with the flashiest, most interesting color patterns.In a new study, Florida State University researchers found that the choices of t...
In Sex-Changing Fish,Male-Typical Sexual Behavior Associated With Elevated Expression Of Male Sex Hormone Receptors In Muscles
Sex-Changing Fish Male-Typical Sexual Behavior Male Sex Hormone Receptors Muscles
2017/7/21
Sex-changing fish exhibit differences in androgen receptor (AR) expression in muscles that are highly sensitive to androgens (male sex hormones) and essential for male courtship behavior, according to...
New Study:Male Chimpanzees Can Be Players And Good Fathers
Male Chimpanzees Players Good Fathers
2016/11/29
New research suggests that male chimpanzees are more invested in protecting their own offspring than previously thought. Researchers found male chimpanzees spend time with non-mating female chimpanzee...
In battle of the sexes,a single night with a New York male is enough to kill
battle of the sexes New York male enough to kill
2015/6/18
Men and women often enter relationships with different long-term goals. In the animal world, differences in approaches to reproductive success can lead to sexual conflict.Male fruit flies, for example...
Lemur girls behave more like the guys, thanks to a little testosterone, according to a new study.Males rule in most of the animal world. But when it comes to conventional gender roles, lemurs -- dista...
While the female baboon’s big red bottom may be an eyesore to some, it has an aphrodisiac effect on her mates. Biologists have long thought that baboon males prefer females with bigger backsides as th...
Vocal Performance in Songbirds: Territorial Defense and the Development of Male Song and Female Mating Preferences
birdsong developmental stress female preferences sexual selection swamp sparrow vocal performance
2014/12/18
The evolution of sexually selected signals has been a major topic of scientific research since Darwin. In recent years, scientists have focused on how elaborate signals can indicate honest information...
Built-in billboards: Male bluefin killifish signal different things with different fins（图）
different fins Built-in billboard
2014/12/1
CHAMPAIGN, Ill. — They help fish swim, but fins also advertise a fish’s social standing and health. In a new study, researchers report that for the male bluefin killifish (Lucania goodei), each colorf...
Effect of Age and Caponization on Blood Parameters and Bone Development of Male Native Chickens in Taiwan
Age Bone Development Caponization Male Chicken Testosterone
2016/5/10
An experiment was carried out to determine the effect of age and caponization on the development blood and bone characteristics development in male country chickens in Taiwan. A total of two hundred 8...
The Roles of Estrogens in the Efferent Ductules of the Male Reproductive System : A Review
Estrogens Efferent Ductules Estrogen Receptors Male Fertility Environmental Endocrine Disruptor
2016/5/5
Male reproduction is influenced by a number of intrinsic and extrinsic factors, including environmental endocrine disruptors. Testosterone is a well recognized intrinsic regulator for development and ...
Sterility Effect of the Commercial Neem Extract NeemAzal-T/S® (Azadirachta indica A. Jus.) on Male Rats (Rattus norvegicus)
Neem extract sterility histopathology hematology testosterone rodent pests
2010/3/25
Numerous studies with experimental animals have shown that neem seed extracts have transient and reversible effects on sterility. NeemAzal-T/S® (1%) was fed to 3 experimental animal groups via sto...
The Optimum Dietary Essential Amino Acid Pattern for Male Taiwan Country Chicks
Taiwan Country Chicks Essential Amino Acids Body Nitrogen Accretion Optimum Patterns
2016/4/29
The objective of this study was to estimate the optimum dietary essential amino acid pattern for male Taiwan country chicks. A series of experiments was conducted with chicks, 14 d of age, for 2 wks. ...
Effects of Castration on Androgen Receptor, IGF-I Ea, MGF and Myostatin Gene Expression in Skeletal Muscles of Male Pigs
Pig Castration Skeletal Muscle Molecular Cloning Gene Expression
2016/4/29
Castration of male pig produces significant negative effects on skeletal muscle development. The androgen receptor (AR), two splice variants of insulin-like growth factor-I (IGF-I Ea and MGF) and the ...
The Effects of Caponization Age on Muscle Characteristics in Male Chicken
Caponization Male Chicken Muscle Quality Muscle Quantity
2016/4/26
This study examined the caponization effects on the muscle characteristics (quality and quantity) of caponized male chickens fed before or after sexual maturity. Healthy and uniform Single Comb White ...
Immune Response and Plasma Alpha Tocopherol and Selenium Status of Male Buffalo (Bubalus bubalis) Calves Supplemented with Vitamin E and Selenium
Vitamin E Selenium Immune Response Buffalo Calves
2016/4/26
An experiment was conducted using 20 male buffalo calves to study the effect of vitamin E and selenium supplementation on their immune response and plasma ??tocopherol and selenium status. These buffa...