Results 271 to 280 of about 1,464,639 (343)
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Ontogenetic colour change signals sexual maturity in a non‐territorial damselfly
Ethology, 2019Conspicuous colouration increases male reproductive success through female preferences and/or male–male competition. Despite the advantages of conspicuous colouration, inconspicuous male morphs can exist simultaneously in a population due to genetic ...
Md Kawsar Khan, M. Herberstein
semanticscholar +1 more source
The Journal of comparative neurology, 2018
Maximal longevity of endotherms has long been considered to increase with decreasing specific metabolic rate, and thus with increasing body mass. Using a dataset of over 700 species, here I show that maximal longevity, age at sexual maturity, and ...
S. Herculano‐Houzel
semanticscholar +1 more source
Maximal longevity of endotherms has long been considered to increase with decreasing specific metabolic rate, and thus with increasing body mass. Using a dataset of over 700 species, here I show that maximal longevity, age at sexual maturity, and ...
S. Herculano‐Houzel
semanticscholar +1 more source
Ovogenesis during sexual maturity
American Journal of Anatomy, 1923E. Allen
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Nature, 1959
D. J. MERRELL1 says in regard to the fertility of matings of Drosophila when employing males less than 24 hr. old and males aged for seven days: “The imaged flies were left together in the creamers for periods ranging from 18 to 72 hours; the aged flies were separated after 2 to 7 hours, the variation in time being due to differences in the length of ...
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D. J. MERRELL1 says in regard to the fertility of matings of Drosophila when employing males less than 24 hr. old and males aged for seven days: “The imaged flies were left together in the creamers for periods ranging from 18 to 72 hours; the aged flies were separated after 2 to 7 hours, the variation in time being due to differences in the length of ...
openaire +2 more sources
Sexual Maturation in Thai Boys
Journal of Pediatric Endocrinology and Metabolism, 2010A worldwide secular trend towards earlier onset of puberty in girls has been noted during recent years. However, the data on sexual maturation of boys are relatively scarce and normative data of sexual maturation in Thai boys are still lacking.To determine the age of secondary sexual maturation in normal Thai boys.Three hundred healthy urban boys aged ...
P, Mahachoklertwattana +5 more
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Reproduction in Domestic Animals, 2008
ContentsIn this review, we describe the process of sexual maturation in the bull calf. The testes of the bull grow relatively slowly until approximately 25 weeks of age and then a rapid phase of growth occurs until puberty, at 37–50 weeks of age. During the early postnatal phase of slower growth of the testis pre‐spermatogonia and some spermatogonia ...
N, Rawlings +3 more
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ContentsIn this review, we describe the process of sexual maturation in the bull calf. The testes of the bull grow relatively slowly until approximately 25 weeks of age and then a rapid phase of growth occurs until puberty, at 37–50 weeks of age. During the early postnatal phase of slower growth of the testis pre‐spermatogonia and some spermatogonia ...
N, Rawlings +3 more
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Understanding premature sexual maturation
Paediatrics and Child Health, 2011Abstract Premature sexual maturation is a general term encompassing precocious puberty as well as several normal variants in both boys and girls. It is important to be able to determine the specific cause in order to formulate an appropriate plan of management.
Fiona J. Ryan +2 more
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, 2012
Summary This study describes the size at first sexual maturity, length–weight relationships (LWR) in relation to size at first sexual maturity, and Fulton’s condition factor (KF) of Eutropiichthys vacha in the Ganges River, northwestern Bangladesh ...
M. Hossain +6 more
semanticscholar +1 more source
Summary This study describes the size at first sexual maturity, length–weight relationships (LWR) in relation to size at first sexual maturity, and Fulton’s condition factor (KF) of Eutropiichthys vacha in the Ganges River, northwestern Bangladesh ...
M. Hossain +6 more
semanticscholar +1 more source
2011
Abstract Premature sexual maturation is a frequent cause for referral in paediatric endocrinology. Although clinical evaluation will suffice to reassure the patient and family in a majority of cases, premature sexual maturation can reveal severe conditions and need a thorough evaluation to identify its cause and potential for progression,
Jean-Claude Carel, Juliane Léger
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Abstract Premature sexual maturation is a frequent cause for referral in paediatric endocrinology. Although clinical evaluation will suffice to reassure the patient and family in a majority of cases, premature sexual maturation can reveal severe conditions and need a thorough evaluation to identify its cause and potential for progression,
Jean-Claude Carel, Juliane Léger
openaire +1 more source