Results 1 to 10 of about 50,849 (296)

Sexual maturity and sexual dimorphism in a population of the rocket-frog Colostethus aff. fraterdanieli (Anura: Dendrobatidae) on the northeastern Cordillera Central of Colombia

Actualidades Biológicas, 2015
The minimum size of sexual maturity and sexual dimorphism are important life history traits useful to study and understand the population dynamics of any species.
Yeison Tolosa, Claudia Molina-Zuluaga, Adriana Restrepo, Juan M Daza   +3 more
doaj   +1 more source

Relative growth, sexual maturity and handedness in the ghost shrimp Callichirus major (Decapoda: Callianassidae) from the southwestern Atlantic

Scientia Marina, 2019
Biometric studies provide valuable information about changes associated with the growth and sexual maturity of living organisms. We analysed sexual dimorphism, allometric growth, sexual maturity and handedness in the ghost shrimp Callichirus major at ...
Juliana Priscila Piva Rio, Patricio Hernáez, Marcelo Antonio Amaro Pinheiro   +2 more
doaj   +1 more source

Ontogenetic shape changes and sexual dimorphism in Aegla marginata Bond-Buckup and Buckup, 1994

Anais da Academia Brasileira de Ciências, 2018
A study on relative growth, sexual dimorphism and ontogenetic trajectory was carried out in a population of the aeglidAegla marginata coming from Barrinha River, Iguape River Basin, Tunas do Paraná, Paraná State, Brazil.
CAROLINA L. ADAM, MURILO Z. MAROCHI, SETUKO MASUNARI   +2 more
doaj   +1 more source

GENETIC STUDY OF EGG LAYING PERFORMANCE IN FOUR LOCALLY DEVELOPED STRAINS OF CHICKENS [PDF]

Journal of Animal and Poultry Production, 2000
A total number of 364 pedigreed pullets at sexual maturity was used randomly which contained 90 Mandarah (MN), 84 Golden Montazah  (GM), 96 Silver Montazah (SM) and 94 Matrouh (MT) to study the genetic parameters of egg laying performance in four ...
A. El-Labban,
doaj   +1 more source

Relationship between three methods for the evaluation of skeletal maturation with sexual maturation

Revista Facultad de Odontología Universidad de Antioquia, 2006
The objective of this study was to determine which of the methods used to establish the skeletal maturation is better related with the maturity of the patient, and for that reason is more practical and applicable to the clinical practice.
Óscar Zapata, Diana Barbosa , Mónica Giraldo , Julia Andrea Gómez   +3 more
doaj  

Biometrie sexual and ontogenetic dimorphism on the marine catfish Genidens genidens (Siluriformes, Ariidae) in a tropical estuary

Latin American Journal of Aquatic Research, 2015
This paper aims to study the ontogenetic sexual dimorphism of Genidens genidens in Guanabara Bay, southeastern coast of Brazil. Altogether 378 specimens were anayzed (233 females and 145 males) with total length ranging from 13.3 to 43.5 cm.
Larissa G Paiva, Luana Prestrelo, Kiani M Sant' Anna, Marcelo Vianna   +3 more
doaj   +1 more source

Characterizing the Norway Lobster Nephrops norvegicus (L., Homarida: Decapoda) Maturity of Males in the Mediterranean Sea: Morphological and Physiological Aspects

Animals
In male decapods, such as the Norway lobster Nephrops norvegicus, sexual maturity is not easily determined by macroscopic examination of gonads and few studies have been conducted on this topic.
Cristina Porcu, Noemi Pascale, Andrea Bellodi, Pierluigi Carbonara, Alessandro Cau, Riccardo Demurtas, Antonello Mulas, Maria Cristina Follesa   +7 more
doaj   +1 more source

Comparing sex hormones levels in Acipenser persicus at the onset of Autumnal migration

‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2006
Levels of two main steroid hormones in gonads, 17-B Stradiol (E2) and testosterone (T) were compared in males and females of Persian sturgeon at the start of autumnal migration to spawning rivers.
R. Malazadeh; A. Halajian; R. Kazemi; M. Bahmani; A. Hoshmand
doaj  

Canonical correlation analysis for studying the relationship between egg production traits and body weight, egg weight and age at sexual maturity in layers

Czech Journal of Animal Science, 2005
In this study, canonical correlation analysis was applied to layer data to estimate the relationships of egg production with age at sexual maturity, body weight and egg weight.
Y. Akbaş, Ç. Takma
doaj   +1 more source

Transcriptome Sequencing and Differential Analysis of Testes of 1-Year-Old and 3-Year-Old Kazakh Horses

Biology
The Kazakh horse is an outstanding dual-purpose dairy and meat breed in China, characterized by early maturity, tolerance to coarse feed, and strong stress resistance.
Jiahao Liu, Yuting Yang, Liuxiang Wen, Mingyue Wen, Yaqi Zeng, Wanlu Ren, Xinkui Yao   +6 more
doaj   +1 more source