Results 11 to 20 of about 286,307 (262)

Quantitative proteomic analysis of chicken serum reveals key proteins affecting follicle development during reproductive phase transitions

open access: yesPoultry Science, 2021
Avian reproductive behavior is regulated through the neuroendocrine system. The transition from laying to brooding is strictly controlled by the hypothalamus-pituitary-gonadal (HPG) axis. Cross talk on the HPG axis relies on the circulatory system, where
Xu Shen   +7 more
doaj   +1 more source

Seasonal changes in the reproductive cycle and condition index of the surf clam Mactra stultorum (Mollusca: Bivalvia) in the Gulf of Gabes, Tunisia

open access: yesOceanological and Hydrobiological Studies, 2023
The reproductive biology of Mactra stultorum from the Gulf of Gabes was investigated monthly during a one-year period (2017). This study is the first study examining its reproductive biology during one-year in the south of Tunisia.
Derbali Abdelkarim
doaj   +1 more source

Reproductive Biology, Sperm storage, and Sexual Maturity of Thamnodynastes strigatus (Serpentes: Dipsadidae) [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2022
Life history strategies determine and influence many aspects of species fitness. In this study, we describe the reproductive biology - reproductive cycle, sperm storage, and sexual maturity - of Thamnodynastes strigatus in South Brazil.
LUIZA LOEBENS   +3 more
doaj   +1 more source

Effect of humidity on the life cycle and reproduction of Dermacentor reticulatus (Ixodidae) in laboratory mice [PDF]

open access: yesZbornik Matice Srpske za Prirodne Nauke, 2003
The reproductive cycle of Dermacentor reticulatus (Ixodidae) is described in this paper. Experimental infestation was carried out on immobilized (fixed) RAP mice and those that could move freely. Dermacentor reticulatus (D.
Darabus Gh.   +4 more
doaj   +1 more source

Inflorescence Emergence and Flowering Response of Olive Cultivars Grown in Olive Reference Collection of Portugal (ORCP)

open access: yesPlants, 2023
In olive trees, fluctuations in the onset of phenological stages have been reported due to weather conditions. The present study analyses the reproductive phenology of 17 olive cultivars grown in Elvas (Portugal) in 3 consecutive years (2012–2014 ...
Carla Inês   +2 more
doaj   +1 more source

Long distance dispersal and oceanographic fronts shape the connectivity of the keystone sponge Phakellia ventilabrum in the deep northeast Atlantic

open access: yesFrontiers in Marine Science, 2023
Little is known about dispersal in deep-sea ecosystems, especially for sponges, which are abundant ecosystem engineers. Understanding patterns of gene flow in deep-sea sponges is essential, especially in areas where rising pressure from anthropogenic ...
Sergi Taboada   +30 more
doaj   +1 more source

Blood biochemical parameters of simmental cows in different phases of reproductive cycle [PDF]

open access: yesVeterinarski Glasnik, 2011
This paper presents the values of blood biochemical parameters of Simmental cows (n = 60), divided into five groups (dry cows, early puerperium, late puerperium, the fifth month of lactation, and cows with an extended service period). The ration
Radović Bisa   +3 more
doaj   +1 more source

Reproductive cycle of Geukensia demissa (Bivalvia: Mytilidae) on a beach at Nazaret, El Moján, Zulia State, Venezuela

open access: yesCiencias Marinas, 2005
The mytilid Geukensia demissa invaded Lake Maracaibo and since it is a new species at this location, little is known about its reproductive biology.
María Báez   +2 more
doaj   +1 more source

ON THE TECHNIQUE OF MODELING ONTOGENETIC CHANGES IN FISH AND INSECTS LIFECYCLE

open access: yesСистемный анализ и прикладная информатика, 2017
The article discusses the approach to modeling of metamorphoses in the development of a number of species in the context of their influence on the success of long-term trends of population dynamics.
A. Yu. Perevaryukha
doaj   +1 more source

Reproductive cycle of Loxechinus albus (Echinodermata: Echinoidea) in two areas of the Magellan Region (53ºS, 70-72ºW), Chile

open access: yesScientia Marina, 1999
The reproductive cycle of the Chilean edible sea urchin, Loxechinus albus, was studied in two areas of the Magellan region, the Cockburn Channel (53°43´S, 70°42´W) and Dawson Island (53°43´S, 72°00´W). Eleven monthly samplings were carried out from April
Sylvia T. Oyarzún   +3 more
doaj   +1 more source

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