Results 131 to 140 of about 18,336,744 (298)

Genomic Diversity of the Endangered Guinan Toad‐Headed Lizard and Its Conservation Implications

Integrative Zoology, EarlyView.
We produced HiFi long reads and assembled a high‐quality genome for the Guinan toad‐headed lizard—Phrynocephalus guinanensis—and present a comprehensive conservation genomics assessment. Our findings clearly show population structure, a reduced genetic diversity pattern, and a strong bottleneck in demographic history, reaffirming the endangered status ...
Ying Chen, Song Tan, Yiru Wang, Xia Qiu, Da Kang, Weizhao Yang   +5 more
wiley   +1 more source

A Lightweight Deep Neural Network for Individual Leopard Identification: Supporting Movement Ecology in the Taihang Mountains of Henan

Integrative Zoology, EarlyView.
We developed LeoNet, a lightweight deep learning model for leopard individual identification. It achieved 97.42% accuracy and was robust to age‐related pattern changes and unfamiliar individuals. Applied to camera‐trap data from the Taihang Mountains, LeoNet identified 41 wild North China leopards and generated individual‐level records to support ...
Jing He, Guoqing Shangguan, Yu Li, Fuming Ma, Zhishu Xiao, Mingliang Fan, Zhuo Chen, Junzhan Ren, Yingfeng Ren, Yunlong Wang, Tianping Wang, Hua Yang, Hualei Shen, Xiaohong Chen   +13 more
wiley   +1 more source

Genotyping Contemporary Captive and Historical Wild Western Lowland Gorillas Indicates Captive Breeding Is Maintaining Genetic Diversity in a Critically Endangered Primate

Animal Conservation, EarlyView.
Captive populations of threatened species risk losing genetic diversity over time. We evaluated the genetic status of contemporary captive western lowland gorillas (Gorilla gorilla gorilla) at Howletts and Port Lympne and compared this with specimens from a historical wild population.
Jaimie Morris, Tony King, John Hills, Simon C. Harvey, Jane Hopper, Rodrigo Vega   +5 more
wiley   +1 more source

Genomic Assessment of Reintroduced African Wild Dogs Informs Conservation Translocations

Animal Conservation, EarlyView.
Few reintroduction and translocation programs incorporate genomic assessments into management planning, despite ongoing debate over how founder individuals should be selected. Here, we assess the genomic composition of reintroduced African wild dog (Lycaon pictus) populations in private reserves in South Africa, comparing them with a free‐roaming ...
Michou Weimar, Cole du Plessis, Rosemary Groom, Bettine Jansen van Vuuren, Laura Tensen   +4 more
wiley   +1 more source

Maximizing Genetic Response in Breeding Schemes of Dairy Cattle with Constraints on Variance of Response [PDF]

, 1994
Predicted genetic progress in dairy cattle breeding schemes was maximized with the variances of selection responses constrained, i.e., restricted effective population sizes. This restriction would also lead to schemes with acceptable rates of inbreeding (
Woolliams, John, Meuwissen, T.H.E.
core  

Tipping the Scales Using Cryopreservation: Modelling the Genetic Value and Management Potential of Integrated Cryopreservation for Threatened Ex‐Situ Pupfish Populations

Animal Conservation, EarlyView.
This graphical abstract depicts the number of additional fish that would be required to achieve 90% genetic diversity for endangered pupfish species housed in EAZA collections, with or without the use of cryopreserved material. ABSTRACT Zoos and aquaria must retain genetic diversity for the species they house if the populations are to remain viable ...
James Edward Brereton, Susan L. Walker, Andrew Mooney, Pedro Machado, Elmar Fienieg, Elena Hunter   +5 more
wiley   +1 more source

Parentage Analysis in a Green Sea Turtle (Chelonia mydas) Population From French Polynesia Reveals a Tendency for Inbreeding and Unexpected Plasticity in Reproductive Behaviour

Ecology and Evolution
The reproductive systems of natural populations can significantly impact their genetic diversity by either preventing or promoting inbreeding. Therefore, it is crucial to have a comprehensive understanding of the mating system to evaluate a population's ...
Violaine Dolfo, Cécile Gaspar, Miri Tatarata, Emilie Boissin, Serge Planes   +4 more
doaj   +1 more source

Loss‐of‐Function Variants in CCDC189 Cause Human Oligoasthenoteratozoospermia by Disrupting Sperm Flagellar and Acrosomal Architecture

Andrology, EarlyView.
ABSTRACT Background Oligoasthenoteratozoospermia (OAT), characterized by reduced sperm count, impaired motility, and abnormal morphology, is a major cause of male infertility with substantial genetic heterogeneity. However, the underlying genetic etiology remains unresolved in a large proportion of affected individuals.
Jianteng Zhou, Ghulam Mustafa, Tingting Lin, Jingwei Ye, Huan Zhang, Hanwei Jiang, Kexin Yang, Guoning Huang, Qinghua Shi   +8 more
wiley   +1 more source

Reproductive Performance, Inbreeding, and Genetic Diversity in Montbeliarde Dairy Cattle Obtained by Absorption Crossing

Animals
Montbeliarde dairy cattle were introduced in Ecuador with the aim of ameliorating the production performance of other cattle breeds. The aim was to analyze the reproductive performance, demographic structure, inbreeding, and genetic diversity of ...
Luis F. Cartuche-Macas, Oscar J. Guaman Ilvay, Edilberto Chacón, Miguel A. Gutierrez-Reinoso, Manuel Garcia-Herreros   +4 more
doaj   +1 more source

Advancing conservation breeding programs for marine invertebrates

Conservation Biology, EarlyView.
Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam, Bart Shepherd, Kylie Lev, Rebecca Albright   +3 more
wiley   +1 more source