Results 61 to 70 of about 4,414 (189)

Local environment and sampling bias drive parasite prevalence estimates in freshwater fish communities

open access: yesOikos, Volume 2025, Issue 7, July 2025.
Parasite occurrence and infection estimates vary through time and space, making understanding the underlying drivers highly complex. Comparative studies based on empirical data must consider the factors of variation involved in estimating infection metrics in natural populations to make appropriate and reliable comparisons. Using a multi‐scale approach,
Juliane Vigneault   +2 more
wiley   +1 more source

Gyrodactylidae (Monogenea: Platyhelminthes) gill parasites of Tetragonopterinae (Characiformes: Characidae) from the upper Paraná River floodplain, Brazil

open access: yesActa Limnologica Brasiliensia, 2017
Aim: This study records Gyrodactylus neotropicalis and Anacanthocotyle anacanthocotyle in new hosts: Astyanax lacustris and Moenkhausia forestii, on the upper Paraná river floodplain. Besides, ecological aspects of the parasites distribution are explored.
Eloiza Muniz Capparros   +1 more
doaj   +1 more source

Connectivity and Population Structure in a Marginal Sea—A Review

open access: yesDiversity and Distributions, Volume 31, Issue 7, July 2025.
ABSTRACT Aim The current biodiversity crisis calls for conservation measures that limit or reduce the negative human impact on key habitats and vulnerable wild populations. To effectively protect biodiversity at all levels, including intra‐specific diversity, conservation measures should, ideally, be aligned with the connectivity and genetic structure ...
Simon Henriksson   +8 more
wiley   +1 more source

Dispersal and Gene Flow Among Potential Spawners: Source–Sink Structure Among Populations of Anadromous Brown Trout Exposed to Multifaceted Anthropogenic Impacts

open access: yesEvolutionary Applications, Volume 18, Issue 7, July 2025.
ABSTRACT Dispersal impacts individual fitness and influences local dynamics, stability and adaptation in interconnected populations. Anadromous salmonid fishes are renowned for their precise homing and adaptations to local aquatic environments, while navigating between multiple connected habitats.
K. L. Hawley   +5 more
wiley   +1 more source

Xác định mầm bệnh ký sinh trùng trên cá tra (Pangasianodon hypophthalmus) tự nhiên

open access: yesTạp chí Khoa học Đại học Cần Thơ, 2017
Đề tài khảo sát thành phần loài ký sinh trùng cá tra tự nhiên được thực hiện từ tháng 7 đến tháng 11 năm 2016. Tổng cộng có 86 mẫu cá tra giống thu từ sông Rạch Ngỗng ở Cần Thơ được quan sát dấu hiệu bệnh lý và soi tươi để kiểm tra ký sinh trùng. Kết
Nguyễn Thị Thu Hằng
doaj   +1 more source

Protozoários e metazoários parasitos do cardinal Paracheirodon axelrodi Schultz, 1956 (Characidae), peixe ornamental proveniente de exportador de Manaus, Estado do Amazonas, Brasil - DOI: 10.4025/actascibiolsci.v31i1.872

open access: yesActa Scientiarum: Biological Sciences, 2009
Os estudos sobre a parasitofauna de peixes ornamentais cultivados são de grande relevância para o conhecimento das espécies de parasitos, permitindo interferência em sua proliferação para evitar epizootias e, consequentemente, perdas econômicas na ...
Marcos Tavares Dias   +2 more
doaj   +1 more source

Non-lethal detection of mtDNA from the monogenean Gyrodactylus mutabilitas which recorded for the first time from the gill mucus of Cyprinus carpio, Iraq

open access: yesRevista de Ciências Agroveterinárias
The monogenean species of the genus Gyrodactylus are harmful to the common carp Cyprinus carpio. In this study fish sampling were collected from al-Tarmiyahm fish farm, Baghdad Iraq. The presence of the monogenean Gyrodactylus mutabilitas is reported in
Rana Shalal
doaj   +1 more source

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