Results 61 to 70 of about 2,569 (174)

Adaptive strategy in control of ectoparasitic infection in Eurasian tree sparrow

Journal of Basic and Applied Zoology, 2022
Background Selection pressure due to parasitic infestation puts adverse effects on birds’ fitness concerning survival and reproductive success. The present study was conducted on Eurasian tree sparrow at Shillong (25°34′ N, 91°53′ E), India, for a year ...
Namram Sushindrajit Singh, Anand Shanker Dixit, Debashish Khanikar   +2 more
doaj   +1 more source

Year‐round spawning increases throughput of genetic modification of common carp (Cyprinus carpio)

Journal of the World Aquaculture Society, Volume 57, Issue 4, August 2026.
Abstract The common carp (Cyprinus carpio) is an economically and ecologically significant species. It is both one of the most highly produced fish in aquaculture globally and a persistent, widespread invasive species. Research efforts focused on understanding its biology, improving traits for aquaculture, and generating next‐generation carp control ...
Julie Badger, Nicholas K. Jacob, Colby Johnson, Leland Feist, Samuel E. Erickson, Isabel Ameli, Dimitri Perusse, Alex W. Bajcz, Kieran Smith, Kaitlin Machina, Siba R. Das, Przemyslaw G. Bajer, Michael J. Smanski   +12 more
wiley   +1 more source

Longitudinal Variation in Population Structure, Growth, and Reproductive Characteristics of Squalidus argentatus, Driven by Cascade Dams in the Largest Tributary of Dongting Lake

Ecology and Evolution, Volume 16, Issue 7, July 2026.
The Dongting Lake and the Xiangjiang River. ABSTRACT Cascade dams would affect directly and indirectly life history traits of fish through altering flow regime and habitats. Growth patterns and reproductive strategy of Squalidus argentatus were studied at the Yongzhou above cascade dams, Hengyang heavily regulated by cascade dams, Zhuzhou influenced by
Yanfei Huang, Yiyang Gao, Yang Zhengfei, Dongzhi Liu, LiLi Xie, Deliang Li   +5 more
wiley   +1 more source

Gonadosomatic Index and Testis Morphology of Common Carp (Cyprinus carpio) in Rivers Contaminated with Estrogenic Chemicals.

Journal of Veterinary Medical Science, 2002
To study the effect of estrogenic chemicals on fish, the gonadosomatic index (GSI = [testis weight/body weight] x 100) and testis histology of mature common carp (Cyprinus carpio) from 2 contaminated sites (Ishizu and Wada rivers, Osaka) and a control site were examined between June 1998 and March 2001. The concentration of nonylphenol, bisphenol A and
HASSANIN, Amin, KUWAHARA, Sachi, NURHIDAYAT, TSUKAMOTO, Yasuhiro, OGAWA, Kazushige, HIRAMATSU, Kazuya, SASAKI, Fumihiko   +6 more
openaire   +3 more sources

Tracking the Pulse of the Dunes: Seasonal Metabolic Responses of Liolaemus arambarensis to Climatic Variability

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 6, Page 568-580, July 2026.
ABSTRACT Seasonal environmental fluctuations profoundly influence ectothermic vertebrates, regulating their physiology, metabolism, and life cycles. This study investigated the metabolic and morphometric seasonal dynamics of the subtropical sand lizard Liolaemus arambarensis, an endangered species endemic to the coastal dunes of southern Brazil.
Artur Antunes Navarro Valgas, Gustavo Kasper Cubas, Diogo Reis de Oliveira, Jessica Fonseca Araujo, Guendalina Turcato Oliveira, Laura Verrastro   +5 more
wiley   +1 more source

Vertical Habitat Use by Japanese Jack Mackerel Trachurus japonicus Inferred From a Biologging Study in Tokyo Bay

Fisheries Oceanography, Volume 35, Issue 4, Page 518-531, July 2026.
ABSTRACT The movement ecology of Trachurus japonicus in the adult stage remains poorly understood because observing their underwater behavior over long periods is challenging. This study aimed to examine vertical habitat use by T. japonicus using electronic tags. Ninety fish were tagged and released in November 2022 in Tokyo Bay, Japan.
Junji Kinoshita, Yuki Fujinami, Junichi Imoto, Tohya Yasuda   +3 more
wiley   +1 more source

Effects of Hydro-Alcoholic Extract of Withania Coagulans on Antioxidant Status and Sperm Parameters Following Testosterone Administration in Rat

Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Īlām, 2018
Introduction: Enhancement of testosterone levels or its improper and arbitrary usage can disrupt fertility. Today, application of medicinal herbs is considered to treat hormonal disorders and infertility.
Maryam Sarbishegi, Ozra Khajavi
doaj  

Reproductive plasticity and environmental tolerance of invasive African catfish (Clarias gariepinus) in a tropical Brazilian river

Journal of Fish Biology, Volume 109, Issue 1, Page 264-277, July 2026.
Abstract Invasive alien species (IAS) pose a significant threat to biodiversity, particularly when endowed with high ecological and reproductive plasticity. The African catfish, Clarias gariepinus, is one such species, widely recognized for its ability to colonize and establish in diverse tropical ecosystems.
Michelle Torres Dumith, Alejandra Filippo Gonzalez Neves dos Santos   +1 more
wiley   +1 more source

Evaluation of laserpuncture on testicular maturation and semen quality of the catfish Sorubim cuspicaudus

Aquaculture Reports
Sorubim cuspicaudus is a native catfish species with potential for aquaculture diversification in Colombia. However, captive reproduction is constrained by asynchronous gonadal maturation and low male semen volume.
Carlos Tapia Pacheco, José Espinosa Araujo, Víctor Atencio García   +2 more
doaj   +1 more source

The Relationship of Gonadosomatic Index and Hepatosomatic Index in Two Different Age Groups of Common Carp [PDF]

International Journal of Current Microbiology and Applied Sciences, 2020
Lovedeep Sharma, R. N. Ram
openaire   +1 more source