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Consistent Negative Correlations between Parasite Infection and Host Body Condition Across Seasons Suggest Potential Harmful Impacts of Salmincola markewitschi on Wild White-Spotted Charr, Salvelinus leucomaenis 
In this study, we investigated the potential impacts of mouth-attaching Salmincola markewitschi on white-spotted charr (Salvelinus leucomaenis) through intensive field surveys across four seasons using host body condition as an indicator of harmful effects. The prevalence and parasite abundance were highest in winter and gradually decreased in summer and autumn, which might be due to host breeding and/or wintering aggregations that help parasite transmissions. Despite seasonal differences in prevalence and parasite abundance, consistent negative correlations between parasite abundance and host body condition were observed ...
Source: Zoological Science - April 8, 2024 Category: Zoology Authors: Ryota Hasegawa Itsuro Koizumi Source Type: research

A New Species of the Blind Cave Loach Genus Protocobitis (Cypriniformes: Cobitidae), Protocobitis longicostatus sp. nov., from Guangxi, China
Zoolog Sci. 2024 Apr;41(2):210-215. doi: 10.2108/zs230104.ABSTRACTProtocobitis species are typical cave-dwelling fish, exhibiting distinctive morphological adaptations such as colorless body, lack of eyes, and reduced scales and ribs in response to their extreme cave habitats. Distinct from the recorded species, P. anteroventris, P. polylepis, and P. typhlops, a new species, Protocobitis longicostatus sp. nov., is described from Guangxi Zhuang Autonomous Region, China. Protocobitis longicostatus sp. nov. can easily be distinguished from all known congeners by the following characteristics: whole body covered by scales exce...
Source: Zoological Science - April 8, 2024 Category: Zoology Authors: Jia-Jun Zhou Zhi-Xian Qin Li-Na Du Hong-Ying Wu Source Type: research

Size dependent ingestion and effects of microplastics on survivability, hematology and intestinal histopathology of juvenile striped catfish (Pangasianodon hypophthalmus)
Chemosphere. 2024 Apr 5:141827. doi: 10.1016/j.chemosphere.2024.141827. Online ahead of print.ABSTRACTMicroplastic pollution is drastically increasing in aquatic ecosystems and it is assumed that different sizes of microplastics have diverse impacts on the physiology of aquatic organisms. Therefore, this study was intended to examine the ingestion and size specific effects of polyamide microplastic (PA-MP) on different physiological aspects such as growth, feed utilization, survivability, blood parameters and intestinal histopathology of juvenile striped catfish (Pangasianodon hypophthalmus). In a 28-day exposure, the fish...
Source: Chemosphere - April 7, 2024 Category: Chemistry Authors: Sheik Istiak Md Shahriar Naimul Islam Farhan Jamil Emon Mohammad Ashaf-Ud-Doulah Saleha Khan Md Shahjahan Source Type: research

Green manufacturing of a hypoxanthine enzyme sensor for fish freshness based on modified nitrocellulose surface with chito-oligosaccharide
Talanta. 2024 Mar 30;274:126007. doi: 10.1016/j.talanta.2024.126007. Online ahead of print.ABSTRACTHypoxanthine (Hx), produced by adenosine triphosphate (ATP) metabolism, is a valuable indicator that determines the quality and degradation status of meat products and is also an important biochemical marker to certain diseases such as gout. The rapid emergence of paper-based enzyme biosensors has already revolutionized its on-site determination. But it is still limited by the complex patterning and fabrication, unstable enzyme and uneven coloration. This work aims to develop an eco-friendly method to construct engineered pap...
Source: Talanta - April 7, 2024 Category: Chemistry Authors: Yilin Wang Xiaoyun Zhang Maole Wei Huigang Kang Zhenqiang Zhang Xiudan Wang Cuiping Ma Source Type: research