Journal of fish biology

01 20 October 2026

DOI 10.1111/jfb.70688

Hatch date and early growth characteristics of different subspecies of Schizopygopsis younghusbandi Regan, 1905 in Xizang, China

Open DOI

Jiehong Liu, Jie Chen, Feng Huang et al.

Fish otolith microstructure is a fundamental aspect of fish ecology, providing insights into early‐life history traits such as daily age, growth rates and hatch dates. To investigate variations in hatch dates and early growth characteris...

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02 20 October 2026

DOI 10.1111/jfb.70707

Prolonged lake use in Atlantic salmon juveniles prior to seaward migration is associated with higher apparent mortality and faster estimated growth

Open DOI

Thomas E. Reed, Ross Finlay, Joshka Kaufmann et al.

Lakes can present both risks and opportunities for migratory fishes, yet their role in the life histories of anadromous salmonids remains understudied. Here, we used Passive Integrated Transponder (PIT) telemetry to examine lake‐use patt...

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03 20 October 2026

DOI 10.1111/jfb.70698

Chemical cues affect behaviour in fish lice ( Argulus spp.) and three‐spined stickleback hosts ( Gasterosteus aculeatus )

Open DOI

Stella A. Encel, Ashley J. W. Ward

We found evidence of mutual recognition of chemical cues between fish lice ( Argulus spp.) and three‐spined sticklebacks ( Gasterosteus aculeatus ). Each manifested changes in movement in response to chemical cues from one another; Argul...

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04 19 October 2026

DOI 10.1111/jfb.70703

Molecular and morphological identification of yellow tonguefish ( Symphurus williamsi ) and darkcheek tonguefish ( Symphurus chabanaudi ) at the southern and entrance to the Gulf of California

Open DOI

Rosabel Camacho‐Gastélum, Laura Sánchez‐Velasco, Sylvia P. A. Jiménez‐Rosenberg et al.

The genus Symphurus is a group of demersal fish with high diversity and taxonomic challenges during their early development. This study addressed the morphological and molecular identification of Symphurus larvae in La Bahía de la Paz an...

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05 18 October 2026

DOI 10.1111/jfb.70697

Integrated transcriptomics and histological analysis reveal gill adaptation mechanisms to hypoxic stress in largemouth bass ( Micropterus salmoides )

Open DOI

Xiaoli Ma, Baofeng Su, Anxin Ye et al.

Largemouth bass ( Micropterus salmoides ) is a globally significant freshwater aquaculture species known for its rapid growth, high‐quality flesh and excellent nutritional value. Given the increasing incidence of hypoxia in its aquacultu...

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06 16 October 2026

DOI 10.1111/jfb.70587

Issue Information

Open DOI

07 16 October 2026

DOI 10.1111/jfb.70695

Competitive exclusion, not predation, likely drove the decline in native fish diversity following carnivorous fish introductions to Lake Titicaca in the mid‐20th century

Open DOI

Daniel A. Villar, Renzo Turpo Aroquipa, Cesar Gamarra Peralta et al.

Lake Titicaca is a continental centre for ichthyological biodiversity, with over 90% of native species being endemic. However, these species face significant threats from invasive species, particularly from invasive salmonids and invasiv...

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08 15 October 2026

DOI 10.1111/jfb.70694

Revealing potential Atlantic salmon bycatch hotspots from pelagic fisheries landings across the Northeast Atlantic

Open DOI

Aislinn Borland, Sophie Elliott, Jonathan P. Gillson et al.

Atlantic salmon ( Salmo salar ) marine survival has declined markedly over the past five decades, leading to concerns about future population viability. While many studies have explored the impacts of stressors such as climate change and...

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09 15 October 2026

DOI 10.1111/jfb.70699

Genome‐wide analysis of the caspase gene family in common carp ( C yprinus carpio ) and their transcriptional responses to nitrate exposure

Open DOI

Naime Filiz Karadaş, Esra Yaprak, Harun Arslan et al.

Caspases are a family of cysteine proteases that play essential roles in apoptosis, inflammation and cellular homeostasis. Despite their biological importance, the genomic organization and stress‐related functions of the caspase gene fam...

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10 15 October 2026

DOI 10.1111/jfb.70689

Mismatches between genetic and assessment units in commercial fish species: A systematic review in the North‐East Atlantic

Open DOI

Sara Maggini, Alexander S. T. Papadopulos, Ernesto Jardim et al.

While sustainable fisheries depend upon spatial and temporal identification at below the species level (i.e., stock units), the choice and identification of appropriate units remain challenging. Advances in DNA sequencing and improved co...

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