Reproductive biology and impacts on aquatic species

Insulin-like androgenic gland factor regulates the development of internal and external secondary sexual characteristics in juvenile male kuruma prawn Marsupenaeus japonicus

This study shows that Maj-IAG knockdown in juvenile male kuruma prawns inhibits development of male secondary sexual characteristics but not testicular development or somatic growth.

Histological transition during ovotestis formation in a female-to-male sex-change fish, the harlequin sandsmelt (Parapercis pulchella)

This study examines the histological changes in gonads of female-to-male sex-changing fish, finding that gonads initially develop as ovaries and later transition into ovotestes through the emergence of male germ cells.

Hormonal and Environmental Drivers of Spermiation in the Endangered Mountain Yellow-Legged Frog (Rana muscosa): Toward Biologically Informed Assisted Reproductive Technologies.

This study develops a non-lethal sperm collection protocol for Rana muscosa, finding that 3 µg/g GnRHa yields the highest sperm quality and Wildlife Sperm Index score.

Characterization of the molecular mechanisms of early sexual maturation stages in the Australian greenlip abalone (Haliotis laevigata)

This study identifies key genes and pathways involved in early sexual maturation in greenlip abalone using transcriptomic analysis.

Comprehensive Proteomic, Ultrastructural and Functional Analysis of Cryopreservation Effects on Marine Mussel Oocytes

This study evaluates the effects of cryoprotectants on marine mussel oocytes, finding that ethylene glycol is less cytotoxic than dimethyl sulfoxide and that oxidative stress contributes to cryopreservation failure.

Sperm quality metrics exhibit annual fluctuations in a critically endangered amphibian managed under human care

The study tracks annual fluctuations in sperm quality of captive Puerto Rican crested toads, finding seasonal variations in motility and concentration.

Gamete release in Ciona robusta: roles of gonadotropin-releasing hormone and the photoreception system

This study identifies distinct roles of GnRH1 and GnRH2 in gamete release and ovarian function in Ciona robusta, revealing the OPO as a photoreceptive organ involved in reproductive regulation.

Zebrafish Foxl2l suppresses stemness and directs feminization of germline progenitors

The paper identifies Foxl2l's role in zebrafish germ cell development, showing it suppresses stemness and drives feminization of progenitors.

Identifying sexually dimorphic circulating microRNAs in gonochoristic and hermaphroditic marine fish species.

The paper identifies sex-specific circulating microRNAs in marine fish species to distinguish males from females and track sexual development stages.

Identification of sex-biased miRNA markers informative of heat-past events

The paper identifies sex-biased miRNA markers that reflect past thermal events in European sea bass gonads, with some markers showing conserved sex-skewed expression across multiple fish species.

Clonal analysis reveals differential PGC contributions to the early germline and ovarian reserve

The paper shows that individual PGCs in zebrafish contribute differentially to gonad development and ovarian reserve, generating both self-renewing GSCs and non-renewing progenitors.

Hormonal dynamics reveal a stimulatory role for secretoneurin in zebrafish ovulation

This study shows that secretoneurin stimulates ovulation in zebrafish by increasing gene expression in the hypothalamic-pituitary-ovarian axis and inducing ovulation in anovulatory females.

Mugil cephalus Low-Density Lipoprotein Receptors: protein family characterization and identification of vitellogenin receptors

This study identifies and characterizes vitellogenin receptors in Mugil cephalus using orthology, domain analysis, and structural modeling, revealing their evolutionary conservation and functional relevance in reproduction.

Molecular evidence for pre-chordate origins of ovarian cell types and neuroendocrine control of reproduction

The paper uses sea star ovaries to identify conserved ovarian cell types and an endocrine system, suggesting pre-chordate origins of these features in vertebrates.

Sex-biased gene expression precedes sexual dimorphism in the agonadal annelid Platynereis dumerilii

This study identifies sex-biased gene expression and markers for sex identification in Platynereis dumerilii during gametogenesis, revealing conserved and novel genes involved in spermatogenesis and oogenesis.

Testicular gene expression patterns suggest a heterochronic shift underlying vgll3-mediated maturation age variation in Atlantic salmon

This study investigates how vgll3 alleles influence testicular gene expression patterns and heterochrony in Atlantic salmon, showing accelerated spermatogenesis in vgll3*EE individuals.

Serotonin inhibits sexual receptivity in female cichlid fish

This study shows that high-dose fluoxetine inhibits sexual receptivity in female cichlid fish, suggesting serotonin pathway disruption affects mating behavior and could impact aquatic ecosystems.

Bouncer's receptor on sperm: Investigating sperm-egg compatibility in fish

The paper tests cross-species sperm-egg compatibility in fish by swapping Spaca6 and Izumo1 proteins between medaka and zebrafish, showing that specific molecular interactions are required for fertilization.

Hippo-vgll3 signaling may contribute to sex differences in Atlantic salmon maturation age via contrasting adipose dynamics

The paper investigates how vgll3 genotype and sex influence adipose dynamics and maturation age in Atlantic salmon through gene expression analysis in brain, adipose tissue, and gonads.

Tracking gonadotropin-releasing hormone-mediated movement in-vivo using quantum dot nanoparticles: insights into pathways leading to sperm release

This study tracks GnRHa dispersal in toads using quantum dot nanoparticles to assess how delivery routes affect hormone efficacy and pathways leading to sperm release.

Sex-, development-, and nutrition-dependent expression of a major age-at-maturity gene in Atlantic salmon

This study examines how genetic variation in vgll3 affects maturation age in Atlantic salmon, showing sex- and context-dependent expression patterns and interactions with other genes.

Impacts of global warming on fertility of male fishes: evidence from meta-analysis of temperature effects on spermatozoa motility

This study uses a meta-analysis of 20 fish species to show that increased water temperature reduces sperm motility and related parameters in cold-water species more than in warm-water species.

Adult sex change leads to extensive forebrain reorganization in clownfish

This study uses single nucleus RNA-sequencing to analyze sex differences in the forebrain of clownfish, identifying molecular and cellular changes associated with adult sex change.

A double ovulation protocol for Xenopus laevis produces doubled fertilisation yield and moderately transiently elevated corticosterone levels without loss of egg quality

This study compares single and double ovulation protocols in Xenopus laevis, finding no difference in egg quality or fertilization rates but increased corticosterone levels during the second ovulation.

MELATONIN INDUCES CHANGES ON THE CIRCADIAN RHYTHMS OF REPRODUCTIVE HORMONES DURING SPERMATOGENESIS IN PUBERTAL MALE SEA BASS, Dicentrarchus labrax

This study shows melatonin affects circadian rhythms of reproductive hormones in male sea bass during different reproductive stages, with varying effects on FSH, LH, T, and 11-Kt levels.

Single-cell transcriptome unravels spermatogonial stem cells and dynamic heterogeneity of spermatogenesis in seasonal breeding teleost

This study uses single-cell RNA-seq to characterize spermatogenesis in large yellow croaker, identifying SSCs and metabolic transitions during seasonal breeding.

Fertilization by short-term stored sperm alters DNA methylation patterns in common carp (Cyprinus carpio) embryos at single-base resolution

The paper examines how short-term sperm storage affects DNA methylation in common carp embryos at single-base resolution, identifying 3313 genes with altered methylation.

Role of Y box-binding protein 1 (Ybx1/ybx1) in zebrafish folliculogenesis: Promoting follicle cell proliferation via suppression of cell cycle inhibitor p21 (cdkn1a)

This study shows Ybx1 promotes zebrafish follicle cell proliferation by suppressing p21, essential for folliculogenesis and female fertility.

A salmon fish model reveals genetic signals in brain associated with early maturation

This study identifies genetic and molecular mechanisms in Atlantic salmon brains associated with early maturation, linking the Hippo pathway to reproductive timing.

Paternal-effect genes revealed through semen cryopreservation in Perca fluviatilis

This study identifies paternal-effect genes in fish by comparing progeny from fresh and cryopreserved semen, finding that cryopreservation upregulates genes involved in visual development.