Transgenerational Transfer Research Articles

Shared Traumatic Reality During the Continuous War in Ukraine and the Protective Role of Transgenerational Transfer: Voices of Mental Health Professionals.

Shared traumatic reality has nagative professional effects on mental health providers. The study explores the professional effects of prolonged shared traumatic reality, and the protective role of intergenerational transfer, among Ukrainian psychotherapists during the war with Russia, in the context of their national history of traumatic events. We conducted focus group interviews with 20 Ukrainian therapists who lived and worked in Ukrainian war zones. The recorded transcriptions were analyzed, applying two stages of inductive thematic analysis, and identifying common themes and sub-themes. The main reported negative effect was compassion fatigue, with secondary traumatization and lack of interpersonal and professional support reported as the dominant risk factors. Positive effects included compassion satisfaction and professional growth. The leading protective factors included active coping and social support, while transgenerational transfer of empowering messages increased coping resources. We concluded that intergenerational transfer could promote coping and positive professional effects, especially in the context of chronic shared traumatic reality, suggested as a new construct. Further studies are suggested.

From insects to mammals! Tissue accumulation and transgenerational transfer of micro/nano-plastics through the food chain

Despite extensive global attention on microplastic pollution, our understanding of the pathways underlying microplastic translocation, accumulation, and their potential impacts on ecosystems and human health through the food chain remains incomplete. To investigate the translocation and accumulation of microplastics from insects to mammals, we developed a novel oral exposure model that Tenebrio molitor larvae (yellow mealworms, invertebrate terrestrial insects) were firstly orally exposed to both micro and nanometer-sized plastics (M/NPs), and subsequently fed as a food source to mice (mammals). Our results provide clear evidence that micro/nanoplastics (M/NPs) do indeed translocate through the food chain, from lower to higher trophic levels. Fluorescence microscopy and tissue quantification revealed the accumulation of M/NPs in the digestive, somatic, and circulatory systems of the larvae. Specifically, the food chain transferred M/NPs were later detected in the digestive, respiratory, and urinary systems of mice, showcasing strong fluorescent signals in vital organs such as the lungs, liver, intestines, brain, and kidneys, as well as in embryos. These findings highlight the intricate dynamics of M/NPs contamination, emphasizing their ability to traverse biological barriers, accumulate in organisms, and potentially impact embryonic development via food chain transfer.

How does Antimullerian Hormone Explain the impairment of folliculogenesis in PCOS, its effects on the dysfunctional gonadotropin control, besides its implication in transgenerational transfer of PCOS-A

How does Antimullerian Hormone Explain the impairment of folliculogenesis in PCOS, its effects on the dysfunctional gonadotropin control, besides its implication in transgenerational transfer of PCOS-A

Novel Psychoactive Substance Use and Psychological Trauma: A Multimethodological Analysis

Background Authors discuss the connections between novel psychoactive substance (NPS) use and psychological trauma. The transition from classical substances to NPS, a paradigm change, poses a challenge for the treatment systems. Objective: Research evidence suggests difficulties in emotion regulation and trauma-related NPS-use. Authors explore some demographic and psychopathological characteristics related to such findings and examine the connections between emotion regulation deficiency and the choice of substance. Method This study uses a methodological triangulation of a biologically identified sample to confirm NPS use, a survey method to describe users’ socioeconomic characteristics, and Minnesota Multiphasic Personality Inventory (MMPI-2) subscales to study dysfunctions in emotion regulation. Results Participants (77 patients) were mainly polydrug users. The transgenerational transfer of substance use was a salient feature, but material deprivation was not characteristic of the entire sample. NPS use was not connected to certain psychopathological characteristics the way classical substance use was. More than half of the respondents had elevated scores on MMPI-2 Demoralization (RCd) and Dysfunctional Negative Emotions (RC7) scales. Nearly half of them also scored high on Neuroticism/Negative Emotionality (NEGE). Conclusions Results suggest that NPS use in the context of polydrug use is connected to psychological trauma and emotion regulation deficiency, but the MMPI-2 scales to assess emotional dysfunctions are not connected to a particular type of NPS.

Rhodamine B, an organic environmental pollutant induces reproductive toxicity in parental and teratogenicity in F1 generation in vivo

This study investigated the reproductive toxicity of rhodamine B in zebrafish and its transgenerational effects on the F1 generation. In silico toxicity predictions revealed high toxicity of rhodamine B, mainly targeting pathways associated with the reproductive and endocrine systems. In vivo experiments on zebrafish demonstrated that rhodamine B exposure at a concentration of 1.5 mg/L led to significant impairments in fecundity parameters, particularly affecting females. Histopathological analysis revealed distinct changes in reproductive organs, further confirming the reproductive toxicity of rhodamine B, with females being more susceptible than males. Gene expression studies indicated significant suppression of genes crucial for ovulation in rhodamine B-treated female fish, highlighting hormonal imbalance as a potential mechanism of reproductive toxicity. Furthermore, bioaccumulation studies showed the presence of rhodamine B in both adult fish gonads and F1 generation samples, suggesting transgenerational transfer of the dye. Embryotoxicity studies on F1 generation larvae demonstrated reduced survival rates, lower hatching rates, and increased malformations in groups exposed to rhodamine B. Moreover, rhodamine B induced oxidative stress in F1 generation larvae, as evidenced by elevated levels of reactive oxygen species and altered antioxidant enzyme activity. Neurotoxicity assessments revealed reduced acetylcholinesterase activity, indicating potential neurological impairments in F1 generation larvae. Additionally, locomotory defects and skeletal abnormalities were observed in F1 generation larvae exposed to rhodamine B. This study provides comprehensive evidence of the reproductive toxicity of rhodamine B in adult zebrafish and its transgenerational effects on the F1 generation.

Weaned piglet’s reactivity to humans, tonic immobility and behaviour in a spatial maze test is affected by gestating sows’ relationship to humans and positive handling at weaning

Fear of human can impact negatively offspring’s behaviour and cognition whereas early positive handling has positive impacts. The aim of this study was to evaluate the crossed effects of trans-generational transfer and familiarisation with human on piglets’ behaviour. Sows were classified into two categories (Fearful, n = 11 and Docile, n = 13) based on whether they avoided human contact or not during a human approach test at 71 days of gestation. Fear of human was not related to salivary cortisol levels of the sows (F =2.72, P = 0.10). Fearful sows’ piglets stood immobilized longer (Chisq= 6.24, P = 0.01), as well females (8.70, P = 0.003) during a tonic immobility test (TIT) at 7 days but not at 15 days. The behaviour of two male and two female piglets per sow (n = 96) was studied after weaning (28 days). We found no effect of sow’s reaction to human on piglets’ emotionality expressed during an open-field test (OFT) at 32–33 days. However, during a Human voluntary approach test (VHAT) piglets born from fearful sows were more fearful than piglets born from docile sows (Chisq=8.23, P = 0.004,). Half of the piglets (n = 48, 1 male and 1 female per sow) were then familiarised with human while the others received minimum contact. We found no main or crossed effect of sow’s reaction to human and piglet’s treatment on piglets’ emotionality during an OFT, nor on their exploratory behaviour during VHAT at 46–47 days. Piglets’ born from fearful sows were less attracted to human during VHAT2 (Chisq=8.33, P = 0.004) and familiarised piglets were more attracted (Chisq=15.05, P < 0.001). Piglets born from docile sows found the reward faster in a spatial maze test than those born from fearful sows. Both sows HAR and piglet familiarisation with human seemed to specifically affect human related behaviours without affecting their general emotionality, but also behaviour in a spatial maze test.

Epigenetic Control of Plant Response to Heavy Metals.

Plants are sessile organisms that must adapt to environmental conditions, such as soil characteristics, by adjusting their development during their entire life cycle. In case of low-distance seed dispersal, the new generations are challenged with the same abiotic stress encountered by the parents. Epigenetic modification is an effective option that allows plants to face an environmental constraint and to share the same adaptative strategy with their progeny through transgenerational inheritance. This is the topic of the presented review that reports the scientific progress, up to date, gained in unravelling the epigenetic response of plants to soil contamination by heavy metals and metalloids, collectively known as potentially toxic elements. The effect of the microbial community inhabiting the rhizosphere is also considered, as the evidence of a transgenerational transfer of the epigenetic status that contributes to the activation in plants of response mechanisms to soil pollution.

Profile, Tissue Distribution, and Time Trend of Bisphenol Plastic Additives in Freshwater Wildlife of the Pearl River Ecosystem, China.

Plastic-related contaminants in the environment have attracted increasing attention, with plastic pollution becoming a serious issue globally. The present study investigated the potential bioaccumulation and biotransfer of bisphenol (BP) compounds that are widely added in various products such as plastics and other products in a freshwater ecosystem, China. Among commonly applied 14 BP analogues, bisphenol A (BPA), bisphenol F (BPF), and bisphenol S (BPS) were predominant, representing 64%-100% of the total concentrations of BPs (ΣBPs) in freshwater wildlife. Both the concentrations and analogue profiles in the fish showed seasonal differences and species dependence. Higher BP concentrations were observed in fish collected during the dry season than the wet season. Higher percentages of non-BPA analogues (e.g., BPS and BPF) were observed in fish collected during the wet season. Pelagic species accumulated notably higher levels of BPs than midwater and bottom species. The liver generally contained the highest ΣBPs, followed successively by the swim bladder, belly fat, and dorsal muscle. The analogue profile also showed some differences among tissues, varying by species and season. Lower ΣBPs but higher percentages of non-BPA analogues were observed in female than male common carp. Time trends of the BPA concentration in fish varied by species, probably related to habitats and diets of the fish. Habitats, feeding behaviors, and trophic transfer may have significant impacts on exposure of wildlife to BPs in natural ecosystems. The BPs did not demonstrate strong potential for bioaccumulation. More research is warranted about metabolism and transgenerational transfer of BPs in wildlife to fully reveal the bioaccumulation and consequently ecological risks of these chemicals in the environment. Environ Toxicol Chem 2023;42:2130-2142. © 2023 SETAC.

Prostasomes as interlocutor for zygotic epigenome health: role of prostasomesecretome in maintenance of zygotic epigenome

Prostasomes as transgenerational epigenetic tool box has not been established, its role in transferring small RNA, lncRNA as paternal messages is yet to be explored. The present study was undertaken to establish role of prostasomes in modulating testicular and vaginal environmental cues such as protein and RNA messages through to zygote and thereby actin gas interlocutor of paternal genome. The results from the study found out prostasomes fusion with spermatozoa takes place at the time of maturation and capacitation wherein it causes downregulation of ROS (Protein and mRNA) in terms of decreased NADPH and NOS activity significantly (p&lt;0.01), it was also found to modulate mitochondrial membrane potential significantly(p&lt;0.01). Prostasome supplementation lead to increased survival of spermatozoa in sp-TALP medium and was found to be superior to cryopreserved and fresh semen when used in routine in vitro fertilization (IVF) experiment. The study further envisages to establish prostasomes as repository of novel biomarkers for infertility in male and female and as diagnostic tool in in vitro fertilization and somatic cell nuclear transfer protocol and thereby establishing prostasomes as one of the fundamental vesicles influencing transgenerational transfer of RNA and protein to zygotic genome thereby influencing zygotic genome health.

Transgenerational transfer of the microbiome is altered by ocean acidification in oyster larvae

Ocean acidification will affect marine molluscs, however, transgenerational plasticity (TGP) can ameliorate some effects. Marine molluscs acquire members of their microbiome via the egg, yet we know little about how the microbiome can be influenced by transgenerational exposure to ocean acidification. We exposed adult Sydney Rock oysters (Saccostrea glomerata) from four genotypes to elevated and ambient PCO2 for nine weeks. Larvae were then raised in the same ambient and elevated PCO2 conditions. The relative abundance of bacteria in eggs and larvae were characterised using 16S RNA amplicon sequencing. Parental exposure to elevated PCO2 significantly altered the bacterial community composition of both eggs and larvae, but this was dependent on genotype. Parental exposure to elevated PCO2 caused five core Rhodobacteraceae ASVs to increase in relative abundance, and three Rhodobacteraceae ASVs to decrease in relative abundance. These findings show transfer of maternal microbiomes to larvae is altered by exposure to ocean acidification and this may play a role in TGP.

From a Distance: Orna Ben-Dor’s Holocaust Quintet

Orna Ben-Dor (1954- ) is one Israel's most prominent filmmakers and television directors. By the 2000s Ben-Dor had directed four films with Holocaust survivors as her main protagonists. The article analyzes the central themes in Ben-Dor's Holocaust-related films and explains how the director maintains a perspective of distance. Because she so often relates in film interviews to her parents' Holocaust and her sensitivity as a second-generation Holocaust survivor, one might have expected her to engage with the topic in her autobiographical documentary, released in 2009. However, as this article will show, Ben-Dor downplays the Holocaust in this film and turns the camera inward to focus on gender rather than on the hallmark themes of her previous films: PTSD of Holocaust survivors, the transgenerational transfer of trauma to the second generation and the absorption of Holocaust survivors in Israel. As a director who has played such an important part in Israel's Holocaust commemoration, Ben-Dor remains strangely reticent about her own personal Holocaust-related story.

Highlighting the trajectory from intrauterine growth restriction to future obesity.

During the last decades several lines of evidence reported the association of an adverse intrauterine environment, leading to intrauterine restriction, with future disease, such as obesity and metabolic syndrome, both leading to increased cardiovascular and cancer risk. The underlying explanation for this association has firstly been expressed by the Barker's hypothesis, the "thrifty phenotype hypothesis". According to this hypothesis, a fetus facing an adverse intrauterine environment adapts to this environment through a reprogramming of its endocrine-metabolic status, during the crucial window of developmental plasticity to save energy for survival, providing less energy and nutrients to the organs that are not essential for survival. This theory evolved to the concept of the developmental origin of health and disease (DOHaD). Thus, in the setting of an adverse, f. ex. protein restricted intrauterine environment, while the energy is mainly directed to the brain, the peripheral organs, f.ex. the muscles and the liver undergo an adaptation that is expressed through insulin resistance. The adaptation at the hepatic level predisposes to future dyslipidemia, the modifications at the vascular level to endothelial damage and future hypertension and, overall, through the insulin resistance to the development of metabolic syndrome. All these adaptations are suggested to take place through epigenetic modifications of the expression of genes without change of their amino-acid sequence. The epigenetic modifications leading to future obesity and cardiovascular risk are thought to induce appetite dysregulation, promoting food intake and adipogenesis, facilitating obesity development. The epigenetic modifications may even persist into the next generation even though the subsequent generation has not been exposed to an adverse intrauterine environment, a notion defined as the "transgenerational transfer of environmental information". As a consequence, if the increased public health burden and costs of non-communicable chronic diseases such as obesity, hypertension, metabolic syndrome and type 2 diabetes have to be minimized, special attention should be laid to the healthy lifestyle habits of women of reproductive age, including healthy diet and physical activity to be established long before any pregnancy takes place in order to provide the best conditions for both somatic and mental health of future generations.

Inherited Revolution. Narratives in Transgenerational Memory Transfer

AbstractOur essay deals with narratives of social upheaval that act as vehicles for transgenerational memory transfer. We look at narratives of collectively experienced processes of emancipation and the subsequent possibility of remembering things not experienced firsthand under the prism of the political event of revolution understood as an inherently violent process (Arendt 1990). In this context, we inquire about postmemory along similar lines to those staked out by Marianne Hirsch, while also considering whether the term can be separated from trauma and linked to other emotional responses of comparable affective intensity. Memories of violence are frequently disjointed and impressionistic. The connection of fragments to a narrative context is often severed while the action of linking the threads into a coherent narrative faces vehement resistance. In principle, this is not different from the experience of violence in revolutions and their remembrance. However, narratives on revolution tend to exert a strong force of attraction upon their recipients. Considering the figures ofcycle,linear progression,iteration,disruptionandirreversibilityas the time modes of revolution, we look at how these have enabled entirely new understandings of time since the nineteenth century. New forms of temporality, in turn, are entangled with the roledisplacementplays in the relationship between a transgenerational transfer of narratives and the construction of narrative time.In order to explore how a generation deals with the dominance (Hirsch 2012) of the narratives transmitted to them by the preceding one, we deal with two models in which affective states charged with both suffering and pleasure are developed into terms of cultural and literary theory: Bini Adamczak’s reading ofdesireas fetish in post-revolutionary Soviet Russia, and Svetlana Boym’s work onnostalgiaas an emotional disposition characteristic for modernity. Taking into account that both models are more or less constructed by cultural practices, historical events, and transformations in the history of ideas, and thus cannot always be precisely distinguished from one another, we present two main narrative strategies: The reception of the stories of one generation by another involves either contracting the affective intensity of their narratives at the expense of linear time or expanding narrative time far beyond individual life spans. For our analysis we mainly refer to Rodolfo Usigli’sEnsayo de un crimenand Heinrich Heine’sLudwig Börne: A Memorialas post memory narratives on revolution. We understand them as examples of each narrative strategy and as part of the dialectic of this way of remembering.

Transgenerational mass balance and tissue distribution of PCBs and PCDD/Fs from grass silage and soil into cow-calf continuum

Grass-based suckling beef-derived foods occasionally exceed regulatory levels for polychlorinated biphenyls (PCBs) and dibenzo-p-dioxins/dibenzofurans (PCDD/Fs). Ensuring chemical safety requires understanding the cow-calf transgenerational PCB and PCDD/F fate. The current focus was on dairy cows, omitting transgenerational fate and suckling beef-related physiological effects. This study aimed to investigate PCB and PCDD/F absorption, distribution, metabolism, and excretion within 12 Simmental cows (six primiparous/six multiparous) and 12 calves fed with the milk of their respective mothers for 109 days prepartum until 288 days in milk (DIM), i.e., slaughter time. Eight cows were exposed to a grass silage-soil mixture. Four were decontaminated after DIM164 by receiving uncontaminated grass silage, which four control cows received. An input-output balance during gestation and lactation was computed from PCB, PCDD/F, and lipid inputs (solid feed/milk intakes), outputs (fecal/milk excretions), and body storage (initial/final burdens). At slaughter, PCB and PCDD/F tissue distribution, and lipid allometry were linked. Apparent PCB and PCDD/F absorption rates and metabolized fractions decreased with increasing chlorination. In calves, PCB absorption showed no effect due to chlorination (steady range: 71–87%). High-chlorinated PCB and PCDD/F absorption rates decreased when provided through soil. Cows excreted PCBs and PCDD/Fs via feces (50% relative to input) and milk (9%) and accumulated only 5% in their body, whereas calves accumulated the largest fraction of the total input in their bodies (44%). Cow physiology affected accumulation and excretion, as in primiparous cows, net body burden and milk assimilation efficiencies were higher and lower, respectively, than in multiparous. Liver-specific enrichment was observed in cows and calves (7.0- and 3.2-fold iPCB and dlPCB + PCDD/F TEQ, compared to empty body-based lipid concentrations), whereas iPCBs were also enriched in kidneys (3.1-fold) and muscles (1.5-fold). Consequently, adipose concentrations did not perfectly represent most edible beef tissues. This highlights the essence of integrating the interplay between physicochemical pollutant properties and animal physiology in transgenerational transfer assessments of PCBs and PCDD/Fs.

Transgenerational responses to climate change in Mediterranean annual species with contrasting functional strategies

Increasing temperature and aridity predicted by climate change models in the Mediterranean region will pose a significant challenge for the survival of some plant species. The mechanisms by which species modify their phenotype across generations in response to the environment have been identified as essential to cope with the new climatic conditions. However, this transgenerational transfer remains unexplored for species with contrasted resource-use strategies (fast-growing or acquisitive versus stress-tolerant or conservative species). For this purpose, transgenerational responses to warming and drought of annual plant species with different resource-use strategies were assessed by conducting three experiments. In a field experiment, climatic treatments of increased temperature and rainfall exclusion were imposed on five herbaceous species typical of Mediterranean grasslands. The descendants of the individuals sampled in the field were employed in two greenhouse experiments to: (1) analyze the transgenerational response by re-imposing warming and drought conditions, and (2) identify possible maternal effects by maintaining them at optimal conditions of air temperature and water availability and comparing with maternal performance. We measured reproductive output, plant growth and survival variables as plant performance indicators. We found contrasting transgenerational responses to warming and drought depending on the functional strategy of the species. Direct effects of the abiotic stressors on parental plants were retained or new ones appeared in their offspring, with special negative impact on one of the most acquisitive species ( Crepis capillaris ). In contrast, the most conservative species ( Bromus madritensis ) highly tolerated increased climatic stress but deleterious maternal effects were registered, given the high negative impact on the performance of the descendants of maternal plants that were subjected to climatic treatments. Our study highlights the importance of evaluating plant responses to stress across generations to better understand their potential ability to face new environmental conditions in species with different functional strategies. • Transgenerational response to climate change varies with plant functional strategy. • Acquisitive plant species are highly sensitive to warming and drought. • Maternal effects compromise the response to climate change of conservative species.

How does Antimullerian Hormone Explain the impairment of folliculogenesis in PCOS, its effects on the dysfunctional gonadotropin control, besides its implication in transgenerational transfer of PCOS-A Systematic Review

How does Antimullerian Hormone Explain the impairment of folliculogenesis in PCOS, its effects on the dysfunctional gonadotropin control, besides its implication in transgenerational transfer of PCOS-A Systematic Review

Grandmaternal cells in cord blood

sBackgroundDuring pregnancy a feto-maternal exchange of cells through the placenta conducts to maternal microchimerism (Mc) in the child and fetal Mc in the mother. Because of this bidirectional traffic of cells, pregnant women have also acquired maternal cells in utero from their mother and could transfer grandmaternal (GdM) cells to their child through the maternal bloodstream during pregnancy. Thus, cord blood (CB) samples could theoretically carry GdMMc. Nevertheless this has never been demonstrated.MethodsUsing Human Leukocyte Antigen (HLA)-specific quantitative PCR assays on three-generation families, we were able to test 28 CB samples from healthy primigravid women for GdMMc in whole blood (WB) and isolated cells (PBMC, T, B, granulocytes, stem cells).FindingsFive CB samples (18%) had GdMMc which could not be confounded with maternal source, with quantities 100 fold lower than maternal Mc in WB and PBMC. Risk of aneuploidies and/or related invasive prenatal procedures significantly correlated with the presence of GdMMc in CB (p=0.024). Significantly decreased HLA compatibility was observed in three-generation families from CB samples carrying GdMMc (p=0.019).InterpretationTransgenerational transfer of cells could have implications in immunology and evolution. Further analyses will be necessary to evaluate whether GdMMc in CB is a passive or immunologically active transfer and whether invasive prenatal procedures could trigger GdMMc.FundingProvence-Alpes-Côte d'Azur APEX grant # 2012_06549E, 2012_11786F and 2014_03978) and the Foundation for Medical Research (FRM Grant #ING20140129045).

Obesity and pregnancy, the perfect metabolic storm.

Pregnancy is a physiological stress that requires dynamic, regulated changes affecting maternal and fetal adiposity. Excessive accumulation of dysfunctional adipose tissue defined by metabolic and molecular alterations cause severe health consequences for mother and fetus. When subjected to sustained overnutrition, the cellular and lipid composition of the adipose tissue changes predisposing to insulin resistance, diabetes, and other metabolic disorders compromising the outcome of the pregnancy. Moreover, excessive maternal weight gain, usually in the context of obesity, predisposes to an increased flux of nutrients from mother to fetus throughout the placenta. The fetus of an obese mother will accumulate more adiposity and may increase the risk of future metabolic disorder later in life. Thus, further understanding of the interaction between maternal metabolism, epigenetic regulation of the adipose tissue, and their transgenerational transfer are required to mitigate the adverse health outcomes for the mother and the fetus associated with maternal obesity.

Correction to: 'How do developmental and parental exposures to predation affect personality and immediate behavioural plasticity in the snail Physa acuta?'

Correction to: 'How do developmental and parental exposures to predation affect personality and immediate behavioural plasticity in the snail Physa acuta?'

Lifetime bioaccumulation, gender difference, tissue distribution, and parental transfer of organophosphorus plastic additives in freshwater fish.

Plastic pollution has been a growing global issue. Various plastic additives may enter the environment with plastic debris, which could also become contaminants. Lifetime bioaccumulation, gender difference, tissue distribution, and parental transfer potential of commonly applied organophosphorus plastic additives (OPPAs) were investigated in wildlife fish of the Pearl River system, China. The OPPAs were widely detected in 7 consumable fish species. Tris (2-chloropropyl) phosphate was the predominant compound, with a median concentration of 18.8ng/g lipid weight. The total OPPA concentrations (ΣOPPAs) were higher in the livers and swimming bladders, suggesting important roles of lipophilicity on the OPPAs accumulation in the fish. Besides, the livers were more abundant in the non-chlorinated OPPAs relative to the other tissues, indicating potentially stronger metabolism of the chlorinated OPPAs in the livers. Redbelly tilapia contained obviously lower ΣOPPAs than the other species. On the other hand, proportions of the chlorinated OPPAs were obviously lower in barbel chub and Guangdong black bream. For an individual species, higher ΣOPPAs were usually detected in the female than in the male fish. Furthermore, the females contained higher proportions of the non-chlorinated OPPAs. These results suggested potentially more accumulation of the OPPAs, particularly the non-chlorinated OPPAs in the female than in the male fish. Body weight dependence of the OPPAs accumulation showed varied patterns depending on species, tissue, and compound. Species-specific characteristics affected by both ecology and organisms' physiology should be considered in combination in assessing bioaccumulation of the OPPAs. The OPPAs were slightly bioaccumulative with LogBAFs of 1.2-3.3. The OPPAs did not show obvious inclination to be partitioned to biota from sediment. Omnipresence of the OPPAs in both egg/ovary and testis of the fish suggested potential transgenerational transfer of these chemicals, which can be a serious ecological issue and warrants further research.