Fluctuating and Stable High Temperatures Differentially Affect Reproductive Endocrinology of Female Pupfish

Integrative Organismal Biology, Journal Year: 2024, Volume and Issue: 6(1)

Published: Jan. 1, 2024

Synopsis For many fishes, reproductive function is thermally constrained such that exposure to temperatures above some upper threshold has detrimental effects on gametic development and maturation, spawning frequency, mating behavior. Such impairment of performance at elevated involves changes hypothalamic–pituitary–gonadal (HPG) axis signaling diminished gonadal steroidogenesis. However, how HPG pathways respond consistently high versus temporally not clear. Here, sexually mature Amargosa River Pupfish (Cyprinodon nevadensis amargosae) were maintained under thermal regimes either stable ∼25°C (low temperature), diurnal cycling between ∼27 35°C (fluctuating or ∼35°C (high temperature) conditions for 50 days examine these endocrine components in the pituitary gland gonad, ovarian testicular gametogenesis status, liver gene expression relating oogenesis. Female pupfish fluctuating temperature treatments showed reduced gonadosomatic index values as well a lower proportion oocytes lipid droplet vitellogenic stages. Females both exhibited mRNAs steroid acute regulatory protein (star), cholesterol side chain-cleavage enzyme, P450scc (cyp11a1), 3β-hydroxysteroid dehydrogenase (3bhsd), while transcripts encoding 11β-hydroxysteroid (11bhsd) sex hormone-binding globulin (shbg) females constant only. Ovarian aromatase (cyp19a1a) mRNA levels unaffected, but circulating 17β-estradiol (E2) was compared condition. In liver, choriogenins vitellogenin downregulated conditions, hepatic estrogen receptor 2a (esr2a) shbg females. Taken together, results demonstrate potential impair steroidogenesis reduce egg envelope production female C. n. amargosae pupfish, also shedding light only intermittently reach range reproduction have differential impacts than constantly warm conditions.

Language: Английский

---

Accustomed to the heat: Temperature and thyroid hormone influences on oogenesis and gonadal steroidogenesis pathways vary among populations of Amargosa pupfish (Cyprinodon nevadensis amargosae)

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Journal Year: 2022, Volume and Issue: 272, P. 111280 - 111280

Published: July 26, 2022

Many fish experience diminished reproductive performance under atypically high or prolonged elevations of temperature. Such temperature inhibition reproduction comes about in part from altered stimulation gametogenesis by the hypothalamic-pituitary-gonadal (HPG) endocrine axis. Elevated temperatures have also been shown to affect thyroid hormone (TH) signaling, and TH status may impact via crosstalk with HPG axis pathways. Here, we examined effects 3′-triiodo-L-thyronine (T3) on pathways for gonadal steroidogenesis Amargosa pupfish (Cyprinodon nevadensis amargosae) two allopatric populations: 1) River – a highly variable habitat, 2) Tecopa Bore an invariably warm groundwater-fed marsh. These populations were previously differ signaling profiles both wild common laboratory conditions. Sexually-mature each population maintained at 24 °C 34 88 days, after which subset was treated T3 18–24 h. In populations, mRNA abundances follicle-stimulating receptor luteinizing higher ovary testis compared °C. Females but not had greater ovarian transcript steroidogenic enzymes cytochrome P450 aromatase, 3β-hydroxysteroid dehydrogenase, 17β-hydroxysteroid dehydrogenase °C, as well liver levels vitellogenins choriogenins cooler Transcript estrogen receptors esr1, esr2a, esr2b reduced females, females. augmented gene steroid acute regulatory protein (StAR) transporter sexes populations. downregulated mRNAs females warmer habitat only, suggesting modulation E2 sensitivity possible mechanism whereby temperature-induced changes contribute shifts thermal oogenesis.

Language: Английский

---

Effects of temperature on acoustic and visual courtship and reproductive success in the two-spotted goby Pomatoschistus flavescens

Marine Environmental Research, Journal Year: 2023, Volume and Issue: 192, P. 106197 - 106197

Published: Sept. 28, 2023

Fish are ectothermic and small changes in water temperature could greatly affect reproduction. The two-spotted goby is a semi-pelagic species that uses visual acoustic displays to mate. Here, we studied the effect of (16 20 °C) on courtship associated reproductive success 39 males. Temperature influenced male performed outside nest, but it did not influence calling rate number laid eggs. Interestingly, sounds (drums) was sole predictor spawning success. These findings suggest exposure different temperatures within species' natural range behaviour its We propose finding link between reproduction fishes offers opportunity monitor fish both lab nature learn how they respond environmental human impacts, namely global warming.

Language: Английский

---

Transcriptomics Reveal the Effects of Breeding Temperature on Growth and Metabolism in the Early Developmental Stage of Platax teira

Biology, Journal Year: 2023, Volume and Issue: 12(9), P. 1161 - 1161

Published: Aug. 23, 2023

The growth, development, and survival of fish, especially in the early stages is influenced by a complex environmental factors, among which temperature one most important. Although physiological effects stress fish have been extensively studied, molecular mechanisms are poorly understood. However, recent advances transcriptomic techniques facilitated study responses aquatic species. Here, we aimed to elucidate breeding temperatures (21, 24, 27, 30 °C) on growth nutrient metabolism developmental stage Platax teira, using techniques. Transcriptomic analysis identified 5492, 6937, 4246 differentially expressed genes (DEGs) 21 vs. 24 °C, 27 °C comparisons, respectively, were involved cell processes, single organism, metabolism, catalytic activity, part, based gene ontology (GO) functional annotations. Kyoto Encyclopedia Genes Genomes (KEGG) enrichment showed that DEGs mainly enriched pathways related matter energy, protein digestion absorption, glucose lipid metabolism. Additionally, expression lipid, liver was upregulated under low-temperature condition (21 °C), although increasing within acceptable threshold improved fish. Meanwhile, suppressed an extremely high (30 owing oxidative stress. Overall, it shown thermal P. optimal range 24-27 °C. Through transcriptomics, regulatory mechanism larval development teira different elucidated, with goal establishing theoretical basis for industrial breeding.

Language: Английский

---

Transient receptor potential (TRP) channels in Sebastes schlegelii: Genome-wide identification and ThermoTRP expression analysis under high-temperature

Gene, Journal Year: 2024, Volume and Issue: 910, P. 148317 - 148317

Published: Feb. 28, 2024

Language: Английский

---

Elevated temperature impairs gonadal development by suppressing the expression of the genes for kisspeptin, GnRH1 and GTH subunits in Nile tilapia Oreochromis niloticus

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Journal Year: 2024, Volume and Issue: 297, P. 111714 - 111714

Published: July 30, 2024

Language: Английский

---

Effect of long-term temperature-controlled rearing on growth traits and sexual maturity of common carp (Cyprinus carpio)

Aquaculture, Journal Year: 2024, Volume and Issue: 593, P. 741271 - 741271

Published: June 22, 2024

Language: Английский

---

Life history traits and MaxEnt model reveal that climate change facilitates the spread of the non-native fish species Carassius auratus on the Qinghai-Tibet Plateau

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 27, 2024

The unique ecosystem and biodiversity of the Qinghai-Tibet Plateau are particularly sensitive to global climate change.In recent years, as warming intensifies, has been trending towards warmer more humid conditions, exacerbating invasion non-native fish species in Tibet.Based on considerations representativeness, data availability, ecological impact, our study selected Carassius auratus a model explore adaptive changes life history traits invasive from plains plateaus.We elucidated mechanisms rapid population establishment C.auratus characteristics its population's ability withstand pressure poor longterm stability, governance suggestions were proposed.Additionally, we used MaxEnt distribution predict risk zones for under SSP2.6,SSP4.5, SSP7.0, SSP8.5 scenarios by incorporating 19 climatic factors data.We also assessed impact density hydropower station construction potential suitable habitats Plateau.Our findings indicate that change will facilitate spread Plateau, intensity reproductive activities risks plateau continue increase future.In next step, plan actively address through cooperation integrated management.Our goal is effectively reduce negative impacts biological invasions plateau, thereby protecting biodiversity.

Language: Английский

---

Artificial Induction of Spawning in Threeline Grunt, Parapristipoma trilineatum Under Controlled Environmental Conditions

Fishes, Journal Year: 2024, Volume and Issue: 9(11), P. 453 - 453

Published: Nov. 7, 2024

The threeline grunt (Parapristipoma trilineatum) is a recently introduced aquaculture species that has attracted considerable interest in Korea. However, research on its potential and reproductive biology remains limited. This study aimed to investigate the natural cycle feasibility of manipulating spawning period through environmental control. We designed an changes protocol involving gradual increase water temperature (16 °C → 21 °C) extension photoperiod (10 L 14 L) from January April compared group exposed these conditions those maintained under conditions. experimental exhibited significantly higher plasma sex steroid hormone levels at 60 90 days gonadosomatic index 100 days. In addition, spawned between June, approximately 2 months earlier than control group. Despite spawning, no significant differences were found egg diameter, hatching rate, larval notochord length. These findings suggest can be accelerated photothermal without negatively impacting quality. provides valuable insights into highlights utilizing enhance production.

Language: Английский

---

Reproductive biology of long-whiskered catfish (Mystus aor) relative to temperature and precipitation from the Kaptai Lake of Bangladesh

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(11), P. e0312835 - e0312835

Published: Nov. 11, 2024

Life-history information is necessary for effective conservation, aquaculture development and broodstock management of fishing populations, especially fish with significant economic exploitation. Aiming to characterise the life-history traits in relation environmental parameters long-whiskered catfish, Mystus aor , a commercially important species from Kaptai Lake, Bangladesh, different data were analysed. The monthly condition factor (K) ranged 1.15 1.41, relative (Kn) 0.14 0.25. estimated fecundity was 18474−55504 eggs/per fish, maximal oocyte diameter found May (0.83 ± 0.11μm). lengths at first sexual maturity ( L m ) male female M . 49.5 cm 54.1 cm, respectively. GSI peaked both males females, histological analysis also revealed presence yolk granules several mature spermatids April sexes. Analysis over 40 years lake ecosystem indicate increase precipitation rate spawning month which highly correlated season. findings current study will serve as baseline conservation Lake Bangladesh.

Language: Английский

---