Journal of experimental zoology. Part A, Ecological and integrative physiology最新文献_第10页

The effect of fishing-capture stress on the oxygen uptake rate and swimming activity of the holocephalan Callorhinchus milii 捕捞应激对全长头足类(Callorhinchus milii)摄氧量和游泳活动的影响

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-29 DOI: 10.1002/jez.2775

Licia Finotto, Terence I. Walker, Richard D. Reina

{"title":"The effect of fishing-capture stress on the oxygen uptake rate and swimming activity of the holocephalan Callorhinchus milii","authors":"Licia Finotto, Terence I. Walker, Richard D. Reina","doi":"10.1002/jez.2775","DOIUrl":"10.1002/jez.2775","url":null,"abstract":"Overfishing, capture mortality, and consequences following the release of surviving animals represent severe threats to chondrichthyans. Although holocephalans are common bycaught and discarded species, other than postrelease mortality, little is known of fishing capture stress impacts. The stress response elicited after capture, essential to increase survival chances, is energetically demanding and affects the amount of energy available for other biological activities, with potential long-term impairments. We measured the effect of 30-min simulated gillnet capture on oxygen uptake rate (ṀO2), a proxy for metabolic rate and energy use, on recovery pattern, and on swimming activity of elephant fish (Callorhinchus milii). Immediately after simulated capture, Active and Inactive ṀO2, measured during swimming and resting periods, respectively, were 27.5% and 43.1% lower than precapture values. This metabolic decline is likely an adaptation for reducing the energy allocated to non-essential activities, thus preserving it to sustain the stress response and processes essential for immediate survival. Supporting this, after gillnet capture, animals decreased their swimming time by 26.6%, probably due to a reduction in the energy allocated to movement. After 7 days, swimming activity and both Inactive ṀO2 and Active ṀO2 returned to precapture values. Although metabolic decline may enhance survival chances, the associated decreased swimming activity might increase predation risk and slow the physiological recovery after a fishing event. Moreover, some of the activities involved in Inactive ṀO2 are fundamental for life maintenance and therefore its depression after a capture event might have long-term repercussions for life sustenance and health.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jez.2775","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139064405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of methomyl-induced adrenal gland disruption in rat fetuses and pups: Potential protective effects of propolis supplementation 评估甲氧苄啶诱发的大鼠胎儿和幼鼠肾上腺破坏：补充蜂胶的潜在保护作用。

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-28 DOI: 10.1002/jez.2777

Marwa N. Atallah, Gamal M. Badawy, Fatma S. Abdallah, Hend T. El-Borm

{"title":"Assessment of methomyl-induced adrenal gland disruption in rat fetuses and pups: Potential protective effects of propolis supplementation","authors":"Marwa N. Atallah, Gamal M. Badawy, Fatma S. Abdallah, Hend T. El-Borm","doi":"10.1002/jez.2777","DOIUrl":"10.1002/jez.2777","url":null,"abstract":"The present study aimed to unravel the possible adverse effects of methomyl on the developing adrenal gland of rat fetuses and pups. Additionally, this study explored the potential improving effects of propolis against these possible hazards induced by methomyl exposure. To achieve that, pregnant rats were divided into four groups: control group, received 1 mL distilled water, propolis group, received 1 mL propolis at a dose of 300 mg/kg, methomyl group, received 1 mL methomyl at a dose of 2 mg/kg, and combined group, received 1 mL methomyl followed by 1 mL propolis, an hour later at the same previous doses. The results revealed that methomyl exposure, during pregnancy and lactation, induced many histological and ultrastructural changes, caused DNA damage and downregulated the expression of steroidogenic acute regulatory (StAR) and CYP11B2 genes in the adrenal glands of both rat fetuses and pups. Interestingly, propolis supplementation demonstrated a remarkable ability to mitigate these deleterious effects and restored the histology and ultrastructure architecture of the adrenal glands of both fetuses and pups, as well as decreased DNA damage and upregulated the expression of StAR and CYP11B2 genes in the adrenal gland of rat fetuses and pups. In conclusion, our study highlights the potential hazardous impact of methomyl exposure during pregnancy and lactation on the development of the adrenal gland in rat fetuses and pups, moreover, the study presents a new approach to alleviate these effects through propolis administration which could be used as a dietary supplement to mitigate the adverse effects of methomyl exposure.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139058404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unleashing diversity through flexibility: The evolutionary journey of sex chromosomes in amphibians and reptiles 通过灵活性释放多样性：两栖动物和爬行动物性染色体的进化历程。

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-28 DOI: 10.1002/jez.2776

Yoshinobu Uno, Kazumi Matsubara

{"title":"Unleashing diversity through flexibility: The evolutionary journey of sex chromosomes in amphibians and reptiles","authors":"Yoshinobu Uno, Kazumi Matsubara","doi":"10.1002/jez.2776","DOIUrl":"10.1002/jez.2776","url":null,"abstract":"Sex determination systems have greatly diversified between amphibians and reptiles, with such as the different sex chromosome compositions within a single species and transition between temperature-dependent sex determination (TSD) and genetic sex determination (GSD). In most sex chromosome studies on amphibians and reptiles, the whole-genome sequence of Xenopous tropicalis and chicken have been used as references to compare the chromosome homology of sex chromosomes among each of these taxonomic groups, respectively. In the present study, we reviewed existing reports on sex chromosomes, including karyotypes, in amphibians and reptiles. Furthermore, we compared the identified genetic linkages of sex chromosomes in amphibians and reptiles with the chicken genome as a reference, which is believed to resemble the ancestral tetrapod karyotype. Our findings revealed that sex chromosomes in amphibians are derived from genetic linkages homologous to various chicken chromosomes, even among several frogs within single families, such as Ranidae and Pipidae. In contrast, sex chromosomes in reptiles exhibit conserved genetic linkages with chicken chromosomes, not only across most species within a single family, but also within closely related families. The diversity of sex chromosomes in amphibians and reptiles may be attributed to the flexibility of their sex determination systems, including the ease of sex reversal in these animals.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jez.2776","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139058407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Does stress make males? An experiment on the role of glucocorticoids in anuran sex reversal 压力会产生雄性吗？糖皮质激素在蝾螈性别逆转中的作用实验

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-28 DOI: 10.1002/jez.2772

Veronika Bókony, Csenge Kalina, Nikolett Ujhegyi, Zsanett Mikó, Kinga Katalin Lefler, Nóra Vili, Zoltán Gál, Caitlin R. Gabor, Orsolya Ivett Hoffmann

{"title":"Does stress make males? An experiment on the role of glucocorticoids in anuran sex reversal","authors":"Veronika Bókony, Csenge Kalina, Nikolett Ujhegyi, Zsanett Mikó, Kinga Katalin Lefler, Nóra Vili, Zoltán Gál, Caitlin R. Gabor, Orsolya Ivett Hoffmann","doi":"10.1002/jez.2772","DOIUrl":"10.1002/jez.2772","url":null,"abstract":"Environmentally sensitive sex determination may help organisms adapt to environmental change but also makes them vulnerable to anthropogenic stressors, with diverse consequences for population dynamics and evolution. The mechanisms translating environmental stimuli to sex are controversial: although several fish experiments supported the mediator role of glucocorticoid hormones, results on some reptiles challenged it. We tested this hypothesis in amphibians by investigating the effect of corticosterone on sex determination in agile frogs (Rana dalmatina). This species is liable to environmental sex reversal whereby genetic females develop into phenotypic males. After exposing tadpoles during sex determination to waterborne corticosterone, the proportion of genetic females with testes or ovotestes increased from 11% to up to 32% at 3 out of 4 concentrations. These differences were not statistically significant except for the group treated with 10 nM corticosterone, and there was no monotonous dose-effect relationship. These findings suggest that corticosterone is unlikely to mediate sex reversal in frogs. Unexpectedly, animals originating from urban habitats had higher sex-reversal and corticosterone-release rates, reduced body mass and development speed, and lower survival compared to individuals collected from woodland habitats. Thus, anthropogenic environments may affect both sex and fitness, and the underlying mechanisms may vary across ectothermic vertebrates.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jez.2772","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139058405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of antioxidant, antityrosinase, and anticancer activity of mucus extract from both Egyptian land snails, Eremina desertorum and Helix aspersa, with emphasis on their chemical profiles 评估埃及陆地蜗牛 Eremina desertorum 和 Helix aspersa 黏液提取物的抗氧化、抗酪氨酸酶和抗癌活性，重点关注其化学特征。

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-28 DOI: 10.1002/jez.2773

Manar A. Kandeil, Mahy M. Mona

{"title":"Evaluation of antioxidant, antityrosinase, and anticancer activity of mucus extract from both Egyptian land snails, Eremina desertorum and Helix aspersa, with emphasis on their chemical profiles","authors":"Manar A. Kandeil, Mahy M. Mona","doi":"10.1002/jez.2773","DOIUrl":"10.1002/jez.2773","url":null,"abstract":"The snail mucus provides several functions and is increasingly being exploited for medicinal and cosmetic purposes. This study aimed to determine the chemical profile of two snail mucus extracts: the garden snail (Helix aspersa) and the desert snail (Eremina desertorum). In addition, it elucidates the antityrosinase, antioxidant, and anticancer activities against the human cancer cell line epithelioid carcinoma (Hela). The mucus was extracted from the pedal glands of garden snails (H. aspersa) and desert snails (E. desertorum). 2,2-Diphenyl-1-picrylhydrazyl assay and the content of catalase, glutathione-S-transferase, superoxide dismutase, and reduced glutathione were utilized to assess the antioxidative screening activity of the mucus extracts. Besides a tyrosinase inhibitor assay, anticancer activity on cervical cancer cells (Hela) was studied. Additionally, the two mucus samples' total protein, total lipid, fatty acid, and amino acid profiles were compared. The mucus from both snails exhibited antioxidant activity. E. desertorum is more effective in inhibiting tyrosinase activity and has better scavenging activity than H. aspersa mucus extract. Both extracts revealed inhibitory activity against Hela cells, with insignificant differences. Moreover, the results indicated higher protein, lipids, and fatty acids mucus content of E. desertorum extract than those of H. aspersa mucus extract. Both snail slimes' obtained different biological activities, and amino acid contents could be related to their specific functions and beneficial for medical applications, especially antihyperpigmentation.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139058406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diapause-induced shift in the content of major carbohydrates in Chilo partellus (Swinhoe) Diapause 引起的 Chilo partellus (Swinhoe) 主要碳水化合物含量的变化。

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-27 DOI: 10.1002/jez.2774

Ashok K. Sau, Mukesh K. Dhillon, Aditya K. Tanwar

{"title":"Diapause-induced shift in the content of major carbohydrates in Chilo partellus (Swinhoe)","authors":"Ashok K. Sau, Mukesh K. Dhillon, Aditya K. Tanwar","doi":"10.1002/jez.2774","DOIUrl":"10.1002/jez.2774","url":null,"abstract":"Although several aspects like diapause determining factors, population structure, reproductive physiology, and genetics of diapause have been investigated, there is no clarity on carbohydrate energetics during larval diapause in Chilo partellus (Swinhoe). Present studies revealed significant variation between the nondiapausing and diapausing C. partellus for total carbohydrates, glycogen, sorbitol, and trehalose contents in different body parts, life stages, and for body parts × life stages interaction. Total carbohydrate content started declining, while sorbitol and trehalose increased in all the body parts as the C. partellus larvae progressed from prediapausing to diapausing state. However, glycogen content spiked in all the body parts at prediapausing stage, which then declined during diapause. Among the body parts, total carbohydrate content was significantly greater in the hemolymph as compared to other body parts of both larvae and pupae of C. partellus. Glycogen content was significantly greater in the larval fat bodies and pupal hemolymph as compared to their other body parts. In diapausing larvae, sorbitol and trehalose were greater in the integument than in other body parts. Furthermore, there was spike in trehalose and decrease in sorbitol in all the body parts of pupae from diapausing than those from nondiapausing larvae. These findings suggest that the diapause alterate and/or fluctuate major carbohydrates in different body parts of both larvae and pupae of C. partellus. This information will be helpful in better understanding the diapause energetics and overwintering metabolic cryoprotection in insects.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139040079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Symphyseal morphology and jaw muscle recruitment levels during mastication in musteloid carnivorans 偲类食肉动物咀嚼时的先端骨形态和颌骨肌肉募集水平。

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-27 DOI: 10.1002/jez.2771

Jillian Summer Davis, Stephane J. Montuelle, Susan H. Williams

{"title":"Symphyseal morphology and jaw muscle recruitment levels during mastication in musteloid carnivorans","authors":"Jillian Summer Davis, Stephane J. Montuelle, Susan H. Williams","doi":"10.1002/jez.2771","DOIUrl":"10.1002/jez.2771","url":null,"abstract":"In studies of mammalian mastication, a possible relationship has been proposed between bilateral recruitment of jaw adductor muscle force during unilateral chewing and the degree of fusion of the mandibular symphysis. Specifically, species that have unfused, mobile mandibular symphyses tend to utilize lower levels of jaw adductor force on the balancing (nonchewing) than the working (chewing) side of the head, when compared to related species with fused symphyses. Here, we compare jaw adductor recruitment levels in two species of musteloid carnivoran: the carnivorous ferret (unfused symphysis), and the frugivorous kinkajou (fused symphysis). During forceful chewing, we observe that ferrets recruit far more working-side muscle force than kinkajous, regardless of food toughness and that high working-to-balancing side ratios are the result of increased working-side force, often coupled with reduced balancing-side force. We propose that in carnivorans, high working-to-balancing side force ratios coupled with an unfused mandibular symphysis are necessary to rotate the hemimandible for precise unilateral occlusion of the carnassial teeth and to sustain laterally oriented force on the jaw to engage the carnassial teeth during shearing of tough foods. In contrast, the kinkajou's flattened cheekteeth permit less precise occlusion and require medially-oriented forces for grinding, thus, a fused symphysis is mechanically beneficial.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jez.2771","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139040080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Central regulation of reproduction in amphibians 两栖动物繁殖的中枢调控

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-12 DOI: 10.1002/jez.2769

Itaru Hasunuma

{"title":"Central regulation of reproduction in amphibians","authors":"Itaru Hasunuma","doi":"10.1002/jez.2769","DOIUrl":"10.1002/jez.2769","url":null,"abstract":"This review article includes a literature review of synteny analysis of the amphibian gonadotropin-releasing hormone (GnRH) genes, the distribution of GnRH 1 and GnRH2 neurons in the central nervous system of amphibians, the function and regulation of hypophysiotropic GnRH1, and the function of GnRH1 in amphibian reproductive behaviors. It is generally accepted that GnRH is the key regulator of the hypothalamic–pituitary–gonadal axis. Three independent GnRH genes, GnRH1, GnRH2, and GnRH3, have been identified in vertebrates. Previous genome synteny analyses suggest that there are likely just two genes, gnrh1 and gnrh2, in amphibians. In three groups of amphibians: Anura, Urodela, and Gymnophiona, the distributions of GnRH1 and GnRH2 neurons in the central nervous system have also been previously reported. Moreover, these neuronal networks were determined to be structurally independent in all species examined. The somata of GnRH1 neurons are located in the terminal nerve, medial septum (MS), and preoptic area (POA), and some GnRH1 neurons in the MS and POA project into the median eminence. In contrast, the somata of GnRH2 neurons are located in the midbrain tegmentum. In amphibians, GnRH1 neurons originate from the embryonic olfactory placode, while GnRH2 neurons originate from the midbrain. The characterization and feedback regulation mechanisms of hypophysiotropic GnRH1 neurons in amphibians, the involvement of GnRH1 in amphibian reproductive behavior, and its possible mechanism of action should be elucidated in future.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138687119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tongue microarchitecture and functional characterization of the lingual papillae in the desert hedgehog (Paraechinus aethiopicus) 沙漠刺猬（Paraechinus aethiopicus）舌头的微观结构和舌乳头的功能特征

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-11 DOI: 10.1002/jez.2770

Diaa Massoud, Mervat A. AbdRabou, Maged Fouda, Fayez Shaldoum, Barakat M. Alrashdi, Mousa O. Germoush, Haifa E. Alfassam, Aljohara M. Al- Otaibi, Soha A. Soliman, Hanan H. Abd-Elhafeez, Mervat Hassan, Ayman M. Mahmoud

{"title":"Tongue microarchitecture and functional characterization of the lingual papillae in the desert hedgehog (Paraechinus aethiopicus)","authors":"Diaa Massoud, Mervat A. AbdRabou, Maged Fouda, Fayez Shaldoum, Barakat M. Alrashdi, Mousa O. Germoush, Haifa E. Alfassam, Aljohara M. Al- Otaibi, Soha A. Soliman, Hanan H. Abd-Elhafeez, Mervat Hassan, Ayman M. Mahmoud","doi":"10.1002/jez.2770","DOIUrl":"10.1002/jez.2770","url":null,"abstract":"The present work attempted to provide a comprehensive description of the morphoanatomical, histological, and ultrastructural characteristics of the tongue in the desert hedgehog (Paraechinus aethiopicus), and to correlate lingual modifications to the feeding lifestyle. Five adult male hedgehogs were utilized in our investigation. The macroscopic observations revealed elongated, with a moderately pointed apex, tongue and the tongue dorsum lacks both lingual prominence and median sulcus. The main subdivisions of the tongue are radix linguae (root), corpus linguae (body), and apex linguae (apex). The tongue dorsum carries two types of mechanical (conical and filiform) and gustatory (fungiform and circumvallate) papillae. The lingual apex is characterized by the existence of a unique encapsulated muscular structure. Additionally, the lingual glands were interposed between the muscular strands and no lingual glands were detected on the lingual apex. The dorsal surface of the lingual apex exhibited the highest level of keratinization as revealed by histochemical staining while the root showed moderate staining. The topography of the tongue was investigated by scanning electron microscopy (SEM). The obtained results are important to provide basic knowledge that can contribute to better understanding of the nourishment, feeding habits and behavior in this species. Furthermore, the addition of the newly investigated species may help us to determine the evolutionary relationships among species.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138633257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal 非洲侏儒鼠的激素谱，一种具有XY雌性性别反转的物种。

IF 2.8 3区生物学

Journal of experimental zoology. Part A, Ecological and integrative physiology Pub Date : 2023-12-07 DOI: 10.1002/jez.2767

Frederic Veyrunes, Julie Perez, Louise D. Heitzmann, Paul A. Saunders, Laurent Givalois

{"title":"Hormone profiles of the African pygmy mouse Mus minutoides, a species with XY female sex reversal","authors":"Frederic Veyrunes, Julie Perez, Louise D. Heitzmann, Paul A. Saunders, Laurent Givalois","doi":"10.1002/jez.2767","DOIUrl":"10.1002/jez.2767","url":null,"abstract":"In mammals, most sex differences in phenotype are controlled by gonadal hormones, but recent work on transgenic mice has shown that sex chromosomes can have a direct influence on sex-specific behaviors. In this study, we take advantage of the naturally occurring sex reversal in a mouse species, Mus minutoides, to investigate for the first time the relationship between sex chromosomes, hormones, and behaviors in a wild species. In this model, a feminizing variant of the X chromosome, named X*, produces three types of females with different sex chromosome complements (XX, XX*, and X*Y), associated with alternative behavioral phenotypes, while all males are XY. We thus compared the levels of three major circulating steroid hormones (testosterone, corticosterone, and estradiol) in the four sex genotypes to disentangle the influence of sex chromosomes and sex hormones on behavior. First, we did not find any difference in testosterone levels in the three female genotypes, although X*Y females are notoriously more aggressive. Second, in agreement with their lower anxiety-related behaviors, X*Y females and XY males display lower baseline corticosterone concentration than XX and XX* females. Instead of a direct hormonal influence, this result rather suggests that sex chromosomes may have an impact on the baseline corticosterone level, which in turn may influence behaviors. Third, estradiol concentrations do not explain the enhanced reproductive performance and maternal care behavior of the X*Y females compared to the XX and XX* females. Overall, this study highlights that most of the behaviors varying along with sex chromosome complement of this species are more likely driven by genetic factors rather than steroid hormone concentrations.","PeriodicalId":15711,"journal":{"name":"Journal of experimental zoology. Part A, Ecological and integrative physiology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jez.2767","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138498554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0