Annales De Limnologie-international Journal of Limnology最新文献_第5页

Study of morphotypes and life history of six clones of Lecane bulla (Gosse, 1851) from Quintana Roo, Mexico 墨西哥金塔纳罗奥(Quintana Roo, Mexico, Gosse, 1851) 6个leane bulla无性系的形态型和生活史研究

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/LIMN/2021006

J. Arroyo-Castro, R. Rico-Martínez, Jesús Alvarado-Flores

{"title":"Study of morphotypes and life history of six clones of Lecane bulla (Gosse, 1851) from Quintana Roo, Mexico","authors":"J. Arroyo-Castro, R. Rico-Martínez, Jesús Alvarado-Flores","doi":"10.1051/LIMN/2021006","DOIUrl":"https://doi.org/10.1051/LIMN/2021006","url":null,"abstract":"The genus Lecane is highly diverse, there are 209 species, most of which inhabits tropical aquatic systems. In Quintana Roo 42 species have been reported, one of these is Lecane bulla described at the widest distribution throughout the Yucatan peninsula however; their morphotypes and demographic features are unknown. Therefore, the objective of this work was identify the presence of morphotypes L. bulla and their life history traits. We evaluated life history and morphometric data of females and asexual and sexual eggs from the populations were established from clonal strains, which remained in laboratory conditions for 6 months. They were kept in a bioclimatic chamber with photoperiod of 12 hours of light and 12 hours darkness, at a 25 ± 2 °C, and were feeding with the green algae Nannochloropsis oculata at 1 × 106 cell/ml. Thirty-four clonal strains from six locations were analyzed. Statistical analysis determined significant differences between morphometric measurements (p < 0.001) in the six localities as well as showed statistically significant differences in all demographic parameters. In conclusion, this study indicates the possible coexistence in the same geographical area of two different morphotypes of L. bulla, one is a small-sized distributed in the northwest of Quintana Roo and another large-sized in the southwest.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"12 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90422015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phytoplankton dynamics in a seasonal stratified reservoir (Tillari), Western India 印度西部季节性分层水库(Tillari)中的浮游植物动态

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/limn/2021018

Ayaz Ahmed, M. Gauns, D. Shenoy, S. Kurian, H. Naik, S. Naqvi

{"title":"Phytoplankton dynamics in a seasonal stratified reservoir (Tillari), Western India","authors":"Ayaz Ahmed, M. Gauns, D. Shenoy, S. Kurian, H. Naik, S. Naqvi","doi":"10.1051/limn/2021018","DOIUrl":"https://doi.org/10.1051/limn/2021018","url":null,"abstract":"Phytoplankton are the primary producers in all the aquatic ecosystems and play an important role in key biogeochemical processes that are linked to the higher trophic levels and climate variability. The present study deals with the phytoplankton dynamics, biomass and physicochemical features in freshwater reservoir, Tillari, western India. The reservoir experience seasonal stratification and mixing associated changes in the biogeochemical aspects especially the phytoplankton community and chlorophyll a (hereafter, Chl a). The influence of seasonality was lesser in the deeper water in the reservoir. Buildup in phytoplankton biomass (up to 6.6 mg m−3) was observed in the upper strata of the water column (epilimnion) during the monsoon period (June–July) and winter (December) as a result of nutrient enrichment from the hypolimnion. Among nutrients, nitrate was associated with buildup of Chl a in the epilimnion during summer (r2 = 0.7). A total of 91 phytoplankton species were identified with major contribution by charophytes and chlorophytes. The dominant phytoplankton species belonged to genera Staurastrum, Cosmarium, Aulacoseira, Nephrocytium and Shroederia. Charophytes made a remarkable presence during the whole study period in the well oxygenated epilimnion as well as in the hypolimnion with relatively low oxygen. Diatom, the major silica sinking group was relatively less abundant. Keeping the importance of the reservoir in view, the understanding of phytoplankton community from this poorly explored reservoir with respect to influencing factors is a very vital baseline information. Thus, to design and evaluate the management strategies for the reservoir, continuous monitoring and processes studies is warranted.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"25 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86756538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Survival strategies of phytoplankton functional groups to environmental factors in a drinking water reservoir, central China 饮用水库浮游植物功能群对环境因子的生存策略

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/limn/2021016

Guojia Huang, Xiaoqing Wang, Yushun Chen, Longhui Deng, Dajian Xu

{"title":"Survival strategies of phytoplankton functional groups to environmental factors in a drinking water reservoir, central China","authors":"Guojia Huang, Xiaoqing Wang, Yushun Chen, Longhui Deng, Dajian Xu","doi":"10.1051/limn/2021016","DOIUrl":"https://doi.org/10.1051/limn/2021016","url":null,"abstract":"In this study, use survival strategies of phytoplankton functional groups to environmental factors in a drinking water reservoir. Survival strategies of phytoplankton in drinking water reservoirs were rarely analysed. Dynamics and survival strategies of phytoplankton community in Zhushuqiao Reservoir (Changsha, China) were studied bimonthly from April 2016 to February 2017 to fill this gap. In spring, species of CRS-strategy that adapted to low water temperature, light, and nutrient dominated. There were small individuals of opportunistic colonists of C-strategy observed before stratification. With the increase of nutrient and water temperature in summer, slightly bigger, disturbance-tolerant species of R-strategy and species of CS-strategy that adapted to stratification dominated. In winter, some species adapted to low water temperature, which were R-strategists. Key factors driven seasonal phytoplankton succession were water temperature, total phosphorus, and dissolved inorganic nitrogen. Attention should be paid to potential threats from algal bloom species with C-strategy, and future longer-term monitoring of the system and its surrounding watersheds is greatly needed.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"48 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78719878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Age, growth, and mortality of silver carp Hypophthalmichthys molitrix (Valenciennes, 1844) in the middle and lower reaches of the Pearl River, and implications for management and conservation 珠江中下游鲢鱼(Hypophthalmichthys molitrix, valciennes, 1844)的年龄、生长和死亡率及其管理和保护意义

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/limn/2021019

Shuli Zhu, Zhixin Wu, Yingqiu Zhang, Weitao Chen, Xinhui Li, Yujie He, Jie Li

{"title":"Age, growth, and mortality of silver carp Hypophthalmichthys molitrix (Valenciennes, 1844) in the middle and lower reaches of the Pearl River, and implications for management and conservation","authors":"Shuli Zhu, Zhixin Wu, Yingqiu Zhang, Weitao Chen, Xinhui Li, Yujie He, Jie Li","doi":"10.1051/limn/2021019","DOIUrl":"https://doi.org/10.1051/limn/2021019","url":null,"abstract":"This study aimed to determine the age, growth, mortality, and population structure of the economically important cyprinid silver carp Hypophthalmichthys molitrix (Valenciennes, 1844) in the middle and lower reaches of the Pearl River. A total of 297 silver carp were sampled quarterly from the catches of gillnet fishermen, at six sites, between June 2019 and September 2020. Standard length of the specimens ranged from 130 to 585 mm, and body weight ranged from 45.5 to 3930 g. The length–weight relationship parameter b values reached 3.015. Age was determined through examination and measurements of fish scales, and the age composition of the sampled silver carp varied from 0+ to 4+. Fitting the new data to the von Bertalanffy growth model, we obtained an asymptotic size (L∞) of 1107 mm, k of 0.135, and t0 of −0.666 for silver carp in this stretch of the river. The calculated growth performance index ϕ and estimated longevity tmax were 5.22 and 21.56, respectively. The rates of total mortality, natural mortality, and fishing mortality were calculated as 0.4997, 0.1621, and 0.3377, respectively, while the exploitation ratio was evaluated as 0.6757. The overall results confirm overexploitation of this resource in the middle and lower reaches of the Pearl River. It was concluded that this species should be protected from capture until at least 790 mm in standard length, representing an optimal minimum size for capture to benefit conservation of the species and to sustainably develop this valuable fishery.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"41 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81021359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Impacts of phosphorus loads on the water quality and the proliferation of harmful cyanobacteria in Foum-Gleita Reservoir (Mauritania) 茅利塔尼亚Foum-Gleita水库磷负荷对水质及有害蓝藻繁殖的影响

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/LIMN/2020029

A. S. Sadegh, Z. Sidoumou, M. Dia, J. L. G. Pinchetti, N. Bouaïcha

{"title":"Impacts of phosphorus loads on the water quality and the proliferation of harmful cyanobacteria in Foum-Gleita Reservoir (Mauritania)","authors":"A. S. Sadegh, Z. Sidoumou, M. Dia, J. L. G. Pinchetti, N. Bouaïcha","doi":"10.1051/LIMN/2020029","DOIUrl":"https://doi.org/10.1051/LIMN/2020029","url":null,"abstract":"Excess phosphorus and nitrogen inputs into freshwater ecosystems is one of the main causes of expansion of harmful cyanobacterial blooms worldwide. This work was conducted to study the impacts of phosphorus leaching from the exploitation of phosphate mines present in the watershed of Foum-Gleita Reservoir (Mauritania) on the water quality and its major contribution to the proliferation of harmful cyanobacteria throughout the year. The physicochemical parameters, the occurrence and abundance of phytoplankton (including cyanobacteria), and the microcystins concentration were monitored monthly from September 2017 to August 2018. The relationships between limnological and biological variables were explored by using Pearson's correlation and forward stepwise multiple linear regression (MLR) analysis. Microcystins were detected by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Our results showed that this reservoir can be classified as hypereutrophic throughout the year and that Microcystis aeruginosa (M. aeruginosa) and Dolichospermum flos-aquae (D. flos-aquae) were dominant species during the rainy season (July-September), and only the congener microcystin-LR (MC-LR) was detected with a peak at 3.55 µg L−1. Pearson's correlation and MLR analysis showed that water temperature pH, phosphorus, nitrogen, and iron concentrations were the most important variables accounting for M. aeruginosa and D. flos-aquae abundance and MC-LR concentration. Our study provides new insight into the effects of moderate nitrogen concentrations on phytoplankton community composition with dominance of the cyanobacteria phylum in phosphorus-rich freshwater ecosystems.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"78 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83928889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Effect of environment on functional traits of co-occurring water beetles 环境对共生水甲虫功能性状的影响

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/LIMN/2020030

Sayali D. Sheth, A. Padhye, H. Ghate

{"title":"Effect of environment on functional traits of co-occurring water beetles","authors":"Sayali D. Sheth, A. Padhye, H. Ghate","doi":"10.1051/LIMN/2020030","DOIUrl":"https://doi.org/10.1051/LIMN/2020030","url":null,"abstract":"We investigated trait-environment relationships of co-occurring aquatic Coleoptera specifically true water beetles in anthropogenic ponds from the Western Ghats, India for the first time. Our objectives were to: (1) identify species assemblages; (2) study species traits; (3) study trait-environment relationships of co-occurring species. We analysed 132 samples collected using standardised quantitative method during the years 2016 and 2017. We found 16 significant assemblages using Fager's index, where most of the pairs have body size ratio of 1.3 or more. For example, Laccophilus parvulus and Hydaticus satoi pair has body size ratio of 3.98, and both are predators, indicating that body size is a function of food size. Moreover, factor analysis revealed three major swimming categories of studied beetles, namely fast swimmers, maneuverers and poor swimmers. Further, the RLQ analysis, and combined approach of RLQ and fourth-corner analysis showed that environmental variables affected species traits. For instance, odonate nymphs and submerged vegetation were positively associated with fast swimmers like Laccophilus inefficiens and Hydaticus satoi. The assemblage of congeners Hydroglyphus inconstans and H. flammulatus can be predator-mediated as these beetles showed negative association with odonate nymphs as well as competitive to obtain resource by showing positive association with chironomid larvae. Therefore, the traits studied were important for ecological performances of species in ponds. This study has also highlighted the importance of anthropogenic ponds in the Western Ghats as biodiversity refuges of ecologically unique and evolutionary old major extant lineages of water beetles.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"37 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79131263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Habitat use of the Japanese eel (Anguilla japonica) and marbled eel (Anguilla marmorata) in the large subtropical Pearl River 日本鳗(Anguilla japonica)和大理石纹鳗(Anguilla marmorata)在亚热带珠江的栖息地

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/LIMN/2021001

Fangmin Shuai, Xinhui Li, Wanling Yang, Weitao Chen, S. Lek

{"title":"Habitat use of the Japanese eel (Anguilla japonica) and marbled eel (Anguilla marmorata) in the large subtropical Pearl River","authors":"Fangmin Shuai, Xinhui Li, Wanling Yang, Weitao Chen, S. Lek","doi":"10.1051/LIMN/2021001","DOIUrl":"https://doi.org/10.1051/LIMN/2021001","url":null,"abstract":"Anguilla spp. are catadromous fish and with a high economic value in Asia. The Pearl River is the largest river in southern China and is an important area for wild populations of Anguilla spp. However, until now, there has been little research on the eel's population structure and habitat use in the Pearl River. This study analyzed the population structure and habitat use characteristics of the Japanese eel (Anguilla japonica) and the marbled eel (Anguilla marmorata) in the Pearl River based on data collected from 2015 to 2018. A total of 181 Japanese eels and 56 marbled eels were collected, over half of which were middle-sized eels between 255 and 600 mm in length. Although they are sister species, Japanese eels mainly inhabit complex river habitats characterized by high river fractals and coefficients of fluvial facies, while marbled eels mainly inhabit wider and deeper river sections. The impact of physical environmental factors (such as river fractals, coefficients of fluvial facies and river width) on the distribution of these two species is greater than the impact of small-scale water quality environmental factors (such as DO concentration, temperature and clarity). The results of this study showed that wild Anguilla spp. resources in the Pearl River were extremely low and there was an urgent need for conservation and management of eel resources in south China.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"14 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87846645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effects of ethylene-bis-dithiocarbamate (Mancozeb) on zebrafish (Danio rerio) oocytes 二硫代氨基甲酸乙酯对斑马鱼卵母细胞的影响

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/limn/2021017

Nazan Deniz Yön Ertuğ, Elif Uzun, Tarık Dinç, C. Akbulut

引用次数: 0

The effects of Bentagran on the development and antioxidant parameters of Arthrospira platensis Gomont and Chlorella vulgaris Beyerinck (Beijerinck) Bentagran对平节螺旋藻和小球藻发育及抗氧化参数的影响

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI: 10.1051/LIMN/2021008

Şükrüye Er, H. Tunca, Ali Doǧru, Tuğba Ongun Sevi̇ndi̇k

{"title":"The effects of Bentagran on the development and antioxidant parameters of Arthrospira platensis Gomont and Chlorella vulgaris Beyerinck (Beijerinck)","authors":"Şükrüye Er, H. Tunca, Ali Doǧru, Tuğba Ongun Sevi̇ndi̇k","doi":"10.1051/LIMN/2021008","DOIUrl":"https://doi.org/10.1051/LIMN/2021008","url":null,"abstract":"The aim of the study is to determine the effects of Bentagran on growth and oxidative effects to Chlorella vulgaris and Arthrospira platensis and to evaluate the herbicide toxicity on primary producers of aquatic ecosystems. The decrease in both biomass accumulation and chlorophyll-a content in a dose-dependent manner were observed in both organisms exposed to different Bentagran concentrations (for C. vulgaris 60–960 µg mL−1; for A. platensis 100–800 µg mL−1) during 7 days. SOD activity increases significantly in Chlorella vulgaris and Arthrospira platensis at concentrations of 480 and 200 ug mL−1, respectively. Although there was no significant change in APX (ascorbate peroxidase) activity in C. vulgaris, the APX activity decreased at 400 and 600 µg mL−1 concentrations in A. platensis. While the GR (glutathione reductase) activity increased at 960 µg mL−1 concentration in C. vulgaris, it also showed increases at 100, 200 and 400 μg mL−1 concentrations, but it decreased at 600 µg mL−1 concentration in A. platensis. MDA (malondialdehyde) and proline amounts decreased only at the concentration of 960 µg mL−1, while H2O2 didn't change compared to control. Total MDA, H2O2 (hydrogen peroxide) and proline amounts did not show significant change compared to control. It is found that the effects of Bentagran on growth and antioxidant parameters are diverse at different concentrations and species, and this can be attributed to the different reactive oxygen species (ROS) production ability in these species.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"25 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81382480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of testicular histology and spermatogenesis in the Levantine frog, Pelophylax bedriagae (Amphibia: Anura: Ranidae) 黎凡特蛙，Pelophylax bedriagae睾丸组织学和精子发生的特征(两栖纲:无尾目:蛙科)

IF 1 4区环境科学与生态学

Annales De Limnologie-international Journal of Limnology Pub Date : 2020-01-01 DOI: 10.1051/limn/2020017

E. Akat

{"title":"Characterization of testicular histology and spermatogenesis in the Levantine frog, Pelophylax bedriagae (Amphibia: Anura: Ranidae)","authors":"E. Akat","doi":"10.1051/limn/2020017","DOIUrl":"https://doi.org/10.1051/limn/2020017","url":null,"abstract":"Amphibians occupy a position of great interest in terms of vertebrate evolution. Additionally, amphibians are known as a transitional group between amniotes and anamniotes. However, there are few studies on the gametogenesis of anamniotes vertebrates, especially anurans. Therefore, the purpose of this study was to analyze the histological feature of germ cells and their arrangement in the testis of Levantine frog, Pelophylax bedriagae (Camerano, 1882). Spermatogenic cells were organized in spermatocysts. Each spermatocyst contained cells at the same stage of the spermatogenic cycle. Identification of each cellular type in seminiferous tubule was carried out according to the size and morphology of cells and the degree of nuclear material compaction. Spermatogonia were large cells localized at the base of the seminiferous epithelium. Primary spermatocytes were examined in different phases of first meiotic division and distinguished from other cell types by their dark spherical nuclei or looser chromatin. Two types of spermatids, spherical and elongated cells, were observed. Seminiferous tubules were surrounded by peritubular myoid cells, and they contained no lumen. The lack of lumen in the seminiferous tubules and the cystic spermatogenesis probably provide synchronously production of a large number of sperms. The location of hyaluronic acid was also determined in interstitial tissue between seminiferous tubules to probably provide testicular integrity and viscoelasticity.","PeriodicalId":7903,"journal":{"name":"Annales De Limnologie-international Journal of Limnology","volume":"35 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86955976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3