Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10341
C. Rauque, Alejandro Hidalgo, Patricio R. De los Ríos-Escalante
Despite their ecological importance, research on symbionts of amphipods has been limited in South America. The present study provides a comprehensive overview of symbiont organisms in the freshwater amphipods of the genus Hyalella in South America. Our findings reveal various taxa such as Apicomplexa, Microspora, Peritrichia, Folliculinidae, trematodes, nematodes, cestodes and acanthocephalans, often involving complex life cycles. Studies on symbionts have been done almost exclusively in Argentinean Patagonia. The present overview allows us to know the species that use amphipods, to elucidate their lifecycles and to know their occurrence values.
{"title":"Checklist of symbionts in Hyalella (Amphipoda, Hyalellidae) from South America","authors":"C. Rauque, Alejandro Hidalgo, Patricio R. De los Ríos-Escalante","doi":"10.1163/15685403-bja10341","DOIUrl":"https://doi.org/10.1163/15685403-bja10341","url":null,"abstract":"\u0000Despite their ecological importance, research on symbionts of amphipods has been limited in South America. The present study provides a comprehensive overview of symbiont organisms in the freshwater amphipods of the genus Hyalella in South America. Our findings reveal various taxa such as Apicomplexa, Microspora, Peritrichia, Folliculinidae, trematodes, nematodes, cestodes and acanthocephalans, often involving complex life cycles. Studies on symbionts have been done almost exclusively in Argentinean Patagonia. The present overview allows us to know the species that use amphipods, to elucidate their lifecycles and to know their occurrence values.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10354
S. W. Sintondji, Z. Sohou, Katrijn Baetens, Geneviève Lacroix, E. Fiogbe
The aim of this work was to characterize the growth and reproduction dynamics of shrimp in the Lac Nokoué-Chenal de Cotonou complex. The results of one year’s sampling from five stations (North, South, East, Central and West) of the lagoon complex revealed that linear growth in size in Lake Nokoué is decreasing over time in Macrobrachium macrobrachion (the most representative species of the genus Macrobrachium), but positive in Penaeus notialis (the most representative species of the genus Penaeus). Size-weight relationships indicate that the lowest growth coefficient () is obtained in immature males of Macrobrachium felicinum, while the highest growth coefficient () is obtained in mature females of Macrobrachium vollenhovenii, with an average of 2.84 for all shrimp species over both sexes considered. The test indicated that only the species Macrobrachium vollenhovenii has a significant sexual imbalance in favour of females in Lake Nokoué. Fisher’s Least Significant Difference test indicated that the estimated first sexual maturity sizes in Macrobrachium vollenhovenii and M. macrobrachion are significantly different from those estimated in M. felicinum at the threshold. However, the same test indicates that there is not enough evidence to differentiate the sizes of first sexual maturation in M. vollenhovenii and M. macrobrachion. This work revealed that Penaeus monodon was the only species to show better positive growth within all its groups in Lake Nokoué while exposed to anthropogenic effects. A gradual average increase in the size of Penaeus notialis in Lake Nokoué is found between the beginning and end of the saline intrusion (which confirms the life cycle of the species presented). Species of the genus Macrobrachium showed good reproductive capacity, with the absence of sexually mature Penaeus in this lagoon.
这项工作的目的是描述诺库埃湖-科托努港对虾的生长和繁殖动态。在泻湖综合体的五个站点（北、南、东、中和西）进行的一年采样结果显示，诺库埃湖中的大鳞鲃（大鳞鲃属中最具代表性的物种）的体型线性增长随时间推移而减小，但鲮鱼（鲮鱼属中最具代表性的物种）的体型线性增长为正值。尺寸-重量关系表明，未成熟的雄性大鳞鲃的生长系数（）最低，而成熟的雌性大鳞鲃的生长系数（）最高，所有雌雄对虾的平均生长系数为 2.84。该测试表明，在诺库埃湖，只有雌性鳙鱼的性别失衡现象明显。费雪最小显著差异检验表明，Macrobrachium vollenhovenii 和 M. macrobrachion 的估计初次性成熟尺寸与 M. felicinum 的估计临界值有显著差异。然而，同样的测试表明，没有足够的证据来区分伏牛鲍和大brachion的初次性成熟大小。这项工作表明，在诺奎湖中，单脊东方鲷是所有组别中唯一在人为影响下表现出较好的正增长的物种。在盐碱入侵开始和结束期间，诺库埃湖中的黑线鲈平均体型逐渐增大（这证实了该物种的生命周期）。大鳞鲈属物种显示出良好的繁殖能力，但在该泻湖中没有性成熟的大鳞鲈。
{"title":"Growth and reproduction of the shrimp population in a lagoon system in southern Benin (West Africa)","authors":"S. W. Sintondji, Z. Sohou, Katrijn Baetens, Geneviève Lacroix, E. Fiogbe","doi":"10.1163/15685403-bja10354","DOIUrl":"https://doi.org/10.1163/15685403-bja10354","url":null,"abstract":"\u0000The aim of this work was to characterize the growth and reproduction dynamics of shrimp in the Lac Nokoué-Chenal de Cotonou complex. The results of one year’s sampling from five stations (North, South, East, Central and West) of the lagoon complex revealed that linear growth in size in Lake Nokoué is decreasing over time in Macrobrachium macrobrachion (the most representative species of the genus Macrobrachium), but positive in Penaeus notialis (the most representative species of the genus Penaeus). Size-weight relationships indicate that the lowest growth coefficient () is obtained in immature males of Macrobrachium felicinum, while the highest growth coefficient () is obtained in mature females of Macrobrachium vollenhovenii, with an average of 2.84 for all shrimp species over both sexes considered. The test indicated that only the species Macrobrachium vollenhovenii has a significant sexual imbalance in favour of females in Lake Nokoué. Fisher’s Least Significant Difference test indicated that the estimated first sexual maturity sizes in Macrobrachium vollenhovenii and M. macrobrachion are significantly different from those estimated in M. felicinum at the threshold. However, the same test indicates that there is not enough evidence to differentiate the sizes of first sexual maturation in M. vollenhovenii and M. macrobrachion. This work revealed that Penaeus monodon was the only species to show better positive growth within all its groups in Lake Nokoué while exposed to anthropogenic effects. A gradual average increase in the size of Penaeus notialis in Lake Nokoué is found between the beginning and end of the saline intrusion (which confirms the life cycle of the species presented). Species of the genus Macrobrachium showed good reproductive capacity, with the absence of sexually mature Penaeus in this lagoon.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140411257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10329
Patricio R. De los Ríos-Escalante, Pedro Jara-Seguel, Á. Contreras, Exequiel R. Gonzalez
The amphipods of the genus Hyalella have many endemic species throughout South America, and these may have poorly studied associated species as epibionts. The aim of the present study was to review the literature on the presence of the protozoon Lagenophrys lenticulata (Kellicott, 1885) on species of Hyalella and contrast the results with the geographical distribution of the reported hosts. The literature records the presence of L. lenticulata on populations of H. azteca from Canada, Mexico and the United States of America, and on populations of H. curvispina from Uruguay. The literature also reports that H. curvispina is widespread throughout southern South America, including Argentina and Chile, and that it would be possible to find the presence of epibionts on other populations of H. curvispina. The corresponding biogeographical and evolutionary topics are discussed.
片脚类动物(Hyalella)属在整个南美洲有许多特有物种，这些物种可能有研究较少的相关附生物种。本研究的目的是回顾有关原生动物 Lagenophrys lenticulata（Kellicott，1885 年）存在于 Hyalella 种类上的文献，并将研究结果与报告的宿主地理分布进行对比。据文献记载，加拿大、墨西哥和美国的 H. azteca 种群以及乌拉圭的 H. curvispina 种群上都存在 L. lenticulata。文献还报告说，卷曲卷尾草广泛分布于包括阿根廷和智利在内的南美洲南部，有可能在卷曲卷尾草的其他种群上发现附翅虫。本文讨论了相应的生物地理学和进化课题。
{"title":"On the presence of the epibiont (ectosymbiont) Lagenophrys lenticulata (Kellicott, 1885) (Ciliophora) on Hyalella cursvispina Schoemaker, 1942: is it possible to find it on Chilean Hyalella populations?","authors":"Patricio R. De los Ríos-Escalante, Pedro Jara-Seguel, Á. Contreras, Exequiel R. Gonzalez","doi":"10.1163/15685403-bja10329","DOIUrl":"https://doi.org/10.1163/15685403-bja10329","url":null,"abstract":"\u0000The amphipods of the genus Hyalella have many endemic species throughout South America, and these may have poorly studied associated species as epibionts. The aim of the present study was to review the literature on the presence of the protozoon Lagenophrys lenticulata (Kellicott, 1885) on species of Hyalella and contrast the results with the geographical distribution of the reported hosts. The literature records the presence of L. lenticulata on populations of H. azteca from Canada, Mexico and the United States of America, and on populations of H. curvispina from Uruguay. The literature also reports that H. curvispina is widespread throughout southern South America, including Argentina and Chile, and that it would be possible to find the presence of epibionts on other populations of H. curvispina. The corresponding biogeographical and evolutionary topics are discussed.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10367
Övgü Gencer
Reductions in the size of mature blue crabs, Callinectes sapidus, which are commercially harvested, are of concern to the aquaculture industry. Through their role in the production of viable offspring, aquaculturists focus their attention in particular on female crabs, although the phenomenon will, of course, also affect the males. Meanwhile, decreases in size at maturity throughout the crab population may be the result of temperature alterations, at present also due to global climate change. Temperature-based shifts in growth can lead to changes in reproductive efficiency, as well as in size and age at maturity. In this study, the effects of temperature on the moulting frequency of blue crabs were investigated and survival rates have been calculated. The purpose of this study was to investigate the temperature dependence of survival and of the moulting processes for blue crab larvae, and to determine the effect of increasing temperature on moulting. The stages from zoea-1 to zoea-5 were examined at 16, 22, 26 and 30°C. The results show that there is a significant difference in growth and moulting, depending on the rearing temperature. As the temperature increases, the interval between moulting days can be seen to be shortened, and increasingly so with the progress in the growth of the crabs. Moulting-interval days became less with the growth of the crabs. The effect of a rise in temperature on growth per moult is also significant, and along the temperature range tested the optimum temperature was found to be 26°C. A reduction in the length of the intermoult period was observed from the lowest to the optimum temperature, while a sudden, sharp increase in the intermoult period above 26°C was observed as well.
{"title":"The impact of an abiotic variable, temperature, on larvae of the blue crab, Callinectes sapidus Rathbun, 1896 (Brachyura, Portunidae)","authors":"Övgü Gencer","doi":"10.1163/15685403-bja10367","DOIUrl":"https://doi.org/10.1163/15685403-bja10367","url":null,"abstract":"\u0000Reductions in the size of mature blue crabs, Callinectes sapidus, which are commercially harvested, are of concern to the aquaculture industry. Through their role in the production of viable offspring, aquaculturists focus their attention in particular on female crabs, although the phenomenon will, of course, also affect the males. Meanwhile, decreases in size at maturity throughout the crab population may be the result of temperature alterations, at present also due to global climate change. Temperature-based shifts in growth can lead to changes in reproductive efficiency, as well as in size and age at maturity. In this study, the effects of temperature on the moulting frequency of blue crabs were investigated and survival rates have been calculated. The purpose of this study was to investigate the temperature dependence of survival and of the moulting processes for blue crab larvae, and to determine the effect of increasing temperature on moulting. The stages from zoea-1 to zoea-5 were examined at 16, 22, 26 and 30°C. The results show that there is a significant difference in growth and moulting, depending on the rearing temperature. As the temperature increases, the interval between moulting days can be seen to be shortened, and increasingly so with the progress in the growth of the crabs. Moulting-interval days became less with the growth of the crabs. The effect of a rise in temperature on growth per moult is also significant, and along the temperature range tested the optimum temperature was found to be 26°C. A reduction in the length of the intermoult period was observed from the lowest to the optimum temperature, while a sudden, sharp increase in the intermoult period above 26°C was observed as well.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10351
José A. Gónzalez, R. Triay-Portella, J. M. Lorenzo, José G. Pajuelo, Iñaki Gaztañaga, Sandra Correia, C. Monteiro, A. Martins, Anísio Évora, Maria A. Correia
Sustainable fishing technology for shrimp in Cape Verde’s semi-deep waters. A 20-year cooperative journey: from surveying to sustainable exploitation of a virgin resource.
佛得角半深水域对虾的可持续捕捞技术。20 年的合作历程：从勘测到可持续开发原始资源。
{"title":"Sustainable fishing technology for shrimp in Cape Verde’s semi-deep waters – A 20-year cooperative journey: from surveying to sustainable exploitation of a virgin resource","authors":"José A. Gónzalez, R. Triay-Portella, J. M. Lorenzo, José G. Pajuelo, Iñaki Gaztañaga, Sandra Correia, C. Monteiro, A. Martins, Anísio Évora, Maria A. Correia","doi":"10.1163/15685403-bja10351","DOIUrl":"https://doi.org/10.1163/15685403-bja10351","url":null,"abstract":"\u0000Sustainable fishing technology for shrimp in Cape Verde’s semi-deep waters. A 20-year cooperative journey: from surveying to sustainable exploitation of a virgin resource.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10353
K. Izawa
Cirracanthus monacanthi (Yamaguti, 1939) and Taeniacanthus balistae (Claus, 1864) are redescribed based on specimens recovered from Stephanolepis cirrhifer (Temminck & Schlegel, 1850) and Aluterus monoceros (Linnaeus, 1758) (Tetraodontiformes, Monacanthidae), respectively, in Japan. The description of the copepodid V female of T. balistae is the first time for the species.
{"title":"Redescription of two known species of Taeniacanthidae (Copepoda, Cyclopoida) parasitic on Japanese filefishes (Actinopterygii)","authors":"K. Izawa","doi":"10.1163/15685403-bja10353","DOIUrl":"https://doi.org/10.1163/15685403-bja10353","url":null,"abstract":"\u0000Cirracanthus monacanthi (Yamaguti, 1939) and Taeniacanthus balistae (Claus, 1864) are redescribed based on specimens recovered from Stephanolepis cirrhifer (Temminck & Schlegel, 1850) and Aluterus monoceros (Linnaeus, 1758) (Tetraodontiformes, Monacanthidae), respectively, in Japan. The description of the copepodid V female of T. balistae is the first time for the species.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10352
K. Izawa
Biacanthus pleuronichthydis (Yamaguti, 1939) is redescribed based on specimens of the female, recovered from the body surface of the bastard halibut, Paralichthys olivaceus (Temminck & Schlegel, 1846) (Pleuronectiformes, Paralichthyidae), which is a new host for the species.
{"title":"Redescription of Biacanthus pleuronichthydis (Yamaguti, 1939) (Copepoda, Cyclopoida, Taeniacanthidae), recovered from Paralichthys olivaceus (Temminck & Schlegel, 1846) (Actinopterygii) in Japan","authors":"K. Izawa","doi":"10.1163/15685403-bja10352","DOIUrl":"https://doi.org/10.1163/15685403-bja10352","url":null,"abstract":"\u0000Biacanthus pleuronichthydis (Yamaguti, 1939) is redescribed based on specimens of the female, recovered from the body surface of the bastard halibut, Paralichthys olivaceus (Temminck & Schlegel, 1846) (Pleuronectiformes, Paralichthyidae), which is a new host for the species.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10363
Gamze Turan, Andrezza Carvalho Chagas, César SB Costa, Wilson WASIELESKY Jr., Luís H. da Silva Poersch
In a closed, or zero water exchange, greenhouse aquaculture system, this study examined the interaction between the aggregation flocs in the mono- and co-cultivation of Pasific white shrimp, Litopenaeus vannamei (300 individuals/m3) with macroalgae, Ulva lactuca f. fasciata at different densities of Ulva (1, 2 and 3 g/l). The investigation was conducted under zero water exchange conditions. The accumulated flocs were compared between the various treatment groups: without Ulva (Treatment Control Group), Ulva at 1 g/l density (T1: Treatment 1), Ulva at 2 g/l (T2: Treatment 2), and Ulva at 3 g/l (T3: Treatment 3). Ultimately, it was determined that Ulva cultivation using the Biofloc system actually helped to ensure the water quality in the zero water exchange culture system during the 35-day experimental period with reduced cyanophyte densities, that can cause toxic algal blooms in aquaculture systems. This was interpreted to result from the fact that Ulva is a naturally occurring bioremediation agent.
{"title":"Impact of the co-cultivation of macroalgae (Ulva lactuca f. fasciata) on the composition of biofloc in a zero water exchange system used for rearing Pacific white shrimp (Litopenaeus vannamei) (Decapoda, Dendrobranchiata)","authors":"Gamze Turan, Andrezza Carvalho Chagas, César SB Costa, Wilson WASIELESKY Jr., Luís H. da Silva Poersch","doi":"10.1163/15685403-bja10363","DOIUrl":"https://doi.org/10.1163/15685403-bja10363","url":null,"abstract":"\u0000In a closed, or zero water exchange, greenhouse aquaculture system, this study examined the interaction between the aggregation flocs in the mono- and co-cultivation of Pasific white shrimp, Litopenaeus vannamei (300 individuals/m3) with macroalgae, Ulva lactuca f. fasciata at different densities of Ulva (1, 2 and 3 g/l). The investigation was conducted under zero water exchange conditions. The accumulated flocs were compared between the various treatment groups: without Ulva (Treatment Control Group), Ulva at 1 g/l density (T1: Treatment 1), Ulva at 2 g/l (T2: Treatment 2), and Ulva at 3 g/l (T3: Treatment 3). Ultimately, it was determined that Ulva cultivation using the Biofloc system actually helped to ensure the water quality in the zero water exchange culture system during the 35-day experimental period with reduced cyanophyte densities, that can cause toxic algal blooms in aquaculture systems. This was interpreted to result from the fact that Ulva is a naturally occurring bioremediation agent.","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140415281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10345
Denis Zavarzin, E. Suárez-Morales
{"title":"First record of Caromiobenella helgolandica (Claus, 1863) (Copepoda, Monstrilloida, Monstrillidae) from the Okhotsk Sea","authors":"Denis Zavarzin, E. Suárez-Morales","doi":"10.1163/15685403-bja10345","DOIUrl":"https://doi.org/10.1163/15685403-bja10345","url":null,"abstract":"","PeriodicalId":10834,"journal":{"name":"Crustaceana","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140411875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-29DOI: 10.1163/15685403-bja10356
Nishita Lal, Anilkumar Gopinathan
The phylogeny of field crabs has been under profuse discussion for several decades. At this juncture, this paper reassesses the “decades old” phylogenetic status of an edible field crab, hitherto referred to as Paratelphusa hydrodromous, inhabiting the paddy fields of Chelari village (Kerala, India). After Alcock’s (1910) description, there has hardly been any serious attempt at ascertaining its precise taxonomic status. Through an integrated approach, using parsimony analysis and molecular methods, the present study reveals the candidate form’s (species’) closer affinity to the genus Oziotelphusa. Comparison of morphological and molecular characteristics with its closest phylogenetic neighbours (O. biloba, O. wagrakarowensis, O. kerala and O. aurantia) has shown that the candidate form is a taxonomically distinct entity, qualified to be considered as an unreported species; its suggested revised nomenclature is Oziotelphusa chelarensis, reminiscent of the village Chelari. Further, the paper views the relevance of this taxonomic study from conservational angles as well.
几十年来，人们一直在对田蟹的系统发育进行深入讨论。在此关头，本文重新评估了栖息在切拉里村（印度喀拉拉邦）稻田中的一种食用田蟹的 "几十年前 "的系统发育状况，这种田蟹迄今被称为 Paratelphusa hydrodromous。在阿尔科克（1910 年）的描述之后，几乎没有人认真尝试过确定其确切的分类地位。通过综合使用解析分析和分子方法，本研究揭示了候选形式（物种）与 Oziotelphusa 属更近的亲缘关系。biloba, O. wagrakarowensis, O. kerala and O. aurantia）的形态学和分子特征进行比较，结果表明候选形式在分类学上是一个独特的实体，有资格被视为一个未报告的物种；其建议的修订命名法为 Oziotelphusa chelarensis，让人联想到村庄 Chelari。此外，本文还从保护角度探讨了这一分类研究的意义。
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