Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3339
Sebastián Cona, Claudio F. Cornejo, S. Hernández, C. Ibáñez
Sharks of the order Lamniformes are restricted to 15 extant species grouped into 10 genera and 8 families. These species are characterized by two spine-less dorsal fins and a ring-shaped intestinal valve. Their phylogenetic relationships are not congruent among different methods and approaches, such as the use of morphological or molecular data. The present study evaluates the phylogenetic relationships of species of the order Lamniformes by means of phylogenetic reconstructions through Bayesian inference based on morphological and molecular data and using both datasets combined. The consensus tree of the morphological Bayesian reconstruction shows that Lamnidae and Alopiidae are monophyletic, while Odontaspididae is polyphyletic. Eight synapomorphies are detected in Alopiidae, six in Lamnidae, and one for Odontaspididae. In the Bayesian molecular reconstruction consensus tree, Lamnidae and Odontaspididae are monophyletic, and Alopiidae is polyphyletic. In the consensus tree of the Bayesian reconstruction of combined data, Lamnidae, Alopiidae and, Odontaspididae are monophyletic. The results obtained suggest that posterior probabilities increase when using combined characters in a Bayesian phylogenetic analysis, which is greatly advantageous for systematics of the order Lamniformes. Due to the presence of non-monophyletic groups, monotypic families, and the strong support for the division of lamniforms into two clades, a crucial review for the classification of species is needed.
{"title":"Combining morphological and molecular information to infer phylogenetic relationships of lamniform sharks","authors":"Sebastián Cona, Claudio F. Cornejo, S. Hernández, C. Ibáñez","doi":"10.22370/rbmo.2022.57.especial.3339","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3339","url":null,"abstract":"Sharks of the order Lamniformes are restricted to 15 extant species grouped into 10 genera and 8 families. These species are characterized by two spine-less dorsal fins and a ring-shaped intestinal valve. Their phylogenetic relationships are not congruent among different methods and approaches, such as the use of morphological or molecular data. The present study evaluates the phylogenetic relationships of species of the order Lamniformes by means of phylogenetic reconstructions through Bayesian inference based on morphological and molecular data and using both datasets combined. The consensus tree of the morphological Bayesian reconstruction shows that Lamnidae and Alopiidae are monophyletic, while Odontaspididae is polyphyletic. Eight synapomorphies are detected in Alopiidae, six in Lamnidae, and one for Odontaspididae. In the Bayesian molecular reconstruction consensus tree, Lamnidae and Odontaspididae are monophyletic, and Alopiidae is polyphyletic. In the consensus tree of the Bayesian reconstruction of combined data, Lamnidae, Alopiidae and, Odontaspididae are monophyletic. The results obtained suggest that posterior probabilities increase when using combined characters in a Bayesian phylogenetic analysis, which is greatly advantageous for systematics of the order Lamniformes. Due to the presence of non-monophyletic groups, monotypic families, and the strong support for the division of lamniforms into two clades, a crucial review for the classification of species is needed.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129160910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3176
C. Capapé, S. Rafrafi-Nouira, Y. Diatta, Almamy Diaby, C. Reynaud
The capture of four abnormal specimens of the Striped panray, Zanobatus schoenleiniii was reported from shallow coastal waters surrounding the touristic area of Dakar, Republic of Senegal, and among them, some specimens displaying morphological deformities. A specimen exhibited a pectoral non-adherent to the head, a second was tailless, and two specimens displayed scoliosis at level of trunchal vertebrae and tail. The abnormalities are described and their causes and consequences herein considered.
{"title":"Morphological abnormalities in the Striped panray, Zanobatus schoenleinii (Zanobatidae) from the coast of Senegal (Eastern Tropical Atlantic)","authors":"C. Capapé, S. Rafrafi-Nouira, Y. Diatta, Almamy Diaby, C. Reynaud","doi":"10.22370/rbmo.2022.57.especial.3176","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3176","url":null,"abstract":"The capture of four abnormal specimens of the Striped panray, Zanobatus schoenleiniii was reported from shallow coastal waters surrounding the touristic area of Dakar, Republic of Senegal, and among them, some specimens displaying morphological deformities. A specimen exhibited a pectoral non-adherent to the head, a second was tailless, and two specimens displayed scoliosis at level of trunchal vertebrae and tail. The abnormalities are described and their causes and consequences herein considered.\u0000 ","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124045537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3418
Francisco Polanco-Vásquez, A. Hacohen-Domené, E. E. BECERRIL-GARCÍA, S. Hernández
This study constitutes the first record and a range extension of the roughskin spurdog (Cirrhigaleus asper) in the Caribbean Sea. A total of three mature female specimens were captured by artisanal fishermen between March and May of 2016 of Guatemala. The total length of the sharks ranged from 1,110-1,280 mm, which is the largest total length so far reported for this species.
{"title":"New record and range extension of the roughskin spurdog Cirrhigaleus asper in the Caribbean Sea","authors":"Francisco Polanco-Vásquez, A. Hacohen-Domené, E. E. BECERRIL-GARCÍA, S. Hernández","doi":"10.22370/rbmo.2022.57.especial.3418","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3418","url":null,"abstract":"This study constitutes the first record and a range extension of the roughskin spurdog (Cirrhigaleus asper) in the Caribbean Sea. A total of three mature female specimens were captured by artisanal fishermen between March and May of 2016 of Guatemala. The total length of the sharks ranged from 1,110-1,280 mm, which is the largest total length so far reported for this species.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124061025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3330
Germán Pequeño-Reyes
Se presenta un recuento de las principales obras que han constituido la base del conocimiento sobre los condrictios en Chile, a partir del siglo XVIII hasta el siglo XX. También se resumen aspectos importantes de lo avanzado hasta el presente siglo y se entregan opiniones relacionadas con posibles desarrollos futuros.
{"title":"Breve historia de la condrictiología en Chile","authors":"Germán Pequeño-Reyes","doi":"10.22370/rbmo.2022.57.especial.3330","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3330","url":null,"abstract":"Se presenta un recuento de las principales obras que han constituido la base del conocimiento sobre los condrictios en Chile, a partir del siglo XVIII hasta el siglo XX. También se resumen aspectos importantes de lo avanzado hasta el presente siglo y se entregan opiniones relacionadas con posibles desarrollos futuros.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124142664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3410
A. Kobelkowsky, Cristina Ramírez‐Díaz
The organization of the neurocranium, the encephalon, and the main sensory organs of Rostroraja texana (Family Rajidae) corresponds to the general morphological pattern of the elasmobranchs and, in particular, of the batoids. The neurocranium presents the rostrum, which corresponds to about 50% of the cranial length; additionally, it shows two dorsal fontanelles of similar shape and size. The anatomical relations of the neurocranium of R. texana are with the encephalon, the main sensory organs, the antorbital, synarcual, and spiracular cartilages, and with the mandibular, hyoid, and extra-ocular musculature. The encephalon is relatively narrow. The cerebellum is symmetrical and shows a partial division in the anterior and posterior portions. In the olfactory system, the following characteristics stand out: the external pigmentation of the olfactory organs, the high number of olfactory lamellae, and the asymmetry of the olfactory bulbs. In the optical system, the presence of the pupillary operculum and the division into two sections of the superior oblique muscle is notable. And, in the statoacoustic system, the large size of the saccular otoconia stands out.
{"title":"Anatomy of the neurocranium, encephalon, and main sensory organs of the roundel skate, Rostroraja texana (Rajiformes: Rajidae)","authors":"A. Kobelkowsky, Cristina Ramírez‐Díaz","doi":"10.22370/rbmo.2022.57.especial.3410","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3410","url":null,"abstract":"The organization of the neurocranium, the encephalon, and the main sensory organs of Rostroraja texana (Family Rajidae) corresponds to the general morphological pattern of the elasmobranchs and, in particular, of the batoids. The neurocranium presents the rostrum, which corresponds to about 50% of the cranial length; additionally, it shows two dorsal fontanelles of similar shape and size. The anatomical relations of the neurocranium of R. texana are with the encephalon, the main sensory organs, the antorbital, synarcual, and spiracular cartilages, and with the mandibular, hyoid, and extra-ocular musculature. The encephalon is relatively narrow. The cerebellum is symmetrical and shows a partial division in the anterior and posterior portions. In the olfactory system, the following characteristics stand out: the external pigmentation of the olfactory organs, the high number of olfactory lamellae, and the asymmetry of the olfactory bulbs. In the optical system, the presence of the pupillary operculum and the division into two sections of the superior oblique muscle is notable. And, in the statoacoustic system, the large size of the saccular otoconia stands out.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132102374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3331
Tania Ponce, L. Cubillos, E. Acuña, Cecilia Gatica
The dusky finless skate Gurgesiella furvescens appears sporadically as part of the bycatch in the trawl fishery targeting demersal crustaceans on the continental shelf and upper slope of the north-central area of Chile (26ºS-33ºS). Demersal crustaceans could be forage for deep-water predators such as G. furvescens, and sizes and shapes of prey eaten could be restricted by mouth size. The diet composition of G. furvescens was determined based on specimens collected from the bycatch of trawls targeting demersal crustaceans in 2013. Stomach contents revealed nylon shrimp Heterocarpus reedi (32.8% by weight), deep-water shrimp Haliporoides diomedeae (7.2% by weight), and indeterminate crustaceans (9.0% by weight). The diet composition was similar between sexes, body length, or depth strata. Prey size was a linear function of Gurgesiella furvescens mouth width, and prey mass positively related with G. furvescens individual mass. Although squat-lobsters Pleuroncodes monodon and Cervimunida johni were abundant in the study area, the nylon shrimp and deep-water shrimp in the diet of G. furvescens may be due to the preference or selection of this kind of prey in deep waters.
{"title":"Diet of the Dusky finless skate Gurgesiella furvescens (Chondrichthyes: Rajidae) from the continental shelf and slope of the north-central area of Chile","authors":"Tania Ponce, L. Cubillos, E. Acuña, Cecilia Gatica","doi":"10.22370/rbmo.2022.57.especial.3331","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3331","url":null,"abstract":"The dusky finless skate Gurgesiella furvescens appears sporadically as part of the bycatch in the trawl fishery targeting demersal crustaceans on the continental shelf and upper slope of the north-central area of Chile (26ºS-33ºS). Demersal crustaceans could be forage for deep-water predators such as G. furvescens, and sizes and shapes of prey eaten could be restricted by mouth size. The diet composition of G. furvescens was determined based on specimens collected from the bycatch of trawls targeting demersal crustaceans in 2013. Stomach contents revealed nylon shrimp Heterocarpus reedi (32.8% by weight), deep-water shrimp Haliporoides diomedeae (7.2% by weight), and indeterminate crustaceans (9.0% by weight). The diet composition was similar between sexes, body length, or depth strata. Prey size was a linear function of Gurgesiella furvescens mouth width, and prey mass positively related with G. furvescens individual mass. Although squat-lobsters Pleuroncodes monodon and Cervimunida johni were abundant in the study area, the nylon shrimp and deep-water shrimp in the diet of G. furvescens may be due to the preference or selection of this kind of prey in deep waters.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122180244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3417
Inés Pereyra, Laura Paesch, W. Norbis
The determination of the optimal sample size is important to obtain an adequate estimation of the size frequency distribution, as well as consistent estimators of the population parameters corresponding to the size composition, such as the mean value. In this work, the optimal sample size was determined to obtain a consistent estimate of the mean and a representative length frequencies distribution for Mustelus schmitti caught by artisanal and industrial fisheries off the Uruguayan coast. With representative samples, the mean estimators, its confidence interval, and the median with the 25 and 75% quartiles could be used to analyze temporal trends related to changes in the size structure.
{"title":"Representatividad de la composición de tallas del gatuzo Mustelus schmitti (Chondrichthyes, Triakidae) capturado por la flota artesanal y de arrastre comercial en la costa atlántica uruguaya","authors":"Inés Pereyra, Laura Paesch, W. Norbis","doi":"10.22370/rbmo.2022.57.especial.3417","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3417","url":null,"abstract":"The determination of the optimal sample size is important to obtain an adequate estimation of the size frequency distribution, as well as consistent estimators of the population parameters corresponding to the size composition, such as the mean value. In this work, the optimal sample size was determined to obtain a consistent estimate of the mean and a representative length frequencies distribution for Mustelus schmitti caught by artisanal and industrial fisheries off the Uruguayan coast. With representative samples, the mean estimators, its confidence interval, and the median with the 25 and 75% quartiles could be used to analyze temporal trends related to changes in the size structure.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114130933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3414
Cristina Celaya-Castillo, E. I. Romero-Berny, J. M. LÓPEZ-VILA, Juan P. Arias-Aréchiga
This paper presents size structure by sex and length-length relationships for Carcharhinus falciformis and Sphyrna lewini caught by an artisanal fishery in the Gulf of Tehuantepec, Mexico. According to a local processing practice in this fishery, when sharks are landed, their jaws are removed but not their heads. The orbit-fork length was evaluated as a basis for estimating total length. A good fit (r2 > 0.9) of linear regression models for length-length relationships was calculated for both species. Overall data showed that this area is an important habitat for juvenile sharks, and standardizing measurements is proposed to better characterize the catch structure.
{"title":"Size structure and length-length relationships for two shark species (Chondrichthyes: Carcharhiniformes) from an artisanal fishery in the Gulf of Tehuantepec, Southern Mexico","authors":"Cristina Celaya-Castillo, E. I. Romero-Berny, J. M. LÓPEZ-VILA, Juan P. Arias-Aréchiga","doi":"10.22370/rbmo.2022.57.especial.3414","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3414","url":null,"abstract":"This paper presents size structure by sex and length-length relationships for Carcharhinus falciformis and Sphyrna lewini caught by an artisanal fishery in the Gulf of Tehuantepec, Mexico. According to a local processing practice in this fishery, when sharks are landed, their jaws are removed but not their heads. The orbit-fork length was evaluated as a basis for estimating total length. A good fit (r2 > 0.9) of linear regression models for length-length relationships was calculated for both species. Overall data showed that this area is an important habitat for juvenile sharks, and standardizing measurements is proposed to better characterize the catch structure.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121440121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3209
D. Ebert
A new genus of skate (Caliraja gen. nov.) is described based on egg case morphology and the number of embryos per egg case. Caliraja gen. nov. egg cases differ from those of the genus Beringraja by a combination of following characteristics: egg cases relatively small in size, lacking ridges, fine striations on the capsule surface, and moderately long horns about the size of the capsule compared to the much larger Beringraja egg cases that possess distinctly prominent ridges, no striations, and short or obscure horns. The most significant difference is the new genus has a single embryo per egg case, while Beringraja have 1-9 embryos per egg case, averaging 3-5 per egg case. Evolutionarily the egg case morphology of Beringraja is more primitive than the new genus Caliraja gen. nov.
根据卵壳形态和每个卵壳的胚胎数描述了一个新的鳐属(Caliraja gen. 11 .)。Caliraja gen. 11 .的卵与Beringraja属的卵有以下特点:卵的大小相对较小，没有脊，蒴果表面有细条纹，与大得多的Beringraja的卵相比，卵的角中等长，大约有蒴果大小，而Beringraja的卵具有明显突出的脊，没有条纹，角短或不明显。最显著的区别是新属每卵有一个胚胎，而beringgraja每卵有1-9个胚胎，平均每卵3-5个。从进化的角度看，白桦尺蠖的卵壳形态比新属Caliraja gen. nov更原始。
{"title":"Caliraja gen. nov., a new skate genus (Rajiformes: Rajidae) from the eastern North Pacific","authors":"D. Ebert","doi":"10.22370/rbmo.2022.57.especial.3209","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3209","url":null,"abstract":"A new genus of skate (Caliraja gen. nov.) is described based on egg case morphology and the number of embryos per egg case. Caliraja gen. nov. egg cases differ from those of the genus Beringraja by a combination of following characteristics: egg cases relatively small in size, lacking ridges, fine striations on the capsule surface, and moderately long horns about the size of the capsule compared to the much larger Beringraja egg cases that possess distinctly prominent ridges, no striations, and short or obscure horns. The most significant difference is the new genus has a single embryo per egg case, while Beringraja have 1-9 embryos per egg case, averaging 3-5 per egg case. Evolutionarily the egg case morphology of Beringraja is more primitive than the new genus Caliraja gen. nov.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123703811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-04DOI: 10.22370/rbmo.2022.57.especial.3338
C. D. Oliveira, L. Santos, C. Oliveira
Chimaera, represented by 52 species, are deep-sea animals, therefore difficult to access for study; moreover, they are vulnerable to fishing due to their k-strategic characteristics. Despite being vulnerable, there are few studies on its life history, which makes it difficult to understand the population status of the species. Life-history parameters are essential in population ecology to assess the status and trends of population. In this study, it was proposed to evaluate the publication trends on Chimaera and the gaps in knowledge, analyzing which subject and species are most frequently studied. For this, the scientometric method was used, based on search of articles using a group of words directed to Chimaera in databases of bibliographic references (Scopus® and Web of ScienceTM). The articles were classified by year of publication, authors' location (at the country level), focus species and subject matter. The number of articles per year showed an exponential growth trend, indicating that studies on chimaera have been increased. Among the authors’countries, such as the United States of America and the United Kingdom, are prominent. The most studied species were: Hydrolagus colliei, Callorhinchus milii and Chimaera monstrosa. The main themes of the articles were anatomy, morphology and physiology, followed by systematics and evolution. The most diminished research topics were fishing and growth, for almost all species. Therefore, even with the growth trend, more effort and reinforcement is still required in the research of these fish, mainly in the aspects on fishery, growth, and reproduction themes.
中国属深海动物，有52种，研究难度较大;此外，由于它们的k-战略特征，它们很容易被捕捞。尽管它们很脆弱，但对其生活史的研究很少，这给了解该物种的种群状况带来了困难。在种群生态学中，生活史参数是评价种群状况和趋势的重要参数。在这项研究中，我们提出了评估中国era的出版趋势和知识缺口，分析研究最频繁的主题和物种。为此，我们使用了科学计量学方法，在参考书目数据库(Scopus®和Web of ScienceTM)中使用一组指向中国的单词搜索文章。这些文章按出版年份、作者所在地(在国家一级)、重点物种和主题进行分类。每年的文章数量呈指数增长趋势，表明对嵌合体的研究有所增加。在作者的国家中，美国和英国是突出的。研究最多的物种有:水螅、米氏卡洛欣chus和中国巨蝽。文章的主题是解剖学、形态学和生理学，其次是系统学和进化论。减少最多的研究主题是捕捞和生长，几乎所有物种都是如此。因此，即使在生长趋势下，对这些鱼类的研究仍需要更多的努力和加强，主要是在渔业、生长和繁殖主题方面。
{"title":"Research on chimaera with a thematical focus for life history: A scientometric analysis","authors":"C. D. Oliveira, L. Santos, C. Oliveira","doi":"10.22370/rbmo.2022.57.especial.3338","DOIUrl":"https://doi.org/10.22370/rbmo.2022.57.especial.3338","url":null,"abstract":"Chimaera, represented by 52 species, are deep-sea animals, therefore difficult to access for study; moreover, they are vulnerable to fishing due to their k-strategic characteristics. Despite being vulnerable, there are few studies on its life history, which makes it difficult to understand the population status of the species. Life-history parameters are essential in population ecology to assess the status and trends of population. In this study, it was proposed to evaluate the publication trends on Chimaera and the gaps in knowledge, analyzing which subject and species are most frequently studied. For this, the scientometric method was used, based on search of articles using a group of words directed to Chimaera in databases of bibliographic references (Scopus® and Web of ScienceTM). The articles were classified by year of publication, authors' location (at the country level), focus species and subject matter. The number of articles per year showed an exponential growth trend, indicating that studies on chimaera have been increased. Among the authors’countries, such as the United States of America and the United Kingdom, are prominent. The most studied species were: Hydrolagus colliei, Callorhinchus milii and Chimaera monstrosa. The main themes of the articles were anatomy, morphology and physiology, followed by systematics and evolution. The most diminished research topics were fishing and growth, for almost all species. Therefore, even with the growth trend, more effort and reinforcement is still required in the research of these fish, mainly in the aspects on fishery, growth, and reproduction themes.","PeriodicalId":347046,"journal":{"name":"Revista de Biología Marina y Oceanografía","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127705015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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