Pub Date : 2021-04-30DOI: 10.24275/uam/izt/dcbs/hidro/2021v31n1/cabrera
R. Cabrera
{"title":"Unusual drift of Sargassum (Phaeophyceae) for the Atlantic coast of Costa Ric","authors":"R. Cabrera","doi":"10.24275/uam/izt/dcbs/hidro/2021v31n1/cabrera","DOIUrl":"https://doi.org/10.24275/uam/izt/dcbs/hidro/2021v31n1/cabrera","url":null,"abstract":"","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42500713","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 : 2021-04-30DOI: 10.24275/uam/izt/dcbs/hidro/2021v31n1/valdes
Laura Valdés-Santiago
{"title":"Characterization of microbial communities associated with cyanoalgal bloom in a dam from León, Gto. México by sequencing of variable regions of the rRNA genes16S and 18S","authors":"Laura Valdés-Santiago","doi":"10.24275/uam/izt/dcbs/hidro/2021v31n1/valdes","DOIUrl":"https://doi.org/10.24275/uam/izt/dcbs/hidro/2021v31n1/valdes","url":null,"abstract":"","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45474873","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/CORREA
Alfonso Correa-Sandova, Campus Ciudad de México
{"title":"New records of mollusks (Gastropoda, Bivalvia) from the island of Cozumel, Quintana Roo, Mexic","authors":"Alfonso Correa-Sandova, Campus Ciudad de México","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/CORREA","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/CORREA","url":null,"abstract":"","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45823646","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/JIMENEZ
Sofía Jiménez-Reyes
ABSTRACT: Background. The exploration of new structures allowing species identification is relevant for fisheries science since it permits to be managed according to their specific characteristics. The urohial is a specific structure of bony fish. The Pisces: Mugilidae is a family with very conserved morphology, so finding a structure useful to discriminate species and/or populations is a pending task. Goals. Thus, the objective is to determine the usefulness of the urohial bone shape on its lateral, dorsal and ventral view in species discrimination: Mugil cephalus and M. curema and in location discrimination, two from the Gulf of Mexico and one for the Mexican Pacific. Methods. Urohial shape was analyzed using the Procrustes method were the relative warps were submitted to discriminant analyzes and MANCOVA in order to detect differences in lateral, dorsal and shape among species and localities (α = 0.05 p <0.05). Results. Cross-validation percentages of classification percentages by species were 86.6, 96.5 and 95.1% for lateral, dorsal and ventral views, respectively where the dorsal view in addition to being the one that showed the highest percentage of classification was less influenced by size. Among locations for M. curema percentage of classification were 65.9, 54.9, and 60.4%, respectively, and for M. cephalus were 66.7, 49.0 and 56.9%, respectively. Size did not influence the uriohial shape, except in the ventral view for M. cephalus. Conclusions. The urohial bone was useful for the discrimination of species, particularly in its dorsal view, while it was less suitable for discriminating between localities.
文摘:背景。探索允许物种鉴定的新结构与渔业科学有关，因为它允许根据它们的具体特征进行管理。尿路是硬骨鱼的特殊结构。双鱼座:Mugilidae是一个形态非常保守的科，所以找到一个有用的结构来区分物种和/或种群是一个悬而未决的任务。的目标。因此，目的是确定尿路骨形状在其侧面，背侧和腹侧视图中的物种识别的有用性:Mugil cephalus和M. currema以及位置识别，两个来自墨西哥湾，一个来自墨西哥太平洋。方法。采用Procrustes法分析尿路形态，将相对翘曲进行判别分析和MANCOVA分析，以检测不同物种和不同部位的尿路外侧、背侧和形状的差异(α = 0.05 p <0.05)。结果。侧视图、背视图和腹视图按物种分类百分比的交叉验证百分比分别为86.6、96.5和95.1%，其中背视图除了是显示分类百分比最高的视图外，受大小的影响较小。其中，金缕螨的分类率分别为65.9、54.9%和60.4%，头缕螨的分类率分别为66.7、49.0%和56.9%。大小不影响尿路形状，除了在腹侧视图的头分枝杆菌。结论。尿路骨对物种的区分是有用的，特别是在它的背侧视图，而它不太适合区分位置。
{"title":"The utility of urohial shape in the discrimination of Pisces: Mugilidae species and local population","authors":"Sofía Jiménez-Reyes","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/JIMENEZ","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/JIMENEZ","url":null,"abstract":"ABSTRACT: Background. The exploration of new structures allowing species identification is relevant for fisheries science since it permits to be managed according to their specific characteristics. The urohial is a specific structure of bony fish. The Pisces: Mugilidae is a family with very conserved morphology, so finding a structure useful to discriminate species and/or populations is a pending task. Goals. Thus, the objective is to determine the usefulness of the urohial bone shape on its lateral, dorsal and ventral view in species discrimination: Mugil cephalus and M. curema and in location discrimination, two from the Gulf of Mexico and one for the Mexican Pacific. Methods. Urohial shape was analyzed using the Procrustes method were the relative warps were submitted to discriminant analyzes and MANCOVA in order to detect differences in lateral, dorsal and shape among species and localities (α = 0.05 p <0.05). Results. Cross-validation percentages of classification percentages by species were 86.6, 96.5 and 95.1% for lateral, dorsal and ventral views, respectively where the dorsal view in addition to being the one that showed the highest percentage of classification was less influenced by size. Among locations for M. curema percentage of classification were 65.9, 54.9, and 60.4%, respectively, and for M. cephalus were 66.7, 49.0 and 56.9%, respectively. Size did not influence the uriohial shape, except in the ventral view for M. cephalus. Conclusions. The urohial bone was useful for the discrimination of species, particularly in its dorsal view, while it was less suitable for discriminating between localities.","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44040713","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/VARGAS
Lady Vargas-Porras
{"title":"Periphytic algae in four water source with different temporality post use to open pit mining in Jigualito, Condoto, Chocó, Colombi","authors":"Lady Vargas-Porras","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/VARGAS","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/VARGAS","url":null,"abstract":"","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47716843","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 : 2020-12-31DOI: 10.24275/uam/izt/dcbs/hidro/2021v30n3/mazon
Edison Mazón Paredes
Background : The increasingly aquaculture development has favored the searching of new protein sources for fish feeding. Goals : 1) trying to present the first data on the culture of an important commercial species in Ecuador, 2) replacing the protein source for feeding in order to minimize the global problem of the fish-based meals in aquaculture. Methods : Guayas cichlid juvenile fish were submitted to four feeding treatments: 0%, 4%, 8% and 12% palm cake inclusion for 30 days. Several zootechnnical indexes were calculated and analyzed at the end of the experimental culture, as well as the feed proximal composition. Results : The inclusion up to 8% palm cake did not affect the apparent digestibility of dry matter, crude protein or gross energy. No differences were found in final weight, growth rate, food conversion rate, protein efficiency rate, and protein productive value among 0, 4 and 8% palm meal content treatments. As the percentage of palm kernel meal in the diets was increased, the food conversion rate decreased, increasing palm meal in diets decreased costs. Conclusions: The productive performance was not affected by the palm cake replacement in diets up to 8% with palm meal and deriving in lower feed production costs.
{"title":"Productive performance of the Guayas cichlid (Mesoheros festae) fed palm meal based diets during the juvenile stag","authors":"Edison Mazón Paredes","doi":"10.24275/uam/izt/dcbs/hidro/2021v30n3/mazon","DOIUrl":"https://doi.org/10.24275/uam/izt/dcbs/hidro/2021v30n3/mazon","url":null,"abstract":"Background : The increasingly aquaculture development has favored the searching of new protein sources for fish feeding. Goals : 1) trying to present the first data on the culture of an important commercial species in Ecuador, 2) replacing the protein source for feeding in order to minimize the global problem of the fish-based meals in aquaculture. Methods : Guayas cichlid juvenile fish were submitted to four feeding treatments: 0%, 4%, 8% and 12% palm cake inclusion for 30 days. Several zootechnnical indexes were calculated and analyzed at the end of the experimental culture, as well as the feed proximal composition. Results : The inclusion up to 8% palm cake did not affect the apparent digestibility of dry matter, crude protein or gross energy. No differences were found in final weight, growth rate, food conversion rate, protein efficiency rate, and protein productive value among 0, 4 and 8% palm meal content treatments. As the percentage of palm kernel meal in the diets was increased, the food conversion rate decreased, increasing palm meal in diets decreased costs. Conclusions: The productive performance was not affected by the palm cake replacement in diets up to 8% with palm meal and deriving in lower feed production costs.","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45588411","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/BRAVO
Rocío Anaid Bravo-Muñoz
: Se amplía el intervalo de distribución ABSTRACT Background : Squids are an important fishery resource around the world. According to references, which, generally, are not based on formal records, there are 117 species of squids in Mexico. Although taxonomic efforts to study squids from Mexico exist, research that allow the correct determination of species are still required. Goals : Make a catalogue of the species of squids inhabiting Mexican waters using specimens housed at the Colección de Peces e Invertebrados Marinos y Estuarinos of Escuela Nacional de Ciencias Biológicas (CPIME-ENCB), Instituto Politécnico Nacional. Methods : To identify specimens, we used taxonomic keys and descriptions. Results : The collection has 420 specimens corresponding to 2 orders (Myopsida and Oegopsida), 4 families (Loliginidae, Cranchidae, Enoploteuthidae and Ommastrephidae) and 13 species. Most individuals were collected in the Gulf of California and southwestern Gulf of Mexico. Conclusions : Geogra-phic distribution range of Lolliguncula diomedeae was extended to Northwest of Baja California peninsula.
：Se amplía el intervalo de distribución摘要背景：鱿鱼是世界各地重要的渔业资源。根据通常不是基于正式记录的参考文献，墨西哥有117种鱿鱼。尽管对墨西哥鱿鱼进行了分类学研究，但仍需要进行正确确定物种的研究。目标：使用国家政治研究所国家生物科学院（CPIME-ENCB）的Colección de Peces e Invertebrados Marinos和Estuarinos的标本，编制居住在墨西哥水域的鱿鱼物种目录。方法：为了鉴定标本，我们使用了分类键和描述。结果：共有420个标本，分属2目（Myopsida和Oegosida）、4科（Lolignidae、Cranchidae、Enoploteuthidae和Ommastrephidae）和13种。大多数个体是在加利福尼亚湾和墨西哥湾西南部采集的。结论：龙舌兰科植物的地理分布范围已扩展到下加利福尼亚半岛西北部。
{"title":"An annotated catalogue of squids of the Coleccion de Peces e Invertebrados Marinos y Estuarinos of the Escuela Nacional de Ciencias Biológicas (CPIME-ENCB","authors":"Rocío Anaid Bravo-Muñoz","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/BRAVO","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/BRAVO","url":null,"abstract":": Se amplía el intervalo de distribución ABSTRACT Background : Squids are an important fishery resource around the world. According to references, which, generally, are not based on formal records, there are 117 species of squids in Mexico. Although taxonomic efforts to study squids from Mexico exist, research that allow the correct determination of species are still required. Goals : Make a catalogue of the species of squids inhabiting Mexican waters using specimens housed at the Colección de Peces e Invertebrados Marinos y Estuarinos of Escuela Nacional de Ciencias Biológicas (CPIME-ENCB), Instituto Politécnico Nacional. Methods : To identify specimens, we used taxonomic keys and descriptions. Results : The collection has 420 specimens corresponding to 2 orders (Myopsida and Oegopsida), 4 families (Loliginidae, Cranchidae, Enoploteuthidae and Ommastrephidae) and 13 species. Most individuals were collected in the Gulf of California and southwestern Gulf of Mexico. Conclusions : Geogra-phic distribution range of Lolliguncula diomedeae was extended to Northwest of Baja California peninsula.","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41918620","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/HERRERA
J. Herrera-Barrientos
Background: The knowledge on the management of water as a vital resource to develop agriculture allows having greater effectiveness in its use. Goals: The agricultural activity in the lower part of the Sinaloa Riverdepends on the fresh water of the regional dams and the aquifer. Methods: The use of groundwater represents approximately 15% of the total water used. In the presence of prolonged periods of drought, new wells are drilled without the use of an appropriate guide for farmers on the location of aquifer areas with a greater hydraulic transmissivity with the purpose of exploiting them more rationally. The National Water Commission has registered more than 680 wells on both banks of the Sinaloa River. Results: The information of 205 of these pumping wells for agricultural or domestic use and the specific capacity information was analyzed. Then, 79 out of 205 wells have pumping tests. It is then determined that the objective of this research work was to find the relationship between the specific capacity (Qe) and hydraulic transmissivity (T) data of the study area using the Thiem formula, considering a fixed value of the radius of influence. This hypothetical consideration and the heterogeneities of the aquifer environment add to the T-Qe relationship an additional component, it is determined that it has a normal behavior. Using the Kalman filter it is possible to eliminate or reduce such a component, thus improving the determination of the T-Qe relation of an R-value of 0.95 (without filter) to 0.97 (with filter), for a linear and exponential relationship. Conclusions: The application of a T-Qe estimate allows characterizing the aquifer area, with this procedure a map was obtained on the distribution of T, which will serve as a guide for future exploitations of groundwater in the study area.
{"title":"Determination of hydraulic transmissivity in coastal aquifer by optimal estimation of the Qe-T relationship using Kalman filter","authors":"J. Herrera-Barrientos","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/HERRERA","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/HERRERA","url":null,"abstract":"Background: The knowledge on the management of water as a vital resource to develop agriculture allows having greater effectiveness in its use. Goals: The agricultural activity in the lower part of the Sinaloa Riverdepends on the fresh water of the regional dams and the aquifer. Methods: The use of groundwater represents approximately 15% of the total water used. In the presence of prolonged periods of drought, new wells are drilled without the use of an appropriate guide for farmers on the location of aquifer areas with a greater hydraulic transmissivity with the purpose of exploiting them more rationally. The National Water Commission has registered more than 680 wells on both banks of the Sinaloa River. Results: The information of 205 of these pumping wells for agricultural or domestic use and the specific capacity information was analyzed. Then, 79 out of 205 wells have pumping tests. It is then determined that the objective of this research work was to find the relationship between the specific capacity (Qe) and hydraulic transmissivity (T) data of the study area using the Thiem formula, considering a fixed value of the radius of influence. This hypothetical consideration and the heterogeneities of the aquifer environment add to the T-Qe relationship an additional component, it is determined that it has a normal behavior. Using the Kalman filter it is possible to eliminate or reduce such a component, thus improving the determination of the T-Qe relation of an R-value of 0.95 (without filter) to 0.97 (with filter), for a linear and exponential relationship. Conclusions: The application of a T-Qe estimate allows characterizing the aquifer area, with this procedure a map was obtained on the distribution of T, which will serve as a guide for future exploitations of groundwater in the study area.","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49430797","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/AHUATZIN
José María Ahuatzin-Hernández, Cinvestav-Ipn Unidad Mérida Departamento de Recursos del Mar
Background. Hydrozoan populations have an important role on the dynamic of the coastal ecosystems. However, the studies on hydromedusae in coastal lagoons from the Yucatan State are scarce. Goals. This study focuses on describe the specimens from the first taxonomic list of hydromedusae in a coastal lagoon of the State of Yucatan. Methods. Samples were obtained through circular surface trawls using a zooplankton net in the coastal lagoon of Bocas de Dzilam. Six sampling stations were established inside the lagoon and eight outside, in adjacent zones to the mouth of the lagoon. The collected hydromedusae were fixed in a 4% formalin solution and identified with specialized literature. Results. Nine hydromedusae, divided in 3 orders and 8 families were identified, from which Hydractinia carica constitutes a new record for the Gulf of Mexico; the descriptions and images of the specimens are presented in the paper. Conclusions. These results set a basis to start to understand the composition of hydromedusae in coastal lagoons of Yucatan and continue researching about this complex group. However, further research efforts are required in coastal environments of the peninsula, in order to better understand its composition and richness.
背景。水生动物种群对沿海生态系统的动态具有重要作用。然而，对尤卡坦州沿海泻湖中水水母的研究却很少。的目标。本研究的重点是描述尤卡坦州沿海泻湖中第一份水水母分类清单中的标本。方法。样本是通过在Bocas de Dzilam沿海泻湖使用浮游动物网的圆形表面拖网获得的。在泻湖内建立了6个采样站，在泻湖口附近的区域建立了8个采样站。将收集到的水水母固定在4%福尔马林溶液中，并用专门的文献进行鉴定。结果。鉴定出9种水水母，分3目8科，其中carica Hydractinia为墨西哥湾新记录;文中给出了试样的描述和图像。结论。这些结果为开始了解尤卡坦沿海泻湖中水水母的组成和继续研究这一复杂群体奠定了基础。然而，为了更好地了解其组成和丰富程度，需要对半岛沿海环境进行进一步的研究。
{"title":"Hydromedusae (Cnidaria: Hydrozoa) from the coastal lagoon of Bocas de Dzilam, Yucatá","authors":"José María Ahuatzin-Hernández, Cinvestav-Ipn Unidad Mérida Departamento de Recursos del Mar","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/AHUATZIN","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/AHUATZIN","url":null,"abstract":"Background. Hydrozoan populations have an important role on the dynamic of the coastal ecosystems. However, the studies on hydromedusae in coastal lagoons from the Yucatan State are scarce. Goals. This study focuses on describe the specimens from the first taxonomic list of hydromedusae in a coastal lagoon of the State of Yucatan. Methods. Samples were obtained through circular surface trawls using a zooplankton net in the coastal lagoon of Bocas de Dzilam. Six sampling stations were established inside the lagoon and eight outside, in adjacent zones to the mouth of the lagoon. The collected hydromedusae were fixed in a 4% formalin solution and identified with specialized literature. Results. Nine hydromedusae, divided in 3 orders and 8 families were identified, from which Hydractinia carica constitutes a new record for the Gulf of Mexico; the descriptions and images of the specimens are presented in the paper. Conclusions. These results set a basis to start to understand the composition of hydromedusae in coastal lagoons of Yucatan and continue researching about this complex group. However, further research efforts are required in coastal environments of the peninsula, in order to better understand its composition and richness.","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44349120","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 : 2020-12-31DOI: 10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/HERNANDEZ
Sandra Berenice Hernández-Aguilar
Background. The sailfish Istiophorus platypterus is an oviparous billfish species (family Isthiophoridae); it is caught by trolling in the sports fishery in Mexico. However, to date, there have been no reproductive biology studies of sailfish in Acapulco Bay, although the reproductive aspects of any species represent essential information for the design of management plans. Goals. Provide information on aspects of the reproductive biology of sailfish in waters off Acapulco, Bay. Methods. During the period 2008–2009, a total of 561 fish were sampled. Macroscopy analysis and quantitative histology was used to describe reproductive characteristics of the sailfish gonads. Results. 55.8% of the analyzed organisms were males, the remaining 44.2% were females, the sex ratio (1.26 M: 1 H) was different from the expected theoretical ratio. The ovaries of 155 females were classified into five ovarian development phases based on histological analysis of the most advanced group of oocytes. Sailfish is a multiple spawn with asynchronous oocyte development. Batch fecundity for 14 females with the presence of hydrated oocytes ranged from 0.330 to 2.092 × 10 oocytes with an average of 1.07 × 106 oocytes. Gonadosomatic index (GSI) indicated that sailfish have a reproductive period with peaks in August and October (mean monthly GSI= 4.3% and 5.4%, respectively). Conclusions. Population sailfish in the Bay of Acapulco is composed mainly of males, with a reproductive maximum in the case of females during the warm months of the year, as well as a relatively high fecundity.
{"title":"Reproductive biology of the sailfish Istiophorus platypterus in the Acapulco Bay, Mexico","authors":"Sandra Berenice Hernández-Aguilar","doi":"10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/HERNANDEZ","DOIUrl":"https://doi.org/10.24275/UAM/IZT/DCBS/HIDRO/2020V30N3/HERNANDEZ","url":null,"abstract":"Background. The sailfish Istiophorus platypterus is an oviparous billfish species (family Isthiophoridae); it is caught by trolling in the sports fishery in Mexico. However, to date, there have been no reproductive biology studies of sailfish in Acapulco Bay, although the reproductive aspects of any species represent essential information for the design of management plans. Goals. Provide information on aspects of the reproductive biology of sailfish in waters off Acapulco, Bay. Methods. During the period 2008–2009, a total of 561 fish were sampled. Macroscopy analysis and quantitative histology was used to describe reproductive characteristics of the sailfish gonads. Results. 55.8% of the analyzed organisms were males, the remaining 44.2% were females, the sex ratio (1.26 M: 1 H) was different from the expected theoretical ratio. The ovaries of 155 females were classified into five ovarian development phases based on histological analysis of the most advanced group of oocytes. Sailfish is a multiple spawn with asynchronous oocyte development. Batch fecundity for 14 females with the presence of hydrated oocytes ranged from 0.330 to 2.092 × 10 oocytes with an average of 1.07 × 106 oocytes. Gonadosomatic index (GSI) indicated that sailfish have a reproductive period with peaks in August and October (mean monthly GSI= 4.3% and 5.4%, respectively). Conclusions. Population sailfish in the Bay of Acapulco is composed mainly of males, with a reproductive maximum in the case of females during the warm months of the year, as well as a relatively high fecundity.","PeriodicalId":50407,"journal":{"name":"Hidrobiologica","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49606637","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}
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