Latin American Journal of Aquatic Research最新文献_第4页

Diversity and bioactivity of sediment-associated fungi from a mangrove forest in Mexico with different conservation conditions 不同保护条件下墨西哥红树林沉积物相关真菌的多样性和生物活性

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-2971

Irene Lagunes, Homero Lumbreras-Martínez, C. Espinoza, J. Padrón, J. López‐Portillo, Á. Trigos

{"title":"Diversity and bioactivity of sediment-associated fungi from a mangrove forest in Mexico with different conservation conditions","authors":"Irene Lagunes, Homero Lumbreras-Martínez, C. Espinoza, J. Padrón, J. López‐Portillo, Á. Trigos","doi":"10.3856/vol51-issue3-fulltext-2971","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-2971","url":null,"abstract":"The biological importance of rhizosphere sediment-associated fungi in mangroves is poorly understood, especially when they are affected by high salinity and anaerobiosis in disturbed areas. This study evaluated the fungal diversity in the rhizosphere sediments of three mangrove species associated with three conservation conditions of mangrove forests in preserved, semi-preserved, and deteriorated areas. In addition, fungal bioactivity was correlated to the fungal diversity found in mangrove species from each area. We isolated 50 fungal strains belonging to three phyla, seven classes, and 10 orders. The fungal diversity was higher in the preserved area (H' = 2.22) than in the semi-preserved (H' = 1.73) and deteriorated areas (H' = 1.68); the redundancy analysis showed a tendency of fungal accumulation towards the rhizosphere of Rhizophora mangle and Avicennia germinans in the preserved and semi-preserved areas. In addition, the redundancy analysis showed that 10 bioactive fungi genera tended to accumulate on the rhizosphere of R. mangle and A. germinans in the preserved and semi-preserved areas. The preserved area is related to the semi-preserved area, with a 28% Jaccard similarity coefficient. The diversity and bioactivity of the isolated fungi encourage the need to conserve and restore mangrove ecosystems considering their current and potential services, such as bioprospecting new pharmacological compounds.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42355819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heavy metals in crevalle jack, Caranx hippos, and their non-intestinal parasitic helminths from Playa las Barrancas, Alvarado, Veracruz, Mexico 墨西哥韦拉克鲁斯州阿尔瓦拉多普拉亚las Barrancas的crevalle jack, Caranx河马及其非肠道寄生蠕虫中的重金属

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-2997

Jesús Montoya-Mendoza, Elizabeth González-González, M. Castañeda-Chávez, F. Lango-Reynoso, Ángel Morán-Silva

{"title":"Heavy metals in crevalle jack, Caranx hippos, and their non-intestinal parasitic helminths from Playa las Barrancas, Alvarado, Veracruz, Mexico","authors":"Jesús Montoya-Mendoza, Elizabeth González-González, M. Castañeda-Chávez, F. Lango-Reynoso, Ángel Morán-Silva","doi":"10.3856/vol51-issue3-fulltext-2997","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-2997","url":null,"abstract":"In nine Caranx hippos specimens, Cd, Pb, Cr, and Cu concentration was determined in tissues (muscle and gonad) and parasites (nematodes and cestodes). The fish were caught from February to June 2019 in Las Barrancas, Alvarado Beach, Veracruz, Mexico. Heavy metals were quantified using atomic absorption spectrophotometer. The results of the average concentration of pollutants were, Cr = 0.18 ± 0.05 mg kg-1 dry weight (dw); Cu = 0.2 ± 0.1 mg kg-1 dw; Pb = 0.022 ± 0.01 mg kg-1 dw; Cd = <0.003 mg kg-1 dw. Among the tissues, Cu was the one with the highest concentration in nematodes vs. cestodes (2.2:1); vs. gonad (2.5:1); vs. muscle (2.7:1). Due to the concentration registered in Caranginema americanum nematodes could be identified as a bioindicator species for Cu pollutant. The values generally do not exceed the limits established in the Mexican National Standard (NOM-242-SSA1-2009) for Cd and Pb (0.5 mg kg-1). Records of heavy metals do not represent a health risk from consuming C. hippos.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41697790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Serologic studies of bacterial zoonoses in free-living sea lion pups Zalophus californianus, in the Gulf of California, Mexico 墨西哥加利福尼亚湾自由生活海狮幼崽细菌性人畜共患病的血清学研究

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-3009

Rosalía Avalos-Téllez, Magdalena Limón–González, Mariana Díaz-Arellano, Osvaldo Rey Martínez Gonzalez, Erika Gabriela Palomares Resendiz, E. Díaz-Aparicio

{"title":"Serologic studies of bacterial zoonoses in free-living sea lion pups Zalophus californianus, in the Gulf of California, Mexico","authors":"Rosalía Avalos-Téllez, Magdalena Limón–González, Mariana Díaz-Arellano, Osvaldo Rey Martínez Gonzalez, Erika Gabriela Palomares Resendiz, E. Díaz-Aparicio","doi":"10.3856/vol51-issue3-fulltext-3009","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-3009","url":null,"abstract":". This study aimed to investigate the prevalence rate of brucellosis, leptospirosis, and chlamydiosis in the offspring of free-living sea lions ( Zalophus californianus ) in the Mexican Gulf of California. The work was carried out across six islands where reproduction takes place. Sixty-one blood samples were collected from seemingly healthy sea lions from six to eight weeks old. For diagnosis, serum was obtained by venae cavae puncture. In the search for smooth Brucella spp., based on phenotypic characterization, antigens were detected employing an antigen test for Brucella abortus , strain 1119-3. In the case of leptospirosis, the serological diagnosis was carried out by microscopic agglutination to identify 12 Leptospira interrogans serotypes. Lastly, Chlamydia abortus was identified using commercial ELISA (ID Screen ® ). All 61 serum samples presented negative results for the B. abortus antigen and the C. abortus ELISA . The serological diagnosis for leptospirosis showed that 29 out of 61 sera were negative (47.5%) for all serotypes, and 32 out of 61 were positive (52.5%) for at least one serotype. After studying the three diseases, results suggest that the presence of antigens against Leptospira is a potential threat to the protected sea lions from the Gulf of California.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47746469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Salinity reduction by Sarcocornia neei in hydroponics: implications in marine aquaculture wastewater remediation neei在水培中降低盐度：对海洋养殖废水修复的影响

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-3031

Silvia Gómez, C. Hurtado, J. Orellana, J. A. Gallardo

{"title":"Salinity reduction by Sarcocornia neei in hydroponics: implications in marine aquaculture wastewater remediation","authors":"Silvia Gómez, C. Hurtado, J. Orellana, J. A. Gallardo","doi":"10.3856/vol51-issue3-fulltext-3031","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-3031","url":null,"abstract":"Salinization has become one of the main environmental problems affecting the worldwide ecological balance. The effluent discharge of saline industrial effluents, such as marine aquaculture, and its rapid increase in global production in the last decades has become an important part of this problem. The halophyte Sarcocornia neei (Lag.) has proven its ability to remove and assimilate nutrients from saline wastewater, making it a promising candidate for application in phytoremediation systems. In this study, its ability to reduce water salinity was evaluated. For this purpose, the plants were reared for 53 days in artificial effluents at four different salinities: A) 0, B) 10, C) 20, and D) 30 g L-1. A significant salt reduction was obtained in all treatments with NaCl addition. The maximum decrease was achieved in treatment C, reducing 6.91 ± 1.52 g L-1, approximately 35% of the total added at the beginning of the trials. Plants tolerated all salt content ranges; no mortality or salt stress symptoms were observed in any treatment. The results obtained are a first approach suggesting that S. neei could be used for bio-desalination of saline wastewater. Further studies are needed to evaluate its application in pilot systems integrated into saline industrial effluents.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43499194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of differential growth of the protandrous hermaphrodite marine gastropod Trochita trochiformis (Littorinimorpha: Calyptraeidae) using Schnute model cases 利用Schnute模型估计原雌雄同体海洋腹足动物Trochita trochiformis (Littorinimorpha: Calyptraeidae)的差异生长

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-3016

J. C. Cerros-Cornelio, Rafael Flores-Garza, J. Padilla-Serrato, P. Flores-Rodríguez, Carmina Torreblanca-Ramírez, Alma Rubí Castrejón-Ríos

{"title":"Estimation of differential growth of the protandrous hermaphrodite marine gastropod Trochita trochiformis (Littorinimorpha: Calyptraeidae) using Schnute model cases","authors":"J. C. Cerros-Cornelio, Rafael Flores-Garza, J. Padilla-Serrato, P. Flores-Rodríguez, Carmina Torreblanca-Ramírez, Alma Rubí Castrejón-Ríos","doi":"10.3856/vol51-issue3-fulltext-3016","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-3016","url":null,"abstract":"The snail Trochita trochiformis is a mollusk captured on the coasts of Jalisco and Guerrero of the Mexican Pacific. Despite its importance in artisanal fisheries, information on its population parameters is still being determined. This research aimed to determine the diameter-weight relationship, sex ratio, cohorts, and growth of this species. Specimens were captured from October 2019 to September 2021. Shell diameter (Sd), total weight (Tw), and the sex of the organisms were gathered from a total of 1763 females and 956 males. The sex ratio was 1.84:1, and the X2 test (P < 0.05) indicated significant differences. The Sd-Tw relationship for females and males was potential-type. The values of the allometry coefficient for both sexes were b = 2.61, b = 2.60 for females, and b = 2.62 for males. In all three cases, the t-Student test indicated negative allometric growth, which indicates that the species first grows in shell diameter, then in body weight. The ANCOVA did not show significant differences in the Sd-Tw relationships between sexes (P = 0.902). The Kolmogorov-Smirnov test applied to the Sd data showed differences between sexes (P < 0.001). In females, differences were observed in 71.5% by monthly comparisons, while in males, differences were found in 58.1%. Multinomial analysis showed three modal groups and 14 individual cohorts for both females and males. Case 2 of the Schnute model was the best for females (wi = 0.39) and males (wi = 0.53), showing sigmoidal Gompertz-type growth. The resulting growth curves showed that females exhibit accelerated growth concerning males and that both sexes reach their maximum size, 88.04 and 86.23 mm, respectively, at approximately 10 years of age.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42498046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nuclear genetic structure of the white shark (Carcharodon carcharias) from the Northeastern Pacific 东北太平洋白鲨(Carcharodon carcharias)的核遗传结构

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-2984

N. C. Saavedra‐Sotelo, Paul Mendivil-Castro, Erick C. Oñate-González

{"title":"Nuclear genetic structure of the white shark (Carcharodon carcharias) from the Northeastern Pacific","authors":"N. C. Saavedra‐Sotelo, Paul Mendivil-Castro, Erick C. Oñate-González","doi":"10.3856/vol51-issue3-fulltext-2984","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-2984","url":null,"abstract":"The Northeastern Pacific (NEP) population of white sharks (Carcharodon carcharias) is genetically distinct from the rest of the world. This uniqueness results from adult fidelity to central California and Guadalupe Island aggregations sites. The strong mitochondrial genetic structure between the white sharks of central California and Guadalupe Island is also present, which indicates female philopatry. To date, few studies using nuclear DNA have found evidence of genetic patterns in the NEP white shark population, which could indicate that these sharks exhibit sex-biased dispersal. In this study, we evaluated the genetic structure, connectivity, and genetic diversity of NEP white sharks using samples from the southern California Bight (SCB), Baja California (including Sebastian Vizcaino Bay), the Gulf of California, and Guadalupe Island (GI) using nDNA (i.e. microsatellite loci). A total of five loci were successfully genotyped in 54 individuals. The patterns found in this study indicated low levels of genetic diversity among all localities (observed heterozygosity: Ho = 0.47), likely due to a founder effect. A slight genetic structure was present for NEP localities in this study (FST = 0.045, P = 0.0001), mainly identified between the SCB and GI locations. A sibship assignment analysis indicated low and moderate probabilities of full- and half-siblings between white shark juveniles from coastal areas, suggesting a high degree of connectivity between nursery areas in the NEP. Our results suggest that juveniles can mask the genetic structure in coastal zones.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41296480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of microsatellite DNA method in determining the genetic diversity of farmed broodstocks of Penaeus vannamei (Boone, 1931) in hatchery centers of Bushehr Province 应用微卫星DNA法测定布什尔省孵卵中心凡纳滨对虾(Boone, 1931)养殖亲鱼遗传多样性

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-3001

Laleh Mosavi Dehmord, M. Nazari, M. A. Chermahini, M. K. Pazir

{"title":"Application of microsatellite DNA method in determining the genetic diversity of farmed broodstocks of Penaeus vannamei (Boone, 1931) in hatchery centers of Bushehr Province","authors":"Laleh Mosavi Dehmord, M. Nazari, M. A. Chermahini, M. K. Pazir","doi":"10.3856/vol51-issue3-fulltext-3001","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-3001","url":null,"abstract":"The aim of this study was a detection of different populations of Pacific white shrimp (Penaeus vannamei Boone, 1931) farmed broodstocks and to determine their genetic indexes in hatchery centers of Bushehr province. DNA was extracted from the muscle tissue of 30 broodstocks of 11 stocks using a commercial kit. The repeated sequences were amplified using ten specific primers by PCR in the Iranian Shrimp Center. The results showed that the number of alleles was 4.5-5.5 in the studied stocks. The most allele frequency was observed in the farmed broad stocks of the third stock in the H2 hatchery center, 5.2 ± 0/359. Also, the average of observed heterozygosity in the farmed broad stocks of the second stock in the H5 hatchery center obtained 0.669 ± 0.152, more than other stocks in all centers. Genetics indexes of the farmed broad stocks of the third stock in the H2 hatchery center were increased compared with other stocks in Bucher province. The inbreeding coefficients of the first stocks in the H1 and H3 hatchery centers were significantly more than others, respectively, 0.595 ± 0.105 and 0.547 ± 0.145. The increased inbreeding coefficients of the farmed broad stocks in these stocks can be referred to due to the small size of the founder population and biased selection programs. However, this amount is acceptable according to the information of the other hatchery centers in Bushehr province and other countries. Moreover, it was concluded that broodstock with higher diversity should be used to increase the genetic indicators in the hatchery centers.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43446817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Marine pollution between gyres: plastic debris in marine turtles and dolphins in French Guiana, Equatorial Atlantic 环流之间的海洋污染：法属圭亚那和赤道大西洋海龟和海豚体内的塑料碎片

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-2923

Flore Emmonot, Blandine Siegrist, Amandine Bordin, Virginie Dos Reis, D. Chevallier, Y. Estevez, B. de Thoisy

{"title":"Marine pollution between gyres: plastic debris in marine turtles and dolphins in French Guiana, Equatorial Atlantic","authors":"Flore Emmonot, Blandine Siegrist, Amandine Bordin, Virginie Dos Reis, D. Chevallier, Y. Estevez, B. de Thoisy","doi":"10.3856/vol51-issue3-fulltext-2923","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-2923","url":null,"abstract":"Plastic pollution has not raised much attention until the 2000s, despite being manufactured for about a century. It is now considered one of the most substantial environmental issues. Here we investigate the presence of plastic contamination in 34 stranded animals on the coast of French Guiana, South America. Here we present information highlighting the magnitude of plastic contamination in marine coastal and pelagic tropical marine vertebrates on the Equatorial Atlantic coast of South America. All four species studied here are protected and emblematic vertebrates of the region, with a fragile conservation status, including the olive ridley turtle Lepidochelys olivacea, the green turtle Chelonia mydas and the leatherback turtle Dermochelys coriacea, and a small cetacean, the Guiana dolphin Sotalia guianensis. Macroplastics (polypropylene, polyethylene, terephthalate, and polystyrene) were detected in four juvenile green turtles. Microplastics (polypropylene, polyethylene, terephthalate, polystyrene, nylon, acrylates, polycarbonates) were found in 13 individuals (two dolphins, six olive ridleys, four green turtles, and the leatherback turtle). The sampled species have different diets, distribution patterns, and ages, suggesting widespread plastic pollution. The study area is located far from the oceanic gyres. However, they are influenced by the North Brazilian Current, the Amazon River, and other rivers of the Guianas.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43345202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Causal analysis of escapement of farmed salmonids in southern Chile 智利南部养殖鲑鱼逃逸原因分析

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-3005

S. Bravo, K. Whelan, Yonatan Diaz, M. T. Silva

{"title":"Causal analysis of escapement of farmed salmonids in southern Chile","authors":"S. Bravo, K. Whelan, Yonatan Diaz, M. T. Silva","doi":"10.3856/vol51-issue3-fulltext-3005","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-3005","url":null,"abstract":"Escaped salmonids are considered among the most serious threats to the aquatic environment. One hundred and nine escape incidents were reported in Chile from 2004-2021, representing some 8.53 million escaped salmonids. Of this total, 5.73 million were Atlantic salmon Salmo salar (67.2%), 0.83 million coho salmon Oncorhynchus kisutch (9.8%), and 1.96 million were rainbow trout O. mykiss (23.0%). It is estimated that 70.1% of the escaped salmonids were recorded in the Los Lagos Region, 23% in the Aysén Region, and 4.6% in the Magallanes Region. In total, 80.5% of the escapes were recorded from seawater facilities, while freshwater units accounted for 19.5%. The highest percentage of escaped salmon recorded in seawater over 2004-2021 was 1.71% of harvested salmonids in 2013. Some 39.5% of the escapes in 2015-2021 were attributed to rupturing of net cages, mainly due to adverse climatic conditions. The additional regulations introduced in 2020 by the Chilean authority, has helped to minimize the escape of farmed salmonids. As a consequence, just one escape event was reported in 2021, corresponding to 3.85% of the total number of escapees recorded from 2004-2021.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42837761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transport conditions in the planktonic phase for seahorses Hippocampus reidi Ginsburg, 1933 (Teleostei: Syngnathidae) 海马体浮游阶段的转运条件[j] . Ginsburg, 1933(鱼骨目:海马科)

IF 1 4区农林科学

Latin American Journal of Aquatic Research Pub Date : 2023-07-02 DOI: 10.3856/vol51-issue3-fulltext-2996

B. L. Maganhe, José Araújo Souto Neto, R. E. Kurokawa, H. Gallo Neto, E. G. Sanches

{"title":"Transport conditions in the planktonic phase for seahorses Hippocampus reidi Ginsburg, 1933 (Teleostei: Syngnathidae)","authors":"B. L. Maganhe, José Araújo Souto Neto, R. E. Kurokawa, H. Gallo Neto, E. G. Sanches","doi":"10.3856/vol51-issue3-fulltext-2996","DOIUrl":"https://doi.org/10.3856/vol51-issue3-fulltext-2996","url":null,"abstract":"Thousands of seahorses are traded every year as marine ornamental species. Although packing methods for live adult seahorses have already been addressed, there is no information on the transportation of juvenile seahorses. Thus, this study aimed to evaluate the possibility of packing and transportation for newly-birthed seahorses. Three batches of newborn long-snout seahorses Hippocampus reidi were transported in three independent events from Ubatuba, north coast of São Paulo, to the city of São Paulo, covering 248 km in each trip, with an average duration of 3.5 h. A mean of 350 offspring of one day old was distributed in 1 L containers with round borders at equal densities, provided with constant aeration by portable pumps. Aeration was kept so that large bubbles would create an ascending flow keeping juveniles in suspension throughout transportation. Values of survival achieved in this study, even after 10 days post-transportation, were surprisingly high, reaching over 70%. No significant shift in water temperature, pH, or salinity was observed for any transportation events. For oxygen levels, although portable pumps were used, a drop of around 15% in DO level was recorded. In view of the trending ornamental fish market, considering the limited swimming capacity of newly born seahorses and that a great number of marine fish undergo a planktonic phase, this study provides important directions to a better understanding on seahorse transportation and yet, directions for the design of new transport methodology for an efficient shipping protocol for other species.","PeriodicalId":49917,"journal":{"name":"Latin American Journal of Aquatic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43772804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0