Aquatic Living Resources最新文献_第10页

Comparisons of day-time and night-time hydroacoustic surveys in temperate lakes 温带湖泊昼夜水声调查的比较

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020011

M. Girard, C. Goulon, A. Tessier, P. Vonlanthen, J. Guillard

{"title":"Comparisons of day-time and night-time hydroacoustic surveys in temperate lakes","authors":"M. Girard, C. Goulon, A. Tessier, P. Vonlanthen, J. Guillard","doi":"10.1051/alr/2020011","DOIUrl":"https://doi.org/10.1051/alr/2020011","url":null,"abstract":"In recent years, due to an increased need for non-intrusive sampling techniques, hydroacoustics has attracted attention in fishery science and management. Efforts to promote standardisation are increasing the accuracy, efficiency, and comparability of this method. The European Water Framework Directive and the Standard Operating Procedures for Fisheries Hydroacoustic Surveys in North American Great Lakes has recommended that surveys be conducted at night. At night, fish usually disperse in the water column, thus allowing for single echo detection and subsequent accurate fish size estimation, while day-time schooling behaviour hampers the estimation of fish size. However, sampling during the day would often be safer and cheaper. This study analyses how fisheries hydroacoustic results differ between day-time and night-time surveys, using data from 14 natural temperate lakes of various size. Data collected during the day and night at two depth layers linked to thermal stratification were compared in terms of acoustic scattering strength, target strength, and biomass estimates. The results showed a significant correlation between day-time and night-time estimates, though biomass in the upper layer was biased for day-time surveys, mainly due to incorrect fish size estimates resulting from rare single echo detections and schooling behaviour. Biomass estimates for the lower depth layer did not significantly differ between the two diel periods. Thus, this study confirms that hydroacoustic sampling in temperate lakes should be performed at night for accurate fish stock biomass estimates.","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57823521","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: 6

Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic 东大西洋马德拉群岛鱼叉捕鱼的特征和演变

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020015

Roi Martínez-Escauriaza, C.A. Vieira, L. Gouveia, N. Gouveia, M. Hermida

引用次数: 8

Evidence of a predation event on a tagged Mediterranean spearfish (Tetrapturus belone; Pisces, Istiophoridae), inferred from pop-up satellite tagging data 有标记的地中海矛鱼(Tetrapturus belone;双鱼座，Istiophoridae)，从弹出式卫星标记数据推断

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020024

D. Malara, P. Battaglia, P. Consoli, Erika Arcadi, S. Canese, S. Greco, F. Andaloro, T. Romeo

引用次数: 1

In vivo staining with alizarin for ageing studies on chondrichthyan fishes 茜素体内染色对软骨鱼衰老的研究

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020002

J. Caraguel, T. Barreau, S. Brown-Vuillemin, S. Iglésias

引用次数: 2

Satellite image analysis reveals changes in seagrass beds at Van Phong Bay, Vietnam during the last 30 years 卫星图像分析揭示了越南Van Phong湾海草床在过去30年里的变化

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020005

Trong-Thach Vo, Khin Lau, L. Liao, X. Nguyen

引用次数: 18

The impacts of hydraulic clamming in shallow water and the importance of incorporating anthropogenic disturbances into habitat assessments 浅水水力采蛤的影响及将人为干扰纳入生境评估的重要性

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020014

B. Legare, Agnes Mittermayr, M. Borrelli

{"title":"The impacts of hydraulic clamming in shallow water and the importance of incorporating anthropogenic disturbances into habitat assessments","authors":"B. Legare, Agnes Mittermayr, M. Borrelli","doi":"10.1051/alr/2020014","DOIUrl":"https://doi.org/10.1051/alr/2020014","url":null,"abstract":"Hydraulic dredging for shellfish is known to create some of the highest levels of disturbance, affecting the benthic microfaunal community and the physical characteristics of the substrate. Properly conducted benthic habitat assessments are complex and time consuming, resulting in assessments not being conducted increasing the uncertainty in post impact studies. Hydraulic dredging for Atlantic surfclams (Spisula soldidissima) took place at Herring Cove, Massachusetts in the winter of 2014–2015 resulting in areas of high impact disturbance of the seafloor. Surveys conducted in the summer of 2015 included hydroacoustics, benthic invertebrate sampling, video, and grain size analysis for the creation of a habitat map of Herring Cove. The four habitats (A–D) identified were a mix of sand, shell, cobble, algae, and eelgrass. Habitat type “D” is a mix of sand, algae and cobble material and occurred at 12 of 18 stations. These 12 stations were distributed across areas of “high” (n = 4), “low” (n = 2), and “no” (n = 6) hydraulic dredge disturbance. Once habitat was accounted for, benthic invertebrate community structure varied significantly (Analysis of similarity; significance level of sample statistic: 0.3%) between areas of “high”, “low” to “no” disturbance. Areas of “low” to “no” dredge track coverage contained high abundances of bivalves, echinoderms, and isopods, whereas highly disturbed areas had highest abundances of polychaetes and oligochaetes. Future mapping efforts, especially surveys with biological components, need to include and quantify the level, type and spatial distribution of anthropogenic alterations. More attention should be given to “reference maps” instead of “baseline maps”. The latter of which omits to acknowledge pre-existing anthropogenic disturbances and has the potential to skew monitoring of restoration and management efforts.","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57823583","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: 1

Could the wild population of Large Yellow Croaker Larimichthys crocea (Richardson) in China be restored? A case study in Guanjingyang, Fujian, China 中国大黄鱼野生种群能否恢复?以福建省观景阳为例

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020025

G. Ye, Ying-Tien Lin, Cui Feng, L. Chou, Qutu Jiang, Panpan Ma, Shengyun Yang, Xiaofeng Shi, Mingru Chen, Xuchao Yang, C. Sanders

{"title":"Could the wild population of Large Yellow Croaker Larimichthys crocea (Richardson) in China be restored? A case study in Guanjingyang, Fujian, China","authors":"G. Ye, Ying-Tien Lin, Cui Feng, L. Chou, Qutu Jiang, Panpan Ma, Shengyun Yang, Xiaofeng Shi, Mingru Chen, Xuchao Yang, C. Sanders","doi":"10.1051/alr/2020025","DOIUrl":"https://doi.org/10.1051/alr/2020025","url":null,"abstract":"Over 90% of the world's fisheries have been fully exploited or over-fished. Included is the large yellow croaker (Larimichthys crocea), an important commercial fish species in China whose population was nearly depleted prior to the 1980s. Although overfishing and natural resources collapse present a daunting issue, some studies indicate that improved management strategies could aid in natural stock restoration to prevent depletion. We developed an integrated assessment method grounded on an ecosystem-based approach and deigned an integrated index with three key aspects of habitat suitability, natural population status and government & social interventions, to evaluate the potential restoration capacity of the species in a designated “national aquatic germplasm resource protected area” in Guanjinyang based on a data set spanning 1987 to 2015. The results show that although restoration efforts on research and rehabilitation have increased greatly since late 1990s, the effectiveness stays moderate and the natural population remains near depletion.","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57824011","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: 1

Spatio-temporal variation of water quality variables and hydrography in a seabream cage culture farm off the coast of Oman 阿曼海岸外一个海鲷网箱养殖场水质变量和水文的时空变化

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020022

D. Al-Yahyai, W. Gallardo, M. Claereboudt, G. Bruss

{"title":"Spatio-temporal variation of water quality variables and hydrography in a seabream cage culture farm off the coast of Oman","authors":"D. Al-Yahyai, W. Gallardo, M. Claereboudt, G. Bruss","doi":"10.1051/alr/2020022","DOIUrl":"https://doi.org/10.1051/alr/2020022","url":null,"abstract":"Mariculture cage farming in Oman is in its infancy stage. This study provides important baseline information about the initial state of mariculture in Oman and for the sustainable management of future local cage farming. Our main objective was to evaluate the spatio-temporal variations of water quality and hydrography around a gilthead seabream (Sparus aurata) cage farm in Quriyat (Sea of Oman). Starting in July 2018, we conducted a monitoring program over one year in which physico-chemical variables and nutrient levels were regularly measured at the farm cages and at reference sites away from the farm. Vertical flow profiles were recorded at the farm and analysed together with remotely sensed data. The results showed no significant differences among physico-chemical variables and nutrient levels between cages and reference sites. However, there were clear seasonal as well as significant short-term variations in the measurements. Winter conditions are usually homogeneous over the water column without reaching extremes. In summer we recorded surface temperatures of up to 32 °C and extended periods of hypoxia below 35 m depth. Periods of pronounced stratification were interrupted by energetic irregular flow pulses that triggered short up or down-welling events which lead to strong variations of temperature and oxygen. We did not measure a significant impact of the cage farm on the local environment. Our results rather point to the particular importance of monitoring temperature and oxygen levels. Both variables can approach threshold levels for fish farming, especially during summer. We determined the relevant characteristics of the local system and defined requirements for adequate monitoring. The findings of this study provide a timely baseline for future research on the interactions between local cage farms and the marine ecosystem and will assist in the planning and management of mariculture in Oman.","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57823719","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

Growth, mortality and yield of Sarotherodon melanotheron melanotheron (Rüppell, 1852) in the Lake Nokoué and Porto-Novo Lagoon complex Benin, West Africa 西非贝宁nokou<s:1>湖和Porto-Novo泻湖群中Sarotherodon melanotheron (r<s:2> pell, 1852)的生长、死亡率和产量

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020018

D. Lederoun, Gildas Amoussou, I. S. Baglo, Hermann Adjibogoun, Hamil Vodougnon, J. Moreau, P. Lalèyè

{"title":"Growth, mortality and yield of Sarotherodon melanotheron melanotheron (Rüppell, 1852) in the Lake Nokoué and Porto-Novo Lagoon complex Benin, West Africa","authors":"D. Lederoun, Gildas Amoussou, I. S. Baglo, Hermann Adjibogoun, Hamil Vodougnon, J. Moreau, P. Lalèyè","doi":"10.1051/alr/2020018","DOIUrl":"https://doi.org/10.1051/alr/2020018","url":null,"abstract":"The study evaluated some population parameters of Sarotherodon melanotheron melanotheron within a lagoon complex in southern Benin: Lake Nokoué and Porto-Novo Lagoon. Data on the total length, total weight, and sex were recorded monthly between January and December 2015 for 1,745 specimens captured by local fishermen. The asymptotic length L∞ was estimated at 24.68 cm. The growth rate K was 0.86. The total, natural, and fishing mortalities were estimated at 2.46, 1.71, and 0.75 y−1, respectively. The size at first sexual maturity was 8.9 and 9.2 cm, respectively, for males andfemales. The size at first capture was estimated at 9.2 cm, which indicates that fish spawn at least once before capture. The current exploitation rate of 0.31 remains below the maximum exploitation rate Emax which was 0.604 but was equal to the exploitation rate retaining 50% of the biomass of the stock (E0.5 = 0.324). This suggests that the stock of S. m. melanotheron is not overexploited in the complex. However, it is recommended that the actual rate of exploitation be kept as it is to ensure a sustainable management of these fish populations.","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57823658","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: 2

First record of Pampus minor (Actinopterygii: Perciformes: Stromateidae) from the coastal waters of Wenzhou, China 文章标题温州沿海小蕨属(放线蕨科:履带目:叠层科)首次记录

IF 1.1 4区农林科学

Aquatic Living Resources Pub Date : 2020-01-01 DOI: 10.1051/alr/2020006

Cheng Liu, Cheng Liu, Zhijin Yang, Zhijin Yang, Pan Liu, Shen Ye, Fozia Khan Siyal, G. Zhu, Longshan Lin, Longshan Lin, Yuan Li

{"title":"First record of Pampus minor (Actinopterygii: Perciformes: Stromateidae) from the coastal waters of Wenzhou, China","authors":"Cheng Liu, Cheng Liu, Zhijin Yang, Zhijin Yang, Pan Liu, Shen Ye, Fozia Khan Siyal, G. Zhu, Longshan Lin, Longshan Lin, Yuan Li","doi":"10.1051/alr/2020006","DOIUrl":"https://doi.org/10.1051/alr/2020006","url":null,"abstract":"Pampus fishes (Perciformes: Stromateidae) are important commercial species and include six valid species in China. The southern lesser pomfret (Pampus minor Liu and Li, 1998) is a species of Pampus for which knowledge is incomplete. This report confirms the occurrence of P. minor in the coastal waters of Wenzhou, China, by analyzing five specimens of P. minor obtained in Wenzhou in March 2019. Morphometric measurements and meristic counts were performed. The diagnostic morphological features of these species were consistent with those of the neotype specimen of P. minor and sufficient for separating the examined specimens from other Pampus species. This study was based on the Cytochrome Oxidase Subunit 1 (CO1) gene, which was sequenced for the purpose of identification. The genetic distances between P. minor and other Pampus species ranged from 13.4% to 15.5%, and the mean genetic distance within the P. minor group was 0.2%. Given that P. minor has not been reported in this region, our findings represent the first record from the coastal waters of Wenzhou and extend the distribution range of this species to the central and northern East China Sea. The reason for the observed northward migration of some P. minor individuals from their northernmost recorded habitat (Taiwan Strait) might be global warming. The collection of additional specimens is needed to further study the geographic limits of P. minor and its presumed northern expansion.","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"9 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57823918","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: 1