Scientia Marina最新文献_第2页

Opportunity observation of an Algerian Eddy to the south of Cape Palos (southwestern Mediterranean Sea) 帕洛斯角以南(地中海西南部)阿尔及利亚涡旋的偶然观测

4区生物学

Scientia Marina Pub Date : 2023-10-03 DOI: 10.3989/scimar.05333.070

Manuel Vargas-Yáñez, Ricardo F. Sánchez-Leal, Aida Alvera-Azcárate, Charles Troupin, Francina Moya, Enrique Ballesteros, Mariano Serra, Rosa Balbín, Vicenç Moltó, Mª Carmen García-Martínez

{"title":"Opportunity observation of an Algerian Eddy to the south of Cape Palos (southwestern Mediterranean Sea)","authors":"Manuel Vargas-Yáñez, Ricardo F. Sánchez-Leal, Aida Alvera-Azcárate, Charles Troupin, Francina Moya, Enrique Ballesteros, Mariano Serra, Rosa Balbín, Vicenç Moltó, Mª Carmen García-Martínez","doi":"10.3989/scimar.05333.070","DOIUrl":"https://doi.org/10.3989/scimar.05333.070","url":null,"abstract":"Large anticyclonic eddies can detach from the Algerian Current, forming open-sea Algerian Eddies. These mesoscale structures have been intensively studied by means of sea surface temperature and altimetry data, and using numerical models. However, few studies describe an in situ sampling of their whole vertical structure. Furthermore, the area extending from Cape La Nao (western edge of the Balearic Channels) to the Almería-Orán Front has received very little attention, and it could be considered that there is a gap in our present oceanographic knowledge of this part of the western Mediterranean. An Algerian Eddy lasting for several months was detected in December 2021 to the south of Cape Palos. In order to analyse this eddy, an opportunity sampling was designed taking advantage of the periodic monitoring campaign RADMED 0222. This sampling revealed that the eddy had a baroclinic character, affecting the whole water column. These results suggest that this eddy was generated at the Algerian Current, finally affecting an area close to the eastern Spanish coast. The presence of these structures in this region of the western Mediterranean could alter the southward progression of the Northern Current and even the presence and structure of the Almería-Orán Front.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696363","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}

引用次数: 0

Psychedelics sea slugs: Observations on colour ontogeny in two nudibranch species from the genus Nembrotha (Doridina: Polyceridae) 致幻海蛞蝓:两种海蛞蝓属裸鳃海蛞蝓的颜色个体发育观察(海蛞蝓目:海蛞蝓科)

4区生物学

Scientia Marina Pub Date : 2023-10-03 DOI: 10.3989/scimar.05371.072

Marta Pola, Yara Tibiriçá, Juan Lucas Cervera

{"title":"Psychedelics sea slugs: Observations on colour ontogeny in two nudibranch species from the genus Nembrotha (Doridina: Polyceridae)","authors":"Marta Pola, Yara Tibiriçá, Juan Lucas Cervera","doi":"10.3989/scimar.05371.072","DOIUrl":"https://doi.org/10.3989/scimar.05371.072","url":null,"abstract":"In recent decades, thanks to the use of integrated taxonomy, the traditional recognition of a nudibranch species based on observation and colour pattern variation has become increasingly questioned, mainly due to the presence of cryptic and pseudocryptic species complexes. Individuals with the same colour pattern can be genetically identical, but individuals with different colour patterns may also be genetically identical and this variation may instead represent different life stages. But things can get even more complicated. What happens when the same species changes its colour pattern radically as it ages? Here we present two extraordinary examples in species of the genus Nembrotha based on laboratory observation. Specimens of Nembrotha livingstonei Allan, 1933 and Nembrotha yonowae Goethel and Debelius, 1992 were collected in Mozambique and kept in captivity as long as feeding was possible. The results showed that colour patterns in both species changed over time and that this change was linked to diet. Furthermore, species delimitation analysis and comparison of the uncorrected COI pairwise distances of examined specimens from Mozambique and others downloaded from GenBank confirmed that N. yonowae Goether and Debelius, 1992 is a junior synonym of N. cristata Bergh, 1877. Similar studies with laboratory observations are needed on other species of the genus, as they were described on the basis of different colouration, but integrated taxonomy may show different results.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135739275","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}

引用次数: 0

Co-management of a high-value species with territorial use rights for fisheries: a spatial bioeconomic approach with environmental variability 具有渔业领土使用权的高价值物种的共同管理:具有环境可变性的空间生物经济方法

4区生物学

Scientia Marina Pub Date : 2023-10-03 DOI: 10.3989/scimar.05335.071

Victor Gerardo Vargas-López, Francisco Arreguín-Sánchez, José Luis Gutiérrez-González, Juan Carlos Seijo

{"title":"Co-management of a high-value species with territorial use rights for fisheries: a spatial bioeconomic approach with environmental variability","authors":"Victor Gerardo Vargas-López, Francisco Arreguín-Sánchez, José Luis Gutiérrez-González, Juan Carlos Seijo","doi":"10.3989/scimar.05335.071","DOIUrl":"https://doi.org/10.3989/scimar.05335.071","url":null,"abstract":"Abalone is a high-value resource that is an important export market fishery of Mexico that is managed through territorial use rights for fisheries allocated to a coastal community. A specific age-structured spatial bioeconomic model was applied to this fishery to undertake stock recovery to target levels. The model incorporates uncertainty in the parameter k of a von Bertalanffy growth function with environmental variability. The risk of falling below and exceeding the target and bioeconomic limit reference points of the population with alternative fisheries management strategies was studied using a Monte Carlo analysis. The management strategy evaluation showed that Emin (minimum effort) and EmaxNPV (resource rent maximization effort) generated higher biomass levels and higher present value of resource rent than Emsy (effort in maximum sustainable yield) at the end of the simulation period, regardless of the bioeconomic reference points and assuming a reduction in fishing effort. Emin and EmaxNPV increased and maximized the present value of resource rent generated by the species while avoiding its overexploitation. The social consequences of the management strategies were considered with the participation of fishers of this co-managed fishery.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135695633","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}

引用次数: 0

Change in the community structure and organic carbon content of meio- and macrobenthos between tidal flat and salt marsh areas colonized by Spartina alterniflora in the Bahía Blanca estuary (SW Atlantic) Bahía白卡河口潮滩与互花米草定殖盐沼区中大型底栖动物群落结构及有机碳含量的变化

4区生物学

Scientia Marina Pub Date : 2023-10-03 DOI: 10.3989/scimar.05386.073

Leandro J. Reyna Gandini, Flavia A. Funk, Paula D. Pratolongo

{"title":"Change in the community structure and organic carbon content of meio- and macrobenthos between tidal flat and salt marsh areas colonized by Spartina alterniflora in the Bahía Blanca estuary (SW Atlantic)","authors":"Leandro J. Reyna Gandini, Flavia A. Funk, Paula D. Pratolongo","doi":"10.3989/scimar.05386.073","DOIUrl":"https://doi.org/10.3989/scimar.05386.073","url":null,"abstract":"Salt marshes are regarded as among the most productive coastal ecosystems, important “blue carbon” sinks and a support for benthic communities with large abundances, whose structure may be strongly influenced by salt marsh vegetation. During the last few decades, Spartina alterniflora has been colonizing bare mudflats in the Bahía Blanca estuary, and a large increase in the area covered by salt marshes has been reported. This colonization can strongly influence the structure of benthic fauna and its role in the carbon cycle. The hypothesis of this study was that the community structure and the organic carbon contained in the meio- and macrobenthos change between tidal flats and salt marshes recently colonized by S. alterniflora. Response variables studied to compare the tidal flat and salt marsh were density, biomass and production to biomass (P/B) ratio of macro- and meiobenthos. Density and biomass of Gastropoda and P/B ratio of Nematoda were higher on the salt marsh than on the tidal flat. By contrast, density and biomass of Polychaeta were higher on the tidal flat. These results suggest that the expansion of S. alterniflora marshes on tidal flats produces changes in the structure of the macro- and meiobenthos community (taxonomic composition and biomass) that have an influence on carbon cycling.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696141","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}

引用次数: 0

The population dynamics of Carcinus maenas (Crustacea: Portunoidea) in a coastal lagoon (Portugal, SW) 沿海泻湖（葡萄牙，西南部）中马齿藻（甲壳纲：Portunoidea）的种群动态

IF 1.4 4区生物学

Scientia Marina Pub Date : 2023-07-04 DOI: 10.3989/scimar.05353.068

Teresa Portela, D. Cruz, Rui Monteiro, M. Correia, José Lino Costa, I. Domingos

{"title":"The population dynamics of Carcinus maenas (Crustacea: Portunoidea) in a coastal lagoon (Portugal, SW)","authors":"Teresa Portela, D. Cruz, Rui Monteiro, M. Correia, José Lino Costa, I. Domingos","doi":"10.3989/scimar.05353.068","DOIUrl":"https://doi.org/10.3989/scimar.05353.068","url":null,"abstract":"The green crab (Carcinus maenas) population was investigated in a coastal lagoon (Santo André) located on the southwest coast of Portugal. This study assessed the spatial-temporal variability of green crab abundance in the lagoon and its relationship with environmental variables. Experimental fishing was used to collect data on abundance, size structure and other demographic characteristics. Sampling was conducted monthly in 2019 at five sites, using fyke nets. From a total of 15063 individuals collected, 3898 were analysed. The highest catches were obtained in winter and at sites closer to the sea. The population was male-biased (58.70% of males and 41.30% of females), with an average carapace width of 48.81 mm for males and 40.79 mm for females. Ovigerous females were most abundant in December and January, and 50% were sexually mature at 45.11 mm. Based on data from the experimental fishing and fishermen’s logbooks, the estimated annual catch of green crab ranged from 1873 to 3354 kg/ha, confirming the potential value of its fishery in the lagoon. This resource can be exploited for multiple purposes, including its meat or shell waste, thus contributing to the circular economy. Considering that green crab is a bycatch of the eel fishery, fishing regulations need to be modified to safeguard the stocks of both species.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44800323","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}

引用次数: 0

Subindividual variability in sea pens (Octocorallia: Pennatulacea) 海围栏的亚个体变异性（八角珊瑚属：彭纳图拉科）

IF 1.4 4区生物学

Scientia Marina Pub Date : 2023-07-04 DOI: 10.3989/scimar.05260.063

F. García-Cárdenas

引用次数: 1

Infralittoral coralligenous reefs: structure and spatial variability of macroalgal assemblages 近海珊瑚礁：大型藻类组合的结构和空间变异

IF 1.4 4区生物学

Scientia Marina Pub Date : 2023-07-04 DOI: 10.3989/scimar.05290.065

L. Piazzi, L. Pacciardi, M. Pertusati, C. Pretti, A. D. De Biasi

{"title":"Infralittoral coralligenous reefs: structure and spatial variability of macroalgal assemblages","authors":"L. Piazzi, L. Pacciardi, M. Pertusati, C. Pretti, A. D. De Biasi","doi":"10.3989/scimar.05290.065","DOIUrl":"https://doi.org/10.3989/scimar.05290.065","url":null,"abstract":"Coralligenous reefs are calcareous structures edified mostly by coralline algae that characterize the circalittoral zone of the Mediterranean Sea. However, in some cases coralline algae can constitute peculiar infralittoral biogenic reefs which have been studied less than the circalittoral ones. This study aims to contribute to the knowledge of infralittoral coralligenous reefs by describing their macroalgal assemblages on a large rocky platform off the Tuscany coasts, northwestern Mediterranean Sea. To this end, a multifactorial sampling design was used to describe the structure of the assemblages and to evaluate the variability of the system at multiple spatial scales. A total of 71 macroalgal taxa were found on the coralline algae. Macroalgal assemblages were well structured, with high biodiversity values. The dominant taxa included both photophilous and sciaphilous species, guaranteeing peculiar characteristics in these assemblages, above all if compared with the typical infralittoral and circalittoral macroalgal communities of the same geographic area. The assemblages showed greater variability at a small and intermediate spatial scale than at a large scale. Although infralittoral coralligenous outcrops constitute a peculiar system, they are still poorly understood and should not only be the object of specific studies but also be included in monitoring programmes.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42719283","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}

引用次数: 0

Maternal influence on the larval morphometry of the brush-clawed shore crab Hemigrapsus takanoi (Decapoda: Brachyura) 母体对刷爪滨蟹幼体形态计量学的影响

IF 1.4 4区生物学

Scientia Marina Pub Date : 2023-07-04 DOI: 10.3989/scimar.05327.066

J. Landeira, E. Fatira, K. Banno, Yuji Tanaka

引用次数: 0

Reproduction and growth of the Red Sea goatfish Parupeneus forsskali in its new environment (Cyprus, eastern Mediterranean Sea) 红海山羊鱼在新环境(地中海东部塞浦路斯)中的繁殖和生长

IF 1.4 4区生物学

Scientia Marina Pub Date : 2023-07-04 DOI: 10.3989/scimar.05317.064

Sigurdur Saemundsson, Athanassios C. Tsikliras, N. Chartosia

{"title":"Reproduction and growth of the Red Sea goatfish Parupeneus forsskali in its new environment (Cyprus, eastern Mediterranean Sea)","authors":"Sigurdur Saemundsson, Athanassios C. Tsikliras, N. Chartosia","doi":"10.3989/scimar.05317.064","DOIUrl":"https://doi.org/10.3989/scimar.05317.064","url":null,"abstract":"In the Mediterranean Sea, six species of Mullidae have been recorded, four of them being alien to the area. The most recent arrival in the Mediterranean is the Red Sea goatfish (Parupeneus forsskali), which was first spotted there in the year 2000. Although P. forsskali is endemic to the Red Sea and the Gulf of Aden, it has recently expanded its distribution; it was confirmed in Cyprus in 2014. Since then, it has established a thriving population around the island, and is now commercially important. In the present study, the spawning season and gonad development of P. forsskali off the coast of Cyprus were studied, along with important biological parameters. Macroscopic and histological analyses of the gonads indicated five maturity phases for both ovaries and testes. The gonadal maturity phases and the gonadosomatic index indicated that P. forsskali spawns in the summer months, with the peak of the spawning season in July. Males were bigger, heavier, and more abundant than females, and the length-weight relationship was found to be TW=0.0065 TL3.17 for males and TW=0.0086 TL3.07 for females, both indicating positive allometric growth. The size at first sexual maturity (LM) was 14.2 cm for males and 11.8 cm for females. Five age groups were identified from the length-frequency distribution (0-4 years old). Age group 1 was the most dominant one, containing almost 60% of the sampled individuals. Natural mortality (M) declined with age, and the mean natural mortality coefficient across ages was 0.563 year-1. Overall, this is the first study that provides important information on the spawning season of the Red Sea goatfish and other estimations on various biological traits in its non-native habitat that can be of great importance for fisheries management.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41727385","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}

引用次数: 0

Effects of misrepresentative length samples on individual growth and stock condition estimates 错误长度样本对个体生长和种群状况估计的影响

IF 1.4 4区生物学

Scientia Marina Pub Date : 2023-07-04 DOI: 10.3989/scimar.05313.062

E. Villa-Diharce, M. A. Cisneros-Mata, Evlin A. Ramírez-Félix

{"title":"Effects of misrepresentative length samples on individual growth and stock condition estimates","authors":"E. Villa-Diharce, M. A. Cisneros-Mata, Evlin A. Ramírez-Félix","doi":"10.3989/scimar.05313.062","DOIUrl":"https://doi.org/10.3989/scimar.05313.062","url":null,"abstract":"Despite its importance in fisheries studies, there is insufficient understanding on the effect of sampling error or bias on individual growth and other stock indicators. We show the influence of sample length distributions on parameter estimates, illustrating with an example. For the brown swimming crab, we simulated length samples in five configurations and estimated parameters of von Bertalanffy (k, L∞L∞ , t0), asymptotic weight ( W∞W∞ ), weight-length relationship (a, b), growth performance (ϕ’) and condition factor (Kn). Parameter estimates were compared with baseline values using relative bias, standard error and root mean square error. The results show that the accuracy and bias of parameter estimates depend on the lengths sampled. For example, the bias and accuracy of L∞L∞ and W∞W∞ vary inversely with sampled length, whereas combining length segments yields smaller biases of k and t0 than those of L∞L∞ and W∞W∞ . In general, the accuracy of parameter estimates does not always depend on sampling the entire length range, and errors are not the same for all parameters. These results are useful to guide sampling when resources are scarce. We discuss potential reasons for incomplete length sample structure and offer recommendations to obtain best estimates for parameters of interest.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48553120","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}

引用次数: 0