Mediterranean Sea - Science topic

Dear Marco Grillo

Thank you very much for your helpful response regarding the identification of the specimen. I truly appreciate your time and expertise.

Your suggestion that it may belong to the genus Paracartia, and possibly Paracartia latisetosa, is very valuable. I will follow your recommendation and take a closer look at the morphological details, especially the leg setation, to try and confirm the species. The website you shared is also an excellent resource, and I will consult it thoroughly.

Again, thank you for your kind assistance.

Best regards,

try the Rosario project data? By the University of Malta Dept of Geosciences

Dear Caroline,

WorldClim contains data only for the terrrestial raster cells. So I completely agree with Alexandre Schickele and Pietro Milanesi . You should download marine datasets, such as Bio-ORACLE (https://www.bio-oracle.org/).

HTH,

Ákos

I can give you some general information about the types of species you mentioned.

The first 5 pictures you've described as medusae, which are jellyfish-like creatures that belong to the phylum Cnidaria. Semaeostome Chrysaora is a genus of jellyfish that are typically found in coastal waters, and they have a typical bell shape with long tentacles. They are known for the bright colors, and the size of the bell can vary between 1.5 and 10 cm.

The creature shown in picture 6 is harder to identify without visual confirmation, however, based on your description, it could be a salp chain or a pyrosome colony. Salps are marine invertebrates that belong to the phylum Tunicata, and they are common in the open ocean, they have a long and cylindrical shape that can be up to 10 cm in size. Pyrosomes are also common in the open ocean, they are colonial tunicates which are formed by many individuals living together, they have a cylindrical shape and can be up to several meters in size.

I would recommend consulting a marine biologist or an expert in marine invertebrates for a more accurate identification of the species in the photos. They may need additional information such as location, depth, water temperature and salinity.

We have created a GPU accelerated database that compiles stress factors for underwater biodiversity: https://deepsea.blue/ it looks it fits with the project.

The seas and oceans partially buffer the greenhouse effect. However, the increasing temperature and acidity of seawater and oceans is causing the extinction of coral reefs and many marine life. These are also very negative effects of the ongoing global warming process.

Greetings,

Dariusz Prokopowicz

Good paper Nasr-Eddine Taibi shared

Thank you Georgios Gastouniotis :)

Dear Raquel,

Many thanks for your proposition.

Regards. Younes

Plenty in Mediterranean sea . In net as well as in aquarium to attract visitors. Shark liver oil is costly. Even it is important for vitamin A enriched capsules available in market.

Karla Mihić Youre welcome and all the best in your research!

You could try https://www.inaturalist.org/ as well.

To the my best knowledge, the longest available (since 1982) high resolution, L4 satellite-derived dataset is the one from the Copernicus Marine Environment Monitoring Service (CMEMS, http://marine.copernicus.eu). The very high spatial (~4x4 km) and daily temporal resolution has been shown to be suitable for studying SST trends and anomalies even at regional scales. It is distributed freely under the name SST_MED_SST_L4_REP_OBSERVATIONS_010_021 in the CMEMS catalogue.

hope it helps

all the best,

Naomi

Phorcus turbinatus is correct.

ftp://ftp.ais.dk/ais_data/

it's likely to be easier to catch in the pelagic phase of behaviour in depths of between 100 and 200 m

Dimitra Malliouri thank you very much Dimitra! I see that the data provided freely on-site are only the annual reports together with some raw data, but divided in yearly (for monthly mean/max) or monhtly (for hourly mean values) segments. Yet it seems rather hard to download long time-series of high-frequency raw data. So I'll try to officially request datasets via contacting officers.

Appreciate your help!

Best regards, Chris

It's an old topic, but, Are you sure to give available data (Geographic coordinates) for this undangered species?

Regards

Please see the link below:

DOI 10.1007/s11001-011-9142-0

Best regards

Leelambar Singh I can't find anything about deep water temperature, do you have any advice on what to look for?

Dear Palumbo,

Thank you for your answer. I will go through it. Thank you very much.

Regards,

Sarthak

Dear Sami Abidli,

You will find some relevant information in the following paper:

Dear Louis,

Look at this paper

All best

Ok, Yair, thanks. I understand. If you checked the electrolyte and the membrane, this case may have two sources of problems: 1) sensor breakage 2) problem with the main probe.

We didn't face such probem.

In my humble opinnion this problem can be solved just by service specialists of seabird company.

I looked as well. Maybe this page is relevant for you?

Hello Semion,

You may want to try through REMPEC: http://www.rempec.org/

Israel is a contracting party to the Barcelona convention, which also concerns maritie Ttransport related issues. Through REMPEC, a project has been performed, where AIS was used. http://safemedgis.rempec.org/

I am not sure what the basis of this data is, and access is in principle only for administrations. However, you will find the contact information for the Israeli administration, and you could contact them to obtain access for research purposes. I know of other countries (in the Baltic sea area), where such arrangements have been made.

There may be other options, e.g. contacting REMPEC directly.

I hope this helps.

Good luck with your efforts!

Kind regards.

From Valencian Community (Spain) you can find the list of every Ports (commercial and non-commercial) with coordinates and services provided.

Dear Mr. Eldeen,

you can find a useful ID-Guide to mediterranean Actiniaria in the book of R. Hofrichter (ed.) published 2003 in the Spektrum-Verlag (german language): Das Mittelmeer - Fauna, Flora, Ökologie. The key in the Actiniaria chapter (written by Vreni Häussermann) shows photographs of all the species, which are described in brief re. their characters, size, ecology, reproduction and distribution. Hope this helps,

Cheers, Götz.

Thank you Fredric,

In medess4ms I did not find that them publishing any database of oil spill, I wrote them a letter, hoping they would answer.

Dear MN. Its good to note it has been useful. You may send the notes collecred by you for my reference on this conversation pl. Will build up relevant notings.pl. well wishes. 

Ask the question to Lassad Neifar

University of Sfax:

Nearly 15 years ago, this disease was rampant in the United States. The experiences they have gained can help us in Europe when the vines are concerned.

Dear Van Van,

Please take a look to these papers.

Thanks for your assistance!

Thank you all for your answers! Sir Uwe, great suggestion! Hopefully I, or some other researcher will try that experiment someday.

 Hi Anatoly,

Yes! Your emails were most helpful, so glad we connected. I will continue to follow your research here on ResearchGate.

Jenell

Jeff, Ken Riley at the NOAA lab in Beaufort showed me a neat little velocity meter/wave meter you would attach to a vertical line; you could put a number of them vertically. They were cheap but I cannot find the information.

Tom,

I am attaching a couple papers that may be of help.

Also this paper: https://pdfs.semanticscholar.org/76bf/29887ea3175237b8301328cde647b25de09a.pdf

Tomas

To follow up on Andrew Peterson's answer, aspect is really a direction vector in two dimensions and so is made up itself of two variables. These can be rather arbitrary but in ecological work "northness" = cos(aspect) and "eastness" = sin(aspect) are very useful variables.

Make sure that your aspect  -- which is likely measured in degrees as from a DEM in a GIS or in the field as from a compass -- is in radians.  R, ArcMap and even Excel trig functions expect arguments in radians and many an unknowing student and researcher have applied the functions without converting degrees to radians with disastrous results.

To see if your aspect is in degrees do a quick summary or histogram. Anything over about 6.5 is a sign that your aspect is in degrees -- if the range is 0 to 360 then you know for sure it's degrees. If it's 0 to about 6.28 then it's most likely radians.

To convert degrees to radians divide out the degrees with 180 then multiply in the radians with pi (3.14...):

rad = pi*degrees/180

Now applying the cosine function to the radians that came from geographic degrees will generate the "northness" variable and it will be between 1 (due north) and -1 (due south) with zero being neither north nor south in aspect (but rather east or west -- see below).

Applying the sine function to geographic radians gives "eastness", also between zero and one, with +1 directly east and -1 directly west. 

Notice that because cos^2 + sin^2 = 1 that eastness^2 + northness^2 = 1, meaning that it's impossible to have northness = 1 and eastness be anything other than zero.

Hope that's not elaborating the obvious too much, but for most of us ecologists it's been too long since we studied trigonometry!

Please give a look at the webpage of EMODnet Mediterranean Checkpoint project. Challenge 5 is dedicated to the fishery management. At the bottom of the page you can find the Targeted Products, in particular look at the MEDSEA_CH5_Product_6 and MEDSEA_CH5_Product_7 produced from AIS data and their GIS visualization.

You can find also the TEAM involved, that you could contact to ask further info about the data availability.

Please go through this useful attachment also.

Global database of dams (but I´m not sure that it includes small dams):

UNEP GEOdata from United Nations Environment Programme:

Thank you very much for your information Carlo Froglia

Hi Andrea,

as far as I know, it's not formally forbidden. Actually, it's widely introduced beyond its native range, but that's not what the CBD promotes. Have a look at FishBase for some basics: http://fishbase.de/summary/Salmo-trutta.html

Hi Vale!

Don't know if you have matlab but if you do

%% Open netcdf

ncid = netcdf.open('yourfile.nc','NC_NOWRITE');

%% Get all information about the netcdf file

fileinfo = ncinfo('yourfile.nc');

disp(fileinfo);

%% get info on a dimension

dim_0=netcdf.inqVar(ncid,0);

dim_1=netcdf.inqVar(ncid,1);

dim_X=netcdf.inqVar(ncid,X); (with X==max number dimension in the file)

%% get values corresponding to a dimension

var_0 = netcdf.getVar(ncid,0); (e.g. var_0=latitude)

var_1 = netcdf.getVar(ncid,1); (e.g. var_1=longitude)

var_X= netcdf.getVar(ncid,X); (e.g. var_X=SST)

All done!

there are estensive reports of Sperm whale stranded in shallow waters in Adriatic sea. Last one was a young male of 9 m close to Rimini few years ago

Try adding one or two layers of coffee filters in your hand-held net (assuming that is what you use to scoop the whale poop). You then take the filters with the faeces out and add new layers for the next sampling. Try it out first with a VERY ripe tomato that you squeeze in a bath tub, to mimic the whale poop floating in the sea...

Ophisurus serpens (Linnaeus, 1758)  

(http://marinespecies.org/aphia.php?p=taxdetails&id=126317)

Olindias phosphorica...a jellyfish

ASCAT data are available in NETCDF format here

You can use any software for downloading it like:

---------

If you want them in GIS format you can install MGET  tools from here 

or directly from here as raster data 

Good question asked,

Juan, thanks a lot for your information!

I'll being looking for such a person who dealt with the information in question directly.

Thanks again!

Hello,

I studied the rip-current in Gulf of Giens in South of France by using a model MIKE 21/3 FM Coupled.

I received the good results.

Mr. V.V.T

Thank you for your answer.

I read these papers.

I think that we have 3 ways to describe the influence of Posidonia

1. Energy dissipation by vegetation has been implemented in version 7.0 of Tomawac

Source: http://www.opentelemac.org/index.php/assistance/forum5/19-tomawac/7498-wave-energy-dissipation-by-vegetation-in-tomawac

2. through friction coefficient Collins (use Collins coefficient for the bottom friction)

We need to change the code in Tomawac.

Source: http://www.opentelemac.org/index.php/kunena/19-tomawac/7206-influence-of-vegetation-in-reducing-wave-height#13871

3. change bed rougness over Posidonia (bigger than sand, smaller than rock)

V.V.T

Hello Stefania, you can take also a look at these two studies  performed in the MED, one focusing on biocumulation of PAHs in Zooplankton and the other on non-DL PCBs and OCPs in plankton. Maybe interesting for you. Regards.Javier

No doubt, this is what remains of a scyphozoan jellyfish Chrysaora hysoscella. Probably it has experienced a turtle bite! Keep it in ethanol, we are working on this species, please!! Grazie, Luigi

Dear Halit:

The first formal record of the species was by Tortonese (1963: 158) (as Aprionodon brevipinna) in:

Tortonese, E. 1963. Elenco riveduto dei Leptocardi, Ciclostomi, pesci cartilaginei e ossei del mare mediterraneo. Annali del Museo Civico di Storia Naturale "Giacomo Doria", 74: 156-185.

This record was based on an earlier misidentification as Carcharhinus limbatus by Tortonese (1938: 158) in:

Tortonese, E. 1938. Uno squalo nuovo per il Mediterraneo. Natura, 29: 157-160.

Details of the case can be checked on p. 23-24 in:

Hureau, J.-C. & Monod, T. (eds.) 1973. Check-list of the fishes of the north-eastern Atlantic and of the Mediterranean. Vol. 1. UNESCO, Paris.

With best wishes,

Ron

Dear .. Cantasano 

I am working in Libya and Egypt . I and I’m will be very happy to contribute with you .

Thanks Fatima

Please, send these articles by mail

I have difficulties to download these documents from researshgate.

Sincerly

I particularly think we should talk of co-management. For some information see the link below. As example the EU created the RACs (Regional Advisory Committees) where fishermen are the protagonist and scientist invited. Also NGO are participating in co-management. In November 2013 GFCM co-organised a meeting on Mediterranean SSF and one of the topics was co-management (link below). You can also go to the meeting report.

Due to operation of trawler the benthic biodiversity has been fully damaged when compared with pelagic region.

Hello Fatima,

Perhaps our article: "Indications of a climate effect on Mediterranean fisheries" could be useful?

Vangelis

The University of Aix Marseille in France are working on the modelling and monitoring of the Po River in the mediterranean sea in the French coast. But I know they have data from the Italian and the rivers from Spain. A good contact point could be: the Dr. Christian Grenz

 christian.grenz@mio.osupytheas.fr 

best regards

Chère Fatima;

Je pense que le Fauvel (Polychètes errantes et sédentaires) suffira pour faire tes déerminations.

Je les utilisés, ainsi que Bakalem, Rebzani et Grimes et ça a bien marché pour nous....

NB; j'attends toujours que tu m'envoie ta stratégie d'échantillonnage.

Bonne chance

Thank you Tim for the superb answer and for the references. Said.

I do not agree with what Alastair has said, pCO2 depends on pH of the water, it is other way around, pH of the sea water is dependent on pCO2. moreover, blooms can be also limited by CO2 in the oceans if not having constitute CCM. an increase in pH has been observed many times with enhancement in phytoplankton biomass. However, I agree with the last part of your answer. and also what Koji has mentioned. This is possible that for warming or upwelling, significant amount of CO2 is added up to the surface water and there could be simultaneous uptake also by phytoplankton and enhancement of fluorescence. However, the net increase in CO2 could be more and hence positively correlating with the fluorescence. In the Oligotrophic condition under high solar light there can be photo-inhibition leading to net heterotrophy and can may not uptake considerable amount of pCO2. As Koji said, phytoplankton stock is also important.

AHOY Romain, 

I'm currently using biological traits to elucidate -from a functional approach- the composition and distribution of antarctic macrobenthic communities in a glacio-marine fjord.

I've used trophic guilds that includes some traits used by Mcdonald et al.(2010), and others from Paganelli et al.(2012):

My analysis mainly tilts to the trophic function but you can also use life history strategies like King & Mcfarlane (2003) did.

Salute! 

Thank you all, I think that this egg mass are of Murex trapa. This species is very common at Zikim, near the border of Israel and the Gaza Strip.

There are no official hourly records, VMS data of EU vessels is polled at 2 h intervals. However some vessels have AIS (marine traffic above) and you can get access to that data but you may have to pay and you need to know what the vessel is and what it does. In addition there will be many other vessels without either AIS or VMS

Grazie Maurizio. Ho i due lavori che citi, più un'altra decina di segnalazioni apparentemente attendibili, ma tutte anteriori al 1978. Cercavo dati di ritrovamenti più recenti, ma a quanto sembra non ne esistono di posteriori a questa data. 

yes and you can run a query here and put in crustaceans and Mediterranean and you will get all results.

I ran the crustacean Mediterranean query for you.

It is very limited but you will see crustacean output for Greece, Italy, and Spain

Now rerun the query but report with species name and you will see the species are (shrimp prawn). I ran this as well for your. The two queries and the links re attached.

Glycemaris pilosa has 6 varieties some of them coming from the Mediterranean Sea. Please consult - Nolf F. & Swinnen F. (2013) The Glycymerididae (Mollusca: Bivalvia) of the NE Atlantic and the Mediterranean Sea. Neptunea 12(3): 1-35

Hatching success is never one hundred percent and there are so many causes that could disturb incubation...  I would say if the nest looks physicaly intact (not excavated by predator and not eroded) and if there it is not rotten inside at the moment you dig (if only on egg got rotten during incubation it can make the total nest failed), the cause maybe i) environmental condition not suitable for proper incubation (temperature, humidity, pH, compacted sand...) ii) some microscopic factors (fungus, bacteria, pollutant). Among pollutants I won't exclude chemicals from plastics contaminating the beaches. But I don't know if there are published papers on the potential impact of chemicals from plastic on sea turtle eggs and incubation. 

So if the eggs were intacts at the time you dug, according to me you should explore further the environmental (season, rains, flooding of the nest) and microscopic agents. 

Another point : how long did you wait before digging : because sometime bad temp condition can lead to delay in hatching, did you wait long enough before digging the nest ?