Can you help me to identify these fish remains?

More Oleksandr Kovalchuk's questions See All

Distribution map of the Brown Trout (Salmo trutta)?

Please send me the link on distribution map of Brown trout (Salmo trutta) and other related species, native for the Europe and Asia.

01 February 2016 7,135 12 View

Can anyone send me a photo of suboperculare belonging to Huso huso?

Dear colleagues! I will be very thankful for sending the photo(-s) of subopercular bone, as well as other cranial bones and pectoral spine of Huso huso.

01 February 2016 3,848 3 View

Can anyone send me a photo of the complete skeleton of common bream (Abramis brama)?

I will be very thankful to anyone who can send such a photo to me. It would be great to have an assembled (mounted) skeleton of this species.

31 December 2015 2,010 4 View

Which bones and their mophological features are diagnostic for the species differentiation of the genus Silurus?

Now I'm working on catfish remains from the late Miocene and Pliocene strata of Ukraine. Most of them belongs to the genus Silurus. However, in some cases I can not distinguish it at the species...

08 September 2015 1,501 4 View

Does anybody have photos of the opercuar bones of Hucho hucho and/or Hucho taimen?

Dear all, I will be very grateful for sending photos or images, illustrating opercular bones of Hucho hucho and Hucho taimen. Maybe, these images were presented elsewhere in publications?

03 April 2015 5,430 3 View

Can you help me with measurements of isolated pharyngeal teeth of the Scardinius genus?

Can you help me with pharyngeal tooth measurements of representatives of the Scardinius genus (S. acarnanicus, S. graecus, S. dergle, S. knezevici, S. plotizza, S. racovitzai, S. scardafa, and S....

04 May 2014 3,104 2 View

Is it necessary to take part in conferences?

Conferences and other scientific meetings (especially international ones) are often an expensive pleasure, in particular for researchers without any grants. Is it so necessary to take part in such...

01 January 1970 6,926 13 View

Can somebody recommend me a study in which LGM climate of Anatolia and European Thrace are compared?

Can somebody recommend me a study in which LGM climate of Anatolia and European Thrace are compared? And, as well, after-LGM climate and, as well, vegetation?

01 January 1970 2,150 5 View

What research topics in freshwater aquaculture recently are the most promising worldwide?

I'm very interested to obtain information about current state and further development of freshwater aquaculture (trends, topics, main problems, etc.). I will be very thankful for any ideas...

01 January 1970 9,775 26 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

Good morning research fellows, Has anyone worked with senna alata plant extract on any kind of fish?

Literatures on the piscicidal effect of sennaa alata is scanty. if you have any related litrature either in the bark, leaves or roots used as treatment to any aquatic organism please kindly help...

28 February 2021 9,138 2 View

Experimental Design: How deal with pseudreplicates with immunological and clinical-chemical paramaeters?

Hello everybody, I am investigating the influence of a toxinon various clinical-chemical and haematological parameters in fish. I have three treatments (control, low dose, high dose) in my...

24 February 2021 1,243 1 View

Hi i want to ask that in order to find out LC 50 (96 hours) of particular toxin for fish. Should we keep the animals with food or without food?

if we expose the fish after acclimatization to particular toxin in order to find out LC 50 (96 hours).Should we keep the fish off feed or with feed for that duration. Some literature show that...

24 February 2021 357 2 View

Measuring Total immunoglobulin whole-body of fish larvae?

Hi Dear All, I prepared the extract of fish larvae whole body with PBS. Then protein concentration of the whole-body extraction samples determined by the Folin-Ceiocalteu-Phenol method (Lowry...

17 February 2021 1,971 3 View

What is the identity of additional bands found during fish gut microbiome 16S V4 PCR amplification?

Hi, I am carrying out test PCRs for 16S amplicon sequencing on Illumina MiSeq. I am using standard V4 primers: 515F/806R. The aim is to profile the microbiome of fish guts under different...

16 February 2021 5,668 6 View

Is this the fragment of a sauropod tooth?

Dear colleagues. Fragments of this species are very rare from a terrestrial Lower Cretaceous locality from Germany. Up to now from this locality sauropods could not be proved with certainty. Other...

14 February 2021 2,310 1 View

Problem to dissolve 50%wt Glycerol in 4%wt PVOH 28-99 ??

Hello everyone, I am trying to prepare a solution out of PVA(Polyvinyl alcohol)_Glycerol_Wasser . (4% PVA 28-99 and 50% Glycerin) To prepare this solution I first add PVA to 80degree water and...

06 February 2021 2,300 3 View

How to remove inter-year variation from my assessment of seasonal variation?

I have a 30 year dataset of fish sampling. I know from previous analyses that there is a huge amount of variation between years in catch rates. What I would like to do is create a plot that shows...

01 February 2021 3,980 5 View

Does someone know which structure could exit the olfactory bulbs at their antero-dorsal top ?

Hi people, I am studying bat brains through endocranial casts and I cannot identify which structure could be present in sort of a canal located dorsally to the cribriform plate. It is like...

27 January 2021 797 6 View

David Salinas Torres

Hello. By the morphology of these teeth and seeing a couple of articles, if I agree with you that this is a sparidae fish, not so much of a cyprinid fish. I send you the articles I consulted. Cheers

Oleksandr Kovalchuk

Thank You very much!

Alan Philip Garfinkel

I would contact Robert Yohe or Ken Gobalet at California State University, Bakersfield.

M. R. Mozafari

Hi,

You may find my fossil collections interesting. Attached pls find some specimen, seemingly fish fossils.