What does forehead width mean in fish morphometrics?

More Tatia Kuljanishvili's questions See All

Is there any rule how to write down fish measurements and how to abbreviate them?

In different literature, the same measurements of the fish are written differently, with different abbreviations. For example: Body depth or body height Anal fin length or anal fin height I...

11 December 2018 5,100 0 View

What does Nōmen est ōmen mean?

Please, anyone explain what does Nōmen est ōmen mean? It was mentioned in Plauto's composition El Persa. Slave is telling his owner "Nōmen est ōmen" to buy a new slave which is expensive, and...

10 November 2018 570 2 View

How do you count scales in lateral line in Nemacheilidae fish?

Dear researchers, I need your help! Here I am attaching picture of tiny Oxynoemacheilus sp. I was wondering how is it possible to count number of scales in Lateral line when fish has got such...

10 November 2018 9,852 15 View

What are the motives for introduction?

Hello dear researchers, I was wondering, what kind of motivations for introduction of new species, have you heard/read of? (I don't count most frequent cases like aquaculture, trade or ornamental...

09 October 2018 7,080 16 View

How many trunk rings does Syngnathus sp. have in these pictures?

Hello dear researchers, I am trying to morphologically identify Syngnathus spice from Syngnathidae family. Everything fits to S. acus, however number of trunk rings in case of S. acus is 17 but...

08 September 2018 8,702 9 View

Do you know how to test the significant difference between 2 regression slopes by using R?

In my case: N1=86 N2=229 b1=2.12 b2=3.14

02 March 2016 4,173 11 View

Risk assessment of one specie introduced from saltwater to freshwaters

Hello, I need professional help. Is it possible to make a risk assessment of the fish, which is marine, and translocated to fresh waters, within the same country? preliminary, I performed...

01 January 1970 3,468 3 View

Is counting otoliths anuall rings for C. gibelio more accurate than its scales counting?

Dear Researchers, I'am estimating the age of Carassius gibelio individuals by counting the scale rings. However I found it difficult to estimate the age of young individuals (less than 15 cm). Are...

01 January 1970 5,961 5 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

Stability of the Solar System: Insights from Einstein’s Equations ?

The stability of the Solar System is a complex subject that blends the classical framework of Newtonian mechanics with the modern insights provided by General Relativity (GR). Understanding this...

07 August 2024 2,569 1 View

How to quantify polystyrene microplastic (8 micron) bioaccumulation in fish tissue?

"I have treated adult zebrafish with 8-micron polystyrene microplastic and want to study the bioaccumulation in different organs. Can this be done using hydrogen peroxide digestion followed by...

05 August 2024 853 3 View

Can't spin-orbit coupling(SOC) be included in optical properties calculation in CASTEP?

I am currently using CASTEP version 2020. When I want to run optical properties calculations with spin-orbit coupling(SOC), I encounter the following error in a pop-up window before the job gets...

02 August 2024 2,890 0 View

Do anyone knows any book dealing with fish growth/zootechnical performances and somatic indexes in aquaculture?

In the aquaculture and fish nutrition research field, a number of growth and somatic indexes are often used, including specific growth rate (SGR), feed conversion rate (FCR), protein efficiency...

22 July 2024 2,480 4 View

Why do fish have fishy odors naturally ?

Chemical Engineering /Food Engineering

20 July 2024 4,152 4 View

Every star like the sun is at a stationary position. Am I right?

The earth has a orbit, but not for the sun. Similarly, all planets have orbits, but not for stars like the sun.

18 July 2024 1,768 4 View

The criterion about maximally localized wannier function?

I heard that as the value of "num_iter(tag in wannier 90)" is higher, spread of Wannier function(=WF) is gradually lower in wannier 90. If so, is this procedure that minimize the spread of WF...

13 July 2024 4,608 0 View

Chromosomal spreads are shrunken after fluorescence in situ hybridization (FISH), why?

Dear colleagues, We are trying to do FISH on mice PDEC metaphase spreads. We use homemade biotin labelled probes, synthetized using a nick translation kit. For hybridization, initially we were...

08 July 2024 8,687 3 View

Determination of fatty acids in fish?

I measured the fatty acids in the fish, using the internal standard method in the national standard method, I first extracted the fish oil with cable extraction, please ask me how many grams of...

02 July 2024 900 1 View