Questions related to Fish Morphology
I would like to ask whether I can find an original description of a fish species from the author who first found it.
For example, Pangasius hypophthalmus (Sauvage, 1878), where can I find the morphological description of P. hypophthalmus by Sauvage?
Thank you very much for your responses.
During determining the geometric morphometrics using TRUSS network, the size effect has been removed either by applying different formulas or by superimposition in the literature. Which one of the both is better option to use. For superimposition which software is better to use. Thank you!
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 tiny scales.
BTW. I have tried to look in binocular but could not see anything :(
Thank you in advance,
Otherwise I am hopeless :(
Normally freshwater fish meristic character of fin ray counts example dorsal fin or caudal fin rays count variability of same within species it possible or not if possible why it occurred.
I saw the formula above the question, but I can't understand in detail, any one can explain in detail above the formula along with how to analysis with statistical software example using EXCEL or any other software is there pls explain...
I would like to know what are the most important fishing ports in Mexico. Ideally, the information would be broken down into commercial, sport, and recreational. In particular, I am looking into fish landings, number of vessels, etc.
I was hoping to find some published piece of literature; however, so far I have had no luck.
Any assistance would be greatly appreciated.
For urine sampling and estimation of urine storage in a cichlid from the lake Malawi, maylandia zebra, I want to prevent urination for a certain laps of time (1 or 2 hours). In Tilapia, species with a micro-penis, the author tie the uro-genital papilla. But Maylandi don't have the same thing. Do you think that a biological surgical glue would work ? And do someone use them on fish even for surgical applications ?
Thank you very much
I am working on fish bacteriology band presently facing problems in analysis of SEM photographs
I need to identify the type of fish caught from fish images. How can I locate anchor points/landmark points to extract features from the image?
Namely, I want to locate eye position, dorsal and pelvic fin. Need to get Fish mouth length, Dorsal and Caudal fin length.
Right now I am trying with SIFT method to get key points.
Can someone suggest me how can I get the specific key points?
I need to identify ornamented fish bone elements. The ornamentation is glossy like ganoin, in thick and wide, longitudinal striae on the outer surface of the bones. The bones themselves are similar to fin rays, however, I am not sure.
During a research regarding the influence of salinity on Cyprinus carpio (checked metabolic rate on 2 different exposures 10ppt NaCl and 10 ppt Seasalt) we noticed that during the exposure of NaCl a lot of the carp lost scales on and near the lateral line. We think this has to do with the trans epithelial excretion of NaCl, but can't seem to find any literature about this. Can someone help?
I am nearly finished my book on the dangerous fishes of the east and southern Arabian Peninsula.
For this book, I need to put images for the species dealt with in the book. The total number of fish species mentioned in the book is 134. I managed to get 85 images and I need to get the remaining 49 images.
The book will be published by an international publishing house.
I would be much grateful for anyone has images for any of the species mentioned in the following list and would like to send to me to include it in my book. All images will acknowledged.
Images from the fish markets, landing sites and studio are all welcome.
List of fish species/ images required
1. Stegostoma fasciatum
2. Nebrius ferrugineus
3. Carcharhinus amblyrhynchoides
4. Carcharhinus amblyrhynchos
5. Carcharhinus galapagensis
6. Eusphyra blochii
7. Heterodontus omanensis
8. Heterodontus ramalheira
9. Anoxypristis cuspidata
10. Pristis pectinata
11. Pristis zijsron
12. Gymnothorax flavoculus
13. Gymnothorax griseus
14. Gymnothorax herrei
15. Gymnothorax megaspilus
16. Gymnothorax phasmatodes
17. Myrichthys colubrinus
18. Sphyraena acutipinnis
19. Sphyraena flavicauda
20. Sphyraena qenie
21. Canthidermis macrolepis
22. Melichthys indicus
23. Rhinecanthus assasi
24. Eupleurogrammus glossodon
25. Eupleurogrammus muticus
26. Strongylura strongylura
27. Tylosurus choram
28. Acanthurus leucosternon
29. Acanthurus tennentii
30. Naso fageni
31. Heteronarce mollis
32. Torpedo adenensis
33. Torpedo marmorata
34. Torpedo panthera
35. Torpedo sinuspersici
36. Anodontostoma chacunda
37. Dussumieria acuta
38. Thryssa hamiltonii
39. Ruvettus pretiosus
40. Cyclichthys orbicularis
41. Silurus glanis
42. Colletteichthys dussumieri
43. Bifax lacinia
44. Pardachirus marmoratus
45. Himantura imbricata
46. Himantura jenkinsii
47. Aetobatus ocellatus
48. Netuma thalassina
49. Scorpaenodes evides
LAITH A. JAWAD
I know about the paper of Divay and Murray 2015, which figures a vert of P. omiscomaycus, but I need other papers for comparative methods.
I am working on research involving parasitic lamprey feeding, and want to look at if characteristics of a fish's lateral line system could make a parasitic lamprey more/less likely to attack the fish.
I will be very happy if you could provide some refferences for me
This is for the use of scales associated with fish remains in stomach contents to identify prey beyond just "unidentified fish."
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.
I try to derive mathematical models for fish sizing using single/stereo imaging techniques. The challenge in this work is how to calculate the depth of the object in the fish tank. I'll be appreciated if somebody has an idea about depth calculation.
Currently, I'm working on golden spotted mudskipper (Periophthalmus chrysospilos) and found that M/K =2.6. Is this value is still acceptable? the suggested value of M/K should be in the range of 1 to 2.5 (Beverton & Holt, 1957).
if not what might be the suggestion for me to fix this?
Does the size of fish, or other animals for that matter, affect their ability to feel pain?
The issue of whether fish feel pain flares up now and then with animal rights campaigns, especially around recreational fishing. It affects views on the acceptability of practices like game fishing and catch-and-release fisheries. A recent review (Rose et al., 2014; Fish and Fisheries, 15, 97–133) concluded fish were unlikely to feel pain. But this largely reviewed research on fish the size of carp and trout or smaller.
The issue has flared up in my home state (Tasmania, Australia) around game fishing for swordfish, which has involved a small number (<20) of very large (~200kg) animals. This has become a modestly political issue, yet the extensive recreational fishing of other species like trout appears to be viewed as being completely acceptable. The only obvious difference is the size of the fish. So, is there any scientific basis to believe larger animals are more likely than small animals to have the suite of nociceptors and cortical development necessary to feel pain?
I'm working on age of snapper using otolith, as I came across some articles some workers back-calculate and others did not.
Can anyone provide reliable information on species pairs (fishes are preferable) that have clear differences in morphological characters but show a little or no difference on the DNA level?
Species names in Latin would be nice.
References would be great.
So, as many of you are probably aware, there are several living groups of fish which are able to use electroreception to some degree to either passively sense the world around them or, in some cases, actually stun or kill other animals. In particular, I'm thinking of members of the Gymnotiformes (including the electric eel), the electric catfish (Malapteruridae), the torpedo rays (Torpediniformes) and several families of the Osteoglossiformes (Mormyridae and Gymnarchidae).
I was wondering if anyone knew of any evidence that a now totally-extinct group of fish may have possessed similar electroreceptive/generative abilities (that is to actually generate electric fields, rather than sense them as in sharks or paddlefish). I know that in South American knifefish (Gymnotiformes), the development of an electricity-generating system has strongly constrained the development of their locomotion, which makes me wonder whether a similar morphology among extinct fish (say, xenacanth sharks) might be indicative of such behavior.
I'm looking to find the type specimens, if they still exist, for two species of skate found in the northwest Atlantic (Canada, US): Leucoraja ocellata Mitchill, 1815 (winter skate) and Leucoraja erinacea Mitchill, 1825 (little skate). Both were originally described in the genus Raja.
I am trying to image fish at 5 days but I am finding it difficult to position them into agar grooves without them floating away. I have tried decreasing the temperature and kept them at a lower temperature after 4 days and that delayed their development so they did not develop a swim bladder problem but some of them also developed edema. However, as I want to test them with compounds at 4dpf for 24 hours, I want the larvae to be healthy. Any suggestions would be welcome.