Questions related to Cetaceans
Hello everybody. I am a student of Environmental Biology, in Turin (Italy). In October I will graduate, and I am looking for an experience to do after my degree, in the field of Marine Biology (especially Cetaceans). The important points for me are to learn as much as possible, and to practice and improve my English. An additional requirement would be to be able to do this paid experience, or at least without spending money.
Can anyone recommend any institution / association?
Doing my masters project on the possible disruptive impacts that offshore wind farms during operation can have on cetaceans, especially to see if there is any correlation to them being more likely to strand. So in your opinion do you think that the operational noise is a likely factor for cetacean stranding?
I am doing my MSc Thesis about the relationship between maritime traffic and cetaceans' strandings in the Spanish Mediterranean, but it has been really hard to get historical data on the traffic. By now I have a few things but I am looking for any SHP files related to the traffic lines so I can add the information that I already found. Do you know any source?
I am looking for available literature about cetacean and turtle bycatch in the Indonesian gillnet fishery in the Indian Ocean.
Data like quantity and species composition, mortality and discard rate are appreciated.
Thank in advance.
I am doing a review of cetacean diversity in Trinidad and Tobago, West Indies and part of that includes examining available skeletal specimens. I believe this one may be part of a cranium. Can anyone confirm whether it is part of a cetacean skull and help identify it to species? I have included a collage of photos showing different views but have the higher resolution photos as well if that is helpful.
I want to buy a crossbow and darts to get some biopsies on humpback whales. Could you please recommend me a good quality and non-expensive model? Where can I get this?
Thanks in advance for your help.
For my dissertation I need to analyse my data, my supervisor recommended chi squared but I’m not sure if i can use it with my data. I’m looking at occurrences of cetaceans between 2014 and 2017 so the data I have collected is for 4 years and I’m looking at occurrences and time effort put in so they can be compared. So they are comparable I have done averages to see how frequent the sightings are for each year (however these are not whole numbers). i can identify the actual differences with these figures but I need to check if they’re accurate and not just a chance occurrence/number. All the chi squared examples I’ve found are using whole numbers and mine are all values between 0.01 and 1.5 and this doesn’t seem to work.
Move attached my questions so you can see what I’m answering and also the values so you can see what they are and also I’ve numbered them so you can see which ones I’ll be doing together.
Another question, if I’m looking at 3 different species throughout the years but they’re not related, so I put them in the same test? i will be comparing their differences so Im not sure.
Any advice would be greatly appreciated!
I am working with Biomapper to predict cetacean habitat suitability in Indonesian waters. I have tried to run the model with Geographic Coordinate predictors (WGS 1984), but the description of the "Map Documentation" files says "unknown" in "ref. units" and in "resolution" in their Metadata. This likely caused by coordinate system issue. Do I need to project all predictors to UTM? How to decide which UTM zone to be used, if my study area encompasses 6 different zones of UTM?
Thanks for helping.
You may consider to add these papers to your reference list. They document the presence and epidemiology of lobomycosis-like disease in common bottlenose dolphins from the Gulf of Guayaquil.
Van Bressem MF, Van Waerebeek K, Reyes JC, Felix F and
others (2007) A preliminary overview of skin and skeletal
diseases and traumata in small cetaceans from South
American waters. Lat Am J Aquat Mamm 6: 7−42
Van Bressem MF, Simões-Lopes PC, Félix F, Kiszka JJ and others (2015) Epidemiology of lobomycosis-like disease in bottlenose dolphins Tursiops spp. from South America and southern Africa. Dis Aquat Org 117:59-75. https://doi.org/10.3354/dao02932
I have a decade data of cetacean sighting from intended surveys (fix lines) and occasional observation (well-trained fishermen records) consists of 10 species. I would like to estimate their space use using LoCoH.
Since normally LoCoH is used for determining home range with GPS or tracking data for only one species, is it possible to use it to estimate a space use (rather than a home range) of multiple species with sighting data (rather than tracking data)? (In this case, a single-space-use-map for all cetacean species).
It is regularly reported that Common bottlenose dolphin Tursiops truncatus is attacking fish nets off Moroccan and Tunisian Mediterranean coasts causing severe damages to fishermen leading to social issues locally. To our knowledge similar cases of Common bottlenose dolphin depredation wasn't reported in other areas.
We wonder what sustainable measures could be implemented to mitigate depredation impacts? certainly other cetaceans species would have depredation impacts on fishing activities elsewhere.
I already know that blubber is the best tissue to analyze to invastigate on these pollutants.
I was unable to find papers showing results of contaminants in cetacean skin.
The goal of my question is to know if it is relevant to explore that tissue and see if there are some issues in analyzing hydrophobic contaminants in cetacean skin.
Is there any information on strandings (sperm whale or fin whale) in shallow depths in the Mediterranean Sea?
Hello, I am currently volunteering with an association which studies fin whales in the western Mediterranean sea. Specifically, we are willing to collect fin whale's faeces to perform genetic and hormonal analyses. The faeces are a loose aggregation of particles that get attached to the holes of the net and contaminate future samples if we use it more than once (it is almost impossible to clean!). We thought of creating some sort of device that allows us to change the net everytime we collect faeces.
Does anybody know a way to avoid the faeces getting stuck on the net or have created a new one ("home-made" net) to collect faeces? Thank you! :)
I am working in a new Oligocene locality from Ecuador, but the rock seems to be the result of a massive pyroclastic flow, covering the continental shelf and quickly burying all the marine animals (most of them are articulated). I am still conducting the petrographic analysis on the rock samples, but I was wondering if there were more examples of these processes in the fossil record.
Thank you in advance.
This is for the cetaceans populations of Tenerife south, we know many individuals have already been identified, but we couldn´t find an online database, apart from a great facebook page, worth visiting it! Calderones de Canarias.
I' m interested in literature about Al levels in cetaceans organs, especially brain but liver and kidney too.any suggestion? Many thanks stefania
I have run across a number of anecdotes of this growth affecting some Tursiops aduncus bottlenose in/around the Broadwater estuary on the Gold Coast, Australia, around 10-15 years ago (2000-2005). No-one has been able to provide me with pictures. The growth protruding from their mouth made it impossible to accept food from boaters who tried to provision them. Not surprisingly, they disappeared fairly quickly.
I've found one passing reference to a similar condition but the study simply made mention of a male, on its own, with the growth, and didn't study or investigate further.
I'd be interested of any other sightings of such a condition, any thoughts on what it might be, or any photos.
I am extracting hormones from sea lion lipids and most of my samples have solids precipitating out, which I haven't seen with dolphins. I'm wondering if there is some property of sea lion fat that would cause this? I haven't come across a paper that explains what I am seeing. Thanks!
I am preparing a ms dealing with and discussing the above matter and I would very much appreciate your kind cooperation in suggesting/sending papers and other types of information regarding these 2 points:
1. Is the increase in whale watching activities potentially generating higher probabilities of accidents involving humans and cetaceans in the wild?
2. As I am compiling a list of known and published accidents, could you suggest/send your own papers on this subject?
I have attached the picture of the humpback dolphin taken past November in the Persian Gulf as part of my research there. I am not really sure if this type of mark could be caused by a entanglement in a gillnet. Has someone observed something similar in other cetaceans?
East Pacifdic,West Pacific,Southwest Atlantic and Southwest indian ocean subpopulaton were listed as as Critically endangered,Northwest Atlantic leatherbacks were listed as least concern & northwest indian ocean & southeast Atlantic subpopulation were listed as data deficient.
Because until recently many scientist have not fully appreciated how widespread and important fish sounds are in the marine soundscape, I wonder if sounds produced by fishes that are being preyed upon by cetaceans could be mistaken for cetacean sounds in some, probably rare, cases. Fish often only make sounds under particular conditions, such as when attacked by a predator, so you would only hear that sound in that circumstance, hence the possibility of mistaken identification. To be shore most fish sounds have much more limited detection ranges than cetaceans. But shouldn't scientists reporting new sounds at least consider the possibility?
I'm going to take samples of sloughed skin of breeding humpback whale in Perú, to have an idea of what feeding areas they come from. The problem is that only one feeding area has been analyzed isotopically. Is there any chance to have a rough idea of their migratory movements using stable isotopes of C and N, without having analyzed all their feeding areas?
In the study several genetic sex determination methodologies were investigated, compared, and discussed.
Thank you so much!
Considering how abundant / widespread this species is, I am amazed how little research material is available.
I am trying to categorize burst-pulse sounds of dolphins within a data set, and am having trouble figuring out how to determine the pulse repetition rate of a sound. Raven (Cornell software) does not seem to have any instructions on how to do it in their software, but is this something another software can do? Can you count the number of pulses visually? Do I need a code, for example in Matlab? Any help would be greatly appreciated!
The MORSE project aims to understand the extent to which humans have changed the distribution and abundance of marine mammals at the global scale.
We are looking for historical and pre-historical records of presence/abundance of marine mammals through fossils data, historical accounts, whaling/sealing records from 10 000 BP—1950 AD. These records may come from archeological data, historical accounts, or commercial whaling/sealing data.
For the purpose of this study, we need records identified to species-level and with a good certainty regarding location and the time period.