Questions related to Marine Mammal Ecology
On the 9th of November I believe I was lucky enough to observe two sub-adult Blue Whale’s (Balaenoptera musculus) in the North East Atlantic off the coast of the United Kingdom; however, I am questioning my identification due to the odd location and shallow water ca. 70m.
The key identifying features are as follows; large baleen whale likely sub-adult at ca. 20-25m length; tall columnar blow ca. 6-8m; distinctive miniature dorsal fin located towards posterior; mottled grey colouration; large blow hole splash guards; very thick caudal peduncle; typical slow surface roll with long back only exposing dorsal fin at the very end of roll arching tail stock prior to longer dives. Please take a look at the attached photos and let me know your thoughts.
Any help would be greeted with the utmost appreciation.
All the very best,
- 2.62 MBSurface 1 Back.jpg
- 2.85 MBSurface 1 Dorsal Fin.jpg
- 6.56 MBSurface 2 Back1.jpg
- 4.95 MBSurface 2 Back2.jpg
- 3.10 MBSurface 2 Blow.jpg
- 2.85 MBSurface 2 Dorsal Fin.jpg
- 3.72 MBSurface 2 Rostrum.jpg
- 3.29 MBSurface 3 Splash Guard1.jpg
- 2.27 MBSurface 3 Splash Guard2.jpg
- 3.08 MBSurface 4 Caudal Peduncle & Dorsal Fin.jpg
I am looking for incidents of this behavior in the literature, or from government agency reports. Links and citations would be most helpful.
I am reviewing available scientific literature in search of studies detailing energetic and resource requirements for sperm whales in particular tidal volumes, vital capacity (Stahl 1976) and oxygen extraction efficiency among the others. From my dataset, I can easily obtain individual body-length and derive theoretical animal mass and surface area. Together with other data collected in the field I am trying to look into relations between field metabolic rate, body characteristics and energetic requirements for sperm whale. While I can find several references for many Mysticete species I haven’t found so far any relevant paper on sperm whale describing the above mentioned parameters. Do you have any suggestion on this matter?
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Thanks in advance guys!!
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This question pertains to; animal dialects, and social (cultural) transmission of vocal learning. Examples can be about any mammalian species.
PCFG has feeding grounds (based on photo identification) from northern California to below the Aleutian Islands and has a population of about 200 whales.
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Can any body have the morphometry difference for these sub species and hybrids of blue whale?
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I can clearly see that one of the diseases is occurring more frequently, but I do not know how to put it statistically. I ran chi-square cross tabs on the cause of death versus the facility size, the sex, as well as the origin. I don't know what to make of it.
Here's a link to the data I am using
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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 propeller as it looks like that there are marks on the body. Has someone observed something similar in other dolphins?
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?
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