Are Dolphin sightings seasonal or serendipitous?
I walk along Del Monte Beach in Crow City, USA (Monterey, California) quite often.
It is not too rare to see dolphins frolicking (so it seems to me, although they may just be going about their business, with no particular feeling of fancifulness or frivolity as they periodically arch their backs out of the water every several seconds/yards) about 60 feet (estimated) off shore.
However, it seems that either I have been very unlucky lately, or this may be a seasonal occurrence. What used to be common is now "special" - I saw one again last week for the first time in at least several weeks.
Is this because they would tend to be in Monterey Bay only during a certain time of the year (and not in late spring)? Is it based on a prey/predator situation, the temperature of the water, or something like that? Or is it just sort of a "random" circumstance or "happy accident" that I might happen to see them quite a bit for a stretch of time, and then an "unhappy accident" that I miss them for quite awhile (they're there, but I just don't happen to look in the right place at the right time)?
This post was sourced from https://outdoors.stackexchange.com/q/12958. It is licensed under CC BY-SA 3.0.
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My experience relates to Common Dolphin, but likely applies to dolphins of other species, too.
Although dolphin may be seen at any time, you are most likely to see them in proximity to food. So if their prey is migratory, they may follow the prey to some extent; they may also change prey as different fish are available at different times of year.
Here in north-west Scotland, the best time to see dolphin is in Spring, as salmon make their way to their freshwater spawning grounds. The fish gather around the river estuaries, making it a great feeding ground for the cetaceans, especially when the tide is low (making it harder for the salmon to enter the rivers).
Dolphin are sometimes to be found in the vicinity of fish farming operations. The conjecture is that some of the feed escapes the farm cages, drawing in wild fish which feed on it, and that in turn attracts the dolphins. The aquaculturists here don't accuse dolphins of damaging cages as seals do (but that might be simply because they like the dolphins, and don't want to believe that they would force their way in).
In California, you might find that seasonal differences in water temperature affect the availability of prey. Warm water holds less oxygen than cold water, so supports less life throughout. It's possible that "your" dolphins move to a cooler sea when warm currents pass through.
This post was sourced from https://outdoors.stackexchange.com/a/14360. It is licensed under CC BY-SA 3.0.
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