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View Diary: Marine Life Series: Dad Loves His Work (25 comments)

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  •  Some questions for SH2: (1+ / 0-)
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    CSI Bentonville
    1. Do seahorses travel long distances for food? Or do they stay in one territory generally?
    1. Do they travel in large schools or are they more solitary? (You noted that babies can be eaten by other seahorses and that makes me think they more likely are found in small groups or are solitary?)
    1. Are there any venomous species? I know you will discuss protective behaviors next, but I am interested in this.

    I actually have lots of questions but I'll wait to see if they're answered next time. (But about determining sex of seahorses: have you noticed whether there are equal numbers of males and females by adulthood, or are there  greater numbers of one sex than another and if the latter is so might that affect whether some seahorses might switch?--Also, could seahorses, along with other fish, change sex if waters are polluted with all the hormone runoff?)

    Well at least I can subscribe to keep up with the series. Thanks again.

    In 2006, the Congress; in 2008, the White House; in between, out of Iraq.

    by Nina on Fri Nov 24, 2006 at 05:32:54 PM PST

    •  Looks like SH2 is running away with this one (2+ / 0-)
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      barbwires, CSI Bentonville

      I'll answer most of these next friday, but some quick answers here:

      1. Males have a very limited territory. Females travel a bit, but not too far from the male. Both migrate into deeper water in winter and back again in the spring.
      1. Strictly in pairs, however in really good habitats (like dense eelgrass beds in calm bays)the habitats will overlap.
      1. No venomous or poisonous (to eat) species. They rely mainly on camouflage and the hard outer skin (more on this later) for protection. If captured by a crab or seagull they are defenseless.

      I find more females than males, but this could be because the female wanders so she is more likely to be caught.

      Also, because of the stress of nourishing the eggs, the males are more prone to disease in captivity so are much harder to keep healthy.

      Also, this is all based on my local species. I'm not as familiar with tropical ones so behaviors may vary with different species.

    •  oh, and... (1+ / 0-)
      Recommended by:
      CSI Bentonville

      They never switch sex. As far as pollution goes, they are not tolerant of it at all so I would say they would perish before anything could effect them enough to switch sex. These are very delicate animals.

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