Ocean Rider Seahorse Farm and Tours | Kona Hawaii › Forums › Seahorse Life and Care › Behavior question
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November 19, 2006 at 12:55 am #1005carrieincoloradoMember
My mustang female (I haven\’t decided on names yet!) is usually the pig of the bunch, munching more than anyone else. Tonight she wouldn\’t come to the feeding station, she just stayed hitched in her spot and the only way I got her to snick just one was to target feed her. Could she be hydrating eggs possibly? Do they feel lethargic when doing that?
November 19, 2006 at 2:16 am #3070Saint2966GuestHi Carrie,
Pete is the pro on seahorse behavior, but from experience I can tell you that my mustang female is, as well as the sunburst males, bad to get slow eating. I usually find that if I dont break down and target feed that the next meal becomes a little more enticing. They do have a tendency to slow down on meals, and even hide more often when mating. I have also noticed some being a little persnickity over their preference in food as well. I dont think you need to be too concerned unless she really stops eating. Does she look and act okay apart from this?
Good Luck
CindyNovember 19, 2006 at 2:17 am #3071Saint2966GuestHi Carrie,
Pete is the pro on seahorse behavior, but from experience I can tell you that my mustang female is, as well as the sunburst males, bad to get slow eating. I usually find that if I dont break down and target feed that the next meal becomes a little more enticing. They do have a tendency to slow down on meals, and even hide more often when mating. I have also noticed some being a little persnickity over their preference in food as well. I dont think you need to be too concerned unless she really stops eating. Does she look and act okay apart from this?
Good Luck
CindyNovember 19, 2006 at 2:43 am #3073carrieincoloradoGuestShe looks ok except that she wasn’t interested in food… which isn’t ok. Especially since she was the best eater of the bunch… I’ll just see how she feels tomorrow and go from there..
November 19, 2006 at 5:50 pm #3074Pete GiwojnaGuestDear Carrie:
No, it’s not customary for females to go off their feed when they are hydrating eggs. Seahorses are fractional spawners. Females maintain a spiraling assembly line of developing oocytes (egg cells) at all times, only a portion of which are fully mature and are released at each mating (Vincent, 1990). This differs from the reproductive strategy of most fishes, which are multiple spawners that release all their eggs each time they mate and then start over, maturing an entirely new clutch of eggs from scratch for the next spawning.
The structure of the ovaries is unique to syngnathids. They are paired organs, which join to form a single oviduct (the seahorse’s version of a Fallopian tube) just before the urogential pore (Vincent, 1990). Oocytes spiral out from the center of each ovary, creating a coiled sheet of developing eggs at differing stages of growth (Vincent, 1990). The earliest or primordial eggs arise from the germinal ridge that runs the entire length of the ovary, and lie at the center of the coil from which they spiral out as they develop so that the fully mature eggs are the furthest from the center of rotation (Vincent, 1990). Roughly 20-25% of the outermost eggs in this ovarian assembly line are mature, ready to be discharged during ovulation and deposited with the male (Vincent, 1990). Thus, fully 70-75% of the female’s developing eggs are retained in the ovaries after mating, so a new clutch of eggs will mature relatively quickly and lie in readiness for the next mating cycle.
Seahorse ovaries are always active, busy creating and developing new eggs (oogenesis), forming the yolk (vitellogenesis), and resorbing any mature ova (atresia) leftover after mating or at the end of the breeding season (Vincent, 1990). Eggs in all 4 stages of development can be found in the ovaries throughout the year, so mature females that are actively breeding normally have an excellent appetite. As you can imagine, they need all the calories they can get to keep their ovarian assembly line running smoothly.
So when a mature female goes off her feet, the loss of appetite can be a warning flag. Most often, they will resume their usual ravenous eating habits again by the next meal when they eat lightly for whatever reason during the previous feedings. If not, if your female who is normally such an aggressive eater continues to need coaxing to eat, suspect a problem of some sort. In that case, Carrie, I would check all your water quality parameters and then perform a water change regardless of how the water chemistry checks out to see if that makes a difference. Many times a water change is all that’s necessary to stimulate a flagging appetite.
Best of luck with all your seahorses, Carrie! Here’s hoping your female is soon eating like a horse again!
Respectfully,
Pete GiwojnaNovember 20, 2006 at 12:28 am #3075carrieincoloradoGuestWell, this morning she was back to her old self again and was eating like a horse… 🙂 Yea! I guess I am just a nervous keeper.
There are around 25 babies still alive, they are a week and a day old. Some of them I can see air bubbles inside them, are these all going to die? I made the major mistake of netting them out of the tank when they were a day old because I hadn’t read anything about not doing that until after the fact. 🙁 They are awesome eaters and it is a challenge to keep up with the brine. They only get to eat about 4 times a day at this point because I have to work, but we try to come home for lunch as often as possible to feed them, etc. Since we work for ourselves we have a little more freedom (but loads of responsability!)
November 24, 2006 at 7:21 am #3097Saint2966GuestPete,
If there is no physical reason for slow appetite in eating, Is it behaviorial? My mustang female is the worlds worst to hide when her mate is aggressively trying to get her attention. The water perameters are within range. She doesnt seem ill or even stressed, but does go into hiding when being coaxed. She has never stopped eating, but occassionally has to be tempted out of hiding during meals? When she does show for dinner she gets her belly full and goes back into caves etc. Is she just shy? Or maybe she has a headache:unsure: LOL
seriously though this has always been normal for her. When he isnt dancing she eats great and never hides. Is there something else I should consider or is this just a personality thing?
Thanks CindyNovember 25, 2006 at 5:23 pm #3102Pete GiwojnaGuestDear Cindy:
Yeah, that does sound like a behavioral quirk rather than a physical problem, I environmental concern, or health issue of some sort. Of course, different seahorses do have different personalities and eating behaviors. The individual personalities of seahorses naturally extend to their feeding habits. Some are aggressive feeders that will boldly snatch food from your fingers, while some are shy and secretive, feeding only when they think they’re not being observed. Some like to slurp up Mysis while it’s swirling through the water column, and some will only take Mysis off the bottom of the tank. Some are voracious pigs that greedily scarf up everything in sight, and some are slow, deliberate feeders that painstakingly examine every morsel of Mysis before they accept or reject it. Some eat like horses and some eat like birds.
But it sounds like you’re filly’s appetite only slows down when she is receiving unwanted attention from the stallion and she’s feeling a little persecuted by her persistent paramour. (I’m sure that’s a situation all you young ladies can relate to; surely you’ve all been hit on by someone in which you had no interest whatsoever, and who could never quite accept that fact. Some guys are completely oblivious in that situation, and will keep trying no matter how many times you shoot them down. You know how it goes — sometimes there comes a point where you will go out of your way to avoid this clueless clown whenever you see him coming in an effort to stave off his relentless advances.)
It sounds like your female has reached that point with this particular male, Cindy. Sometimes when their hormones are flowing and they are caught up in a surge of testosterone, an oversexed stallion can become too much to handle for an unreceptive female, particularly when rival males are aggressively competing for mates.
For example, I’ve seen overzealous males swim right over the female, trampling her underfoot in their haste to get at their adversary, and woe to the luckless lady who gets caught in the crossfire between two sparring males (Vincent, 1990). She will certainly be snapped at inadvertently, and may even find herself stuck smack dab in the middle of a tail-wrestling tug-o-war, pulled in opposite directions by her admirers — the same sort of rough treatment Olive Oyl so often received from Popeye and Bluto in the cartoons.
In self-defense, the harassed female often attempts to evade sparring males by darkening and flattening herself against the bottom in submission, or by swimming to the top and suspending high in the water column in order to escape the notice of her pumped-up paramours, since courtship and competition take place on the bottom and seahorses seldom look upwards when grappling with a rival. But in the close confines of the aquarium, it is impossible for a female to escape the attention of her over-sexed suitors for long, and even submissive females sometimes get dragged around the tank by rival males in the heat of combat…
So if she only takes to hiding and goes off her feed a bit when she is trying to stay away from an overeager male, that’s perfectly normal and nothing to be concerned about. One of these days, when she is in the mood, she will respond positively to the advances of one of the males, and everything will work itself out. Once she forms a pair bond with a particular male, her sporadic hiding should cease to be a problem.
Best of luck with your seagoing Casanovas, Cindy!
Happy Trails!
Pete Giwojna -
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