Posts Tagged ‘installment’

The Post – What to Feed the Babies and How Salty Should the Water Be?

March 1, 2008

Just a reminder that coming up over the next week, the next few installments on the journey of my Under the Pier novel. I had to take a break from those for taxes, actually finishing some more chapter revisions, and of course, taking care of the “grandchildren.” But stay tuned. More to come on Under the Pier.

Re the grandchildren:

What wonderful goings on! Soooo many little black dots in the nursery and they are definitely swimming around. Many are hiding out in the shadows of the live rock caves. So tiny and already they know to hide and avoid “predators.”

I am feeding them three times a day with a mixture of ground up mini-freeze dried krill, some ground up flake food, a few drops of the liquid Small Fry baby fish food, and a little distilled water mixed in. We shall see how it goes. And no, I am not grinding the mini-krill with my husband’s lovely stone mortar and pestle that he uses for grinding up herbs and spices in the kitchen!!

Regarding salinity – it’s a tricky call. While Uca minax, which are the type of fiddler crabs I have, are seen furthest up the estuary in areas of lowest salinity, there seems to be evidence that for at least the first two weeks of their larval development (zoeae) , they actually survive and do better at a higher salinity. However there is also evidence that for the next (megalopae) stage to metamorphose into crab Stage 1, this species does best with the lower salinity seen in the upper estuary environment that the adults live in. I will post more information tomorrow including the links to the two papers I found today on this subject. Long story short today though, is that zoeae of all the species of fiddler crabs, seem to need a couple weeks of “being at sea,” hence higher salinity.

I’ll also explain about the three species used in one of the studies and how their selectivity for salinity levels puts them in different spots in the estuaries and thus probably keeps them from competing with each other for resources and food.

Also to come – I dug out the small microscope I had as a kid and will pick up some microscope slides. So to follow, descriptions of babies, under the glass.

A couple of other notes – courtesy again of my engineer husband. He noted a bunch of white things all over the gravel and wondered if the babies had already molted. Maybe they have but these white dots were too big and irregular in size for baby shells. I believe it’s salt crystals that didn’t dissolve in the water before I added it. I added more water to bring the salinity up closer to a marine environment. I started at 1.010 (brackish) when they were born and over the course of yesterday raised the salinity first to 1.012, then by last night 1.015. Today I’ll finish raising it to 1.020. Then in two weeks I’ll bring it back down to 1.010-1.012, the optimal range for Uca minax adults.

Sand. Again, my husband was watching the babies swim – it is amazing to see these tiny things whiz around the tank – but he shined a light to see if they would follow the beam. The article I posted in yesterday’s gift mentioned that the babies will go to the light. My husband didn’t see evidence of that, but what he noted was that many little babies had worked their way down between the gravel bits, all the way down to the bottom of the tank. Unless they figure out how to get back up to the water, they’ve had it. Now let’s face it. Their parents had a brain the size of a pinpoint. How large a brain do you thing babies the size of a pinpoint have? So the odds of them getting back to the surface are not good. I said “evolution at work. Anybody who tunnels down in the gravel probably won’t live to reproduce. ” My husband noted that gravel is less than optimal for this (engineers talk like this by the way, things are optimal, less than optimal, sub-optimal 🙂 ).

The real important point though was his next comment: “The NEXT time we do this, we should use sand.” There you have it folks. My husband has fallen in love with the fiddler crabs. In all truth, he has. He watches them, thinks about how to make their lives better, anticipates the babies getting ground up in the water filter…..those babies are lucky to have him!!!

Anyway, stay tuned for the links on those two articles about optimal (yes, OPTIMAL) salinity levels for fiddler crab larvae.

 

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The Post – Nursery Update, Ethics, Parenthood, Friendship, and Just Being a Mere Mortal

February 25, 2008

Just a quick note this morning as I’m on the run. The next installment of my author journey is partially written. Those take me a bit more time. Pondering, reflecting, remembering. Lots to sift through. So those will resume this week.

For now, just to update – Scarlett O’Hara is still alive in the new tank – the “nursery.” Frankly, I was worried. I’d have felt better if I’d set that tank up last week and it had a week to run and settle out. I just hadn’t come to the point of “embracing” trying to raise larval crabs and when I did finally decide this weekend to try, it seemed like birth was imminent. Kind of a go/no-go response needed to be made ASAP.

Last night she just wouldn’t settle down in the new tank. Kept running back and forth, kept trying to climb the sides of the tank. Was there something wrong with the water that was hurting her? All the parameters looked great, in fact the water in the new tank was better than the original – that one’s overdue for a water exchange and the nitrites and nitrates in that tank are rising. So this one is actually healthier. However, certainly there’s other parameters I can’t measure. So my worry was that I’d put her in something I thought was better for her, but maybe I was killing her and couldn’t tell?

I wondered if she was just disoriented and couldn’t find a place to climb out of the water to get air. I noticed air bubbles escaping from her mouth at one point and was afraid she would “drown.” She has this lovely live rock with all kinds of crevices she could hide in, better than her old live rock, AND it’s much bigger so she can climb on top of it, but I thought that maybe in her stress she couldn’t find it. So I scooped extra gravel out of the original tank and put it in the new one and built her two gravel hills so she could walk up the hill and be partly out of water. She found them, but that didn’t seem to be the problem. She just kept running back and forth and climbing the walls.

My husband wondered if she simply couldn’t understand why the sides of this tank were so clean and where was all the microscopic algae she likes to eat? The other tank, though the glass sides look clear, apparently have microscopic algae on them because the crabs are always “picking stuff off” the sides and eating it.

Or maybe she was just so stressed out, she couldn’t relax and would kill herself with exhaustion?

I also noted last night that the formerly clear water in the new tank was now cloudy. I was convinced something awful was taking hold and maybe the live rock had something bad in it. If so, you would expect the nitrites to be rising. I repeated all parameters last night and the water looked good.

So by this point, who is more stressed? Her or me?

My husband said little, just said “It’ll be what it’ll be. You’ve done all you can.” I told him it’s not easy being “God.” He patted my back and said “At least not a God who cares.”

Anyway, I struggled with “should I just bag this whole thing and put her back in the original tank?” I decided not to add any more stress to her by moving her back. One of those – just let it go and see what happens, moments.

This morning the tank looks less cloudy. My husband said he came down and she was sitting quietly in the water, “tending” to her egg mass – ie – giving it pushes and pokes, as if turning them. When I came down, she had found her way to the top of the live rock and was just sitting there on top of her world, soaking up heat from the lights and appearing totally relaxed. (Or is she dead? Should I poke her? 🙂 Just kidding).

All joking aside about my being so worried, I guess I felt guilty. As I said to my husband – Did I put her at risk of dying because I so wanted to try and raise the babies? Did my ego cause harm in this and should I have just left it all alone?

The ethical questions are never clear or easily answered. It’s like being a parent. You try your best, knowing that even when you do, you don’t know if you’ve made the right choices. And in your less than perfect moments, and we all have them, you wonder, will they be okay? Why does God entrust such a big job to mere mortals?

I think Lee Woodruff’s final comments in her book, In An Instant, apply here, at least for being parents, maybe not for being God to fiddler crabs. She worried about how her kids were affected by all the turmoil and intensity when her reporter husband, Bob, was in the hospital with a head injury. She had to be away for long periods to be with him. Things were in an upheaval even though family and friends were looking after things. I so loved her observations, because they are the truth. In thanking her kids she added:

“May you always remember that there are no perfect parents, just mothers and fathers doing the very best they can. And there are no perfect spouses either, just those who love each other enough to stand by “for better or worse.” Don’t be fooled: that kind of endurance is, perhaps, the greatest expression of love.”

I think she could only come to that lesson because of the messiness of life. I think it’s the messy low moments that teach us the most about being human, and about understanding the “human moments” in others. Those times teach us about being compassionate to ourselves and to others, especially when life is at its least pretty. We all want to look like we’ve got it together. Sometimes we do. Sometimes we don’t. Life gets messy. Thomas Moore, a former Catholic monk, in his book, Care of the Soul, I book I read, reread, dog-ear, highlight…in three different colors, quotes something from the Renaissance humanist Erasmus, that applies. Erasmus wrote in his book, The Praise of Folly, that “people are joined in friendship through their foolishness. Community cannot be sustained at too high a level. It thrives in the valleys of the soul rather than in the heights of spirit.”

So, from one very imperfect human, friend, wife, mother, fiddler crab God, go gently into your Monday. It’s really okay, no matter how it goes.