Re: [GSAS-Member] Safe in Tank Acrylic Sandpaper

["matt kaufman" <igotadose@hotmail.com>]

> From: haika@drizzle.com
> Reply-To: Greater Seattle Aquarium Society member 
> chat<gsas-member@thekrib.com>
> To: "Greater Seattle Aquarium Society member chat" 
> <gsas-member@thekrib.com>
> CC: gsas-member@thekrib.com
> Subject: Re: [GSAS-Member] Safe in Tank Acrylic Sandpaper
> Date: Wed, 6 Apr 2005 09:33:36 -0700 (PDT)
>
> > Are there any old fish in the wild?)
>
> If an age of 100+ can be defined as 'old'...yes, we encounter them on a
> routine basis. Of course, I'm talking about fish in a marine ecosystem
> rather than freshwater. Dover sole, sablefish (black cod), and several
> rockfish (Sebastes) spp routinely exceed 60 years of age. Our lab has
> validated these age estimates with radiometric analysis. Just last week I
> looked at an otolith preparation from a rougheye rockfish that we
> estimated was 100+ years old (I got 101, another age reader got 104). We
> are preparing a thin-section of this otolith just to cross-check our
> estimate.
>
> Betty Goetz

O.K. I should've been more specific. Old freshwater fish that we would could 
reasonably expect success with, in a home aquarium environment. This rules 
out sturgeon, lungfish (can be kept as pets but not yet bred in captivity, 
which is my partial criteria for success.)

Old doesn't mean years- most killifish live for several years in captivity, 
including some of the so-called annual killifish whose lives are as long as 
the duration between the rainy season and the dry season in their native 
habitats. So, a 1.5 year old Cynolebias (have had those myself) are 50% 
older than they'd expect to be in nature.

Matt

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