Hi Harry, thanks for the info. My intent was mentioning two places
where large sized populations occur, where ecological factors
facilitate consistently reaching large sizes, as in Jim Brunner's
population. Larger size shells appear to correlate with healthy salt
marshes.
For more on the ecology of this species and insight into how they can
get so large (or dense, population-wise the following paper and some
of the papers cited within are quite interesting as there is
facultative symbiosis between Spartina and mussels:
Ribbed Mussels and Spartina Alterniflora Production in a New England Salt Marsh
Author(s): Mark D. Bertness
Source: Ecology, Vol. 65, No. 6 (Dec., 1984), pp. 1794-1807
Published by: Ecological Society of America
Stable URL: http://www.jstor.org/stable/1937776
On 8/6/15, Harry Lee <[log in to unmask]> wrote:
> Steve,
>
> Your LI, NY shells exceed the 117.6 mm specimen I measured for the
> Jacksonville Museum of Science and History (MOSH). It was listed as a
> WRS in the final edition of the American compendium of such records
> (Pisor, 2008): 183.
>
> However, Huber (2010: 118) lists a 133 mm specimen. I have found that
> Markus scrupulously seeks out such giants and his works, including
> Huber (2015), are a valuable and trustworthy resource for pelecypod WRS.
>
> Nonetheless, it sounds like you've got a prodigious specimen.
>
> Harry
>
> Huber, M., 2010. Compendium of bivalves. A full-color guide to
> 3,300 of the world's marine bivalves. A status on Bivalvia after
> 250 years of research. ConchBooks, Hackenheim, Germany. 901 pp.,
> incl. numerous color figs + CD-ROM. August.
> Huber, M., 2015. Compendium of Bivalves 2. A Full-Color Guide to the
> Remaining Seven Families. A Systematic Listing of 8'500 Bivalve
> Species and 10'500 Synonyms. ConchBooks, Hackenheim, Germany. 907
> pp., incl. numerous color figs + CD-ROM. May.
> Pisor, D.L. [D.L. Pisor and G.T. Poppe, eds.], 2008. Registry of
> world record size shells Fifth edition. Pisor Marine Enterprise,
> Inc., San Diego, CA and Conchbooks, Hackenheim, Germany. Pp. 1-[208].
> March.
>
> PS Your/Leslie's TX shells exceed the Huber (Idem) listing of 118.2 mm. HGL
>
>
> At 10:17 PM 8/5/2015, steve rosenthal wrote:
>>more regarding sizes of ribbed mussels....
>>
>>All the specimens I have seen from the west coast of FL (Sanibel area)
>> were quite small.
>>
>>I have local (New York) specimens of G. demissa that are just over
>>126mm, from a local salt marsh on the south shore of Long Island
>>where they grow quite large.
>>
>>Les Crnkovic took me to an area in Galveston TX for large granosissima
>>about two years ago, we got a few as big as 127.3mm that day; Les may
>>have larger specimens from prior years there.
>>
>>
>>On 8/5/15, Jim Brunner <[log in to unmask]> wrote:
>> > Marlo, Harry, et alia,
>> >
>> > G. granosissima gets quite large in NW Florida. Three specimens on
>> > hand
>> > from brackish waters in North Bay (St Andrews Bay complex) P.C.,
>> > Florida
>> > measure 88.5, 83.8, 73.8mm. I believe when I collected them some 15
>> > years
>> > ago that I saw some larger but rejected them because of the erosion on
>> > the
>> > jumbo area.
>> >
>> > Jim Brunner
>> >> On Jul 30, 2015, at 2:03 PM, marlo krisberg
>> >> <[log in to unmask]> wrote:
>> >>
>> >> See discussion and photos:
>> >>
>> >> http://z14.invisionfree.com/Conchologist_Forum/index.php?showtopic=1825
>> >> <http://z14.invisionfree.com/Conchologist_Forum/index.php?showtopic=1825>
>> >>
>> >>
>> >> On Thursday, July 30, 2015 11:19 AM, Derrick Hudson
>> >> <[log in to unmask]> wrote:
>> >>
>> >>
>> >> Hello,
>> >>
>> >> I know this is a very old string, but I'm new to CONCH-L and am
>> >> catching up. The paper
>> >> Genetics and taxonomy of ribbed mussels (Geukensia spp.), By Sarver et
>> >> al.
>> >> 1992 addresses this question fully. As for my experience I believe
>> >> that
>> >> G.demissa is the East coast species that spans from Rhode Isaland to
>> >> South
>> >> Florida and that G.granosissma is the Gulf of Mexico species. I
>> >> personally
>> >> have not found any G.demissa North of the Keys.
>> >>
>> >> Derrick
>> >>
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