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M U D P 
I 
no. 18 
Museum and University Data, Program and Information Exchange 
(PLEASE NOTE: Thi 
in the 1969 Cambr 
on the list. If 
issues, please se 
Reptiles and Amph 
Washington, DC 20 
s issue of MUDPIE is going to all participants 
idge Symposium-see page 2-who are not already 
this includes you, and you wish to receive later 
nd your name and address to MUDPIE, Division of 
ibians. National Museum of Natural History, 
560. ) 
AVAILABLE PROGRAMS 
The Food and Agriculture Organization of the United Nations 
has issued a set of computer programs for fish stock assessment, 
written by various programmers and compiled for FAO by Norman J. 
Abramson. The set is identified as FIRD/T101, "Computer Programs 
for Fish Stock Assessment," and can be obtained upon request from 
the Research Information Section, Fishery Resources Division, FAO, 
Via delle Terme di Caracalla, Rome 00100, Italy. The programs 
listed include: 
s cheme 
assuming 
Programmed 
to equally 
separate 
FORTRAN. 
AGECOM--Estimates age composition using double sampling 
with length as strata. Also provides estimates 
simple random sampling of aged fish. FORTRAN, 
by D.J.Mackett, Cal. Fish & Game. 
BGC 2 --Fits the von Bertalanffy growth-in-length curve 
spaced age groups with unequal sample sizes for 
ages. N.J.Abramson, Cal. Fish & Game. FORTRAN 
BGC 3 --As BGC 2, but for unequally spaced age groups. 
P.K.Tomlinson, Cal. Fish & Game. 
BGC 4 --Estimates the parameters K and L sub infinity of the von 
Bertalanffy growth-in-length curve when only the lengths 
of individual fish at two points in time are known. This 
allows the curve to be fitted to tag release and recovery 
data. FORTRAN. P.K.Tomlinson, Cal. Fish & Game. 
WTLN --Fits a curve giving weight as a function of length, pro¬ 
duces a table of fitted weights and lengths, and provides 
various related statistics. FORTRAN. N.J.Abramson, Cal. 
Fish & Game. 
NORMSEP-Separates length frequency sampling distributions into 
component normal distributions. Used to estimate age 
group relative abundance in length samples of unageable 
species. V.Hasselblad, modif. by P.K.Tomlinson. FORTRAN. 
An additional nine programs are given, dealing rather closely 
with commercial fisheries problems such as estimation of fishing 
power, mortality rates, yield curves, and spawner-recruit curves. 
— JAP. 
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( JUL 1 b 19/1 j 
