. Bulletin - Southern California Academy of Sciences. Science. 38 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES B. 1 > \ \ ) \ \ \) \ \ \ \ H4 *• 1 54 16 -91 Fig. 1. Study sites for blue catfish in northern and southern Mexico. (A) Lower Rio Bravo of Coahuila, Nuevo Leon and Tamaulipas; (B) Rio Lacantun at Reserva de la Biosfera de Montes Azules, Chiapas. Names of sites are indicated in the text. The original body measurements were standardized by means of the regression of Elliott et al. (1995), which removes the size component from the shape measurements (allometry), and is calculated for each
. Bulletin - Southern California Academy of Sciences. Science. 38 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES B. 1 > \ \ ) \ \ \) \ \ \ \ H4 *• 1 54 16 -91 Fig. 1. Study sites for blue catfish in northern and southern Mexico. (A) Lower Rio Bravo of Coahuila, Nuevo Leon and Tamaulipas; (B) Rio Lacantun at Reserva de la Biosfera de Montes Azules, Chiapas. Names of sites are indicated in the text. The original body measurements were standardized by means of the regression of Elliott et al. (1995), which removes the size component from the shape measurements (allometry), and is calculated for each character by the following equation: Ms = Mo (Ls/Lt)b; where Ms = standardized measurement of the character, Mo = original measurement of the character (mm), Ls = average standard length (mm) of all the specimens from the two groups examined, Lt = standard length (mm) of specimen, and "b" was estimated for each character from the observed data using the non-linear regression equation, M = aLb. Parameter "b" was estimated as the slope of the regression log Mo on log Lt using all fish. The standardized morphometric values of the 34 examined specimens were analyzed between groups (northern: Lower Rio Bravo basin, and southern: Rio Lacantun basin) by means of "forward stepwise discriminant" function analysis (DFA) using Statistica (StatSoft, Inc., Tulsa, OK, 1995). The DFA allowed us to detect which combination of characters discriminated best between groups. Finally, each character was compared statistically between groups using a Student's "t" Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles : Southern California Academy of Sciences
Size: 1608px × 1553px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
