. Bulletin. Science. 20 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 350 o o. Lt = 300(1-e-°-296(t-,01)) Rz = n = 556 5 6 7 Age (years) 10 11 12 Fig. 4. Plot of the von Bertalanffy growth function fitted to the length and age data for spotted sand bass. Note the considerable variation in size with age and that some fish grow very quickly, some approaching 200 mm SL bay and age of 1 yr. liths with opaque edges occurred in samples collected during summer periods (83%; Figure 5). Edges of spotted sand bass otoliths from the other three seasons were mostly translucent (84-95%). The ANCOVA indicat
. Bulletin. Science. 20 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 350 o o. Lt = 300(1-e-°-296(t-,01)) Rz = n = 556 5 6 7 Age (years) 10 11 12 Fig. 4. Plot of the von Bertalanffy growth function fitted to the length and age data for spotted sand bass. Note the considerable variation in size with age and that some fish grow very quickly, some approaching 200 mm SL bay and age of 1 yr. liths with opaque edges occurred in samples collected during summer periods (83%; Figure 5). Edges of spotted sand bass otoliths from the other three seasons were mostly translucent (84-95%). The ANCOVA indicated that growth rates within the northern Gulf were not significantly different (p = ), but did differ for the Pacific coast population (p<, Figure 6). Hence, spotted sand bass grow faster in the Gulf of Cali- fornia than they do in Pacific coast waters. Log-linearized growth rates can be translated into a rate of mm/year. Fish in the Gulf population are growing at an average rate of ca. 27 mm/year, whereas the Pacific coast population are growing at an average rate of ca. 10 mm/year; less than half that of the Gulf population. Discussion Spotted sand bass are one of the most common nearshore fishes in Bahia de Los Angeles and were readily caught in every season except winter. During winter sampling they were uncommon and skittish at free diving depths (50 m) at the southern entrance to Bahia de Los Angeles. These large adults (210-295 mm SL) readily took bare hooks and seemed to be exhibiting an aggregational behavior similar to that observed in Southern California waters (Larry Allen, CSU Northridge, personal communication). Spotted sand bass from Bahia de Los Angeles did not differ in growth from. 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 Ang
Size: 2293px × 1090px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectscience
