summer radio-tracking period did not include that northeast section (see 

 Fig. 4). However, an amateur's sighting record from November 1992 and data 

 from an August 1993 survey imply that FB530 periodically visits Saluria 

 Bayou. Data from August 1993 and November 1993 also contain sightings 

 along Matagorda Peninsula of FB524 and FB528, respectively. This indicates 

 that dolphins FB523-FB532 may indeed be resident in Matagorda Bay, but 

 farther northeast than we usually survey. FB523, hov^ever, was sighted in 

 May and June 1994, offshore near the Galveston, Texas, jetties (185 km north 

 of her capture site). We also received a report of a freeze-branded (number 

 urUcnown) dolphin occurring at the Corpus Christi Ship Channel jetties, 

 100 km south of Port O'Connor, in November 1992. 



In the June 1993 survey, FB503, a pregnant female (still wearing a rototag), 

 was seen for the first time without her 2-yr-old male calf, FB508. FB503 was 

 not accompanied by a neonate. FB503's group consisted of FB515 (12-yr-old 

 female who's calf, FB517, died the previous September) and four other 

 unidentified dolphins. FB509 (3-yr-old female calf) was also seen v^thout her 

 pregnant mother, 16-yr-old FB507. Data from a July 1993 survey show that 

 FB503 was once again seen v^rithout her calf, in a group of eight dolphins 

 accompanying one of two neonates, and again in August 1993 accompanied by 

 a calf and one other dolphin. Appendix 3 charts sightings of the non-radio- 

 tagged dolphins captured. 



MOVEMENT PATTERNS 



The radio-tagged dolphins had partially to almost completely overlapping 

 ranges. Mean range size was 140 ± 90.7 (SD) km^ (Table 1). Ranges of radio- 

 tracked dolphins centered near Port O'Connor in all but three cases (Fig. 6a-c). 

 The exceptions were FB501, adult female, and FB502, adult male (Fig. 6a); and 

 FB504, adult male (Fig. 6b). Dolphins FB504 and FB502 sp)ent most of their 

 time near Port O'Connor and not far from their capture sites, but traversed 

 20-35 km southwest into western Espiritu Santo Bay and San Antonio Bay on 

 4 of 21 days and 5-11 of 39 days, respectively (on 5 of the 11 days we located 

 FB502 in western Espiritu Santo Bay/San Antonio Bay; on the remaining 

 6 days we could not locate him in the Port O'Connor area and we assume that 

 he was in the western Espiritu Santo Bay/San Antonio Bay area out of 

 receiver range, but we did not search there by boat). FB501, however, spent 

 about one-half of her time (18-45 of 59 days) in San Antonio Bay, often close 

 to the Aransas National Wildlife Refuge (ANWR). She traveled rapidly 

 between sites on at least three occasions, and sp>ent time either at the 

 northeastern (near Port O'Connor) or the southwestern (near ANWR) 

 pjortion of her range. On one occasion she traveled overnight at least 55 km in 

 12 hr for a 4.2 km/hr average speed. Because the signal of FB501 (and of all 

 others over - 20 km distant) could not be picked up by Home Base at Port 



12 



