The major departures from the results found in the 

 previous study were the low importance of an- 

 chovies in San Diego striped marlin and of squid in 

 Buena Vista sailfish stomachs. 



Table 4. — Sample sizes and condition of billfish stomachs 

 sampled during 1970. 





Striped Marlin 

 SD BV Maz 



Blue 

 Marlin 



Sailfish 





BV 



BV 



No. Stomachs 



Total 



With Food 



Empty 



Regurgitated 

 Total Vol. of Food (I) 



37 59 8 



20 37 4 



16 5 1 



1 17 3 



7.35 8.25 0.97 



15 

 8 



2 



5 

 1.86 



33 



22 

 2 



9 

 6.83 



ACKNOWLEDGMENTS 



We are indebted to representatives of resorts and 

 clubs who permitted us to examine specimens of 

 billfishes: Col. Eugene Walters, proprietor of Ran- 

 cho Buena Vista; Bill Heimpel. proprietor of the 

 Star Fleet at Mazatlan; Lois I bey, Secretary of the 

 San Diego Marlin Club. We are grateful to Lie. 

 Ricardo Garcia Soto, Director of the Departamento 

 de Tourismo de Baja California Sur for making 

 available the reported catch data of sportfishing re- 

 sorts in Baja California. We are also grateful to the 

 managers of the following Baja California resorts for 

 effort data: Bahia de Palmas. Rancho Buena Vista, 

 Hotel Palmilla, Hotel Cabo San Lucas and 

 Hacienda Cabo San Lucas. Several fleets at 

 Mazatlan kept records of catch and effort for us and 

 special thanks are due Bill Heimpel for his efforts. 

 Other members of our staff who helped us collect 

 and analyze the data were: Larry Coe, Dan Eilers, 



Table 5. — Food species of billfishes observed in 1970 (% Occurrence/% Volume). 



Striped Marlin 



Blue 

 Marlin Sailfish 



Striped Marlin 



Blue 



Marlin Sailfish 





SD BV Maz 



BV 



BV 





SD BV Maz 



BV 



BV 



ALGAE 



7.5/0.5 — — 















INVERTEBRATES 









Carangidae 









Crustacea 









Caranx caballus 



— 3.0/0.8 — 



— 



2.0/0.6 



Decapods 



— 3.0/0.2 — 



— 



— 



Decapterus hypodus 



— 3.0/1.7 — 



— 



2.0/4.4 



Cephalopoda 









Hemicaranx sp. 



— 5.0/1.0 — 



— 



— 



Argonauta sp. 



— — 50/6.2 



— 



— 



Track urns 









Squid 



5.0/0.4 62/24 25/1.2 



13/1.1 



12/3.1 



symmetricus 



38/62 — — 



— 



— 



FISHES 









Unidentified sp. 



— 3.0/1.2 — 



— 



8.2/1.0 



Elasmobranchs 



2.5/T — — 



— 



— 



Coryphaenidae 



— — — 



— 



2.0/10 



Clupeidae 









Scorpidae 









Etrumeus teres 



— 43/39 — 



— 



18/24 



Medialuna 









Sardinops sagax 



5.0/3.1 — — 



— 



— 



californiensis 



5.0/2.4 — — 



— 



— 



Opisthonema sp. 



_ _ _ 



— 



2.0/0.3 



Chaetodontidae 



— 75/12 



— 



— 



Engraulidae 









Mugilidae 









Engraulis mordax 



2.5/2.2 — — 



— 



— 



Mugil cephalus 



— — 25/79 



— 



— 



Myctophidae 



— 3.0/0.7 — 



— 



2.0/0.5 



Sphyraenidae 









Scomberesocidae 









Sphyraena sp. 



— 3.0/2.3 — 



— 



— 



Cololabis saira 



7.5/23.8 — — 



— 



— 



Scombridae 









Atherinidae 









Auxis thazard 



— 3.0/0.4 — 



37/36 



6.1/13 



A therinopsis 









Euthynnus lineatus 



— 5.1/17 — 



12/19 



8.2/13 



californiensis 



2.5/16 — — 



— 



— 



Sarda chiliensis 



2.5/0.8 — — 



— 



— 



Exocoetidae 









Scomber sp. 



— 3.0/2.1 — 



— 



4.1/2.3 



Cypselurus 









Unidentified sp. 



— — — 



25/39 



— 



californicus 



2.5/0.2 — — 



— 



— 



Balistidae 









Unidentified sp. 



— — — 



13/0.4 



— 



Batistes sp. 



— 3.0/0.1 — 



— 



6.1/0.4 



Fistularidae 









Tetraodontidae 









Fistularia sp. 



— — — 



— 



8.2/21 



Sphoeroides sp. 



— 3.0/2.2 — 



— 



— 



Syngnathidae 



— — 25/0.4 



— 



— 



Lagocephalus 









Echeneidae 









lagocephalus 



— 19/6.4 — 



— 



10/4.0 



Remora brachyptera 



— — — 



12/1.6 



— 



Unidentified Fish 



20/3.9 8/1.4 50/1.4 



38/2.2 



6.1/1.4 



99 



