588. Processing of digital data logger STD 

 tapes at the Scripps Institution of Oceanogra- 

 phy and the Bureau of Commercial Fisheries, 

 La Jolla, California, by James H. Jones. June 

 1969. iii + 25 pp., 6 figs., and Apps. 



ABSTRACT 

 The development of continuous sampling STD 

 (salinity-temperature-depth) sensors as a prime 

 data collection tool for oceanographic cruises has 

 necessitated the development of techniques capable 

 of handling the data with modern digital computing 

 equipment. This paper describes one such technique 

 that was developed for processing STD data collected 

 as part of the E.\STROPAC Survey Program. The 

 description assumes that the data has been digitized 

 and recorded on IBM compatible tape in the field. 

 The computer programs needed for processing the 

 basic data tapes are described, and a listing of the 

 program with subroutines is given in the Appendix. 



589. Return and behavior of adults of the first 

 filial generation of transplanted pink salmon, 

 and survival of their progeny, Sashin Creek, 

 Baranof Island, Alaska, by Robert J. Ellis. 

 October 1969, iii + 13 pp., 5 figs., 10 tables. 



ABSTRACT 



Escapement of adult pink salmon to Sashin Creek 

 in 1966 was 5,761 fish — mostly progeny of 1,866 

 adults transplanted to the stream in 1964. The 

 adults entered Sashin Creek relatively early in the 

 season and within a short period of time. Most of 

 them spawned in the same two study sections of 

 Sashin Creek ("Lower" and "Middle") used by their 

 parents and by earlier native runs of similar size. 

 The two sections had nearly equal densities of fe- 

 males (about 0.27 per square meter) and potential 

 egg deposition (about 570 eggs per square meter) 

 but diff'erent efficiencies of egg deposition (about 47 

 percent in the Middle section and 28 percent in the 

 Lower). The low average efficiency for the entire 

 stream (37 percent) was probably due to the high 

 streamflow during the spawning season. The pro- 

 portion of combined eggs and alevins alive in March 

 was nearly equal in the Middle and Lower sections 

 (63 and 65 percent), but the disappearance from 

 the end of spawning to just before emergence was 

 markedly different — about 80 percent for the Middle 

 section and 47 percent for the Lower. Total sur- 

 vival from potential egg deposition to preemergent 

 fry was 9 percent in the Middle section and 15 per- 

 cent in the Lower. 



Estimated number of pink salmon fry produced 

 in Sashin Creek in the spring of 1967 was 750,000, 

 or 12 percent of the potential egg deposition of 

 6,255,000. This is the survival predicted from the 

 historical relation of total fresh-water survival to 

 the date half the spawners entered the stream. 



Several lines of circumstantial evidence indicate 

 that the adult pink salmon that spawned in Sashin 



Creek in 1966 were mostly progeny of the fish trans- 

 planted to the stream in 1964. 



590. Distributions of fishes in fresh water of 

 Katmai National Monument, Alaska, and their 

 zoogeographical implications, by William R. 

 Heard, Richard L. Wallace, and Wilbur L. 

 Hartman. October 1969, iii + 20 pp., 2 figs., 

 3 tables. 



ABSTRACT 

 Katmai National Monument covers 10,916 km.- 

 on the base of the .Alaska Peninsula and is divided 

 by the Aleutian Mountain Range into two principal 

 drainage areas. Streams north of the Aleutian 

 Range flow into Bristol Bay of the Bering Sea, and 

 those south of the mountains flow into Shelikof 

 Strait of the North Pacific Ocean. The large multi- 

 lake Naknek River system is the dominant drainage 

 area on the Bristol Bay side of the monument, where- 

 as small single lakes and short streams and rivers 

 constitute many separate drainages on the Shelikof 

 Strait side. Twenty-four species of fish occur in 

 the Bristol Bay drainages of the monument, but only 

 eight species were collected in streams and lakes 

 draining into Shelikof Strait. Evidently the Aleu- 

 tian Range has been a barrier to the southward 

 movement of freshwater fishes in the monument. 

 All eight species in Shelikof Strait drainages are 

 capable of dispersal through salt water, whereas 

 several forms in Bristol Bay drainages require fresh 

 water for dispersal. Variable numbers of species 

 occur in the interconnecting lakes of the Naknek 

 River system. Naknek Lake, the downstream term- 

 inus of the lake system, contains 24 known species 

 and each upstream lake contains fewer species than 

 the one into which it drains. The present distribu- 

 tion of fishes in this system is discussed in terms 

 of the sequential timing of species invasion and the 

 postglacial development of barriers. 



591-592. Published in 1970. 



593. Review of studies of tuna food in the At- 

 lantic Ocean, by Alexander Dragovich. De- 

 cember 1969, iii + 21 pp., 1 apps. table. 

 ABSTRACT 

 Published and unpublished reports are reviewed 

 and methods used to evaluate the data are discussed. 

 A description is presented of the food of seven At- 

 lantic tunas of commercial importance, little tuna 

 {Euthynrnis alletteratus) , skipjack tuna (Katsu- 

 wonus pelamis) , yellowfin tuna (Thunnus albacar- 

 es) , blackfin tuna {T. atlanticus) , the bluefin tuna 

 complex {T. thyiiims thymius and T. maccoyii) , big- 

 eye tuna (T. obesus) , and albacore (T. alalunga). 

 Their food consists mainly of pelagic fish (mostly 

 juveniles, some larvae and adults), crustaceans 

 (mostly macrozooplankton) , and molusks (chiefly 

 cephalopods). The greatest number of food items 



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