. Commercial fisheries review. Fisheries; Fish trade. 25 proper food at the proper ; He reported that very young fish were fed small amounts of natural plankton (microscopic ocean plants and animals). As the fish grew, they were fed larger amounts of plankton, and also brine With a lot of food and warm water some species more than doubled in length during their first two weeks of Fig. 2 - Sardines, Zj to 4 inches long (standard length) photo- graphed during the week of October 10. School has about 50 specimens widi a rather wide difference in size. The sardines shown
. Commercial fisheries review. Fisheries; Fish trade. 25 proper food at the proper ; He reported that very young fish were fed small amounts of natural plankton (microscopic ocean plants and animals). As the fish grew, they were fed larger amounts of plankton, and also brine With a lot of food and warm water some species more than doubled in length during their first two weeks of Fig. 2 - Sardines, Zj to 4 inches long (standard length) photo- graphed during the week of October 10. School has about 50 specimens widi a rather wide difference in size. The sardines shown were hatched August 11, 1966. (Photo: George Mattson) Studies Needed For Conservation of Species Dr. E. H. Ahlstrom, Laboratory director, said Pacific mackerel and sardines are being studied to gather information needed to con- serve and manage the species. "Our suc- cessful experiments will enable scientists to study the life history and habits of these fish under controlled conditions. This is one of the most important recent developnaents in marine fishery biology. Information on ma- rine fish larvae and factors influencing sur- vival will enable scientists to better under- stand changes in abundance of commercial fish populations. "Rearing and studying the larvae in the laboratory will ultimately pro- vide information leading to international co- operation in regulating the high seas ; Pacific mackerel are an important West Coast fishery. But sardines, the mainstay of a prosperous fishery in the mid-1940s, have become scarce. La Jolla's Tuna Vessel Research Pays Off The results of a study by BCF's Tuna Re- sources Laboratory at La JoUa and a Van Camp Seafood Co. representative have stim- ulated a tuna vessel fleet owner to convert its vessels for maximum efficiency at rela- tively modest cost. The study determined the optimum size of tuna vessels that would give maximum return for the effort and money expended. Based on the study. National Ma- rine Te
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Keywords: ., book, bookcentury1900, booksubjectfisheries, booksubjectfishtrade
