Bulletin, Gulf Biologic Station . s, that during the heighth of the spawning season one canhardly dish up a bucket of water anywhere in salt or brackishwater without finding several oyster larvae in it. The larvaeat this stage are just barely visible to the unaided eye and looklike a tiny bit of chalk. The shell has already started to form,but the two valves are more nearly symmetrical, and it looks morelike what one might imagine to be the young of the quahogclam than an oyster. The free-swimming stage in the life of the oyster is a wise pro-vision made by nature for its distribution. Where t
Bulletin, Gulf Biologic Station . s, that during the heighth of the spawning season one canhardly dish up a bucket of water anywhere in salt or brackishwater without finding several oyster larvae in it. The larvaeat this stage are just barely visible to the unaided eye and looklike a tiny bit of chalk. The shell has already started to form,but the two valves are more nearly symmetrical, and it looks morelike what one might imagine to be the young of the quahogclam than an oyster. The free-swimming stage in the life of the oyster is a wise pro-vision made by nature for its distribution. Where the spawnis drifted into one of the ocean currents, it may be floatedhundreds of miles out to sea. Even under natural conditionof our tides west of the Mississippi River, and away from theinfluences of any river, young larvae have been found in thegulf, in scarce numbers, at least ten miles from the shore, andprobably more than that from any oyster beds. Likewise it hasbeen caught in inland lakes where waters are absolutely I.—AN OYSTERMANS is a type of the more substantial oyster camps found on the leased land belonging- to this party lies directly in front of the house,ihe man and his two sons live here the year round, and thus are able to workthe grounds constantly; but better yet are able to fully protect their men are hand tongers, yet they have made oystering a profitable busi-ness. excepting, near the outlet which becomes brackish at times, dueto backing up of salt water. —As stated above, the swimming movements ofthe oyster larvae are directed chiefly towards keeping it at thesurface of the water. At a depth of sixteen feet comparativelyfew larvae are found, somewhat more during mid-day and aftera heavy rain, when the water density is several points less atthe surface than at a depth. But the difference is not so muchas might be expected. An average of fifty towings made imderlike conditions in approximately the sam
Size: 1766px × 1415px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorgulfbiol, bookcentury1900, bookdecade1910, bookyear1910
