Population Studies of the Blue Crabs of the Lower Laguna Madre - Studies of the Blue Crab Populations of the Texas Coast


Blue crabs, Callinectes sapidus, Rathbun, were collected at various locations in the bay with otter trawl, 60-foot seine and trammel net. The largest numbers of juvenile crabs per trawl sample occurred during February and December. Crabs were most abundant in seine samples from April through October. The abundance of adult crabs was highest during the spring and fall, as indicated by trammel net catches. The movement of adult crabs was related to temperature and salinity. Mating occurred during late spring and early summer. This was indicated by the presence of large percentage of female crabs in the bay and the capture of "doublers". Two waves of juvenile crabs entered the bay in 1964. The first wave was detected in February; the second was detected in October. Both groups entered the bay when water temperatures were below 25.0 degrees C. and salinities were above 40.0 ppt.


pages 613-622; available for download at the link below.


blue crabs, population survey