A south Louisiana winter that has been colder than normal so far has caused a sluggish start to the 2018 crawfish season. But industry officials are optimistic that crawfish will be a lot more plentiful by March or April. Mark Shirley, an aquaculture specialist with LSU AgCenter and Louisiana Sea Grant, said several “cold snaps” since December have slowed crawfish growth and activity in ponds, which has significantly reduced the catch. However, the cold weather has not killed crawfish. “It just slowed down their movement coming to the traps. And it slowed down their growth cycles,” Shirley said. “They’re still ...