Daniel, cool question! I'm not sure of the answer specifically, but I seriously doubt it. From what I know on the collaboration/friendship between Steinbeck and the marine biologist Ed Ricketts (the inspiration for 'Doc' in Cannery Row, as you may know), Ricketts did all the science writing and Steinbeck wrote the forward to 1948 edition of Between Pacific Tides, and some writing on their exploration to the Sea of Cortez (The Log from the Sea of Cortez), which probably doesn't meet your definition of "formal scientific papers." Anyhow, if I'm wrong and Steibeck DID publish formally, please let me know. And by the way, I read somewhere that an early edition of The Log contained species accounts, in case you're looking for a historical reference for species or assemblage distributions. These accounts were later cut from the book to make it more "readable." Good luck!
Thank you a lot Seth, I admire Steimbeck's writings very much and feel sorry that I noticed them just after my graduation, anyway, luckily, Gerald Durrel's writings had pushed me into Biological research, I think many scientists are what they are because of non scientific writings and I envy the power of this kind of writings, as they are perhaps the most effective way to achieve environmental awareness and to seduce future generations of life scientist