41. "Stickleback " returned to Guam on 9 September and sailed for the United States the next day. 42. Unlike other sticklebacks that nest on the substrate, Nova Scotian male sticklebacks build nests in mats of filamentous algae. 43. Unlike other sticklebacks that nest on the substrate, Nova Scotian male sticklebacks build nests in mats of filamentous algae. 44. It is currently unknown whether they are a distinct species, or simply a morph of the common Atlantic stickleback . 45. Salmon, trout, three-spined sticklebacks , char, which is found in only one of the lakes. 46. Harvesting of trees around riparian environments is having a large effect of the stream ecosystem where the brook stickleback resides. 47. On inspection of the carcass, a scientific officer found a rare 15-spined sea stickleback feeding on it. 48. Eels, perch and stickleback all live in the loch which is also a breeding site for frogs and toads. 49. An experiment by Manfred Malinski in 1979 demonstrated that feeding behavior in three-spined sticklebacks follows an ideal free distribution. 50. Both examples of stickleback behavior demonstrate the elements of a strategy of cooperation that may resemble tit-for-tat.
