. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Aggressive Behavior in Annelid Family Nereidae 23 the cuticle or missing it entirely. This action continued as long as the worms were near one another. Nereids are omnivorous feeders and they use their jaws in grasping food. The action, however, is generally slower and without jerking body movements (Reish, 1954). Since a difference in the intensity of fighting was noted, a numeri- cal score was devised to quantify these differences. The following system was employed: 0 = No fighting response
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Aggressive Behavior in Annelid Family Nereidae 23 the cuticle or missing it entirely. This action continued as long as the worms were near one another. Nereids are omnivorous feeders and they use their jaws in grasping food. The action, however, is generally slower and without jerking body movements (Reish, 1954). Since a difference in the intensity of fighting was noted, a numeri- cal score was devised to quantify these differences. The following system was employed: 0 = No fighting response (Fig. 1). 1 = Avoids contact with the other specimen when the other speci- men is nearby. Palpi may be flared (Fig. 2). 2 = Fighting position assumed with the palpi flared. Jaws partially extended (Fig. 3). 3 = Aggressive, violent attacks upon the other specimen with jaws extended and biting (Fig. 4). the results of each series were totaled; the higher this value, the more aggressive the species was considered. When different species were placed together, the behavior was recorded for both Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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