. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. **T* * ^%> ' **£*+- \* . ,-m&. 4 ~* %. FIGURE 7. Fin damage. A. Loligo pealei with fairly severe fin damage incurred initially from transport. B. The same squid as in (A) showing the amount of damage on the posterior fin and the ventral mantle that resulted from hitting the transport tank walls. C. Loligo plei female (82 mm ML) from Observation 1 with moderate fin damage. Note the expanded chromatophores that are usually present around the periphery of damage. D. Loligo plei female (87 mm ML) with several round patche
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. **T* * ^%> ' **£*+- \* . ,-m&. 4 ~* %. FIGURE 7. Fin damage. A. Loligo pealei with fairly severe fin damage incurred initially from transport. B. The same squid as in (A) showing the amount of damage on the posterior fin and the ventral mantle that resulted from hitting the transport tank walls. C. Loligo plei female (82 mm ML) from Observation 1 with moderate fin damage. Note the expanded chromatophores that are usually present around the periphery of damage. D. Loligo plei female (87 mm ML) with several round patches of damage; these are less lethal than damage to the periphery of the fin. observed only on one rare occasion. In summary, under ideal circumstances there is interspecific compatibility among the three species, but when a size difference exists the larger individual usually dominates. As the three species were exposed to salinity shock when first brought to the laboratory, their reactions were immediate. The first manifestation of stress was the curling of the extreme distal portions of the eight arms. The squids also showed sluggish hovering and swimming movements and usually did not school or feed immediately. In extreme cases, some squids would go to the bottom and sit, a posture very uncommon to Lolliguncula brevis and Loligo plei, but not unusual for Loligo pealei. Normal behavior usually resumed within one hour or less. Field behavior was also species specific. Loligo plei was nearly always found in moderate- to large-sized schools both during the day and night. Around night light stations, the schools usually stayed deep and would characteristically rise en masse to the surface under the light, then quickly dive. They preferred the periphery of shrimp nearly as long as the squids' mantle length. C. Small squid from Observation 16 (Table III) eating a very large silverside, Menidia beryllina. D. A female swimming in a typical threat posture three days after brain surger
Size: 1282px × 1950px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
