. Bulletin. Science; Natural history; Natural history. 1975 CHIGGERS AND THEIR ANURAN HOSTS IN CALIFORNIA 17 N 10 40 10 20 17 54 s z 4. MAY JUNE JULY AUG MAY JUNE JULY AUG SEPT 1969 '970 Figure 2. The occurrence of HaniieinanUi bujonis on Bujo punctatus at Fortynine Palms Oasis, from May 1969 thiough September 1970. N is the number of toads examined, triangles and solid lines denote the mean numbers of larvae per toad, and dots and dashed lines indicate percent of chigger infestation on the toads. infested Hyla cadaverina in screen cages placed in selected sites around the oasis. HYLA CADAVERI
. Bulletin. Science; Natural history; Natural history. 1975 CHIGGERS AND THEIR ANURAN HOSTS IN CALIFORNIA 17 N 10 40 10 20 17 54 s z 4. MAY JUNE JULY AUG MAY JUNE JULY AUG SEPT 1969 '970 Figure 2. The occurrence of HaniieinanUi bujonis on Bujo punctatus at Fortynine Palms Oasis, from May 1969 thiough September 1970. N is the number of toads examined, triangles and solid lines denote the mean numbers of larvae per toad, and dots and dashed lines indicate percent of chigger infestation on the toads. infested Hyla cadaverina in screen cages placed in selected sites around the oasis. HYLA CADAVERINA AND THE CHIGGER HANNEMANIA HYLAE In the vicinity of the upper three ponds, 256 Hyla caelaverina were marked and 197 of these were recaptured at least once. Using the Schnabel Method the mean frog popiilatiLin was estimated to be appro.\imatcly 28S individuals. No territoriality was detected as marked frogs were captured at various sites. However, the frogs seemed to prefer rocks located at the western margins of ponds 1 and 3, whereas few frogs were foimd in pond 2. The tree frogs showed little movement between ponds, as only 15 indi- viduals (5 percent) were captured in meire than one pond. In July of 1969 and 1970 when the oasis was subjected to thunderstorms, Hyla cadav- erina seemed to virtually disappear. However in July 1970, after a thunderstorm, several H. cadaverina were heard calling and one tree frog was captured high up on an adjacent hillside. This migration from the canyon bottom was noted only during thundershower activity. The number of Hanneinania hylae on Hyla cadaverina varied seasonally. The mean for 1969 and 1970 was larvae per frog with percent infestation. In the spring (March, May, and early June) there was a mean of 15 chiggers (range 8-18) per frog with an estimated popula- tion of 4250 larvae. During the summer (July, August, and September) the mean per host doubled to nearly 31 larvae (range 24-37), and the estimated population of embedd
Size: 1359px × 1839px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectscience
