Table 2.
Infection statistics for the ectoparasites and epizoics recovered from one lateral flank and the fluke of each common minke whale, Balaenoptera acutorostrata Lacépède, 1804, (n = 185) landed in Icelandic waters during the period April to September 2003-2007
| Regression of body length against ln (intensity) | Chi test prevalence on females vs. males (df = 1) | Chi test prevalence in April-July vs. Aug-Sep (df = 1) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| |
Habitat† |
P (%) |
M.I |
r |
p |
χ2 |
p |
χ2 |
P |
|
Phylum Arthropoda |
|
|
|
|
|
|
|
|
|
|
Fam. Caligidae |
|
|
|
|
|
|
|
|
|
|
Caligus elongatus |
all |
11.9 |
95.5 |
0.23 |
0.32 |
1.45 |
0.23 |
28.88 |
<0.001 |
|
Fam. Pennellidae |
|
|
|
|
|
|
|
|
|
|
Pennella balaenopterae |
B, C, D |
10.3 |
1.6 |
- |
- |
|
|
|
|
|
Fam. Cyamidae |
|
|
|
|
|
|
|
|
|
|
Cyamus balaenopterae |
all |
6.5 |
37.0 |
0.19 |
0.59 |
5.08 |
0.02 |
13.69 |
<0.001 |
|
Fam. Lepadidae |
|
|
|
|
|
|
|
|
|
|
Conchoderma virgatum |
B, C (*) |
0.5 |
4.0 |
- |
- |
|
|
|
|
|
Conchoderma auritum |
A (baleen plate) |
0.5 |
1.0 |
- |
- |
|
|
|
|
|
Fam. Coronulidae |
|
|
|
|
|
|
|
|
|
|
Xenobalanus globicipitis |
D |
1.6 |
5.3 |
- |
- |
|
|
|
|
|
Phylum Chordata |
|
|
|
|
|
|
|
|
|
|
Fam. Petromyzontidae |
|
|
|
|
|
|
|
|
|
|
Petromyzon marinus attached |
B, C |
2.7 |
1.0 |
- |
- |
|
|
|
|
|
P. marinus fresh scars |
B, C |
10.6 |
na |
|
|
|
|
|
|
|
P. marinus old scars |
A, B, C |
45.2 |
na |
|
|
|
|
|
|
|
Class Monogenea |
|
|
|
|
|
|
|
|
|
|
Fam. Udonellidae |
|
|
|
|
|
|
|
|
|
| Udonella caligorum** | all | 6.6 | na | ||||||
Abbreviations: M.I., mean intensity; p, probability; P, prevalence; r, regression coefficient; χ2, chi-squared; na, not available.
†For a description of the “Habitat” regions see Figure 1; * Attached to P. balaenopterae; ** Infection statistics on C. elongatus based on the microscopic evaluation of a sub-sample of 332 C. elongatus.