Fróðskaparrit - 01.01.1991, Qupperneq 52

Fróðskaparrit - 01.01.1991, Qupperneq 52
56 STUDIES ON THE LONG-FINNED PILOT WHALE and Mouritsen, in print), as well as the one described by Sergeant (1962) around New Foundland with a favorite prey (Illex illecebrosus), which can be substituted, in case of scarcity, with other prey, including fish. The highly seasonal catch of long-finned pilot whales in the Faroes has coincided with the seasonal abundance of their favorite prey (T. sagittatus), (Joensen and Zachari- assen, 1982; in print; Hoydal, in print) in the same way as in New Foundland with Illex illecebrosus (Sergeant, 1962; Mercer, 1967; 1975). Miscellaneous Albinism. Albino pilot whales have been recorded on a few occasions: 1. In Miðvágur, in 1895, one whale was red- brown and another snow-white (á Ryggi 1960: 15). 2. In 1938 an albino pilot whale occurred in a school in Vágur on Suðuroy (J. Peter- sen, pers. comm.). 3. In a school of 89 whales in Vestmanna, January 11, 1970, one whale was an albi- no (R. Mouritsen, pers. comm.).. 4. In 1979 an albino was seen several times on the Faroe Bank by fishermen (R. Mouritsen, pers. comm.). 5. In Hvannasund, 1983-84, a female with calf was lighter in colour than the rest of the school (J. Petersen, pers. comm.). Use of the meat and blubber. In daily use, one skinn was commonly calculated to be about 25 kg of blubber and 50 kg of meat (Joensen, 1976). From further study (Bloch and Zachariassen, 1989) an average skinn value corresponds to 34 kg of blubber and 38 kg of meat, i.e. nearly 70 kg. If the average skinn value was multiplied with the average amount used, 70 kg, the utilization would be on average 54%, with a range of 30-77%, N = 7 (Table 2), a value confirmed by Bloch and Zachariassen (1989) from a larger sample. The large variation from one whale to another in utilization can most likely be attributed to the subjective as- sessment. The 54% utilization figure was higher than that for fish (47%). The remaining 46% of the pilot whale was skeleton, head and intestines. Before the introduction of electric lighting in homes, the heads were boiled down for lamp oil, and the bones were used as fertilizer in the fields. Today intestines are used by some as bait on line fishery, and the production of ma- nure from the remaining 46% of the whale is being considered. With a yearly catch of about 2000 pilot whales averaging 5.6 skinn (Hoydal, in print), and a 1 skinn whale weighing a total of 7300:57= 128 kg (Table 2), the yearly basis for a fertilizer industry would only be an annual amount of: 2000 x 5.6 X 0.128 X 0.46 = 660 tons. According to Miiller (1882; 1884) the smaller whales were thought best because of their delicate meat and proportionally great- er amount of blubber. This is still the case today, but Table 2 could indicate a trerid towards a decline in the utilization of the smallest whales. Conclusion The observed growth pattern demonstrated in this study, with males having a larger body size (1.28 times), shorter life .span (5 years), and higher natural mortality rate than fe- males, (Fig. 4) and a polygynous social structure (Amos et al, 1991) agree well with
Qupperneq 1
Qupperneq 2
Qupperneq 3
Qupperneq 4
Qupperneq 5
Qupperneq 6
Qupperneq 7
Qupperneq 8
Qupperneq 9
Qupperneq 10
Qupperneq 11
Qupperneq 12
Qupperneq 13
Qupperneq 14
Qupperneq 15
Qupperneq 16
Qupperneq 17
Qupperneq 18
Qupperneq 19
Qupperneq 20
Qupperneq 21
Qupperneq 22
Qupperneq 23
Qupperneq 24
Qupperneq 25
Qupperneq 26
Qupperneq 27
Qupperneq 28
Qupperneq 29
Qupperneq 30
Qupperneq 31
Qupperneq 32
Qupperneq 33
Qupperneq 34
Qupperneq 35
Qupperneq 36
Qupperneq 37
Qupperneq 38
Qupperneq 39
Qupperneq 40
Qupperneq 41
Qupperneq 42
Qupperneq 43
Qupperneq 44
Qupperneq 45
Qupperneq 46
Qupperneq 47
Qupperneq 48
Qupperneq 49
Qupperneq 50
Qupperneq 51
Qupperneq 52
Qupperneq 53
Qupperneq 54
Qupperneq 55
Qupperneq 56
Qupperneq 57
Qupperneq 58
Qupperneq 59
Qupperneq 60
Qupperneq 61
Qupperneq 62
Qupperneq 63
Qupperneq 64
Qupperneq 65
Qupperneq 66
Qupperneq 67
Qupperneq 68
Qupperneq 69
Qupperneq 70
Qupperneq 71
Qupperneq 72
Qupperneq 73
Qupperneq 74
Qupperneq 75
Qupperneq 76
Qupperneq 77
Qupperneq 78
Qupperneq 79
Qupperneq 80
Qupperneq 81
Qupperneq 82
Qupperneq 83
Qupperneq 84
Qupperneq 85
Qupperneq 86
Qupperneq 87
Qupperneq 88
Qupperneq 89
Qupperneq 90
Qupperneq 91
Qupperneq 92
Qupperneq 93
Qupperneq 94
Qupperneq 95
Qupperneq 96
Qupperneq 97
Qupperneq 98
Qupperneq 99
Qupperneq 100
Qupperneq 101
Qupperneq 102
Qupperneq 103
Qupperneq 104
Qupperneq 105
Qupperneq 106
Qupperneq 107
Qupperneq 108
Qupperneq 109
Qupperneq 110
Qupperneq 111
Qupperneq 112
Qupperneq 113
Qupperneq 114
Qupperneq 115
Qupperneq 116
Qupperneq 117
Qupperneq 118
Qupperneq 119
Qupperneq 120
Qupperneq 121
Qupperneq 122
Qupperneq 123
Qupperneq 124
Qupperneq 125
Qupperneq 126
Qupperneq 127
Qupperneq 128
Qupperneq 129
Qupperneq 130
Qupperneq 131
Qupperneq 132
Qupperneq 133
Qupperneq 134
Qupperneq 135
Qupperneq 136
Qupperneq 137
Qupperneq 138
Qupperneq 139
Qupperneq 140
Qupperneq 141
Qupperneq 142
Qupperneq 143
Qupperneq 144
Qupperneq 145
Qupperneq 146
Qupperneq 147
Qupperneq 148

x

Fróðskaparrit

Direct Links

Hvis du vil linke til denne avis/magasin, skal du bruge disse links:

Link til denne avis/magasin: Fróðskaparrit
https://timarit.is/publication/15

Link til dette eksemplar:

Link til denne side:

Link til denne artikel:

Venligst ikke link direkte til billeder eller PDfs på Timarit.is, da sådanne webadresser kan ændres uden advarsel. Brug venligst de angivne webadresser for at linke til sitet.