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June 1 - 3 , 1978 - University of Hawaii at Manoa

June 1 - 3 , 1978 - University of Hawaii at Manoa

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irds have been forced to m<strong>at</strong>e with siblings and even captive<br />

individuals inside the pens. Three free-living, pen-reared<br />

females have returned to pens and m<strong>at</strong>ed with captive ganders.<br />

Two <strong>of</strong> these nests resulted in goslings while the eggs failed to<br />

h<strong>at</strong>ch in the third nest. One sibling m<strong>at</strong>ing occurred in the<br />

wild in 1977, resulting in two <strong>of</strong>fspring, but this pair bond<br />

dissolved and the female nested with another male in <strong>1978</strong>, pro-<br />

ducing one fledgling. Ironically, this new male partner is a<br />

brother <strong>of</strong> the female which was h<strong>at</strong>ched in a different pen.<br />

Captive stock is rot<strong>at</strong>ed annually in the pens so th<strong>at</strong> different<br />

localities will be seeded by more than one pair. In any case,<br />

sibling pair bonds w i l l prevail for a few more years until<br />

fledglings have been produced to provide m<strong>at</strong>es for newly released<br />

birds.<br />

To obtain inform<strong>at</strong>ion concerning the breeding biology <strong>of</strong><br />

wild popul<strong>at</strong>ions in and near HAVO, field work was begun during<br />

the 1977-8 breeding season <strong>at</strong> high elev<strong>at</strong>ions--1675 m to 2134 m<br />

(5500-7000 ft)--with the objective <strong>of</strong> loc<strong>at</strong>ing and monitoring<br />

nesting success. Six nests were found between 1860 m and 1980 m<br />

(6100 & 6500 ft) elev<strong>at</strong>ion in the st<strong>at</strong>e Keauhou Nene sanctuary,<br />

while five nests were found between 1920 m and 1950 m (6300 &<br />

6400 ft) elev<strong>at</strong>ion in the adjacent lands <strong>of</strong> Kapapala within<br />

HAVO. One wild nest was loc<strong>at</strong>ed <strong>at</strong> 1160 m (3800 ft) elev<strong>at</strong>ion<br />

near Kilauea Cr<strong>at</strong>er. Eight <strong>of</strong> these nests were active when found<br />

and the remaining four had been vac<strong>at</strong>ed not long before their<br />

discovery. The progress <strong>of</strong> the active nests was followed for as<br />

long as possible, but after the eggs h<strong>at</strong>ched, broods were diffi-<br />

cult to loc<strong>at</strong>e. Four <strong>of</strong> six pairs th<strong>at</strong> were known to have pro-<br />

duced viable <strong>of</strong>fspring lost one or more <strong>of</strong> their young within<br />

four weeks after h<strong>at</strong>ching. In addition, three pairs were<br />

observed with young, but nests were not loc<strong>at</strong>ed.<br />

At least 28 pairs were identified which did not breed suc-<br />

cessfully, although some apparently made nestlng <strong>at</strong>tempts,<br />

judglng from the brood p<strong>at</strong>ches evident on a few females. Poor<br />

nesting results in the wild and in HAVO pens was perhaps partly<br />

due to extraordinarily dry we<strong>at</strong>her occurring throughout the<br />

breeding season.<br />

Additional research is being conducted on breeding biology,<br />

food habits, habit<strong>at</strong> utiliz<strong>at</strong>ion, behavior, popul<strong>at</strong>ion dynamics,<br />

and inimical factors <strong>of</strong> wild and captive Nene in conjunction with<br />

Park breeding-release programs. The objectives <strong>of</strong> this research<br />

are to contribute to the restor<strong>at</strong>ion <strong>of</strong> viable, wild popul<strong>at</strong>ions<br />

<strong>of</strong> Nene and to explore the biology <strong>of</strong> this unique species <strong>of</strong><br />

goose.

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