Proximate Factors Affecting the Predatory Behavior of the Red Spitting Cobra, Naja mossambica pallida

1997 ◽  
Vol 31 (1) ◽  
pp. 66 ◽  
Author(s):  
Kenneth V. Kardong ◽  
Tammy L. Kiene ◽  
E. K. Johnson
Keyword(s):  
Predatory Behavior ◽  
Factors Affecting ◽  
Proximate Factors

Factors affecting brood abandonment in gadwalls (Anas strepera)

2000 ◽  
Vol 78 (2) ◽  
pp. 327-331 ◽  
Author(s):  
Michel Gendron ◽  
Robert G Clark
Keyword(s):  
Body Condition ◽  
Brood Size ◽  
Female Body ◽  
Confounding Factor ◽  
Factors Affecting ◽  
Proximate Factors ◽  
Anas Strepera ◽  
Brood Desertion ◽  
Brood Success

Brood desertion by radio-equipped female gadwalls (Anas strepera) was examined to test three hypotheses regarding proximate factors responsible for post hatch brood abandonment in waterfowl. Gadwall broods with the greatest duckling mortality, independent of brood size, were more likely to be abandoned, providing support for the "brood-success" hypothesis. Our results do not support the "brood-size" hypothesis, as the size of broods immediately prior to female abandonment was no smaller than the size of broods not abandoned. Although brood fate was not related to female body condition, the "salvage-strategy" hypothesis could not be rejected, because experience was a confounding factor and could not be sampled adequately; younger, possibly less-experienced females were more likely to abandon their broods than older females. Further studies, preferably involving experimental manipulations, are needed to adequately address the full array of hypotheses.

Proximate Factors Affecting Male Elk Hunting Mortality in Northern Idaho

2002 ◽  
Vol 66 (2) ◽  
pp. 491 ◽  
Author(s):  
Stephen G. Hayes ◽  
David J. Leptich ◽  
Peter Zager
Keyword(s):  
Factors Affecting ◽  
Proximate Factors ◽  
Hunting Mortality ◽  
Elk Hunting ◽  
Northern Idaho

Effect of Habitat Decimation on Ring-Billed Gull Colony- and Nest-Site Tenacity

The Auk ◽  
1982 ◽  
Vol 99 (2) ◽  
pp. 328-331 ◽  
Author(s):  
Linda K. Southern ◽  
William E. Southern
Keyword(s):  
Nest Site ◽  
Breeding Habitat ◽  
Factors Affecting ◽  
Return Rates ◽  
Habitat Alterations ◽  
Larus Delawarensis ◽  
Proximate Factors ◽  
Site Tenacity ◽  
Colony Site

Abstract Colony-site tenacity and nest-site tenacity have been documented in several larids, but the proximate factors affecting fidelity remain poorly understood. We examined the effect of severe breeding-habitat alterations (bulldozing) on site tenacity in Ring-billed Gulls (Larus delawarensis). Return rates of wing-tagged adults were similar in bulldozed and unchanged parts of the colony site. In bulldozed areas, however, most ring-bills abstained from nesting; those that did breed showed an increased tendency to move to a different nest site.

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