منابع مشابه
Ecology of the Porcupine caribou herd
Researchers have described general patterns of population regulation that fit most caribou (Rangifer tarandus) herds. Nevertheless, specific factors operating on particular populations vary greatly, and efforts to categorize herds according to the general patterns often lead to confusion. It is difficult for biologists to attempt to describe population dynamics in terms of density relationships...
متن کاملReproductive biology of the male Cape porcupine
The reproductive tract of the male Cape porcupine is morphologically and histologically similar to that of New World hystricomorph rodents. Males are reproductively active throughout the year and attained sexual maturity (complete spermatogenesis) at an age of 8-18 months. Testes weight, epididymides weight and seminiferous tubule diameter attained asymptotic values at the age of 23-30 months. ...
متن کاملReproduction in the Cape porcupine Hystrix africaeaustralis: an ecological perspective
Cape porcupines, Hystrix africaeaustralis, apparently have a wide ecological tolerance and are found extensive ly throughout Southern Africa. These fossorial hystrico morph rodents are monogamous, live in extended family groups, breed seasonally in summer rainfall areas, and adult pairs produce only a single litter each year. A litter interval ofabout one year is maintained through lactationa...
متن کاملPorcupine Damage and Repellent Research in the Interior Pacific Northwest
Porcupines (Erethizon dorsatum) rely on trees and shrubs for winter food and can cause serious, localized damage to conifers. Twenty-two percent of ponderosa trees (Pinus ponderosa) examined in southeastern Washington were damaged by porcupines. Most damage involved complete girdling of the midto upper boles of the larger trees (12 to 30 cm dbh) in the stand. Preliminary repellent trials with c...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1959
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2270