The Coypu (Myocastor coypus) in Great Britain

Laurie, E. M. O.

doi:10.2307/1622

Cited by 41 publications

(9 citation statements)

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“…The results of the Kendall rank correlation analysis suggest that nutria occupancy was correlated with aquatic vegetation (for food and nesting) and food sources and shelter, which is consistent with previous research (Laurie 1946;Baroch and Hafner 2002). Regarding these studies, nutria occupancy was inversely correlated with water flow rate, and was high in lentic systems and stagnant water areas of the river and tributary channels.…”

Section: Discussionsupporting

confidence: 90%

Distribution, spread and habitat preferences of nutria (Myocastor coypus) invading the lower Nakdong River, South Korea

Hong

Kim

et al. 2014

Biol Invasions

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Nutria (Myocastor coypus) were introduced into South Korea in 1985 for fur farming and meat production. However, failures of nutria farm management in the late 1990s resulted in the accidental and/or intentional release of nutria into the wild, and they have spread and become serious pests. The successful management of invasive species like nutria somewhat depends on the comprehensive knowledge of distribution patterns. Therefore, this study aimed to identify the distribution, spread, and habitat preferences of nutria invading the lower Nakdong River in South Korea to facilitate current control and eradication endeavours. Nutria populations were recorded in 45 of 236 sites investigated. The distribution patterns revealed that the spread of nutria from farming sites has mainly proceeded along rivers via tributaries. Important factors associated with the establishment of new populations were food availability, levees with suitable burrow materials, and slow water flow. The winter climate was also important, and the total number of days below -4°C significantly affected nutria occurrence. To date, efforts to control or locally eradicate nutria populations have had little success due to insufficient budgets and the lack of coordinated management activities between local governments. To improve the efficiency of nutria eradication programmes, local governments must establish an integrated and coordinated strategy that is overseen by a single, national agency. To ensure the success of the programmes, this agency should make the best use of ecological information about nutria distribution, and utilize optimal control techniques and timing.

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Section: Discussionsupporting

confidence: 90%

Distribution, spread and habitat preferences of nutria (Myocastor coypus) invading the lower Nakdong River, South Korea

Hong

Kim

et al. 2014

Biol Invasions

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“…Our results show that, in western Japan, the coypu may reach sexual maturity at 4-6 months of age, regardless of sex, similar to the age of maturity of other introduced populations in the USA (ATWOOD 1950, WILLNER et al 1979), England (GOS-LING 1974, LAURIE 1946, NEWSON 1966), and Italy (COCCHI & RIGA 2008, and less than that of indigenous population in Argentina (males: 8-11 months; females: 5-10 months) (GUICHÓN et al 2003). PURVIS et al (2001) suggested that sustainable harvesting of wildlife populations should exert a strong selective force for earlier maturity.…”

Section: Discussionsupporting

confidence: 79%

Reproductive biology of the coypu, Myocastor coypus (Rodentia: Myocastoridae) in western Japan

Runami¹,

Gunji²,

Hishinuma³

et al. 2013

Zoologia (Curitiba)

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ABSTRACT. We describe the reproductive biology of the coypu, Myocastor coypus (Molina, 1782), in western Japan, as an attempt to contribute to an efficient population control program of the coypu population. A total of 212 specimens (113 males and 99 females) were collected in the Tottori prefecture from February 2010 to January 2012. From the age estimation based on body weight and molar eruption pattern, we determined that both males and females reach sexual maturity at 4-6 months of age. Of the 72 mature females examined, 60 (83.3%) were pregnant, with a mean litter size of 6.5 ± 2.4 (mean ± SE). The onset of sexual maturity in the western Japanese population was relatively earlier when compared with indigenous and other introduced populations. Furthermore, the population in Japan had relatively higher pregnancy rates and larger litter sizes, without obvious seasonal fluctuation. These observations may imply that the hunting pressure in Japan in the past 50 years has been strong enough to select individuals that mature earlier; however, nothing in the present habitat of the coypu population seems to be limiting reproduction. The relatively high reproductive potential of the present population in the mild climate of western Japan must be considered when determining appropriate management measures for this species.KEY WORDS. Litter size; pregnancy rate; sexual maturity.

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“…13). 20 In the Broads it carries a special kind of fur parasite, Pitrufquenia coypus, belonging to a family (Gyropidae) that also evolved in South America. 9 These fur lice have antennae shaped like monkey-wrenches, which perhaps explains how they managed to hang on so well all the way from South America.…”

Section: The Ecology Of Invasionsmentioning

confidence: 99%