Conservation initiatives for an endangered migratory passerine: field propagation and release

Nichols, Rina K.; Steiner, Jessica; Woolaver, Lance G.; Williams, E. T.; Chabot, Amy A.; Tuininga, Ken

doi:10.1017/s0030605309990913

Cited by 8 publications

(15 citation statements)

References 28 publications

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“…In captive conditions, the absence of predators and the availability of food (large abundance and easy to find) allowed us to collect a sufficiently large sample size for meaningful analyses. Furthermore, it is worth noting that pairs in captivity have similar or slightly higher reproductive performance than wild pairs (Nichols et al 2010;this paper). Thus, captive populations provide a magnificent opportunity for testing hypotheses because many factors that negatively affect data collection are controlled for without affecting breeding parameters.…”

Section: Captivity Conditions and Implicationsmentioning

confidence: 93%

Females are more determinant than males in reproductive performance in the house sparrow Passer domesticus

Peralta‐Sánchez

Colmenero

Redondo‐Sánchez

et al. 2020

Journal of Avian Biology

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Which sex has a more determinant role in reproductive performance? This is a long standing question in evolutionary ecology. Theory predicts and several pieces of evidence have indicated that females are more determinant than males. However, a direct test of this hypothesis has never been made. Here we perform such a direct test by using an alternative analytical approach, controlling for age and/or individual experience, and a captive population of the house sparrow Passer domesticus, a monogamous bi‐parental dimorphic species in which both sexes contribute with approximately equal amounts of parental care. In this species, it has been demonstrated that contribution by males to offspring parental care is crucial to maximize reproductive success. Captive conditions with absence of predators and availability of food ad libitum allow us to control several important factors that may affect reproductive performance, such as environmental fluctuations in resource availability and differences in territory quality, without affecting reproductive performance. We consider four types of pairs, and our main prediction derived from the hypothesis is that mixed pairs involving an experienced female (FBM × EF) should present better reproductive performance than mixed pairs involving a first‐time breeder female (EM × FBF). Our results confirm the general pattern reported in other bird species that older or more experienced individuals enjoy a higher reproductive success than first‐time breeders. In addition, in agreement with our main prediction, we found that FBM × EF produced significantly more fledglings and had higher fledging success than EM × FBF. Our results, for the first time demonstrate the broadly accepted statement that females have a more determinant role than males in reproductive performance.

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Section: Captivity Conditions and Implicationsmentioning

confidence: 93%

Females are more determinant than males in reproductive performance in the house sparrow Passer domesticus

Peralta‐Sánchez

Colmenero

Redondo‐Sánchez

et al. 2020

Journal of Avian Biology

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“…Each year, from late April to early September, selected pairs of breeding adults were relocated from overwintering facilities at African Lion Safari, Ingersoll and the Toronto Zoo to the field enclosures. A detailed description of the field propagation and release programme, including management of breeding adults and juveniles, can be found in Nichols et al (2010).…”

Section: Methodsmentioning

confidence: 99%

“…We used Nichols et al (2010) and annual reports from Wildlife Preservation Canada to compile data on resighted captive-reared birds, including their location, year resighted and breeding status (single or paired). We also used annual reports to compile data on the breeding success of all wild TABLE 1 The number of captive-reared eastern loggerhead shrikes Lanius ludovicianus migrans released during 2004-2010, the number of these that returned to the breeding site in Ontario, Canada (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Since 2001, juvenile captive-reared shrikes have been released into the wild annually as part of an Ontario-based field propagation and release programme (Nichols et al, 2010). Field propagation and release involves the breeding of captive adults in field enclosures situated in historical breeding habitat, where young birds are parent-raised and subsequently released in situ (Nichols et al, 2010). Over 600 hatch-year birds have been released to date and the first captive-reared bird returned and bred successfully with a wild shrike in 2005 (Nichols et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Recruitment of juvenile, captive-reared eastern loggerhead shrikes Lanius ludovicianus migrans into the wild population in Canada

Lagios¹,

Robbins²,

Lapierre³

et al. 2014

Oryx

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High post-release survival, low dispersal and the recruitment of captive-reared individuals into the wild population are critical to the success of any reintroduction programme. Reintroducing a migratory species poses an additional challenge as success also depends on the return of captive-reared individuals to breeding grounds in subsequent years. We investigated the effects of seven husbandry and management factors on the return rate of captive-reared eastern loggerhead shrikes Lanius ludovicianus migrans and documented the recruitment of returning individuals. During 2004–2010, 564 juveniles were released in Ontario, Canada, as part of a field propagation and release programme and there were 27 confirmed sightings of returning birds during 2005–2011. Returning birds were significantly more likely to have been released in large groups of juveniles (9–10 birds) at 5.5 weeks post-fledging from the Carden field propagation site. Comparisons of the number of young fledged and survival to 2 weeks post-fledging revealed similar results for pairs comprising one captive-reared and one wild-reared individual and pairs comprising two wild individuals. These results highlight the contribution of captive-reared shrikes to the recovery of the wild population and the importance of monitoring outcomes and evaluating techniques.

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“…The result has been a stable or growing population of this endangered subspecies. Eastern loggerhead shrikes ( Lanius ludovicianus migrans ) have also been the subject of large‐scale field propagation and release programs in Canada (Nichols et al, ) and the U.S. The U.S. participates under the umbrella of C2S2 (Conservation Centers for Species Survival), which includes several AZA facilities and partner organizations (Hallager et al, ).…”

Section: Introductionmentioning

confidence: 99%

The evolving role of zoological parks and aquariums in migratory bird conservation

Hutchins¹,

Marra

Diebold

et al. 2018

Zoo Biology

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As threats to migratory birds in the Western Hemisphere, including North America, intensify and bird populations decline, there is a growing interest among zoo biologists in the conservation and management of these taxa. The purpose of this article is to explore the role that Association of Zoos and Aquariums (AZA)-accredited zoos and aquariums either are playing or could play in the conservation and management of migratory birds. Topics explored include: (1) Public education and advocacy; (2) Captive breeding and reintroduction; (3) In situ conservation; (4) Tracking and monitoring; (5) Research/technology development; and (6) Sustainability/green practices; and (7) Partnerships. Zoos and aquariums could play an important role in increasing the public's access to understanding migratory birds and the threats they face, ultimately helping to protect these remarkable species.

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Conservation initiatives for an endangered migratory passerine: field propagation and release

Cited by 8 publications

References 28 publications

Females are more determinant than males in reproductive performance in the house sparrow Passer domesticus

Females are more determinant than males in reproductive performance in the house sparrow Passer domesticus

Recruitment of juvenile, captive-reared eastern loggerhead shrikes Lanius ludovicianus migrans into the wild population in Canada

The evolving role of zoological parks and aquariums in migratory bird conservation

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