Productivity constraints on Citron-crested Cockatoos in a rich community of large hole-nesting birds

Reuleaux, Anna; Siregar, Benny Aladin; Collar, Nigel; Mardiastuti, Ani; Marsden, Stuart J.

doi:10.1016/j.avrs.2022.100015

Cited by 4 publications

(4 citation statements)

References 67 publications

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“…In addition to gauging population changes over long periods, Red List reassessment of the cockatoos is complicated by several other considerations. The recent split of citron‐crested cockatoo leaves the resultant two species at higher risk of extinction than when combined, as the population on Sumba remains under pressure from illegal trapping and appears to have low productivity (Reuleaux et al ., 2022). The subspecies occidentalis and parvula may seem relatively safe with one stronghold each (Komodo for occidentalis , Timor‐Leste for parvula ), but the Komodo population depends on intense patrolling and local goodwill, both of which will be under threat if the recently proposed drastic reduction in visitor numbers to Komodo National Park (CNN Travel, 2019) is implemented, or if international travel is curtailed due to unforeseen issues such the current Covid‐19 pandemic (Caraka et al ., 2020; Jeon & Yang, 2021).…”

Section: Discussionmentioning

confidence: 99%

Correlates of persistence in remnant populations of two Critically Endangered cockatoos

Reuleaux

Collar

Jones

et al. 2022

Animal Conservation

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A challenge with species that have disappeared from most of their range is to identify the correlates of local persistence. With species decimated by trade, site‐specific trapping risk is hard to capture by remotely accessed predictors. The recently split yellow‐crested cockatoo Cacatua sulphurea and citron‐crested cockatoo C. citrinocristata have undergone catastrophic declines due to habitat loss and especially trapping, and are now extinct in much of their former range across Indonesia. Of 144 sites on 30 islands known to contain the species in 1950, only 76 on 27 islands did so in 2017–2019, with many of the other 68 experiencing extinctions between 1985 and 2000. We compared socio‐ecological conditions such as forest cover and loss, human population density and infrastructure, and protected area status between the occupied and unoccupied sites, using ‘random forests’ within decreasing time intervals 1950–2015. Populations on Sulawesi and West Nusa Tenggara were more likely to become extinct than those on Sumba, Timor‐Leste and small remote islands. Sites retaining cockatoos had high proportions of tree cover, low road density and low human densities. The relative importance of these factors changed little over time, but road density and human density became respectively more and less important in recent years. The examination of local conditions at ‘false negative’ sites (where cockatoos survived contrary to model predictions) showed that, particularly in recent years, cockatoo survival has been promoted by site‐specific protection due to traditional beliefs, NGO activities, dedicated individual residents and local topographic barriers. Some of these local influences add complexity to the task of conserving cockatoo strongholds, but also offer exciting possibilities for low‐cost conservation prescriptions tailored to individual sites. Studies combining field and remotely sensed data, and examining false negative sites for beneficial location‐specific conditions, have broad application for the conservation of taxa with once‐large ranges.

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Section: Discussionmentioning

confidence: 99%

Correlates of persistence in remnant populations of two Critically Endangered cockatoos

Reuleaux

Collar

Jones

et al. 2022

Animal Conservation

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“…The Madurese ethnicity on their home land (Madura Island) has no connection with this animal. The distribution of this animal is very limited and does not mention in Madura island (Harris et al, 2015;Reuleaux et al, 2022). This is imply that the Madurese ethnicity did not have a history of interaction with this animals before.…”

Section: • Traces Of the Bugis Ethnicity Through The Yellow-crested C...mentioning

confidence: 94%

Tracing Bugis ethnicity through the existence of yellow-crested cockatoo in Masakambing Island, Indonesia

Ihsannudin

Sriyono

Hasan

2022

ETNOSIA

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Masakambing Island has administratively located in the District of Masalembu, Sumenep Regency, East Java province, Indonesia. This island is an endemic habitat for the yellow-crested cockatoo sub-species abbotti (Cacatua sulphurea abbotti). This research aims to discover the history of the people inhabiting Masakambing island and traces of Bugis culture through the existence of the yellow-crested cockatoo. The study was conducted using a qualitative method with an ethnographic design. The study results show that the origin people who inhabited this island were from the Bugis ethnic group. The local name Beka' reflects how the yellow-crested cockatoo is very close to Bugis culture on Masakambing island. Besides, the Bugis ethnic who inhabit Sulawesi island is familiar with the yellow-crested cockatoo, sub-species sulphurea, and djampea. The existence of yellow-crested cockatoos on Masakambing island still triggers questions because the location of Masakambing island is outside the Wallace line, which is not common to find families of parrots such as yellow-crested cockatoos.

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“…From that screening, we focused on four species in East Nusa Tenggara that were heavily exploited in the past and getting closer to extinction based on the IUCN status of critically endangered. [6], [7], [8], [11], [12], [13], [14], [15], [16], [17]…”

Section: Methodsmentioning

confidence: 99%

“…Highly exploitation of the pet trade [6], [8], [15], [37], [33] Roti Island snakenecked turtle Chelodina mccordi…”

Section: Continuing Habitat Loss Illegal Trapping Low Reproductivementioning

confidence: 99%

Biodiversity catastrophic: Overexploitation of the endemic fauna in East Nusa Tenggara, Indonesia

Hidayat

Pramatana

2022

IOP Conf. Ser.: Earth Environ. Sci.

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As the southernmost province, East Nusa Tenggara (NTT) encompasses the eastern part of the Lesser Sunda Archipelago. It has a unique landscape with more than 500 small islands providing habitat for many endemic species. Local communities depend significantly on natural resources. Due to uncontrolled poaching, the population of several native faunas has drastically decreased, such as the Yellow-crested cockatoo (Cacatua sulphurea), Sumba cockatoo (Cacatua citrinocristata), and Roti Island snake-necked turtle (Chelodina mccordi). All those species were common in the past. Cockatoos are even considered a pest for local crops like corn and sorghum. Roti Island snake-necked turtle is often found in the village’s paddy fields or irrigation canals. Unfortunately, they are listed on the red list International Union for Conservation of Nature (IUCN) Red List as critically endangered. We reviewed and compiled data from scientific papers, technical reports, unpublished reports, birding reports, and online sources. We also collected data on opportunistic surveys for searching the species from 2010 to 2021. The study showed that the yellow-crested cockatoo could not be found in many areas. The Sumba cockatoo population is now scattered in fragmented forests, and the Roti Island snake-necked turtle is highly likely to be extinct in the wild.

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Productivity constraints on Citron-crested Cockatoos in a rich community of large hole-nesting birds

Cited by 4 publications

References 67 publications

Correlates of persistence in remnant populations of two Critically Endangered cockatoos

Correlates of persistence in remnant populations of two Critically Endangered cockatoos

Tracing Bugis ethnicity through the existence of yellow-crested cockatoo in Masakambing Island, Indonesia

Biodiversity catastrophic: Overexploitation of the endemic fauna in East Nusa Tenggara, Indonesia

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