Disturbance sources, human predation and reproductive success of seabirds in tropical coastal ecosystems of Sinaloa State, Mexico

Viejo, Antonio Muñoz del; Vega, Xaviera De La; González, María López; Sánchez, Jorge Sánchez

doi:10.1017/s0959270904000243

Cited by 15 publications

(9 citation statements)

References 28 publications

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“…Billed Terns and Sand-colored Nighthawks on protected beaches indicates that community protection of sand beaches strongly induces the successful breeding of these colonial bird species, which are generally threatened by egg-collecting and other anthropogenic activities (39), including agriculture and fishing. Another explanation for the much higher abundance of colonial birds at protected beaches is the "landscape of fear", whereby selection for low-predation sites is induced by generally high levels of predation risk (40).…”

Section: The High Concentration Of Both Breeding Adults and Nests Of mentioning

confidence: 99%

Unintended multispecies co-benefits of an Amazonian community-based conservation programme

et al. 2018

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Urgent challenges posed by widespread degradation in tropical ecosystems with poor governance require new development pathways to reconcile biodiversity conservation and human welfare. Community-based conservation management (CBCM) has shown potential for integrating socioeconomic needs with conservation goals in tropical environments but assessing the effectiveness of this approach is often held back by the lack of comprehensive ecological assessments. We conduct a robust ecological evaluation of the largest CBCM initiative in the Brazilian Amazon over 40 years. We show that this program has induced large-scale population recovery of the target Giant South American Turtle (Podocnemis expansa) and other freshwater turtles along a 1,500-km of a major tributary of the Amazon River. Poaching activity on protected beaches was around 2% compared to 99% on unprotected beaches. We also find positive demographic co-benefits across a wide range of non-target vertebrate and invertebrate taxa. As a result, beaches protected by local communities represent islands of high biodiversity, while unprotected beaches remain "empty and silent", showing the effectiveness of empowering local conservation action, particularly in countries experiencing shortages in financial and human resources.

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Section: The High Concentration Of Both Breeding Adults and Nests Of mentioning

confidence: 99%

Unintended multispecies co-benefits of an Amazonian community-based conservation programme

et al. 2018

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“…In the last decades a dramatic decline has been observed in this species (Brown and Snyder III, 2014;Hood and Dinsmore, 2007;Murphy et al, 2005;Ray, 2011;Rodrigues, 2013). Human disturbance, feral dogs and other predators are indicated as factors contributing to the population decline (Beja et al2014;Brown and Brindock, 2011;Del Viejo et al, 2004;Lafferty et al, 2013) and to related ecological consequences of declines in bird populations (Şekercioğlu et al, 2004).…”

Section: A B Introductionmentioning

confidence: 99%

“…Na última década um declínio dramá-tico vem sendo observado na espécie (Brown and Snyder III, 2014;Hood and Dinsmore, 2007;Murphy et al, 2005;Ray 2011;Rodrigues 2013). Perturbação antrópica, cachorros selvagens e outros predadores são indicados como fatores que contribuem para o declínio populacional (Beja et al2014;Brown and Brindock2011;Del Viejo et al 2004;Lafferty et al2013) e a consequências ecológicas relacionadas a esse declínio em populações de aves (Şekercioğlu et al2004).…”

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Cães domésticos predadores de ninho de batuíra bicuda (Charadrius wilsonia) no nordeste brasileiro

Diniz¹,

Magalhães²,

Diniz³

et al. 2016

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Resumo. Mesmo a batuíra bicuda (Charadrius wilsonia) sendo migratória, uma população residente se reproduz na costa nordeste do Brasil e seu status de conservação é descrito como em declínio pela lista vermelha da IUCN. Cães domésticos, mantidos por pescadores para fazer a guarda do material de pesca, são importantes predadores de ninhos de batuíra bicuda na Ilha do Baiacu (Costa Norte do Brasil). Pescadores locais, entretanto, têm motivação a proteger os ninhos e quando assistiram ao vídeo documentando a predação pelos seus cães agiram rapidamente para removê-los. Percebemos que providenciar evidências sobre as causas da predação dos ninhos pode ser uma estratégia eficaz para a conservação das populações de aves. Palavras-chave. Charadrius wilsonia; Cão doméstico; Predação; Batuíra bicuda.Abstract. Although Wilson´s plovers (Charadrius wilsonia) are migratory, a resident population breeds in coastal northeastern Brazil and there population trend is described as decreasing by the IUCN Red List. Domestic dogs are a major predator of Wilson's plover nests on an island in northeastern Brazil where dogs are kept to guard fishing equipment. Local fishermen, however, are motivated to protect the nests of shorebirds and when shown video recordings documenting nest predation acted quickly to remove dogs. We found that providing local residents with evidence about the causes of nest predation could play an effective role in protecting bird populations.

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“…symbolic fencing, signage) is effective in reducing anthropogenic impacts to beach-nesting birds in a regional context. Where human disturbance of nesting birds is severe in a specific location, localized management can address the problem (del Viejo et al 2004;Ruhlen et al 2003;Weston & Elgar 2007).…”

Section: Discussionmentioning

confidence: 99%

“…For example, nests on beaches that are used heavily for human recreation may experience higher direct mortality from trampling, crushing, and vandalism (Brooks et al 2013;Pol et al 2010); these areas might also support higher predator densities due to the provision of additional food resources from garbage (Yasué & Dearden 2006). Nests on uninhabited beaches may experience less chronic human disturbance, but be more vulnerable to severe acute human impacts due to a lack of regulatory presence and enforcement (Brown et al 2015;del Viejo et al 2004). The suite of predators may also vary in response to variations in landscape connectivity, habitat types and the presence of invasive species (Brown et al 2015).…”

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Supplemental Information 1: Raw Data

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Coastal birds are critical ecosystem constituents on sandy shores, yet are threatened by depressed reproductive success resulting from direct and indirect anthropogenic and natural pressures. Few studies examine clutch fate across the wide range of environments experienced by birds; instead, most focus at the small site scale. We examine survival of model shorebird clutches as an index of true clutch survival at a regional scale (~ 200 km), encompassing a variety of geomorphologies, predator communities, and human use regimes in southeast Queensland, Australia. Of the 132 model nests deployed and monitored with cameras, 45 (34%) survived the experimental exposure period. Thirty-five (27%) were lost to flooding, 32 (24%) were depredated, 9 (7%) buried by sand, 7 (5%) destroyed by people, 3 (2%) failed by unknown causes, and 1 (0.1%) was destroyed by a dog. Clutch fate differed substantially among regions, particularly with respect to losses from flooding and predation. 'Topographic' exposure was the main driver of mortality of nests placed close to the drift line near the base of dunes, which were lost to waves (particularly during storms) and to a lesser extent depredation. Predators determined the fate of clutches not lost to waves, with the depredation probability largely influenced by region. Depredation probability declined as nests were backed by higher dunes and were placed closer to vegetation. This study emphasizes the scale at which clutch fate and survival varies within a regional context, the prominence of corvids as egg predators, the significant role of flooding as a source of nest loss, and the multiple trade-offs faced by beach-nesting birds and those that manage them. 41 (24%) were depredated, 9 (7%) buried by sand, 7 (5%) destroyed by people, 3 (2%) failed by 42 unknown causes, and 1 (0.1%) was destroyed by a dog. Clutch fate differed substantially among 43 regions, particularly with respect to losses from flooding and predation. 'Topographic' exposure 44 was the main driver of mortality of nests placed close to the drift line near the base of dunes, 45 which were lost to waves (particularly during storms) and to a lesser extent depredation.46 Predators determined the fate of clutches not lost to waves, with the depredation probability 47 largely influenced by region. Depredation probability declined as nests were backed by higher 48 dunes and were placed closer to vegetation. This study emphasizes the scale at which clutch fate 49 and survival varies within a regional context, the prominence of corvids as egg predators, the 50 significant role of flooding as a source of nest loss, and the multiple trade-offs faced by beach-51 nesting birds and those that manage them. 5253 Several iconic, threatened species of the world's coastlines nest on ocean-exposed sandy shores 54 (e.g., turtles, birds) and are thought to use nest-site selection to increase clutch success, hatchling 55 survival, and ultimately fitness (Refsnider & Janzen 2010; Spencer 2002). Sandy shores include 56 distinct habitat types ...

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Disturbance sources, human predation and reproductive success of seabirds in tropical coastal ecosystems of Sinaloa State, Mexico

Cited by 15 publications

References 28 publications

Unintended multispecies co-benefits of an Amazonian community-based conservation programme

Unintended multispecies co-benefits of an Amazonian community-based conservation programme

Cães domésticos predadores de ninho de batuíra bicuda (Charadrius wilsonia) no nordeste brasileiro

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