Notes on a population of Caiman crocodilus crocodilus depleted by hide hunting in Surinam

Glastra, Rob

doi:10.1016/0006-3207(83)90063-0

Cited by 9 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spotlight surveys have been widely used to monitor crocodilian populations and are precise and accurate in some habitats (Chabreck 1966, Glastra 1983). In the Pantanal, spotlight surveys have been of limited use because: (i) reaching remote areas by boat is logistically difficult; (ii) the wetlands are heavily vegetated such that crocodiles are difficult to see at night (Campos et al 1995); and (iii) there are problems concerning the rigidly standardized survey conditions which are for the most part impossible to achieve in practice (Chabreck 1976, Woodward & Marion 1978.…”

mentioning

confidence: 99%

Effect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil

Coutinho

Campos

1996

J. Trop. Ecol.

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Effect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil

Coutinho

Campos

1996

J. Trop. Ecol.

View full text Add to dashboard Cite

show abstract

“…Preference for vegetated sites over non‐vegetated sites by hatchling and juvenile crocodylians has been demonstrated for several crocodylians including the common caiman ( Caiman crocodilus ; Glastra, ), black caiman ( Melanosuchus niger ; Da Silveira, Magnusson, & Campos, ), A. mississippiensis (Smith, Adams, & Dinkelacker, ), Nile crocodile ( Crocodylus niloticus ; Honegger, ), Morelet's crocodile ( Crocodylus moreletii ; Cedeño‐Vázquez, Ross, & Calmé, ), and C. johnstoni (Somaweera et al., ; Figure a), with lower rates of survivorship in environments with little to no vegetation cover due to higher predation (Rootes & Chabreck, ).…”

Section: Vegetation Interactions and Outcomesmentioning

confidence: 99%

Direct and indirect interactions with vegetation shape crocodylian ecology at multiple scales

Somaweera

Brien²,

Manolis³

et al. 2018

Freshwater Biology

View full text Add to dashboard Cite

As one of the world's largest predators of freshwater environments, crocodylians play an important role in shaping their community. In turn, many aspects of crocodylian life histories are influenced and have been shaped by characteristics of their environment, especially vegetation. However, our understanding of just how vegetation impacts crocodylian life histories remains limited, particularly in regard to indirect interactions. Such interactions can be critical for understanding population dynamics and, therefore, for informing conservation management decisions. We reviewed contemporary understanding of these plant–crocodylian interactions in peer‐reviewed journals and the grey literature, synthesising life history‐shaping dynamics against aspects of their ecology. We then conceptualised how global environmental change, including climate change, species invasions and land use change, may threaten these critical dependencies, and how future conservation plans need to account for these pressures. We identified five primary aspects of crocodylian ecology—habitat selection, nesting ecology, communication, physiology, and feeding ecology—that are probably shaped by vegetation interactions at different spatial scales. These interactions include direct and indirect impacts, with both positive and negative outcomes from a crocodylian perspective. Anthropogenic impacts on environments via global environmental change drivers is causing unprecedented change to vegetation dynamics. What is often overlooked is how these changes impact large aquatic predators such as crocodylians. Our synthesis shows that while many impacts can be identified, their magnitude and mechanism are not well understood, making management driven mitigation challenging. We recommend that future studies prioritise quantifying how vegetation communities shape the suitability of crocodylian nest sites, and how to best detect the fingerprint of impacts caused by invasive alien plants on demographic change in crocodylians over longer durations. An improved understanding of the impact of vegetation impacts on crocodylians is essential for building effective conceptual frameworks and management agendas for the conservation of these iconic reptiles.

show abstract

“…Wood and Humphrey (1983) found that density in Alligator mississ*iensis was correlated to lake productivity (nitrogen concentration). Anecdotal accounts relate food availability to crocodile density (Montague 1983, Watson et al 1971 or vice versa (Cott 1961, Fittkau 1970, 1975, Whitaker 1978, Glastra 1983, suggesting that in some instances crocodilians play a beneficial role in maintaining healthy fish populations. non-hunted populations are included in Table 8.…”

Section: Density and Biomassmentioning

confidence: 99%

The Status and Ecology of the American Crocodile in Haiti

Thorbjarnarson

1988

FLMNH

View full text Add to dashboard Cite

The American crocodile (Crocodylus acutus) is the most widely distributed of the New World crocodiles. Due to a combination of hunting for its hide, habitat destruction, and malicious killing, the American crocodile is currently in danger of extinction, with isolated populations existing for the most part only in relatively undisturbed areas. Conservation and management programs are sorely needed to protect this species, but are hampered by a lack of knowledge concerning the current status of many of the extant populations and biological data concerning many aspects of the crocodile's natural history. In Haiti, crocodiles were once widely distributed throughout coastal and lowland areas where suitable habitat was available. Today, the range of the crocodile in this country has been greatly reduced, and the few extant populations have been severely depleted, remaining only in those areas that have a combination of relatively low human population density and sufficient mangrove habitat. Presently, no commercial hide hunting is occurring, and the taking of crocodiles for food or the use of their by-products are restricted to two areas bordering the Dominican Republic. Habitat destruction and incidental killings, primarily by fishermen, represent the greatest threat to crocodiles in Haiti today. The largest remaining population is found in Etang Saumâtre, Haiti's largest lake (113 sq km). Etang Saumâtre is a brackish lake, located in a sparsely inhabited region only 30 km from the capital of Port-au-Prince. The total crocodile population in the lake is estimated at 450. Over a 13-month period, various aspects of the demography, reproductive ecology, diet, and habitat selection of these crocodiles were investigated. The results are discussed in the light of other work which has been done on crocodilians. The final section outlines several recommendations for the conservation of crocodiles in Haiti.

show abstract

Notes on a population of Caiman crocodilus crocodilus depleted by hide hunting in Surinam

Cited by 9 publications

References 5 publications

Effect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil

Effect of habitat and seasonality on the densities of caiman in southern Pantanal, Brazil

Direct and indirect interactions with vegetation shape crocodylian ecology at multiple scales

The Status and Ecology of the American Crocodile in Haiti

Contact Info

Product

Resources

About