Effect of the Central American Isthmus on gene flow and divergence of the American crocodile ( Crocodylus acutus )

Evolution ◽  
2020 ◽  
Author(s):  
Jose Avila‐Cervantes ◽  
Carlos Arias ◽  
Miryam Venegas‐Anaya ◽  
Marta Vargas ◽  
Hans C. E. Larsson ◽  
...  
Keyword(s):  
Gene Flow ◽  
Central American ◽  
Crocodylus Acutus ◽  
American Crocodile ◽  
Central American Isthmus

Occurrence and biogeographic significance of Heliaster (Echinodermata: Asteroidea) from the Pliocene of southwest Florida

1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell
Keyword(s):  
Central American ◽  
Eastern Pacific ◽  
Whole Body ◽  
Marine Fauna ◽  
Western Atlantic ◽  
Southwest Florida ◽  
Extant Species ◽  
Geologic Record ◽  
Central American Isthmus

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.

scholarly journals Factors influencing the occurrence of negative interactions between people and crocodilians in Mexico

Oryx ◽  
2021 ◽  
pp. 1-9
Author(s):  
Giovany Arturo González-Desales ◽  
Luis Sigler ◽  
Jesús García-Grajales ◽  
Pierre Charruau ◽  
Martha Mariela Zarco-González ◽  
...  
Keyword(s):  
Anthropogenic Activities ◽  
Biosphere Reserve ◽  
Rigorous Evaluation ◽  
Caiman Crocodilus ◽  
Crocodylus Acutus ◽  
American Crocodile ◽  
Nesting Sites ◽  
The Relationship ◽  
Nesting Season ◽  
Negative Interactions

Abstract Negative interactions between people and crocodilians have increased worldwide, but in Mexico there have been few systematic reports and no rigorous evaluation of this problem. We compiled information on negative interactions between people and the spectacled caiman Caiman crocodilus and American crocodile Crocodylus acutus from the Worldwide Crocodilian Attack Database for 1993–2018, and we investigated interactions in greater depth, through interviews with people in La Encrucijada Biosphere Reserve. We examined the relationship between the occurrence of negative interactions between people and C. acutus and the species' nesting season and abundance, and presence records. In Mexico, the frequency of negative interactions increases when anthropogenic activities occur close to nesting sites (< 30 km) and during the nesting season (February–September). In La Encrucijada, following negative interactions with crocodiles, the local inhabitants killed 30 crocodiles measuring > 2.5 m long in 2011–2012. The frequency of negative human–crocodilian interactions was not correlated with the abundance of crocodilians but was correlated with the number of presence records of crocodiles. Strategies to minimize these interactions include warnings at nesting sites, increased monitoring of anthropogenic activities during the nesting season, and management of nests to prevent them being destroyed by people.

Jumping a geographic barrier: diversification of the mangrove species Pelliciera rhizophorae (Tetrameristaceae) across the Central American Isthmus

2014 ◽  
Vol 11 (1) ◽  
Author(s):  
María Fernanda Castillo-Cárdenas ◽  
Fernando Díaz-Gonzales ◽  
Ivania Cerón-Souza ◽  
Oris Sanjur ◽  
Nelson Toro-Perea
Keyword(s):  
Central American ◽  
Mangrove Species ◽  
Geographic Barrier ◽  
Pelliciera Rhizophorae ◽  
Central American Isthmus

scholarly journals Graphic correlation of deep sea and shallow marine deposits from the Central American Isthmus region: implications for Late Neogene paleoclimatology

1992 ◽  
Vol 6 ◽  
pp. 88-88
Author(s):  
Harry J. Dowsett
Keyword(s):  
Costa Rica ◽  
High Resolution ◽  
Ocean Circulation ◽  
Deep Sea ◽  
Sea Surface ◽  
Central American ◽  
Major Barrier ◽  
Late Neogene ◽  
The Caribbean ◽  
Central American Isthmus

The stratigraphic record in Panama and Costa Rica preserves the biologic and climatic changes associated with the formation of a major barrier to marine migration and ocean circulation. Creating a high resolution temporal framework within which stratigraphic sections found on the Isthmus can be interpreted is fundamental to our understanding the history and importance of these units.The Isthmus contains rich marine macro- and microfaunas and floras on both the Pacific and Atlantic margins. Planktic foraminifers and calcareous nannofossils are common and often well preserved. Preliminary analysis of these fossils reveals a rich sedimentary record spanning the Late Miocene to Pleistocene. Multivariate statistical analyses of these assemblages provide environmental estimates. Unfortunately, traditional methods of biostratigraphy are limited in their ability to create a high resolution temporal framework for the region. For example, a majority of deposits analyzed can be placed in planktic foraminiferal zone N19 (early Pliocene). In order to answer paleobiologic and paleoclimatic questions one requires more precise correlations between sections and some indication of duration of sedimentation represented by various sections.In an attempt to overcome the shortcomings of traditional biostratigraphic methods, the Graphic Correlation method has been applied to selected sequences on the Central American Isthmus. Graphic correlation (GC) is a procedure by which two sequences can be compared and correlated using a wide variety of stratigraphic information simultaneously. A GC model of late Neogene planktic foraminifer, calcareous nannofossil, and paleomagnetic reversal events has been produced through compositing of more than 26 deep sea cores and ocean margin sequences. Following routine GC procedures the positions of all fossil first and last occurrences from a number of sections on the Caribbean and Pacific sides of the Central American Isthmus (Panama and Costa Rica) have been recorded. These sections have been correlated to the GC model and hence, to each other, providing a temporal framework for the Isthmus units.Selected sections were then correlated to other sequences such as near-by deep sea cores which have been analyzed for sea surface temperature and salinity to gain a better understanding of the overall paleoceanographic development of the region between 5 and 2 Ma. For example, correlation of units on the Caribbean side of the Isthmus with DSDP Site 502 indicates little to no change in sea surface temperatures during the entire time the Isthmus was reaching closure. Mid-to-high latitude sites exhibit amplification of warming with increasing latitude. The shoaling Isthmus, while having negligible effects on tropical marine temperatures, was responsible for increased meridional heat transport which resulted in a North Atlantic warming about 3 Ma. A general model for paleoceanographic changes during the time of closure will be discussed.

scholarly journals Differences in distress: Variance and production of American Crocodile ( Crocodylus acutus ) distress calls in Belize

2020 ◽  
Vol 10 (18) ◽  
pp. 9624-9634
Author(s):  
Miriam Boucher ◽  
Marisa Tellez ◽  
James T. Anderson
Keyword(s):  
Crocodylus Acutus ◽  
American Crocodile ◽  
Distress Calls

Status and conservation of the American crocodile, Crocodylus acutus, in Belize

2000 ◽  
Vol 96 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Steven G. Platt ◽  
John B. Thorbjarnarson
Keyword(s):  
Crocodylus Acutus ◽  
American Crocodile

Scalation of the American Crocodile,Crocodylus acutus(Crocodylidae, Crocodilia), from the Coastal Zone of Northern Belize

2010 ◽  
Vol 46 (2-3) ◽  
pp. 332-338 ◽  
Author(s):  
Steven G. Platt ◽  
John B. Thorbjarnarson ◽  
Thomas R. Rainwater
Keyword(s):  
Coastal Zone ◽  
Crocodylus Acutus ◽  
American Crocodile

The Nest Environment of the American Crocodile (Crocodylus acutus)

Copeia ◽  
1984 ◽  
Vol 1984 (1) ◽  
pp. 153 ◽  
Author(s):  
Peter L. Lutz ◽  
Ann Dunbar-Cooper
Keyword(s):  
Crocodylus Acutus ◽  
American Crocodile

Implementation of a Wildlife Management Unit as a Sustainable Support Measure Within the Palo Verde Estuary, Mexico: Example of the American Crocodile (Crocodylus acutus)

2017 ◽  
pp. 555-572
Author(s):  
Omar Cervantes ◽  
Aramis Olivos-Ortiz ◽  
Refugio Anguiano-Cuevas ◽  
Concepción Contreras ◽  
Juan Carlos Chávez-Comparan
Keyword(s):  
Wildlife Management ◽  
Management Unit ◽  
Support Measure ◽  
Crocodylus Acutus ◽  
American Crocodile
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