Temperature affects nearly all biological processes, including acoustic signal production and reception. Here, we report on advertisement calls of the Puerto Rican coqui frog (Eleutherodactylus coqui) that were recorded along an altitudinal gradient and compared these with similar recordings along the same altitudinal gradient obtained 23 years earlier. We found that over this period, at any gi...

A population of young blacktip sharks was monitored over three years to determine their mortality rates using a series of acoustic listening stations. Based on these data it was possible to use several mortality estimators, including indirect life -history based methods and direct methods such as the Kaplan-Meier and SURVIV methods, to estimate natural, fishing and total mortality. Kaplan-Meier...

Abstract Cryptogenic species are those whose native and introduced ranges unknown. The extent long history of human migration rendered numerous cryptogenic. Incomplete knowledge regarding the origin habitat a poses problems for conservation management may confound ecological evolutionary studies. Lesser Antilles pose particular challenge with regard to cryptogenic because these islands have bee...

Identifying the origins of established alien species is important to prevent new introductions in future. The greenhouse frog ( Eleutherodactylus planirostris ), native Cuba, Bahamas, and Cayman Islands, has been widely introduced Caribbean, North Central America, Oceania Asia. This invasive amphibian was recently reported Shenzhen, China, but potential introduction sources remain poorly unders...

A recent publication in Biology Letters added a new family, Eleutherodacytlidae, to the list of frogs known to possess defensive, toxic alkaloids in their skin— the so-called ‘poison frogs’ [1]. The alkaloids have attracted much attention since they are not synthesized by frogs de novo, but rather are obtained from dietary sources and subsequently sequestered in the frogs’ skin [2]. These ‘clep...

Although tropical forest birds are known to prey upon small lizards and frogs, no study has documented the attributes of vertebrate-eating birds or whether birds prey opportunistically on the different elements of the herpetofauna within tropical communities. This study is based on a 14-mo investigation on avian diet, supplemented with a 3-y census of frogs and a 1-y census of lizards in a humi...