Riqueza de especies, nuevos registros y actualización del listado taxonómico de la comunidad de murciélagos del Parque Nacional Natural Gorgona, Colombia

Abstract

Species richness, new reports and inventory update of bat assemblage of the Gorgona National Natural Park, Colombia. The information resulting from inventories is crucial for tracking the effects of habitat alteration and climate change on biodiversity, and for determining conservation priorities. Bats provide several ecosystem services and reflect the status of the populations they interact with. However, the inventory of bats in Gorgona National Natural Park can be incomplete since relatively few intensive surveys have been done. Using mist nets in areas with different forest cover, 670 bats representing 10 species and three families (Emballonuridae, Phyllostomidae and Vespertilionidae) were captured. Frugivorous species were more abundant in the survey, but a higher number of insectivorous species were registered. A model that incorporates detectability suggests that 33 bat species occur (95% credible interval= [26,39]) and that frugivorous species have a higher detectability than other trophic guilds. To the 13 bat species reported for Gorgona, we added two: Peropteryx macrotis and Mimon crenulatum. in conclusion, our results add two new records of bats to Gorgona, and suggest that the inventory of bats in Gorgona is incomplete, and aerial insectivorous bats have been underrepresented because of the exclusive use of mist nets. Rev. Biol. Trop. 62 (Suppl. 1): 407-417. Epub 2014 February 01.

Ear pinnae in a neotropical katydid (Orthoptera: Tettigoniidae) function as ultrasound guides for bat detection

“…We compared the ultrasonic hearing range of C. gorgonensis to the echolocation frequencies of the most common co-occuring insectivorous gleaning bats ( Murillo et al, 2014 ), which were recorded in a previous study ( Geipel et al, 2021 ). Gardnerycteris crenulatum emits multi-harmonic, frequency-modulated (FM) echolocation calls with a call duration of 0.69 ± 0.2 ms, a peak frequency (frequency with maximum amplitude) of 71.1 ± 4.1 kHz and minimum and maximum frequencies (lowest frequency below and highest frequency above the peak frequency with a threshold of –20 dB) of 63.2 ± 3.4 kHz and 95.9 ± 4.8 kHz, respectively ( n = 50 calls, 1 individual; Geipel et al, 2021 ).…”

“… ( A ) Ecological relevance of pinnae in Supersonus aequoreus and Eubliastes aethiops . Sound pressure level gains (left) induced by the pinnae are present only at frequencies >80 kHz, covering the range of echolocation frequencies of the three native insectivorous gleaning bat species recorded for Gorgona ( Murillo et al, 2014 ) Gorgona phyllostomid 1 and Gorgona phyllostomid 2 represent two representative bat calls recorded on the island. The conspecific call of Eubliastes aethiops is not enhanced by the pinnae (dB peak at 22 kHz); however, Supersonus aequoreus likely uses pinnae for both conspecific calls and bat detection, if predated by bats (dB peak at 144 kHz).…”

Ear pinnae in a neotropical katydid (Orthoptera: Tettigoniidae) function as ultrasound guides for bat detection

“…intensively studied in the Neotropical regions. Gorgona Island, Colombia, is home to over 33 bat species with many still undescribed and underrepresented in wildlife inventories, including at least three substrate gleaning bats of the neotropical leaf-nosed bat family Phyllostomidae (56).…”

“…intensively studied in the Neotropical regions. Gorgona Island, Colombia, is home to over 33 bat species with many still undescribed and underrepresented in wildlife inventories, including at least three substrate gleaning bats of the neotropical leaf-nosed bat family Phyllostomidae (Murillo G et al, 2014). Neotropical katydids have evolved sophisticated auditory features as strategies for survival against substrate gleaning bats (Belwood, 1990;Belwood and Morris, 1987;Nickle and Castner, 1995;ter Hofstede et al, 2017ter Hofstede et al, , 2010.…”

Daytime diet of the lesser sac-winged bat (Saccopteryx leptura) in a Colombian Pacific Island

“…There are currently 15 bat species reported for Gorgona Island, 9 of them are insectivorous (Murillo et al 2014). Since S. leptura is abundant on Gorgona and exhibits an extended active period (Vivas-Toro and Murillo-García 2020), its insular population is suitable for studying diet composition and feeding habits of the species.…”