New records of Heloderma alvarezi (Wiegmann, 1829) (Sauria: Helodermatidae) on the coast of Oaxaca and  increases to its distribution in Mexico

García-Grajáles, Jesús; Bohórquez, Rodrigo Arrazola; Macías, María Arely Penguilly; Silva, Alejandra Buenrostro

doi:10.11609/jott.5691.12.4.15495-15498

Cited by 2 publications

(1 citation statement)

References 9 publications

(9 reference statements)

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“…These daily fixes and temperature registers were divided into four recording periods: every 15 min from 7:00 AM to 11:00 AM; every 30 min from 11:30 AM to 1:00 PM; every 15 min from 3:45 PM to 6:00 PM; and every 30 min from 6:30 PM to 9:00 PM. These hours were selected according to the periods of activity reported for Helodermatids (Beck, 2005; García‐Grajales et al, 2020). Prior to analysis, we discarded unreliable GPS location records (horizontal dilution of precision greater than 8.9).…”

Section: Methodsmentioning

confidence: 99%

Temperature and barometric pressure affect the activity intensity and movement of an endangered thermoconforming lizard

et al. 2022

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Global warming is expected to affect movement-related thermoregulation in ectotherms, but the likely effects on thermoconforming lizards, which spend little energy in thermoregulation behavior, are unclear. We used the Guatemalan beaded lizard (Heloderma charlesbogerti) as a model thermoconforming species to investigate the effects of ambient temperature and barometric pressure (a cue for rain in the study area) on activity intensity and the structure of movement paths. We tracked 12 individuals over a total of 148 animal days during the wet season of 2019 using Global Positioning System tags and triaxial accelerometry. We found a clear positive effect of ambient temperature on activity (using vectorial dynamic body acceleration [VeDBA]) and step length of lizard movements. The movement also became more directional (longer step lengths and smaller turning angles) with increasing ambient temperatures. There was a small negative effect of barometric pressure on VeDBA. We propose that our patterns are indicative of internal state changes in the animals, as they move from a state of hunger, eliciting foraging, which is enhanced by lower temperatures and rainfall to a thermally stressed state, which initiates shelter-seeking. Our findings highlight the sensitivity of this species to temperature change, show that not all thermoconforming lizards are thermal generalists, and indicate that predicted regional increases in temperature and reduction in rainfall are likely to negatively impact this species by reducing the width of their operational thermal window.

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Section: Methodsmentioning

confidence: 99%

Temperature and barometric pressure affect the activity intensity and movement of an endangered thermoconforming lizard

et al. 2022

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Revision of the Laonice bahusiensis complex (Annelida: Spionidae) with a description of three new species

Sikorski

Radashevsky

Castelli

et al. 2021

Zootaxa

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The morphological reexamination of specimens previously identified as Laonice bahusiensis Söderström, 1920 from North European and Mediterranean collections, supported by the molecular analysis of freshly collected material, enabled the recognition of four different species in the region: the genuine L. bahusiensis, L. irinae n. sp. from North European waters, and L. grimaldii n. sp. and L. mediterranea n. sp. from the Mediterranean Sea. The morphology of these species is described and illustrated, and their distributions are clarified based on old and new materials. A key for their identification is also provided. The Bayesian analysis of the COI sequences (483 bp) showed that these four species form a clade, namely the L. bahusiensis species complex, morphologically characterized by the continuous dorsal crests on postbranchiate chaetigers in the adults. The genetic p-distances between the species of the complex ranged from 13.27% to 17.99%, while the intraspecific variability ranged from 0.6% to 1.57%. Together with the sister species Laonice cirrata (Sars, 1851), the L. bahusiensis complex formed the Laonice (Laonice) clade, which is morphologically characterized by the prostomium fused with the anterior peristomial margin. However, the monophyly of the L. bahusiensis complex, as well as that of the clade Laonice (Laonice), needs to be further supported through the analysis of a greater set of genes from a larger number of species.

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New records of Heloderma alvarezi (Wiegmann, 1829) (Sauria: Helodermatidae) on the coast of Oaxaca and increases to its distribution in Mexico

Cited by 2 publications

References 9 publications

Temperature and barometric pressure affect the activity intensity and movement of an endangered thermoconforming lizard

Temperature and barometric pressure affect the activity intensity and movement of an endangered thermoconforming lizard

Revision of the Laonice bahusiensis complex (Annelida: Spionidae) with a description of three new species

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