Chapter 5. Prey Chemical Discrimination, Foraging Mode, and Phylogeny

1994 ◽  
pp. 95-116 ◽  
Keyword(s):  
Foraging Mode ◽  
Chemical Discrimination

Prey chemical discrimination by a diploglossine lizard, the giant Hispaniolan galliwasp (Celestus warreni)

2009 ◽  
Vol 30 (1) ◽  
pp. 135-140 ◽  
Author(s):  
William Cooper ◽  
Kelly Bradley
Keyword(s):  
Composite Index ◽  
Response Strength ◽  
Tongue Flick ◽  
Foraging Mode ◽  
Plant Chemical ◽  
Prey Chemicals ◽  
Chemical Discrimination ◽  
Active Forager ◽  
Tongue Flicking ◽  
And Control

AbstractPrey chemical discrimination, the ability to respond differentially to prey chemicals and control stimuli, enables many squamate reptiles to locate and identify prey using chemical cues sampled by tongue-flicking and analyzed by vomerolfaction. Among lizards this ability is limited to species that are active foragers having insectivorous/carnivorous diets and to omnivores and herbivores, even those derived from ancestral ambush foragers. We experimentally studied responses by hatchlings of giant Hispaniolan galliwasps, Celestus warreni, which appear to have a strict animal diet and are putatively active foragers, to prey chemicals and control substances. More individuals tongue-flicked in the cricket condition than the water condition. Response strength indicated by the tongue-flick attack score, a composite index of response strength based on number of tongue-flicks, biting (one lizard) and latency to bite, was greater in response to cricket stimuli than plant (lettuce) stimuli, cologne or distilled water. Thus, the galliwasps exhibited prey chemical discrimination. Celestus warreni, the first representative of Diploglossinae to be tested, exhibits chemosensory behavior similar to that of other anguids. Although no quantitative data on foraging mode are available, another diploglossine, Diploglossus vittatus, is an active forager. The limitation of prey chemical discrimination to active foragers among lizards with animal diets lend further support to the likelihood that C. warreni is an active forager. The galliwasps did not exhibit plant chemical discrimination.

Do lingual behaviors and locomotion by two gekkotan lizards after experimental loss of bitten prey indicate chemosensory search?

1996 ◽  
Vol 17 (3) ◽  
pp. 217-231 ◽  
Author(s):  
Christopher S. DePerno ◽  
William E. Cooper ◽  
Laura J. Steele
Keyword(s):  
Vomeronasal System ◽  
Foraging Mode ◽  
Gekko Gecko ◽  
Leopard Gecko ◽  
Prey Chemicals ◽  
Chemical Discrimination ◽  
Tokay Gecko ◽  
Tongue Flicking ◽  
Ambush Foraging ◽  
Tongue Flicks

AbstractPoststrike elevation in tongue-flicking rate (PETF) and strike-induced chemosensory searching (SICS) were assessed experimentally in two species of gekkonoid lizards belonging to families differing in foraging mode. PETF is an increase in rate of lingual protrusions after a prey item has been bitten and escapes or is removed from the mouth of a squamate reptile, whereas SICS is PETF combined with locomotory searching behavior. Eublepharis mucularius, the leopard gecko, is an actively, albeit slowly, foraging eublepharid. This species exhibited PETF for a duration of about five minutes based on total lingual protrusions. Labial-licks were initially much more frequent than tongue-flicks. A substantial increase in movement occurred during minutes 5-8, hinting that SICS might be present, but was not quite significant. SICS is likely present, as in other actively foraging lizards, but was not conclusively demonstrated. Handling the lizards induced increased locomotion in both the experimental condition and a control condition, presumably accounting for the apparent delay in onset of increased movement. The tokay gecko, Gekko gecko, a gekkonid ambush forager, performed no tongue-flicks, but exhibited PETF based on labial-licks during the first minute. SICS was absent. These findings support the hypothesis that SICS is absent in ambush foraging lizards, which do not use the lingual-vomeronasal system to search for prey. They are suggestive, but equivocal regarding the hypothesis that SICS is present in actively foraging lizards that exhibit lingually mediated prey chemical discrimination. The finding of PETF in G. gecko suggests that this species and several iguanians previously found to increase rates of labial-licking after biting prey may be able to detect prey chemicals.

scholarly journals More than Meets the Eye: Functionally Salient Changes in Internal Bone Architecture Accompany Divergence in Cichlid Feeding Mode

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
R. Craig Albertson ◽  
W. James Cooper ◽  
Kenneth A. Mann
Keyword(s):  
Genetic Basis ◽  
Dominant Mode ◽  
Bone Architecture ◽  
Foraging Strategies ◽  
Craniofacial Skeleton ◽  
Suction Feeding ◽  
Foraging Mode ◽  
Feeding Mode ◽  
Adaptive Radiations ◽  
African Cichlids

African cichlids have undergone extensive and repeated adaptive radiations in foraging habitat. While the external morphology of the cichlid craniofacial skeleton has been studied extensively, biomechanically relevant changes to internal bone architecture have been largely overlooked. Here we explore two fundamental questions: (1) Do changes in the internal architecture of bone accompany shifts in foraging mode? (2) What is the genetic basis for this trait? We focus on the maxilla, which is an integral part of the feeding apparatus and an element that should be subjected to significant bending forces during biting. Analyses of μCT scans revealed clear differences between the maxilla of two species that employ alternative foraging strategies (i.e., biting versus suction feeding). Hybrids between the two species exhibit maxillary geometries that closely resemble those of the suction feeding species, consistent with a dominant mode of inheritance. This was supported by the results of a genetic mapping experiment, where suction feeding alleles were dominant to biting alleles at two loci that affect bone architecture. Overall, these data suggest that the internal structure of the cichlid maxilla has a tractable genetic basis and that discrete shifts in this trait have accompanied the evolution of alternate feeding modes.

scholarly journals Changes in foraging mode caused by a decline in prey size have major bioenergetic consequences for a small pelagic fish

2021 ◽  
Author(s):  
Elisa Thoral ◽  
Quentin Queiros ◽  
Damien Roussel ◽  
Gilbert Dutto ◽  
Eric Gasset ◽  
...  
Keyword(s):  
Prey Size ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Foraging Mode

scholarly journals Social intelligence, human intelligence and niche construction

2007 ◽  
Vol 362 (1480) ◽  
pp. 719-730 ◽  
Author(s):  
Kim Sterelny
Keyword(s):  
Social Intelligence ◽  
Niche Construction ◽  
Ecological Environment ◽  
Social Environments ◽  
Foraging Mode ◽  
Social Intelligence Hypothesis ◽  
Hominin Evolution ◽  
The Social ◽  
Ecological Complexity ◽  
Intelligence Models

This paper is about the evolution of hominin intelligence. I agree with defenders of the social intelligence hypothesis in thinking that externalist models of hominin intelligence are not plausible: such models cannot explain the unique cognition and cooperation explosion in our lineage, for changes in the external environment (e.g. increasing environmental unpredictability) affect many lineages. Both the social intelligence hypothesis and the social intelligence–ecological complexity hybrid I outline here are niche construction models. Hominin evolution is hominin response to selective environments that earlier hominins have made. In contrast to social intelligence models, I argue that hominins have both created and responded to a unique foraging mode; a mode that is both social in itself and which has further effects on hominin social environments. In contrast to some social intelligence models, on this view, hominin encounters with their ecological environments continue to have profound selective effects. However, though the ecological environment selects, it does not select on its own. Accidents and their consequences, differential success and failure, result from the combination of the ecological environment an agent faces and the social features that enhance some opportunities and suppress others and that exacerbate some dangers and lessen others. Individuals do not face the ecological filters on their environment alone, but with others, and with the technology, information and misinformation that their social world provides.

scholarly journals Prey Status Affects Paralysis Investment in the Ponerine Ant Harpegnathos venator

Insects ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 26
Author(s):  
Lei Nie ◽  
Fei Zhao ◽  
Yiming Chen ◽  
Qian Xiao ◽  
Zhiping Pan ◽  
...  
Keyword(s):  
Activity Level ◽  
Food Storage ◽  
Colony Development ◽  
Foraging Mode ◽  
Live Prey ◽  
Ponerine Ants ◽  
Behavioral Mechanism ◽  
Significant Difference ◽  
Ponerine Ant ◽  
Predatory Insects

The paralysis behavior of some ponerine ants when foraging may be important for food storage and colony development. However, how workers invest in paralysis under different prey circumstances is often overlooked. Here, we report the prey-foraging behavior and paralysis behavior of Harpegnathos venator under different food supply conditions. Solitary hunting was the main foraging mode of H. venator, with occasional simple collective hunting. Nymphal cockroaches with high activity were the most attractive to H. venator. In the experiment, we found that the stings of H. venator completely paralyzed the cockroaches. The stinging time was significantly longer at a higher prey activity level and for larger cockroaches. In addition, there was no significant difference in the stinging time of H. venator for different prey densities. The results showed that the longer similar cockroaches were stung, the longer it took for them to revive and move. These results are helpful for further understanding the behavioral mechanism underlying the food storage of live prey by predatory insects.

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