Discovery and defense define the social foraging strategy of Neotropical arboreal ants

2018 ◽  
Vol 72 (7) ◽  
Author(s):  
Flávio Camarota ◽  
Heraldo L. Vasconcelos ◽  
Elmo B. A. Koch ◽  
Scott Powell
Keyword(s):  
Foraging Strategy ◽  
Social Foraging ◽  
Arboreal Ants ◽  
The Social

scholarly journals The Role of Outcome Unit Size in the Social Foraging Strategies of Rats

2019 ◽  
Vol 32 ◽  
Author(s):  
Luis Alfaro ◽  
Federico Sanabria ◽  
Rosalva Cabrera
Keyword(s):  
Foraging Strategy ◽  
Feedback Mechanism ◽  
Social Foraging ◽  
Foraging Strategies ◽  
Unit Size ◽  
Sunflower Seeds ◽  
The Social ◽  
Production Strategies ◽  
Highly Correlated

The distribution of foraging strategies and associated activities of Wistar rats was examined, with food outcomes presented in small vs. large units. Groups of 4 rats foraged for food in a 4 x 3 array of covered holes, some containing 4 g of food. For some groups, food consisted of shelled sunflower seeds (small units); for other groups, food consisted of 3 pellets of chow (large units). Foraging strategies were classified as either production (seeking patches with food) or scrounging (tracking conspecifics). Production strategies were more common among groups that foraged for pellets instead of seeds. Producing food was highly correlated with contacting gates covering holes, whereas scrounging for food was highly correlated with following others in the group. The prevalence of activities associated with each foraging strategy was highly correlated with the proportion of time spent consuming food obtained from each activity (i.e., produced vs. scrounged food). Taken together, these findings suggest that, similar to other species, the finder’s advantage (low with small units, high with large units) modulates social foraging strategies in rats. A simple outcome-strategy feedback mechanism appears to mediate this modulation.

Intraspecific variation in opportunistic use of trophic resources by the lizard Ameiva corax (Squamata: Teiidae)

2016 ◽  
Vol 37 (3) ◽  
pp. 331-334 ◽  
Author(s):  
Grace Garrison ◽  
Mia Phillips ◽  
Maria Eifler ◽  
Douglas Eifler
Keyword(s):  
Social Network ◽  
Intraspecific Variation ◽  
Foraging Strategy ◽  
Small Island ◽  
Food Items ◽  
Trophic Resources ◽  
Present Information ◽  
The Social

Ameiva corax is restricted to a small island (<2 ha), off the coast Anguilla. We present information on intraspecific variation in its diet, based on observations of 190 marked individuals. Larger individual were more likely to attempt to enter active seabird nests and only large males were observed to successfully enter a nest and break open an egg. Flower eating was commonly observed and its occurrence was not related to lizard size or sex. More than half the population was observed visiting areas where fisherman mixed their bait, a foraging strategy also unrelated to lizard size or sex. Ameiva corax is known to socially feed at large food items such as seabird eggs. The individuals that can initially access these food items may occupy key roles in the social network.

scholarly journals Individual-learning ability predicts social-foraging strategy in house sparrows

2010 ◽  
Vol 278 (1705) ◽  
pp. 582-589 ◽  
Author(s):  
Edith Katsnelson ◽  
Uzi Motro ◽  
Marcus W. Feldman ◽  
Arnon Lotem
Keyword(s):  
Personal Information ◽  
Passer Domesticus ◽  
Learning Task ◽  
Foraging Strategy ◽  
Individual Learning ◽  
Social Foraging ◽  
Learning Ability ◽  
Foraging Strategies ◽  
Learning Abilities ◽  
The Individual

Social foragers can use either a ‘producer’ strategy, which involves searching for food, or a ‘scrounger’ strategy, which involves joining others' food discoveries. While producers rely on personal information and past experience, we may ask whether the tendency to forage as a producer is related to being a better learner. To answer this question, we hand-raised house sparrow ( Passer domesticus ) nestlings that upon independence were given an individual-learning task that required them to associate colour signal and food presence. Following the testing phase, all fledglings were released into a shared aviary, and their social-foraging tendencies were measured. We found a significant positive correlation between individual's performance in the individual-learning task and subsequent tendency to use searching (producing) behaviour. Individual-learning score was negatively correlated with initial fear of the test apparatus and with body weight. However, the correlation between individual learning and searching remained significant after controlling for these variables. Since it was measured before the birds entered a social group, individual-learning ability could not be the outcome of being a producer. However, the two traits may be initially associated, or individual learning could facilitate producing behaviour. To our knowledge, this is the first evidence that associates individual-learning abilities with social-foraging strategies in animal groups.

scholarly journals The influence of fish farm activity on the social structure of the common bottlenose dolphin in Sardinia (Italy)

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10960
Author(s):  
Serena Frau ◽  
Fabio Ronchetti ◽  
Francesco Perretti ◽  
Alberto Addis ◽  
Giulia Ceccherelli ◽  
...  
Keyword(s):  
Social Structure ◽  
Bottlenose Dolphin ◽  
Foraging Strategy ◽  
Important Change ◽  
Fish Farm ◽  
Photo Identification ◽  
Common Bottlenose Dolphin ◽  
The Social ◽  
Dolphin Population ◽  
The Common

In a wide variety of habitats, including some heavily urbanised areas, the adaptability of populations of common bottlenose dolphin (Tursiops truncatus) may depend on the social structure dynamics. Nonetheless, the way in which these adaptations take place is still poorly understood. In the present study we applied photo-identification techniques to investigate the social structure of the common bottlenose dolphin population inhabiting the Gulf of Alghero (Sardinia, Italy), analysing data recorded from 2008 to 2019. The social structure analysis showed a division of the entire population into five different communities and the presence of non-random associations, while there was no evidence of segregation between sexes. Furthermore, results highlighted an important change in social structure through time, likely due to a reduction in fish farm activity since 2015. The division of the population into different communities, the presence of segregation based on the foraging strategy (inside or outside the fish farm area) and the social network measures were evaluated by analysing independently the two datasets: the intense and low farm activity periods: 2008–2014 and 2015–2020, respectively. Segregation among individuals belonging to the same foraging strategy class was found only in the earlier period, and the composition of the four communities was consistent with this result. Our study improves the knowledge about bottlenose dolphin adaptation, as a lower complexity in social structure was linked to a reduction in anthropogenic food availability.

scholarly journals An asymmetric producer-scrounger game: body size and the social foraging behavior of coho salmon

2018 ◽  
Vol 11 (4) ◽  
pp. 417-431 ◽  
Author(s):  
Jessica A. Phillips ◽  
Stephanie J. Peacock ◽  
Andrew Bateman ◽  
Mackenzie Bartlett ◽  
Mark A. Lewis ◽  
...  
Keyword(s):  
Body Size ◽  
Foraging Behavior ◽  
Coho Salmon ◽  
Social Foraging ◽  
The Social

scholarly journals Causal evidence for the adaptive benefits of social foraging in the wild

2020 ◽  
Author(s):  
Lysanne Snijders ◽  
Stefan Krause ◽  
Alan N. Tump ◽  
Michael Breuker ◽  
Chente Ortiz ◽  
...  
Keyword(s):  
Poecilia Reticulata ◽  
Social Benefit ◽  
Experimental Manipulation ◽  
Social Foraging ◽  
Foraging Success ◽  
Causal Inferences ◽  
The Social ◽  
In The Wild ◽  
Males And Females ◽  
To Come

Sociality is a fundamental organizing principle across taxa, thought to come with a suite of adaptive benefits. However, making causal inferences about these adaptive benefits requires experimental manipulation of the social environment, which is rarely feasible in the field. Here we manipulated the number of conspecifics in Trinidadian guppies (Poecilia reticulata) in the wild, and quantified how this affected a key benefit of sociality, social foraging, by investigating several components of foraging success. As adaptive benefits of social foraging may differ between sexes, we studied males and females separately, expecting females, the more social and risk-averse sex, to benefit more from conspecifics than males. Conducting over 1,600 foraging trials, we found that in both sexes, increasing the number of conspecifics led to faster detection of novel food patches and a higher probability of feeding following detection of the patch, resulting in greater individual resource consumption. The slope of the latter relationship differed between the sexes, with males unexpectedly exhibiting a stronger social benefit. Our study provides rare causal evidence for the adaptive benefits of social foraging in the wild, and highlights that sex differences in sociality do not necessarily imply an unequal ability to profit from the presence of others.

Implementation of Swarm Social Foraging Behavior in Unmanned Aerial Vehicle (UAV) Quadrotor Swarm

2017 ◽  
Vol 21 (2) ◽  
pp. 197-204
Author(s):  
Gerard Ely U. Faelden ◽  
◽  
Ryan Rhay P. Vicerra ◽  
Laurence A. Gan Lim ◽  
Edwin Sybingco ◽  
...  
Keyword(s):  
Foraging Behavior ◽  
Unmanned Aerial Vehicle ◽  
Swarm Robotics ◽  
Social Foraging ◽  
The Novel ◽  
Test Bed ◽  
The Social ◽  
Aerial Vehicle ◽  
Basic Behavior ◽  
Artificial Potential Function

One of the novel approaches in multiple quadrotor control is swarm robotics. It aims to mimic social behaviors of animals and insects. This paper presents the physical implementation of the swarm social foraging behavior in unmanned aerial vehicle quadrotors. To achieve this, it first explores the basic behavior of aggregation. It is implemented over a quadrotor swarm test-bed that makes use of external motion capture cameras. The completed algorithm makes use of the artificial potential function model combined with the environment resource profile model. Results show successful demonstration of the social foraging algorithm with minimal error in position. Also, the proposed algorithm’s performance presents an increase in aggregation speed and time as the number of swarm member increases.

scholarly journals Cooperative Bacterial Foraging Optimization

2009 ◽  
Vol 2009 ◽  
pp. 1-17 ◽  
Author(s):  
Hanning Chen ◽  
Yunlong Zhu ◽  
Kunyuan Hu
Keyword(s):  
Marked Improvement ◽  
Optimization Problems ◽  
Social Foraging ◽  
Decomposition Level ◽  
Bacterial Foraging Optimization ◽  
E Coli ◽  
Space Decomposition ◽  
Bacterial Foraging ◽  
The Social ◽  
Complex Optimization

Bacterial Foraging Optimization (BFO) is a novel optimization algorithm based on the social foraging behavior ofE. colibacteria. This paper presents a variation on the original BFO algorithm, namely, the Cooperative Bacterial Foraging Optimization (CBFO), which significantly improve the original BFO in solving complex optimization problems. This significant improvement is achieved by applying two cooperative approaches to the original BFO, namely, the serial heterogeneous cooperation on the implicit space decomposition level and the serial heterogeneous cooperation on the hybrid space decomposition level. The experiments compare the performance of two CBFO variants with the original BFO, the standard PSO and a real-coded GA on four widely used benchmark functions. The new method shows a marked improvement in performance over the original BFO and appears to be comparable with the PSO and GA.

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