Boldness–exploration behavioral syndrome in wild sub-adult green sea turtles caught at Oita, Japan

Kudo, Hiromi; Nishizawa, Hideaki; Uchida, Kei; Sato, Katsufumi

doi:10.1016/j.applanim.2021.105216

Cited by 11 publications

(7 citation statements)

References 60 publications

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“…Boldness affects individuals’ behavior toward potential risk, while exploration reflects individuals’ differences in exploring novel environments and objects [ 6 ]. In this study, there was no significant difference in the performance of explorer and avoidance individuals in safe environments ( Table 1 ), indicating that exploration differences did not affect their territorial behavior.…”

Section: Discussionmentioning

confidence: 99%

“…Among these, boldness and exploration represent behavioral responses to stressors [ 3 ]. In some species, such as the killifish ( Rivulus hartii ) [ 4 ], cichlid ( Amatitlania siquia ) [ 5 ], and green sea turtle ( Chelonia mydas ) [ 6 ], boldness and exploration co-evolved commonly positively intercorrelated and formed the boldness-exploration behavioral syndrome [ 7 ]. The boldness-exploration behavioral syndrome is the core of individual migration and anti-predation behavior in populations and a fundamental cause of population heterogeneity [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

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Each Personality Performs Its Own Function: Boldness and Exploration Lead to Differences in the Territoriality of Swimming Crabs (Portunus trituberculatus)

Zhu

Wang

Ren³

et al. 2023

Biology

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The boldness and exploration of animals are closely related to their territoriality, with relevant studies having important applications in wildlife conservation. The present study establishes a behavior observation system measuring the boldness and exploration of swimming crabs (Portunus trituberculatus) to clarify the relationship between boldness, exploration, and territoriality, as well as to provide a behavioral basis for the construction of marine ranching. The behavioral tests of crabs in a safe environment (predator absence), a dangerous environment (predator presence), and habitat selection (complex and simple habitat) are analyzed. A territorial behavior score is calculated as an evaluation index of territoriality. The correlation between the swimming crabs’ boldness, exploration, and territoriality is analyzed. The results show that there is no boldness-exploratory behavioral syndrome. In predator absence or presence environments, boldness is dominant in territorial behavior and positively correlates with territoriality. Exploration plays a vital role in habitat selection tests but has no significant correlation with territoriality. The experimental results preliminarily show that boldness and exploration jointly develop the difference in the space utilization ability of crabs with different personalities, improving the adaptability of swimming crabs in different conditions. The results of this study supplement the behavior rules of the dominant species of typical fishery resources in marine ranches, providing a basis for achieving animal behavior management function in marine ranches.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Each Personality Performs Its Own Function: Boldness and Exploration Lead to Differences in the Territoriality of Swimming Crabs (Portunus trituberculatus)

Zhu

Wang

Ren³

et al. 2023

Biology

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“…In our study, green turtles captured both from the pier and in the net were on average 14.5 cm larger when they were pier‐captured ( n = 11). It is difficult to directly examine boldness in juvenile sea turtles either in a laboratory (Klefoth et al, 2017; but see Kudo et al, 2021) or in the wild (Breck et al, 2019; Hertel et al, 2019). Griffin et al (2017) were able to observe green turtle behavior in relation to snorkelers; however, in general, sea turtles move large distances, inhabit deep waters, and may remain submerged at depth for several hours.…”

Section: Discussionmentioning

confidence: 99%

“…Studies of sea turtles captured in recreational fishing activities have focused almost exclusively on individuals once they are captured (Cook et al, 2020;Rudloe & Rudloe, 2005;Seney, 2017) or after they have been released from subsequent rehabilitation (Coleman et al, 2016). Other studies have shown that juvenile green turtles (Chelonia mydas) exhibit individual differences in boldness (Griffin et al, 2017;Kudo et al, 2021). Capture vulnerability may also be affected by variations in the morphology, life-history traits, and behavior of a species.…”

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confidence: 99%

Capture vulnerability of sea turtles on recreational fishing piers

Lamont

Mollenhauer

Foley

2021

Ecology and Evolution

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Capture vulnerability of commercial and recreational fishes has been associated with behavioral, morphological, and life‐history traits; however, relationships with non‐target species, such as sea turtles, have not been adequately studied. We examined species composition, timing of captures, morphological variables including body size and head width, and body condition of sea turtles captured from a recreational fishing pier in the northern Gulf of Mexico and of sea turtles captured in the waters adjacent to the pier. From 2014 to 2019, 148 net captures and 112 pier captures of three sea turtle species were documented. Green turtles were captured most frequently in the net and on the pier. Turtles captured from the pier were larger than those captured in the net. There was no difference in head width between net‐caught and pier‐caught turtles; however, small sample sizes limited those comparisons. The body condition index was lower for pier‐caught than net‐caught Kemp’;s ridleys but did not differ with green turtles or loggerheads. Differences were also observed in the timing of capture on the pier as compared to in the net. Finally, the relationship between size, body condition, and pier‐capture vulnerability suggests these are complex interactions. Mortality of sea turtles captured from fishing piers could be selecting against bolder individuals, which may result in changes in sea turtle population demographics over a long time period.

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“…Further, these traits can become “packaged together” into behavioral syndromes (Sih et al 2004). For instance, studies spanning diverse taxa such as common voles ( Microtus arvali ) (Herde and Eccard 2013), convict cichlids ( Amatitlania nigrofasciata ) (Mazué et al 2015), sea turtles ( Chelonia mydas) (Kudo et al 2021), and great tits ( Parus major ) (Cole and Quinn 2011) document positive correlations between boldness, activity, and exploration.…”

Section: Introductionmentioning

confidence: 99%

Individual Behavioral Variability Across Time and Contexts inDendrobates tinctoriusPoison Frogs

Soto,

Hardin,

Alleyne

et al. 2023

Preprint

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Consistent individual differences in behavior (aka, “animal personality”) have consequences for individual fitness, adaptive trajectories, and species’ persistence. Such differences have been documented across a wide range of animals, though amphibians are generally underrepresented in this research area. The aim of our study was to examine consistent individual differences in poison frogs (Dendrobates tinctorius). We evaluated repeatability in behaviors including activity, exploration, and boldness to assess consistency of behaviors across different temporal, experimental, and environmental contexts. We found repeatability in activity and exploration across time and contexts. In contrast, we observed context-specific behavior for our metrics of boldness, with consistent individual differences only for some measures. Further, while activity and exploration displayed consistent correlations across contexts, relationships between activity and boldness were context dependent. Our findings document the presence of consistent individual differences in behavior in poison frogs, challenging historic assumptions about the simplicity of amphibian behavior. Nonetheless, our approach testing the same individuals across multiple time points and assays also reveals context-dependent differences, highlighting the complex relationship between consistent individual differences and context-specific responses in animal behavior.Statement of SignificanceThe concept of animal personality centers on the existence of consistent individual differences in behavior. However, behavioral responses can also depend on the context, and consistent individual differences in one context do not guarantee consistent differences in another. To address this question, we assessed activity, exploration, and boldness in captive-bred poison frogs (Dendrobates tinctorius) across time and environmental contexts. Our comprehensive approach revealed consistent individual differences in some behaviors and context-specificity in others. While activity and exploration were generally repeatable and correlated with one another, boldness was not. Especially in view of the emphasis on measures of boldness in the animal personality literature, our findings emphasize the importance of reiterative and holistic approaches in the study of animal behavior.

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Boldness–exploration behavioral syndrome in wild sub-adult green sea turtles caught at Oita, Japan

Cited by 11 publications

References 60 publications

Each Personality Performs Its Own Function: Boldness and Exploration Lead to Differences in the Territoriality of Swimming Crabs (Portunus trituberculatus)

Each Personality Performs Its Own Function: Boldness and Exploration Lead to Differences in the Territoriality of Swimming Crabs (Portunus trituberculatus)

Capture vulnerability of sea turtles on recreational fishing piers

Individual Behavioral Variability Across Time and Contexts inDendrobates tinctoriusPoison Frogs

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