Attack behavior leading cannibalism in tropical gar (Atractosteus tropicus) larvae under different tank colors and shelter type

Sepúlveda-Quiroz, César A.; Álvarez-Villagómez, Carina Shianya; Mendoza-Porras, O.; Peña-Marín, Emyr Saúl; Maytorena-Verdugo, Claudia I.; Pérez-Jiménez, Graciela M.; Jesus-Contreras, R.; Álvarez‐González, Carlos Alfonso; Martínez‐García, Rafael

doi:10.1016/j.aquaculture.2022.738991

Cited by 3 publications

(3 citation statements)

References 46 publications

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“…The use of Trp as a mitigator of cannibalism in fish is based on the principle of increasing the bioavailability of this amino acid, which functions as an essential substrate for the synthesis of 5-HT and, in turn, reduces aggressiveness in fish, promoting the reduction in cannibalism. On the other hand, the differences between the total weight and size of a cannibal fish and its prey were 16.39 ± 10.864% and 15.23 ± 5.68%, respectively, similar percentages to those reported by Sepúlveda-Quiroz et al [57].…”

Section: Cannibalismsupporting

confidence: 89%

“…Regardless of the presence or absence of any type of shelter (rocks and artificial vegetation), the larvae fed with Trp (10 g/kg) did not attack, unlike the larvae fed with CD. Of the three scenarios analyzed, the artificial vegetation did not lead to attacks among the larvae fed with CD, as reported by Sepúlveda-Quiroz et al [57]. The use of enriched environments attempts to replicate the conditions of the natural environment in the culture ponds, improving stress levels by reducing aggression, cannibalism, energy expenditure, injuries, and diseases [78][79][80][81].…”

Section: Behaviormentioning

confidence: 54%

“…The interaction between Trp and digestive enzymes has been studied in several works; however, this interaction related to cannibalism has not yet been addressed. For A. tropicus larvae, it has been reported that the functionality of its digestive system and the differentiation of its organs are completely developed at 9 DAH [58] and, in addition to their anatomy (mouth width and depth, lengths of upper and lower jaw, and mouth depth angle), allow them to capture and ingest their own conspecifics (intracohort cannibalism) [57]. With the administration of Trp, the enzymes acid and alkaline proteases, trypsin, and leucine aminopeptidase registered a lower activity than with that of CD, except for lipases.…”

Section: Digestive Enzymesmentioning

confidence: 99%

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Tryptophan Reduces Intracohort Cannibalism Behavior in Tropical Gar (Atractosteus tropicus) Larvae

Sepúlveda-Quiroz,

Pérez-Jiménez,

Asencio-Alcudia

et al. 2024

Fishes

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The intracohort cannibalism present in tropical gar larvae (A. tropicus) generates great problems in its culture, as in other fish species around the world. The addition of tryptophan (Trp) (10, 20, and 30 g/kg) and a control diet (CD) without Trp were evaluated in A. tropicus larvae regarding growth, survival, cannibalism, behavior, digestive enzymatic activity, and genes related to aggressiveness and/or cannibalism in two stages: 0–13 days after hatching (DAH); and only cannibals (14–24 DAH). In the first stage, no differences were observed in growth parameters; cannibalism was lower with the use of Trp, with the lowest percentage being the 10 g/kg Trp treatment (56.75 ± 2.47%) compared to CD (64.75 ± 1.76%). In the second stage, survival was greater in 10 g/kg Trp (75.00 ± 7.07%) than in CD (23.33 ± 5.77%). Thus, cannibalism was lower with 10 g/kg Trp (20.0 ± 10.0%) compared to CD (76.66 ± 5.77%). Cannibal larvae fed with 10 g/kg Trp had a greater enzymatic activity in acid and alkaline proteases and leucine aminopeptidase, as well as the overexpression of avpi1, crh, and htr1a and the subexpression of tph1, th, sstr1, and hdc (p < 0.05). No aggressive behaviors were recorded in the larvae fed with the 10 g/kg Trp treatment, unlike those fed with CD. The use of 10 g/kg Trp improves survival and reduces cannibalism in A. tropicus larvae.

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Section: Cannibalismsupporting

confidence: 89%

Section: Behaviormentioning

confidence: 54%

Section: Digestive Enzymesmentioning

confidence: 99%

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Tryptophan Reduces Intracohort Cannibalism Behavior in Tropical Gar (Atractosteus tropicus) Larvae

Sepúlveda-Quiroz,

Pérez-Jiménez,

Asencio-Alcudia

et al. 2024

Fishes

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Intra-cohort cannibalism and aggressive behavior in tropical gar (Atractosteus tropicus) larvae: Effects of stocking density and starvation

Sepúlveda-Quiroz,

Alvarez-Villagomez,

Álvarez-González

et al. 2024

Aquaculture

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Mathematical Model to Study the Effect of Refuge on Cannibalism in Atractosteus tropicus

Sepúlveda-Quiroz,

Valenzuela,

Blé

et al. 2024

Mathematics

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Cannibalism is a behavior that different species of fish exhibit in the early stages of their life, and it has been widely reported. In Tabasco, Mexico, the ancestral species Atractosteus tropicus is farmed, which is a freshwater fish with a high nutritional and economic value. This species exhibits high cannibalistic behavior both in its larval and juvenile stages, which considerably decreases its production. Therefore, strategies have been developed to mitigate the effects of this behavior. One of them is the placement of shelters (rocks and artificial vegetation), which allow the vulnerable population to protect themselves from cannibals. The goal of this work is to study the effect of shelters on the cannibalistic behavior of the A. tropicus population through a mathematical model. The population is divided into two classes, the vulnerable population (prey) and the cannibal population (predator). Moreover, a system of ordinary differential equations is established, which is analyzed, and sufficient conditions for the coexistence of the two species are shown. Numerical simulations show coexistence by varying levels of refuge. The results obtained in this work can be applied to other populations that exhibit cannibalistic behavior.

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Attack behavior leading cannibalism in tropical gar (Atractosteus tropicus) larvae under different tank colors and shelter type

Cited by 3 publications

References 46 publications

Tryptophan Reduces Intracohort Cannibalism Behavior in Tropical Gar (Atractosteus tropicus) Larvae

Tryptophan Reduces Intracohort Cannibalism Behavior in Tropical Gar (Atractosteus tropicus) Larvae

Intra-cohort cannibalism and aggressive behavior in tropical gar (Atractosteus tropicus) larvae: Effects of stocking density and starvation

Mathematical Model to Study the Effect of Refuge on Cannibalism in Atractosteus tropicus

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