Effect of fishing effort on the trophic functioning of tropical estuaries in Brazil

Lira, Alex Souza; Lucena‐Frédou, Flávia; Lacerda, Carlos Henrique Figueiredo; Eduardo, Leandro Nolé; Ferreira, Valdimere; Frédou, Thierry; Ménard, Frédéric; Angelini, Ronaldo; Loc’h, François Le

doi:10.1016/j.ecss.2022.108040

Cited by 3 publications

(3 citation statements)

References 104 publications

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“…Thus, estuarine use by C. latus juveniles may have important consequences in terms of organic matter transfer from the continent to the sea. These results complement existing knowledge on the local ecology of the species (Lessa et al 2009, Gonzalez et al 2021, 2022, highlighting the fact that the quality of inshore environments plays a key role in maintaining offshore stocks, thereby affecting the productivity of the adjacent coastal zone.…”

Section: Juvenile Habitat Contributions To Coastal Fisheriessupporting

confidence: 80%

“…The juveniles of the species are also reported at sea (Figueiredo & Menezes 1980, Medeiros et al 2017. However, C. latus juveniles are commonly found within local estuaries (Figu eiredo & Menezes 1980, Paiva & Araújo 2010, Medeiros et al 2017, Silva-Júnior et al 2017, where they feed on a wide diversity of fish and crustaceans (Figueiredo et al 2006, Gonzalez et al 2021, playing a key role in estuarine food webs (Lira et al 2018(Lira et al , 2022.…”

Section: Introductionmentioning

confidence: 99%

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Importance of estuaries for the horse-eye jack Caranx latus in northeastern Brazil: a case study of underestimated connectivity at the land-sea interface

Gonzalez¹,

Frédou²,

Duarte‐Neto³

et al. 2024

Mar. Ecol. Prog. Ser.

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This study aimed to evaluate the importance of inshore estuarine habitats for the maintenance of offshore exploited stocks of the horse-eye jack Caranx latus, a marine tropical species of high economic value. Otoliths of 143 yearlings were used to develop a data set of multi-elemental fingerprints for different juvenile habitats of C. latus in northeastern Brazil, including 7 estuaries and the coastal zone. This data set was then compared to the signatures in the juvenile part of the otolith of 40 sub-adult and adult fish caught at sea to identify their origin. Although otolith multi-elemental concentrations overlapped for some of the estuaries investigated, the maximum overall discrimination accuracy between them was only 58%. However, grouping several estuaries according to their similarity in elemental signatures increased accuracy to 80%. In both cases, correct re-assignment rates for the coastal zone were above 94%, and strontium (Sr) was the most significant element in juvenile habitat discrimination. The remaining elements (B, Ba, Co, P, Rb, and Zn) allowed us to distinguish between 3 distinct groups of estuaries, for which correct re-assignment rates were 70-88%. Juvenile fingerprints in sub-adult and adult otoliths revealed that most of the fish in the local, exploited stock (75%) originate from an inshore estuarine habitat, particularly from larger estuaries under constant marine influence (32.5%). This biological connectivity between continental and coastal waters should be considered for the conservation of tropical marine coastal stocks in general, as it is likely to apply to other exploited marine species, in Brazil and elsewhere.

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Section: Juvenile Habitat Contributions To Coastal Fisheriessupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Importance of estuaries for the horse-eye jack Caranx latus in northeastern Brazil: a case study of underestimated connectivity at the land-sea interface

Gonzalez¹,

Frédou²,

Duarte‐Neto³

et al. 2024

Mar. Ecol. Prog. Ser.

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“…The local environment will be severely harmed by overfishing and overuse of marine resources [1], which will have an impact on how nearby communities and the global community are developed and how food chains are supplied [2]. Overfishing, which is mostly caused by illicit, unreported, and unregulated (IUU) fishing [3], is the principal cause of the depletion of marine fisheries resources.…”

Section: Introductionmentioning

confidence: 99%

Fishing Behavior Detection and Analysis of Squid Fishing Vessel Based on Multiscale Trajectory Characteristics

Zhang

Yuan

Huang

et al. 2023

JMSE

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Accurate fishing activity detection from the trajectories of fishing vessels can not only achieve high-precision fishery management but also ensure the reasonable and sustainable development of marine fishery resources. This paper proposes a new method to detect fishing vessels’ fishing activities based on the defined local dynamic parameters and global statistical characteristics of vessel trajectories. On a local scale, the stop points and points of interest (POIs) in the vessel trajectory are extracted. Voyage extraction can then be conducted on this basis. After that, multiple characteristics based on motion and morphology on a global scale are defined to construct a logistic regression model for fishing behavior detection. To verify the effectiveness and feasibility of the method, vessel trajectory data, and fishing log data collected from Chinese ocean squid fishing vessels in Argentine waters in 2020 are integrated for fishing operation detection. Multiple evaluation metrics show that the proposed method can provide robust and accurate recognition results. Moreover, further analysis of the temporal and spatial distribution and seasonal changes in squid fishing activities in Argentine waters has been performed. A more refined assessment of the fishing activities of individual fishing vessels can also be provided quantitatively. All the results above can benefit the regulation of fishing activities.

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Trophic ecology of fishes in estuaries

Whitfield,

Blaber,

Elliott

et al. 2024

Rev Fish Biol Fisheries

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Effect of fishing effort on the trophic functioning of tropical estuaries in Brazil

Cited by 3 publications

References 104 publications

Importance of estuaries for the horse-eye jack Caranx latus in northeastern Brazil: a case study of underestimated connectivity at the land-sea interface

Importance of estuaries for the horse-eye jack Caranx latus in northeastern Brazil: a case study of underestimated connectivity at the land-sea interface

Fishing Behavior Detection and Analysis of Squid Fishing Vessel Based on Multiscale Trajectory Characteristics

Trophic ecology of fishes in estuaries

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